Bore 30 over - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 05-21-2012, 03:45 PM   #1
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Bore 30 over

What would be better..if I bore it 30 over or 40 over!?? I not too sure
Sonicblue11 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-21-2012, 04:08 PM   #2
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
What plans do you have for the engine?
Rm360 is offline   Reply With Quote
Old 05-21-2012, 04:24 PM   #3
Registered Member
Regular
 
tc x 4's Avatar
 
Join Date: Jan 2012
Region: Indiana
Posts: 3,783
Quote:
Originally Posted by Sonicblue11
What would be better..if I bore it 30 over or 40 over!?? I not too sure
Less is always better. You only have so much metal to work with and you never know when you'll have to do it again.
tc x 4 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-21-2012, 04:42 PM   #4
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
I plan on boring it 30 over with a new crank and getting diamond pistons with h beam rods and trick flow twisted wedge heads with trick flow intake manifold and yeah I think I'm going to do 30
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 04:47 PM   #5
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Did you plan on forced induction at all?
Rm360 is offline   Reply With Quote
Old 05-21-2012, 04:52 PM   #6
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
No not really I need to know what I need first maybe you guys can help me out haha when you say forced induction what do you mean by it? Haha this motor stuff is still all new to me
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 04:56 PM   #7
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Rm360
Did you plan on forced induction at all?
The 4.6 is a bomb waiting to blow if you do forced induction with a over bore, the cylinder walls in a 4.6 are thin already most people I know that do keep it NA with an over bore only go .20 over to keep it safe, either way IMO its not worth spending all that money for a 20 hp gain

---------- Post added at 04:56 PM ---------- Previous post was at 04:55 PM ----------

Quote:
Originally Posted by Sonicblue11
No not really I need to know what I need first maybe you guys can help me out haha when you say forced induction what do you mean by it? Haha this motor stuff is still all new to me
Forced induction like a vortech or kenne bell supercharger
Rm360 is offline   Reply With Quote
Old 05-21-2012, 05:06 PM   #8
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360

The 4.6 is a bomb waiting to blow if you do forced induction with a over bore, the cylinder walls in a 4.6 are thin already most people I know that do keep it NA with an over bore only go .20 over to keep it safe, either way IMO its not worth spending all that money for a 20 hp gain

---------- Post added at 04:56 PM ---------- Previous post was at 04:55 PM ----------



Forced induction like a vortech or kenne bell supercharger
My friend went 30 over and his motor is just fine
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 06:10 PM   #9
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
And yeah I want to supercharge it but I can't with my stock motor so that's why I'm going to bore it
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 06:19 PM   #10
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11
And yeah I want to supercharge it but I can't with my stock motor so that's why I'm going to bore it
What ? If you want to supercharge it don't bore it you will blow the motor up!

---------- Post added at 06:19 PM ---------- Previous post was at 06:15 PM ----------

Quote:
Originally Posted by Rm360

What ? If you want to supercharge it don't bore it you will blow the motor up!
I have a kenne bell running 10 lbs on a stock motor with no problems at all !
Rm360 is offline   Reply With Quote
Old 05-21-2012, 06:30 PM   #11
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Yeah but I want more than 10 Ibs of boost though
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 06:38 PM   #12
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11
Yeah but I want more than 10 Ibs of boost though
Even more so to not bore it , the 4.6 loves boost the more boost you run the more fuel you need which creates more combustion in the chamber if you bore the block you are taking material away from the cylinder wall , you are making the block weaker by doing this!
Rm360 is offline   Reply With Quote
Old 05-21-2012, 06:49 PM   #13
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360

Even more so to not bore it , the 4.6 loves boost the more boost you run the more fuel you need which creates more combustion in the chamber if you bore the block you are taking material away from the cylinder wall , you are making the block weaker by doing this!
Yeah but how do people get like 400rwhp by doing motor work then?
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 06:52 PM   #14
Registered Member
Regular
 
