Boss 302 Push Rod Motor Build - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs

Join Mustang Evolution Today


Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 09-24-2016, 04:56 PM   #1
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
Boss 302 Push Rod Motor Build

To start this thread off I have been asked to help build a push rod Boss 302 to be installed in 1970 Trans AM Mustang. The Mustang will be built to pre 1972 Trans AM specs although there will be some modifications to the chassis and drive train to bring it up to current vintage racing standards. As I stated in an earlier post the 302 will be somewhere in the 310/318ci range and must be in the 550/600hp range...at the crank. We are still in the beginning stages of selecting parts and putting a budget together. The budget for the motor has not be totally worked out although it will be beween $20/25k. Since this is motor is going to shoot for the moon most of the internal parts will be custom made such as the crank/rod/pistons/cam which is the reason the cost is so high.
I know from past experience that a Boss 302 push rod motor can make 500hp with nothing more than a blue print, different cam and headers...my ole 70 Maverick had a similar motor in it when running NHRA B/SM some 36 years ago and was turning 10.30's in the 1/4 mile...3100lb car/4spd Liberty with 5.13 gears. I'm very confident that with a set of CHI heads a 302 can make 550hp. So we'll see if it can make close to 600hp and live for a full season of racing!?

I'm starting this thread for a couple of reasons, one is that there has been interest in seeing a push rod 302 built and the other is to show some of "blue printing" that goes into building a full on race motor...which can also be accomplished on any motor which will improve the longevity of any motor. We will also be choosing components, machining for clearances, the proper way to set up a push rod valve train, how to use a degree wheel to check valve timing, and assembling a motor along with how and why to use an engine dyno.

This motor was built long before a lot of you were born...first question is how many know what this is...without searching google or any website?
Attached Thumbnails
Click image for larger version

Name:	Cross_Boss_009.jpg
Views:	52
Size:	35.8 KB
ID:	205258  
olerodder is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-25-2016, 03:46 PM   #2
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 6,750
Mechanical fuel injection.
Not sure of the manufacturer though... That would require some googling! Lol.

What kind of fuel will this engine be running on?
straybullitt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-25-2016, 08:06 PM   #3
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
It's a 4 barrel carb built by Autolite specifically for the Boss 302. Trans AM rules specify you have to run a OE carb although they did not limit the CFM and this one flows almost 1400cfm. With the manifold they were called the Cross Boss and today if you can find one for sale they are in the $7000/$10000 range.
The motor will run VP110.
Attached Thumbnails
Click image for larger version

Name:	CrossBoss.jpg
Views:	45
Size:	72.2 KB
ID:	205266  
olerodder is offline   Reply With Quote
Old 09-25-2016, 08:33 PM   #4
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 6,750
I was positive that it was mechanical fuel injection... Are you sure???


Lol.
I do recall seeing those carburetors, in magazines, years ago. Holy crap! An Autolite!
Here's one for sale. Doesn't seem like a bad price... Providing it isn't a scam, of course.
http://aberdeen.craigslist.co.uk/ptd...?lang=en&cc=us

Sent from my SAMSUNG-SGH-I747 using Mustang Evolution mobile app
straybullitt is offline   Reply With Quote
Old 09-25-2016, 08:48 PM   #5
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
To paraphrase you...Holy Crap you actually found this on Craigslist in the UK.
If it's not a scam it could be the buy of life time...even if it's missing the original air cleaner.
I sent the person an email...guess we'll find out, thanks!
olerodder is offline   Reply With Quote
Old 09-26-2016, 01:48 PM   #6
Registered Member
Regular
 
Scott2's Avatar
 
Join Date: Nov 2009
Location: King City, Ontario
Region: Canada
Posts: 345
Good luck with the build John! In for the ride.

Ran a Boss 302 in a 65 Comet in G/Gas and was building a Boss 302 Maverick for B/SM until NHRA drooped the class. Still have a Boss 302 70 Mustang that needs some TLC. Hope to get working on it one of these days.

