Do U really get this Much HP gain?
09-29-2007, 09:45 PM
#1
Do U really get this Much HP gain?
i saw this on ebay...i was bored and curious how much an srt-4 catback system would cost and i saw this
http://cgi.ebay.com/ebaymotors/Mopar...spagenameZWDVW
Do u really expect to get this much horspower out of an exhasut and downpipe?
http://cgi.ebay.com/ebaymotors/Mopar...spagenameZWDVW
Do u really expect to get this much horspower out of an exhasut and downpipe?
09-30-2007, 01:00 AM
#7
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I had an '88 Nissan Cima Cedric with a VG30DET when I was living in Australia, and I saw a 32hp gain from a turbo-back system and a boost increase from 9 to 12psi...
09-30-2007, 10:16 AM
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I've read the same thing in regards to superchargers and I always would laugh. Supercharged cars see greater gains with and exhaust change than a NA car ever will. Now its gone full circle and I bet money that turbo guys are now saying the same thing in regard against SC cars and NA cars.
But the truth of the matter is simple.
You gain a percentage over stock.
The worse the stock system was, the greater percentage you will gain.
The percentage gained does not change whether is NA, SCed or Turboed.
Example:
2 cars with the same engine, one forced inducted the other NA.
Both had stock systems sized for the particular application, which we know there is a difference.
The NA car makes 200 ponies and the forced inducted one makes 300 ponies.
Since both were made by the same builder, sized accordingly each may see a 10% gain from the exhaust change. NA has now gained 20 ponies and the forced inducted one 30 ponies making 220 and 330 now.
You will not get the NA to only see 5% gains, while the force inducted sees a 15% gain.
If it was the other way around with the NA car built in such a way that it makes more ponies stock than the force inducted one does, the NA car would yield the bigger gains and the turbo one lower. So then you can say the NA one responded better.
So anybody that says BECAUSE ITS FORCE INDUCTED IT RESPONDS BETTER etc etc etc etc etc, well thats not true. The percentage of increase remains the same, always did and always will, but having higher ponies to begin with makes it gain more.
But the truth of the matter is simple.
You gain a percentage over stock.
The worse the stock system was, the greater percentage you will gain.
The percentage gained does not change whether is NA, SCed or Turboed.
Example:
2 cars with the same engine, one forced inducted the other NA.
Both had stock systems sized for the particular application, which we know there is a difference.
The NA car makes 200 ponies and the forced inducted one makes 300 ponies.
Since both were made by the same builder, sized accordingly each may see a 10% gain from the exhaust change. NA has now gained 20 ponies and the forced inducted one 30 ponies making 220 and 330 now.
You will not get the NA to only see 5% gains, while the force inducted sees a 15% gain.
If it was the other way around with the NA car built in such a way that it makes more ponies stock than the force inducted one does, the NA car would yield the bigger gains and the turbo one lower. So then you can say the NA one responded better.
So anybody that says BECAUSE ITS FORCE INDUCTED IT RESPONDS BETTER etc etc etc etc etc, well thats not true. The percentage of increase remains the same, always did and always will, but having higher ponies to begin with makes it gain more.
09-30-2007, 11:16 AM
#12
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a full turbo back exhaust will gain a lot of power.... turbo cars don't need backpressure... plus the SRT-4 dosen't run a muffler... so straight-pipe it from the turbo all the way out... and gain a heck of a lot.
09-30-2007, 05:09 PM
#16
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09-30-2007, 06:57 PM
#17
I've read the same thing in regards to superchargers and I always would laugh. Supercharged cars see greater gains with and exhaust change than a NA car ever will. Now its gone full circle and I bet money that turbo guys are now saying the same thing in regard against SC cars and NA cars.
But the truth of the matter is simple.
You gain a percentage over stock.
The worse the stock system was, the greater percentage you will gain.
The percentage gained does not change whether is NA, SCed or Turboed.
Example:
2 cars with the same engine, one forced inducted the other NA.
Both had stock systems sized for the particular application, which we know there is a difference.
The NA car makes 200 ponies and the forced inducted one makes 300 ponies.
Since both were made by the same builder, sized accordingly each may see a 10% gain from the exhaust change. NA has now gained 20 ponies and the forced inducted one 30 ponies making 220 and 330 now.
You will not get the NA to only see 5% gains, while the force inducted sees a 15% gain.
If it was the other way around with the NA car built in such a way that it makes more ponies stock than the force inducted one does, the NA car would yield the bigger gains and the turbo one lower. So then you can say the NA one responded better.
So anybody that says BECAUSE ITS FORCE INDUCTED IT RESPONDS BETTER etc etc etc etc etc, well thats not true. The percentage of increase remains the same, always did and always will, but having higher ponies to begin with makes it gain more.
But the truth of the matter is simple.
You gain a percentage over stock.
The worse the stock system was, the greater percentage you will gain.
The percentage gained does not change whether is NA, SCed or Turboed.
Example:
2 cars with the same engine, one forced inducted the other NA.
Both had stock systems sized for the particular application, which we know there is a difference.
The NA car makes 200 ponies and the forced inducted one makes 300 ponies.
Since both were made by the same builder, sized accordingly each may see a 10% gain from the exhaust change. NA has now gained 20 ponies and the forced inducted one 30 ponies making 220 and 330 now.
You will not get the NA to only see 5% gains, while the force inducted sees a 15% gain.
If it was the other way around with the NA car built in such a way that it makes more ponies stock than the force inducted one does, the NA car would yield the bigger gains and the turbo one lower. So then you can say the NA one responded better.
So anybody that says BECAUSE ITS FORCE INDUCTED IT RESPONDS BETTER etc etc etc etc etc, well thats not true. The percentage of increase remains the same, always did and always will, but having higher ponies to begin with makes it gain more.
what your saying is true of NA and SC cars, but on TC cars it really will make a greater difference. TC exhaust systems dont work the same...which is why the only time you want a 200hp car to run a 3" exhaust is if its TCed. i do understand what your saying though, and your correct when you apply that to NA and SC cars.
09-30-2007, 07:08 PM
#19
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if he was running an internal wastegate, the less back pressure and quicker spooling the wastegate wouldnt have time to open up... its basically a "boost spike" on internal wastegates, atleast thats all i can see what he meant by this unless he upped the boost. that is why ppl run external wastegates. they hold boost lvls to exactly where you want them and dont allow for spike like internal do... they are just better for performance engines
09-30-2007, 09:07 PM
#20
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