|
Author
|
Topic: Max./Safe HP for 04 cobra??????
|
throckman69
¯
Member # 6511
|
posted
 
 
I have an 04 cobra w/all the bolt ons you can get. I am doing a KB 2.4 upgrade and am courios as to what is really a safe(if there is such a thing) power range for the cobra bottom end. I am shooting for 600 rwhp. would love more but not quite sure if it's good for the motor. Right now I have steeda CIA,full bassani exhaust,SCT chip and tune,and accufab throttle body to help out the new KB.
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
93PONY
Mr. Valve Events
Member # 60
|
posted
I just tuned a buddies KB 03 Cobra to 683RWHP (STD) & 623RWTQ. (stock shortblock)
I'd recomend a Whipple over a KB. They seem to make a LOT more torque down low. (55+ with the same boost/bolt-ons)
Also remember to upgrade your fuel system.
I just tried a few things on the above 03 & was able to squeeze out that power with stock pumps/lines/rails. KB BAP, wiring upgrade, 60lb injectors, & opening up the systems restrictions.
The 03/04 motors can handle 600RWHP no problem.....assuming a safe tune.
--------------------
www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
| :
|
|
throckman69
¯
Member # 6511
|
posted
wow that's bad ass. I am planning on Apex do the work for me. I am just not rich. I can afford the KB but not a blown motor shortly after. Did you beef up the clutch? and How about the rear end? the more info the better I feel about doing this. I am both excited and nervous. thanks for sharing info w/ me
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
stangless
¯
Member # 1414
|
posted
,.
[ March 03, 2006, 11:36 PM: Message edited by: Jmir018 ]
--------------------
=(
Posts: 4634 | From: bay | Registered: Jun 2002
| :
|
|
throckman69
¯
Member # 6511
|
posted
hey 93pony, did you use KB's tune or do your own?
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
JohnB
Tech Moderator
Member # 969
|
posted
You can have all the RWHP in the world but it doesn't mean squat unless you can get it to the pavement. The weak link in the 03-04's is the IRS. Anything on DR's or slicks, you're asking for trouble...even with just a pulley and filter. Unless of course you just want a dyno-queen, then you'll be just fine. ![[Big Grin]](biggrin.gif)
--------------------
1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
| :
|
|
jayl
¯
Member # 185
|
posted
not always johnB, my buddys gone 11.90@119 w/437 rwhp about a million times on nittos cutting 1.80s and never had any issues so far......i think its a lot of the idiots that stay on it through the wheel hop that kills them everytime!
--------------------
Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
| :
|
|
1sick65
¯
Member # 3957
|
posted
chinis whipple 04 with stock IRS and a slipping clutch ran a 11.2 last weekend........?
Posts: 1457 | From: Sacramento,CA | Registered: Jan 2004
| :
|
|
throckman69
¯
Member # 6511
|
posted
so say i get my hp that I want. and john b says the irs is my weak link. Is there anyone who makes parts for the IRS to beef it up. Or is it not worth it. Ford must have put it in there for a reason, right? Keep the info coming I appreciate it guys.
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
JohnB
Tech Moderator
Member # 969
|
posted
Ok, 430ish RWHP and 600+ is a big difference. I didn't say it will blow up on the first pass, but you are on borrowed time. If you're going to do it, why not do it right the first time? Everyone has a buddy or friend that has ran the piss outta their car, still drives it daily, and has no problems. But what do I know, I just fix them. ![[Wink]](wink.gif)
There are several companies such as Billetflow that make upgrade parts for the IRS. As a minimum, I'd install a front and rear IRS brace, solid bushings both front and rear, and upgraded half-shafts if you are indeed going to run 600+.
--------------------
1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
| :
|
|
throckman69
¯
Member # 6511
|
posted
right on john b. I do have the rear irs brace already. I am no car guru so bear with me. What exactly is the weak link in the irs rear end. I haven't checked yet but billetflow makes upgrade parts that can handle the punishment of 600+ hp. I won't be tracking it soon. just play with it on the streets for a while. While I save for a new clutch/flywheel. I am sure that will be next.
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
JohnB
Tech Moderator
Member # 969
|
posted
What is the weak link IN the IRS?
The IRS Housing. It will go first. Anywhere there is a rubber mount attached. There are two in the front, on the snout of the housing. There is one on the rear (the Brace bolts to it with the two 15mm bolts). ANY serious flex, these will break. After both of these weak areas are corrected, the only other thing is the half-shafts.
--------------------
1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
| :
|
|
throckman69
¯
Member # 6511
|
posted
I am getting it now. I just went to the billetflow website, but didn't see any half shafts. I saw those irs subframe brackets. Are those the fronts you were talking about? Hey John B thanks man. How do you know so much about all this. I am googling half shafts now.lol
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
JohnB
Tech Moderator
Member # 969
|
posted
I know there are halfshafts that are deemed "Level 10" but I don't remember who they are made by.
I've pulled just a few rear ends apart.
--------------------
1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
| :
|
|
93PONY
Mr. Valve Events
Member # 60
|
posted
IRS is heavy & weak. I'd advise a solid rear end swap if this is a street/strip setup. If it's a roadrace, then you'll probably do better with an IRS.
The IRS is at least 100lbs heavier than a beefed up solid rear end.