Stockish302's Avatar
 
Join Date: Oct 2011
Region: California
Posts: 297
Dont bore it out if you want to go with boost. If you want more power just raise the boost. I sold a mmr 1000 shortblock stock bore and stroke and the guy is running 25psi making 850+whp with a very conservative tune and stock 2v heads with a mild port.
__________________
BBK cai, 96 tbird maf housing, BBK 70mm TB, TFS intake manifold, BBK shortys, bassani off road X pipe, Flowmasters with turndowns

If any one is willing to donate parts to the Make Joe's Mustang Faster that Corvettes Foundation, donations will be gladly appreciated
Stockish302 is offline   Reply With Quote
Old 05-21-2012, 06:56 PM   #15
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Stockish302
Dont bore it out if you want to go with boost. If you want more power just raise the boost. I sold a mmr 1000 shortblock stock bore and stroke and the guy is running 25psi making 850+whp with a very conservative tune and stock 2v heads with a mild port.
Gotcha well what would the benefit of boring it do? My friend has a bullit and he is bored 30 over and has diamond pistons and is pushing 380whp
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 06:56 PM   #16
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Stockish302
Dont bore it out if you want to go with boost. If you want more power just raise the boost. I sold a mmr 1000 shortblock stock bore and stroke and the guy is running 25psi making 850+whp with a very conservative tune and stock 2v heads with a mild port.
This is how you make more power! 400 rwhp with a supercharger is easy to do
Rm360 is offline   Reply With Quote
Old 05-21-2012, 06:58 PM   #17
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360

This is how you make more power! 400 rwhp with a supercharger is easy to do
I also wanted to do heads and cams as well
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 07:03 PM   #18
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11

I also wanted to do heads and cams as well
Even eaiser then ! All you need is the forged bottom end and it will handle anything you can throw at it , the overbore give you more cubic inches changing the 281 to roughly a 302 but it doesn't have any benifit in a FI application
Rm360 is offline   Reply With Quote
Old 05-21-2012, 07:11 PM   #19
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Gotcha so I could just throw on heads and cams and supercharger and I'll be good? My friend with the bullit has 30 over and he said to make it a 5.0 he needed the crank but he didn't have the money for the crank so he is just 30 over with pistons

---------- Post added at 06:11 PM ---------- Previous post was at 06:11 PM ----------

Quote:
Originally Posted by Rm360

Even eaiser then ! All you need is the forged bottom end and it will handle anything you can throw at it , the overbore give you more cubic inches changing the 281 to roughly a 302 but it doesn't have any benifit in a FI application
And I do appreciate the help man!!! Thanks a lot!!
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 07:16 PM   #20
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11
Gotcha so I could just throw on heads and cams and supercharger and I'll be good? My friend with the bullit has 30 over and he said to make it a 5.0 he needed the crank but he didn't have the money for the crank so he is just 30 over with pistons

---------- Post added at 06:11 PM ---------- Previous post was at 06:11 PM ----------



And I do appreciate the help man!!! Thanks a lot!!
With a set of trick flow heads, custom blower cams , and a supercharger, and a good fuel system set up you will be at 500 rwhp with no problem and be able to run it all day , and you're welcome just don't want you to spend all that money and your engine go boom !!! LOL !!!!
Rm360 is offline   Reply With Quote
Old 05-21-2012, 07:21 PM   #21
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360

With a set of trick flow heads, custom blower cams , and a supercharger, and a good fuel system set up you will be at 500 rwhp with no problem and be able to run it all day , and you're welcome just don't want you to spend all that money and your engine go boom !!! LOL !!!!
Haha I hear ya man I don't want to spend alot either haha I'm only 19 making 14.50 and hour but would I need to change the crank or anything? See the thing is I have 2 motors, the one in my current GT and my totaled GT which I just started to pull the motor so if it was you and you didn't want to spend a lot of money what would you do? Haha
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 07:22 PM   #22
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
This is the motor I'm pulling
Attached Thumbnails
Click image for larger version