__________________


MOTM winner May 2015 "Best mods Mustang". Please View my Garage for complete details on modifications.
Scott2 is offline   Reply With Quote
Old 10-14-2016, 11:05 PM   #7
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
Sorry it's been so long between posts...starting from scratch just takes a lot of leg work.
I can say right now that there are some real gray areas as to how this motor should be built to "factory specs".?!
Got the funding to purchase the block, heads, crank, rods and pistons.
OEM Boss 302 block, have been corresponding with Scott at CHI talking about heads, Crower on the crank, Cunningham on the rods and Probe and Ross regarding the pistons.
Attached Thumbnails
Click image for larger version

Name:	Boss 302 in a crate.jpg
Views:	31
Size:	251.6 KB
ID:	205693  
olerodder is offline   Reply With Quote
Old 10-15-2016, 06:28 AM   #8
Registered Member
Regular
 
audioAl's Avatar
 
Join Date: Jun 2012
Region: Texas
Posts: 580
Interesting thread, I knew the photo was a carb but am not very familiar with the Boss spec. motor, I'll troll along with the updates here, fun times.
__________________
2014 DIB 3.7 "Blue Cyclone" on 275/40/18 RE 760 Sports/Sold
2016 ruby red GT 300 A with 3.55:1 gear/SVE resonator delete X-pipe/ UPR catch can/Airaid/AEM/J&M sub frame alignment kit/ BMR cradle lockout/
audioAl is offline   Reply With Quote
Old 10-18-2016, 03:54 PM   #9
Registered Member
Regular
 
fstbck70's Avatar
 
Join Date: Sep 2014
Location: Omaha
Region: Nebraska
Posts: 113
Quote:
Originally Posted by olerodder View Post
Sorry it's been so long between posts...starting from scratch just takes a lot of leg work.

I can say right now that there are some real gray areas as to how this motor should be built to "factory specs".?!

Got the funding to purchase the block, heads, crank, rods and pistons.

OEM Boss 302 block, have been corresponding with Scott at CHI talking about heads, Crower on the crank, Cunningham on the rods and Probe and Ross regarding the pistons.



I think I'm speaking for everyone here, so when are you gonna open that present?


Sent from my iPhone using Mustang SRCaADDz(:53
fstbck70 is offline   Reply With Quote
Old 10-18-2016, 04:18 PM   #10
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
Just waiting for some dry weather to head down south and bring it home in the pickup...Haven't you heard the NorthWest has been hit with storm after storm...etc. As Aristotle once said, "Patience is bitter, but its fruit is sweet", or something like that.
Attached Thumbnails
Click image for larger version

Name:	Boss 302 bare block.jpg
Views:	24
Size:	50.0 KB
ID:	205758  
olerodder is offline   Reply With Quote
Old 10-18-2016, 05:01 PM   #11
Registered Member
Regular
 
fstbck70's Avatar
 
Join Date: Sep 2014
Location: Omaha
Region: Nebraska
Posts: 113
Such a tease haha. Do you want me to send you a tarp?


Sent from my iPhone using Mustang SRCaADDz(:53
fstbck70 is offline   Reply With Quote
Old 10-18-2016, 05:09 PM   #12
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
Sure, buy the time the tarp gets here maybe I'll have more parts....
olerodder is offline   Reply With Quote
Old 11-03-2016, 05:38 PM   #13
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,332
Heads ordered along with rods, pistons and crank.
Just surprising how long it takes to get parts that are custom made...kind of used to buying parts from companies like Summit Racing and getting them within a day or two...not a month or two.
Christmas should be really fun this year.
Attached Thumbnails
Click image for larger version

Name:	Boss 302 still in crate2.jpg
Views:	17
Size:	411.0 KB
ID:	205996  
olerodder is offline   Reply With Quote
Old 11-10-2016, 03:36 AM   #14
Registered Member
Regular
 
ER12883's Avatar
 
Join Date: Aug 2013
Location: Colorado
Region: Colorado
Posts: 669
Waiting for parts is terrible - I suggest moving half way around the world to pass the time. Keep us posted!
ER12883 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
2013 Mustang Boss 302 :: 2013 Ford Boss 302 bvillarreal60 Member Garages 0 05-01-2013 10:09 PM
2v 4.6 vs 5.0 (push rod) stangcobra SVT Mustang 5 03-30-2013 02:35 PM
Push rod question captain78 1979-1995 Mustang GT 4 06-01-2012 12:53 AM
push rod or mod Mustang_Daddy 1996-2004 Mustang GT 10 11-23-2011 09:40 AM

» Like Us On Facebook



03:48 PM


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, 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.