Welcome to Mustang Evolution.
|
  |
|
|
|
08-03-2006, 12:35 AM
|
#1
|
|
  |
|
power limit on a 99 cobra?
|
|
No more obstacles
Join Date: Jul 2005
City: Marin County, Nor Cal
State: California
Posts: 893
|
I've researched other discussions and forums but can't come up with a definite answer yet. Some guys say that the cobra motors are bulit proof and some companies say to only run between 5-8 psi on them for longevity purposes.
Now how come a V6 can handle 10 psi all day with a good tune and still last a long time, but a 4v motor with forged crank seems restricted on how much boost it can take?
I've heard 500hp is a reasonable limit, but I don't build engines so I don't know if it's true or just what people have said and others pick up on that.
I want to know what a 99 motor can take and not an 03-04?
Any educated opinons out there?
__________________
99 Cobra: flowmasters, 18x9.5 cobra R's, soon to be tuned and geared. daily driver
99 V6:in avatar, Mac Cai, true duals/flowmaster 40's ,UDP, custom tuned, bullitt suspension 18" wheels...taken by mother nature 
|
|
|
|
 
|
08-03-2006, 07:59 AM
|
#2
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Christian & proud of it
Join Date: Jun 2004
City: La Vernia
State: Texas
Posts: 2,400
|
the block is alot weaker than the 96-98 teskin(sp) block since the block and crank are both forged in my car that block will handle about 1000 HP don't know about the crank, but the pistons and rods are the weak spot.
AND the 99 cobras came with a weak ass 28slpine IRS that certainly can't help
__________________
"The LORD shall judge the people:judge me, O Lord, according to my righteousness, and according to mine integrity that is in me." PSALM 7:8
In Texas? check out www.lonestarstangs.com
|
|
|
|
|
|
08-03-2006, 03:23 PM
|
#3
|
|
|
|
Re: power limit on a 99 cobra?
|
|
WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,240
|
most dont seem to run over 8-10 psi on them for daily use~ What is their compression ratio compared to the v6?
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
|
|
|
|
|
|
08-03-2006, 04:20 PM
|
#4
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Christian & proud of it
Join Date: Jun 2004
City: La Vernia
State: Texas
Posts: 2,400
|
__________________
"The LORD shall judge the people:judge me, O Lord, according to my righteousness, and according to mine integrity that is in me." PSALM 7:8
In Texas? check out www.lonestarstangs.com
|
|
|
|
|
|
08-03-2006, 04:45 PM
|
#5
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Teh TC6!
Join Date: Aug 2005
City: Sheppard AFB
State: Texas
Posts: 3,972
|
Good Lord. I'm surprised they can run that much pressure with that level of compression.
__________________
Click the sig for a complete list of mods and pics.
Bewst!? 
|
|
|
|
|
|
08-03-2006, 04:57 PM
|
#6
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Christian & proud of it
Join Date: Jun 2004
City: La Vernia
State: Texas
Posts: 2,400
|
^thats why its sooo low, but the forged block and crank make up for SOME of it, i WILL be running forged pistons, rods and low low compression on my motor build if it ever gets started(KB 2.1 with a custom intercooler)
__________________
"The LORD shall judge the people:judge me, O Lord, according to my righteousness, and according to mine integrity that is in me." PSALM 7:8
In Texas? check out www.lonestarstangs.com
|
|
|
|
|
|
08-03-2006, 05:19 PM
|
#7
|
|
|
|
Re: power limit on a 99 cobra?
|
|
postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,353
|
My friend with a 98 is pushing 11psi on a vortec, stock engine...well..stock rebuild. Nitrous claimed two rods...
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
|
|
|
|
|
|
08-03-2006, 05:42 PM
|
#8
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Christian & proud of it
Join Date: Jun 2004
City: La Vernia
State: Texas
Posts: 2,400
|
^nice, but i'm going with wildly ported heads and wild cams, i need to buy a beater 1st
__________________
"The LORD shall judge the people:judge me, O Lord, according to my righteousness, and according to mine integrity that is in me." PSALM 7:8
In Texas? check out www.lonestarstangs.com
|
|
|
|
|
|
08-04-2006, 08:11 AM
|
#9
|
|
|
|
Re: power limit on a 99 cobra?
|
|
WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,240
|
my compression is around 8.5 
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
|
|
|
|
|
|
08-04-2006, 10:17 AM
|
#10
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Teh TC6!
Join Date: Aug 2005
City: Sheppard AFB
State: Texas
Posts: 3,972
|
So you've been told... 