Name:	image-4122176053.jpg
Views:	240
Size:	1.23 MB
ID:	51342  
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 07:36 PM   #23
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
You have to decide where you want to go with your build the FI route is more costly due to all the upgrades we were talking about, the NA build will be cheaper but won't get you 400 rwhp even with the overbore , if I had 2 engines I would build a killer FI motor, and the crank can handle some power but it will be a weak link in a FI set up
Rm360 is offline   Reply With Quote
Old 05-21-2012, 07:43 PM   #24
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360
You have to decide where you want to go with your build the FI route is more costly due to all the upgrades we were talking about, the NA build will be cheaper but won't get you 400 rwhp even with the overbore , if I had 2 engines I would build a killer FI motor, and the crank can handle some power but it will be a weak link in a FI set up
What do you mean it would be a weak link?
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 07:47 PM   #25
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11

What do you mean it would be a weak link?
The crank can handle about 600 flywheel hp it would be at its breaking point in the FI set up we were talking about
Rm360 is offline   Reply With Quote
Old 05-21-2012, 08:15 PM   #26
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by Rm360

The crank can handle about 600 flywheel hp it would be at its breaking point in the FI set up we were talking about
Oh okay I gotcha now, would I need to upgrade my clutch and flywheel or anything?
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 08:29 PM   #27
Registered Member
Regular
 
Join Date: Aug 2010
Region: Texas
Posts: 158
Re: Bore 30 over

stock crank can handle over 600RWHP!!!!! its funny the people that say the stock crank cant handle anymore than 600 flywheel hp never even seen a stock crank broke.. i have only seen one break and it was at 700rwhp and the guy was spinning it 7200 rpms...rpms and vibration killed that crank since it was also on the stock balancer..

also just go 20 over...a stroker shortblock is a .020 bore with the stroker crank and rods not .30 over....over boring gains no power acutally....reason more people go .20 over on used block is to get fresh cylinder walls..if you go .30 over then you have no more cylinder wall play if you have any problems you will need to by a new block..just stcik to going just .10-.20 overbore..

also with the designed on the long runners of the trickflow intake it is a high rpm intake so i would suggest staying with the stocker or getting the eddy...the stock intake is good to 700rwhp...the trickflow intake may PEAK better numbers but the power under the peak suffers alot...its a bad *** powerband you want not just peak..when your racing your not staying at 6000+ rpms all the time lol..

and just some useful info the fastest n/a 2v runs a stock cast crank and spins 9200+ rpms and runs mid 9s
slow02gt is offline   Reply With Quote
Old 05-21-2012, 08:29 PM   #28
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Sonicblue11

Oh okay I gotcha now, would I need to upgrade my clutch and flywheel or anything?
Yes to both ! Anytime you want to make more power you want to build all other parts to handle the new power and torque! Building a car isn't cheap to do it right it's very time consuming and it takes time unless your a millionaire! LOL I've been building my car for about 4 yrs now and I still have a ton of stuff to do but I love my car and don't have any plans of getting rid of her
Rm360 is offline   Reply With Quote
Old 05-21-2012, 08:30 PM   #29
Registered Member
Regular
 
Join Date: Aug 2010
Region: Texas
Posts: 158
Re: Bore 30 over

OP what are you wanting a nasty n/a setup or a decently boosted setup?
slow02gt is offline   Reply With Quote
Old 05-21-2012, 08:37 PM   #30
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by slow02gt
OP what are you wanting a nasty n/a setup or a decently boosted setup?
I want a nasty n/a setup but later down the line want to supercharge it, but if I bore .20 over will I see any hp gains from it with trick flow heads and stage 2 cams with longtube headers and diamond pistons with new springs and rocker arms?
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 08:49 PM   #31
Registered Member
Regular
 