Clutch will definately need to be upgraded.
Apex has access to excellent clutches, but they come at a high cost. You can get a VERY good clutch from ProMotion (700hp capable) for around $400. I'd also recomend getting a 26 spline input shaft for the transmission at the same time. It's 50% thicker just after the splines than the stock 10 spline shaft.....which have a tendancy to break from time to time.
The tunes I do are custom. KB's tunes are not ideal. They add/subract timing/fuel based on ACT temps.....with BIG swings from temp to temp. Plus, every car is different, so tunes will be different from car to car.
--------------------
www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
| :
|
|
mustanggt5091
All I need is.....
Member # 444
|
posted
quote:
Originally posted by throckman69:
Hey John B thanks man. How do you know so much about all this.
Because hes the man and doing side jobs on stangs for a long time
--------------------
88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
| :
|
|
stangless
¯
Member # 1414
|
posted
you are getting a lot of great info here, but i would also check svtperformance.com that forum is inhabited by some majorly modded cobras. they should be able to give you some info so you can make up your mind on which direction to go.
I had a cobra, never broke a halfshaft but i'm sure it was on borrowed time, was i to get another one again, i would get just get a solid axle.
you can upgrades halfshafts ($1500), bushings($800 or more w/ installation and aligment after)clutches, braces etc etc and it might still brake.
i guess it's about what you want to do with the car. will you even be going to the dragstrip often? if not, there is no real need for you to worry.
good luck and post some pics of your cobra (i was gonna say snake, but that sounded funny )
--------------------
=(
Posts: 4634 | From: bay | Registered: Jun 2002
| :
|
|
stangless
¯
Member # 1414
|
posted
quote:
Originally posted by jayl:
not always johnB, my buddys gone 11.90@119 w/437 rwhp about a million times on nittos cutting 1.80s and never had any issues so far......i think its a lot of the idiots that stay on it through the wheel hop that kills them everytime!
not to be a dick or anything, but those numbers are not all that impressive.. a friend of mine goes 11.60s@116 consistently with 1.6s on the stock irs. I'm sure if your friend would start getting those numbers he would start suffering some repercussions too. some cobras just snap the halfshaft without any wheelhop by just launching the thing to hard.
--------------------
=(
Posts: 4634 | From: bay | Registered: Jun 2002
| :
|
|
JohnB
Tech Moderator
Member # 969
|
posted
Definitely check out SVTPerformance. A TON of knowledge over there!! ![[patriot]](graemlins/patriot.gif)
Think long and hard about what your goals are for the car. Be realistic. Just remember, for every action there is a equal and opposite reaction. Mod the engine? Other items *may* fail. Keep it all in perspective...
--------------------
1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
| :
|
|
jayl
¯
Member # 185
|
posted
quote:
Originally posted by Jmir018:
quote:
Originally posted by jayl:
not always johnB, my buddys gone 11.90@119 w/437 rwhp about a million times on nittos cutting 1.80s and never had any issues so far......i think its a lot of the idiots that stay on it through the wheel hop that kills them everytime!
not to be a dick or anything, but those numbers are not all that impressive.. a friend of mine goes 11.60s@116 consistently with 1.6s on the stock irs. I'm sure if your friend would start getting those numbers he would start suffering some repercussions too. some cobras just snap the halfshaft without any wheelhop by just launching the thing to hard.
never said they were impressive, but the car is street raced almost every weekend......and no problems.....i was just giving an example, and the power level is now 495rwhp.....But its all irrelevant now that a solid rear and twin snails are in boxes!!! but i am glad your friend runs 11.60@116.....its good to see those cars et'ing well for the traps!
--------------------
Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
| :
|
|
throckman69
¯
Member # 6511
|
posted
Great info guy's. thanks much. I will stick with the KB upgrade. Then my next thing to save for will be the rear end. I wish I could jump right into the track scene but my wallet isn't that deep it seems compared to some of the other guys around here. I'll see if I can behave with the new power until I can afford to get on it hard enough to be able to pay for more upgrades/repairs. I'm gonna get all the parts for the KB ordered next week. I have been talking to Ed@Apex. He say's like 3 weeks for the blower and then 2-3 days for install/tune. I can't wait
Posts: 27 | From: campbell, CA | Registered: Feb 2006
| :
|
|
stangless
¯
Member # 1414
|
posted
good luck, enjoy your new power.
--------------------
=(
Posts: 4634 | From: bay | Registered: Jun 2002
| :
|
|
jayl
¯
Member # 185
|
posted
another friend of ours made 610rwhp w/ a KB setup on 19psi......very very fun ride! i got some video from the in the car, racin some pullied 03/04s/ and some ls1s......fun shit, crazy torque at extremely low rpms!
--------------------
Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
| :
|
|
stangless
¯
Member # 1414
|
posted
damn. post the vid up. that thing must be fun to drive!!
--------------------
=(
Posts: 4634 | From: bay | Registered: Jun 2002
| :
|
|
jayl
¯
Member # 185
|
posted
ill try to get my generic converter to work again.....that car was sick as fuck! makes a "tad" bit more power now! boost without a belt! i should put up some vids w/ KB then after vids w/ 76 GTS
--------------------
Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
| :
|
|
Email this post to someone!
Printer friendly view of this Ford topic