__________________
Click the sig for a complete list of mods and pics.
Bewst!?
|
|
|
|
|
|
08-17-2006, 08:53 PM
|
#11
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Registered User
Join Date: Jul 2003
Posts: 254
|
I think you can make 375-425 and live for a while with a good tune.
__________________
Justin Starkey
2007 Shelby GT500 705RWHP/708RWTQ
2000 Mustang 3.8 A4 TT 450RWHP/475RWTQ 10.996@127 17psi stock 3.8
2006 F250 CC 4x4 6.0L 14.3 @ 93
2006 Mustang 4.0 M5 Vortech 13psi 395RWHP/374RWTQ wife's car
|
|
|
|
|
|
08-17-2006, 11:34 PM
|
#12
|
|
|
|
Re: power limit on a 99 cobra?
|
|
No more obstacles
Join Date: Jul 2005
City: Marin County, Nor Cal
State: California
Posts: 893
|
Is that at the crank or the wheels? Justin do you tune 4v 4.6 or mainly 6's?
__________________
99 Cobra: flowmasters, 18x9.5 cobra R's, soon to be tuned and geared. daily driver
99 V6:in avatar, Mac Cai, true duals/flowmaster 40's ,UDP, custom tuned, bullitt suspension 18" wheels...taken by mother nature
|
|
|
|
|
|
08-18-2006, 12:14 PM
|
#13
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Registered User
Join Date: Jul 2003
Posts: 254
|
I tune everything. Thats at the wheels.
__________________
Justin Starkey
2007 Shelby GT500 705RWHP/708RWTQ
2000 Mustang 3.8 A4 TT 450RWHP/475RWTQ 10.996@127 17psi stock 3.8
2006 F250 CC 4x4 6.0L 14.3 @ 93
2006 Mustang 4.0 M5 Vortech 13psi 395RWHP/374RWTQ wife's car
|
|
|
|
|
|
08-18-2006, 12:31 PM
|
#14
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Taking life one day at a time
Join Date: May 2003
City: Simpsonville
State: South Carolina
Posts: 10,970
|
3.8 & 4.2 Block is steel
4.6 GT and Cobra block are Aluminum
03/04 4.6 Cobra block is Steel
Aluminum can be made to be as strong as steal with either the right heat treat or the proper aluminum alloy mixture. The peoblem is either way of making a aluminum block stronger is way more expensive than steel and marginally more expensive than a normal aluminum block.
__________________
Last edited by Danger Dude; 08-18-2006 at 12:34 PM.
|
|
|
|
|
|
08-18-2006, 02:15 PM
|
#15
|
|
|
|
Re: power limit on a 99 cobra?
|
|
No more obstacles
Join Date: Jul 2005
City: Marin County, Nor Cal
State: California
Posts: 893
|
well I know the wap block doesn't have as much webing as the teskin block so I guess that's why it's the weaker of the two. I'm just worried since so many guys over at svtperformance have blown up or dammaged a few stock motors with really low mileage.
Since mine is a DD I have to be nice to it. I think i'll just try to make as much power possible NA until I can afford to break something.
__________________
99 Cobra: flowmasters, 18x9.5 cobra R's, soon to be tuned and geared. daily driver
99 V6:in avatar, Mac Cai, true duals/flowmaster 40's ,UDP, custom tuned, bullitt suspension 18" wheels...taken by mother nature
|
|
|
|
|
|
08-18-2006, 02:44 PM
|
#16
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Imma Ho...
Join Date: Aug 2004
City: Baton Rouge
State: Louisiana
Posts: 10,066
|
Just as an FYI and to clarify the (sp?) above....it is teksid. 
And if you know of someone with one for sale...let me know.  I would love a nice teksid aluminum stroker in my car.
__________________
|
|
|
|
|
|
08-20-2006, 11:02 PM
|
#17
|
|
|
|
Re: power limit on a 99 cobra?
|
|
milf hunter
Join Date: Apr 2005
City: Baton Rouge
State: Louisiana
Posts: 5,179
|
b/c he sure as hell cant go by field testing.......i bet that needle wont even shoot up when he hits it..........its so used to being on 0 that its probably stuck there
__________________
|
|
|
|
|
|
08-21-2006, 07:06 AM
|
#18
|
|
|
|
Re: power limit on a 99 cobra?
|
|
Bob is Good.
Join Date: Jun 2004
City: Greenville
State: Texas
Posts: 5,208
|
Spector has a compression ratio guage??? And he's been driving around with no compression???  |
|
|
|
|
|
