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03-05-2010, 05:21 AM
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CC Member
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Join Date: Dec 2001
Cobra Make, Engine: BDR
Posts: 536
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Not Ranked
Quote:
Originally Posted by Keithc8
How can you sell engines that are suppose to make 550HP and that is what they are advertised at but they do not make that. If I was paying the extra price for the Roush name I would at least want the engine to make what they advertise it at. They use the same parts as everyone else.
I do not think it is anything with the engine and more than likely an electrical or fuel problem on the car.
Good Luck, Keith
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If you look at the Roush Performance site here http://www.roushperformance.com/engines/engines.shtml
You will see the word Maximum, the 427R has a rating of a maximum of 550hp which to me means up to.
The 427SR/TW has a maximum of 515 HP mine dyno'd at 507 I am not irritated about 8hp .  |
03-05-2010, 04:59 AM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
So this has only happened once? Have you been able to recreate the problem since? I'd toss the MSD box. They are complete junk. If it hasn't failed on you yet, it will.
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03-05-2010, 06:11 AM
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CC Member
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Join Date: Jun 2005
Cobra Make, Engine:
Posts: 3,077
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Not Ranked
Most know you can play with timing and other engine adjustments to get the horspower reading you want, needless to say some affect engine longevity. The SR is 480HP, SRTW is 515 and the torqueless R is 550 hp. mine dynoed at 522 hp so I guess I got the bonus plan with an extra 7 hp. Oh wait maybe the dynoed mine on a cold day or a dry day. Dyno numbers at best are within 10%
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03-07-2010, 08:21 AM
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CC Member
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Join Date: Aug 2002
Location: Richmond,
VA
Cobra Make, Engine: Superformance Mk III / Windsor platform
Posts: 450
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Not Ranked
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03-05-2010, 09:12 AM
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CC Member
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Join Date: Jan 2005
Cobra Make, Engine:
Posts: 7
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Not Ranked
Sorry for the delayed response. The problem was a crimped fuel line. Car is running great. BTW, my engine is the 427R version with "550 hp". On the card that came with the motor, it says 524hp. We had it dyno'd and it showed 465hp at the rear. A few people have recommended chainging the carb to the pro system setup. Has anyone done this? They say it makes the car run smoother and adds HP. My only concern is voiding the roush warranty.
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03-05-2010, 09:32 AM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Santa Cruz,
CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
Posts: 4,098
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Not Ranked
Quote:
Originally Posted by blkasp2
Sorry for the delayed response. The problem was a crimped fuel line. Car is running great. BTW, my engine is the 427R version with "550 hp". On the card that came with the motor, it says 524hp. We had it dyno'd and it showed 465hp at the rear. A few people have recommended chainging the carb to the pro system setup. Has anyone done this? They say it makes the car run smoother and adds HP. My only concern is voiding the roush warranty.
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If it's running good, drive it for a while. 465 hp will get you down the road just fine. 
You can always swap out the carb after the engine is out of warranty.
__________________
Doug
No stop signs, speed limit - Nobody's gonna slow me down - Like a wheel, gonna spin it
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03-05-2010, 01:36 PM
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CC Member
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Join Date: Jun 2005
Cobra Make, Engine:
Posts: 3,077
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Not Ranked
Something is quirky that is only a 11% powertrain loss. You must have magnetic air bearings. Most powertrain losses are 15 to 20%. 550hp*20% -550 = 440hp. so even at 15% powertrain loss 467 hp where is where you are at the rear wheels. I would contact roush is it is only 524hp with the "r" engine. I have never seen one that low but is very close to the sr. Did you call Roush 1-800-59roush and ask them to email the dyno sheet. The engine s/n and r,sr,sr/tw will be at the top. The little tag hanging from the distributor that indicates hp and oil pressure does not indicate which "r" version.
Quote:
Originally Posted by blkasp2
Sorry for the delayed response. The problem was a crimped fuel line. Car is running great. BTW, my engine is the 427R version with "550 hp". On the card that came with the motor, it says 524hp. We had it dyno'd and it showed 465hp at the rear. A few people have recommended chainging the carb to the pro system setup. Has anyone done this? They say it makes the car run smoother and adds HP. My only concern is voiding the roush warranty.
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03-07-2010, 10:22 PM
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CC Member
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Join Date: Nov 2006
Location: Sammamish,
WA
Cobra Make, Engine: Superformance #2743, Roush 427SR
Posts: 130
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Not Ranked
I test drove SPF with a 427R. It died after about 3 blocks. The mechanical choke, which had no attached cable, was engaged. Don't think it could be this simple but why not check.
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03-08-2010, 03:17 PM
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CC Member
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Join Date: Jan 2010
Location: so san francisco,
ca
Cobra Make, Engine: NAF 1965 427 bodied w/Clevland 351 bored 60 over toploader 4 speed White and grey stripes
Posts: 62
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Not Ranked
Sounds like a vaccum lock in fuel system which means that fuel will flow to pump until tank runs out of air due to no tank vent in fuel tank fuel will then stop flowing and shut off motor. also you need to check ignition that ignition moduel isnt over heating and shutting off spark to plugs.loosen fuel cap or leave it open and drive car if it dosent stall then you have found problem no fuel no go.
Good Luck Larry Spillman A Happy Cobra owner/
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03-08-2010, 03:50 PM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
Sounds like a crimped fuel line.  |
03-08-2010, 05:12 PM
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Backdraft Racing Dealer
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Join Date: Dec 2004
Location: North Haven,
CT
Cobra Make, Engine: Backdraft Racing
Posts: 5,124
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Not Ranked
Quote:
Originally Posted by TButtrick
Sounds like a crimped fuel line. |
Yeah, he should sue...  |
03-08-2010, 05:23 PM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
yikes. I only posted that because people were still responding with remedies when he already responded with the cause. Now I'm guessing the engine was in a BDR?
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03-08-2010, 05:32 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Maybe he's got the fins on his waterpump backwards.  |
03-08-2010, 05:43 PM
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Backdraft Racing Dealer
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Join Date: Dec 2004
Location: North Haven,
CT
Cobra Make, Engine: Backdraft Racing
Posts: 5,124
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Not Ranked
Quote:
Originally Posted by TButtrick
yikes. I only posted that because people were still responding with remedies when he already responded with the cause. Now I'm guessing the engine was in a BDR?
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I was making fun of another late to the game post on another thread. It pays to read all the replies before posting  |
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