Join Date: Aug 2010
Region: Texas
Posts: 158
Re: Bore 30 over

like i stated b4 you wont see any gain really with just boring the motor...they do to get fresh cylinder walls...will you see a gain going with the setup you just posted yes from the heads and cams..see you are contradicting yourself... you can have a decent n/a setup and boost it later your not going to have a nasty n/a setup because in order to have a nasty n/a setup you need to up the compression to abou 11:5:1,custom cams,full exhaust,etc,etc...which wouldnt be to boost friendly...if you have e85 around i would do the shortblock at least 10:1-10:5 and with e85 when you go to boost it..you can still boost the sh*t out of it and still be pump gas(e85)
slow02gt is offline   Reply With Quote
Old 05-21-2012, 09:14 PM   #32
Registered Member
Regular
 
Sonicblue11's Avatar
 
Join Date: Oct 2011
Location: Williamstown
Region: New Jersey
Posts: 542
Quote:
Originally Posted by slow02gt
like i stated b4 you wont see any gain really with just boring the motor...they do to get fresh cylinder walls...will you see a gain going with the setup you just posted yes from the heads and cams..see you are contradicting yourself... you can have a decent n/a setup and boost it later your not going to have a nasty n/a setup because in order to have a nasty n/a setup you need to up the compression to abou 11:5:1,custom cams,full exhaust,etc,etc...which wouldnt be to boost friendly...if you have e85 around i would do the shortblock at least 10:1-10:5 and with e85 when you go to boost it..you can still boost the sh*t out of it and still be pump gas(e85)
Now how would you up the compression? While your telling me all this I'm learning as we go haha
Sonicblue11 is offline   Reply With Quote
Old 05-21-2012, 10:23 PM   #33
Registered Member
Regular
 
Stockish302's Avatar
 
Join Date: Oct 2011
Region: California
Posts: 297
Quote:
Originally Posted by Sonicblue11

Gotcha well what would the benefit of boring it do? My friend has a bullit and he is bored 30 over and has diamond pistons and is pushing 380whp
I see no real benefits of boring out an engine that much, if most just .20 but .30 seems a bit to exesive on a engine that already has pretty thin cylinder walls. If your going to boost your going to need as much cylinder wall as you can get. If you really want to make big power nothing beat the 03-04 cobra blocks(only blocks I trust) with a termi crank, manley rods and pistons you'll have a shortblock that will handle anything you can throw at it.
__________________
BBK cai, 96 tbird maf housing, BBK 70mm TB, TFS intake manifold, BBK shortys, bassani off road X pipe, Flowmasters with turndowns

If any one is willing to donate parts to the Make Joe's Mustang Faster that Corvettes Foundation, donations will be gladly appreciated
Stockish302 is offline   Reply With Quote
Old 05-21-2012, 10:36 PM   #34
Registered Member
Regular
 
t0t4lbl4ck0ut's Avatar
 
Join Date: May 2011
Posts: 711
You know a terminator block is the same as cast iron gt block and your not boring 2-3 tenths, your going hundredths .020 not .20 unless your planning on going to a 5.0 big bore which you can do safely.
t0t4lbl4ck0ut is offline   Reply With Quote
Old 05-21-2012, 10:38 PM   #35
Registered Member
Regular
 
Mile high JDF's Avatar
 
Join Date: Jun 2011
Location: Thronton
Region: Colorado
Posts: 5,989
Quote:
Originally Posted by Sonicblue11

Now how would you up the compression? While your telling me all this I'm learning as we go haha
You bump it up a couple different ways: you can mill the deck on your block, get the smaller cc TFS heads, or get domed pistons. Any one of those will bump up compression, assuming you keep the same size head gasket if you mill the deck.
__________________
Sold - Black 2000 Mustang GT, gone but definitely not forgotten
- Silver 2007 Corvette
Current - DHG 2001 Bullitt
Mile high JDF is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



07:19 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.