2010 Roush 427R poor dyno results
10/1/13, 11:20 PM
#1
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2010 Roush 427R poor dyno results
Hi there
I recently purchased 2010 Roush 427R.
It's a 4.6 v8 3v motor with roush m90 supercharger.
6lb boost. Has 28xxx miles.
Roush claims it's 435HP. And to my knowledge after reading people comments on different forums, on bone stock it's around 375 to 385. Depending on conditions.
Now I was planning to get things done to it as any other guy would want to upgrade lol. I got all the parts and did a pre run on dyno to get numbers for before and after comparison.
I was shocked to see my car is only pushing 314horse with 279 torque first run and 313 second run.
That's less then what my previous 08GT was giving with just aftermarket headers.
What are your suggestions on it. Is it something wrong with the tune? The problem with dyno or it's operator ? Or something wrong with the motor.
Ohh btw the results are from dynojet. And when he was doing the dyno I was really low on fuel. Could that be a reason ?
Also I would like to say that 2 days back. I raced a 04 m3. He had bolton done it. I was dead even at 1/4 miles from dig. So I don't think so a 313 hp car can keep up with m3 on boltons.
Would appreciate your thoughts on it.
I recently purchased 2010 Roush 427R.
It's a 4.6 v8 3v motor with roush m90 supercharger.
6lb boost. Has 28xxx miles.
Roush claims it's 435HP. And to my knowledge after reading people comments on different forums, on bone stock it's around 375 to 385. Depending on conditions.
Now I was planning to get things done to it as any other guy would want to upgrade lol. I got all the parts and did a pre run on dyno to get numbers for before and after comparison.
I was shocked to see my car is only pushing 314horse with 279 torque first run and 313 second run.
That's less then what my previous 08GT was giving with just aftermarket headers.
What are your suggestions on it. Is it something wrong with the tune? The problem with dyno or it's operator ? Or something wrong with the motor.
Ohh btw the results are from dynojet. And when he was doing the dyno I was really low on fuel. Could that be a reason ?
Also I would like to say that 2 days back. I raced a 04 m3. He had bolton done it. I was dead even at 1/4 miles from dig. So I don't think so a 313 hp car can keep up with m3 on boltons.
Would appreciate your thoughts on it.
Last edited by Encardyle; 10/1/13 at 11:29 PM.
10/4/13, 07:44 AM
#3
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Yeah try another dyno. Friend of mine's father had one and put 381 down stock. Unless something is absolutely wrong with your car, I'd try another dyne shop to be certain
10/4/13, 05:08 PM
#4
GTR Member
Yeah, should be better than 314, quite a few I've seen have been in the 350 range.
Maybe a dyno issue but of course could be something else.
Do you have a boost gauge and an A/F gauge? What are the numbers?
Maybe a dyno issue but of course could be something else.
Do you have a boost gauge and an A/F gauge? What are the numbers?
10/4/13, 07:25 PM
#5
Hi there
I recently purchased 2010 Roush 427R.
It's a 4.6 v8 3v motor with roush m90 supercharger.
6lb boost. Has 28xxx miles.
Roush claims it's 435HP. And to my knowledge after reading people comments on different forums, on bone stock it's around 375 to 385. Depending on conditions.
Now I was planning to get things done to it as any other guy would want to upgrade lol. I got all the parts and did a pre run on dyno to get numbers for before and after comparison.
I was shocked to see my car is only pushing 314horse with 279 torque first run and 313 second run.
That's less then what my previous 08GT was giving with just aftermarket headers.
What are your suggestions on it. Is it something wrong with the tune? The problem with dyno or it's operator ? Or something wrong with the motor.
Ohh btw the results are from dynojet. And when he was doing the dyno I was really low on fuel. Could that be a reason ?
Also I would like to say that 2 days back. I raced a 04 m3. He had bolton done it. I was dead even at 1/4 miles from dig. So I don't think so a 313 hp car can keep up with m3 on boltons.
Would appreciate your thoughts on it.
I recently purchased 2010 Roush 427R.
It's a 4.6 v8 3v motor with roush m90 supercharger.
6lb boost. Has 28xxx miles.
Roush claims it's 435HP. And to my knowledge after reading people comments on different forums, on bone stock it's around 375 to 385. Depending on conditions.
Now I was planning to get things done to it as any other guy would want to upgrade lol. I got all the parts and did a pre run on dyno to get numbers for before and after comparison.
I was shocked to see my car is only pushing 314horse with 279 torque first run and 313 second run.
That's less then what my previous 08GT was giving with just aftermarket headers.
What are your suggestions on it. Is it something wrong with the tune? The problem with dyno or it's operator ? Or something wrong with the motor.
Ohh btw the results are from dynojet. And when he was doing the dyno I was really low on fuel. Could that be a reason ?
Also I would like to say that 2 days back. I raced a 04 m3. He had bolton done it. I was dead even at 1/4 miles from dig. So I don't think so a 313 hp car can keep up with m3 on boltons.
Would appreciate your thoughts on it.
10/5/13, 05:12 AM
#7
I Have No Life
10/5/13, 07:49 AM
#8
GTR Member
Could be an old belt causing lots of slip, could be something else, that's why I was asking about gauges so we might have a little more insight into the conditions.
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