HP Gain Estimate?
#1
HP Gain Estimate?
This is a dumb question but can anyone guess about how much horsepower i would get on an 02 six speed with the berk intake and a custom rear section if i added a high flow cat, y pipe and b pipe from cattman?
Thanks
Thanks
#5
i was trying to be nice
btw...once the extra power gets to the wheels, you will hardly tell a diffirence. throttle response will be a little quicker but power diffirence will be impossible to notice. its there...but you wont really notice (butt dyno doesnt count)
btw...once the extra power gets to the wheels, you will hardly tell a diffirence. throttle response will be a little quicker but power diffirence will be impossible to notice. its there...but you wont really notice (butt dyno doesnt count)
#7
Originally Posted by NmexMAX
I made 230+ with only headers + intake (stock cat back/cat.)
largest gains are
3.0 - intake + y-pipe
3.5 - intake + headers
#9
Originally Posted by soonerfan
well we all know that catbacks dont really give us big gains.
largest gains are
3.0 - intake + y-pipe
3.5 - intake + headers
largest gains are
3.0 - intake + y-pipe
3.5 - intake + headers
when i say big i mean like 10+whp
#11
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Location: Baton Rouge, LA
Posts: 5,432
Originally Posted by Mass_Media
I thought 3.0's got big gains from timing advance?
when i say big i mean like 10+whp
when i say big i mean like 10+whp
#13
a few notes:
1. timing advance probably won't show gains on a dyno. The timing advance has two main plusses: First, better throttle response at the low end. Second, smoother idle. If there are actual WHP gains, they are minimal (btw, I have timing advanced)
2. On a 3.5, the ypipe gives pretty minor gains. Ypipes are effective on the 3.0 because they eliminate the precats, so we gain alot of power from them. On the 3.5 with a ypipe your precats are still there, so not much gain. For 3.5 you need to go with headers for any significant gains.
3. Intakes alone are good for a couple WHP. Some more than others, and at different places in the curve (PR intakes have better low end power, berks tend to have better high end). The more "breathing/exhaust" mods you put together, the more the effects of each are amplified, generally.
4. bpipe is usually good for a couple WHP as it eliminates the crimp/restriction inthe stock bpipe. Mufflers really give no gains unless you are running pretty high power/FI/Spraying.
5. High-flow cat is worthless unless you're FI and need the extra flow, in my opinion.
1. timing advance probably won't show gains on a dyno. The timing advance has two main plusses: First, better throttle response at the low end. Second, smoother idle. If there are actual WHP gains, they are minimal (btw, I have timing advanced)
2. On a 3.5, the ypipe gives pretty minor gains. Ypipes are effective on the 3.0 because they eliminate the precats, so we gain alot of power from them. On the 3.5 with a ypipe your precats are still there, so not much gain. For 3.5 you need to go with headers for any significant gains.
3. Intakes alone are good for a couple WHP. Some more than others, and at different places in the curve (PR intakes have better low end power, berks tend to have better high end). The more "breathing/exhaust" mods you put together, the more the effects of each are amplified, generally.
4. bpipe is usually good for a couple WHP as it eliminates the crimp/restriction inthe stock bpipe. Mufflers really give no gains unless you are running pretty high power/FI/Spraying.
5. High-flow cat is worthless unless you're FI and need the extra flow, in my opinion.
#14
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Join Date: Jan 2006
Location: Chicago,Bartlett,Ill Kolno, Polska
Posts: 1,431
Originally Posted by Mass_Media
I thought 3.0's got big gains from timing advance?
when i say big i mean like 10+whp
when i say big i mean like 10+whp
#15
OK. so after these inputs, i would like to know how much louder headers will make the exhaust tone? I have a custom axel back section with a borla muffler and im afraid it would be really loud. anyone have sound clips or suggestions, cause i dont want a super loud car. Also, the clips i have heard make the tone sound really high with the stock cat back and i dont like it much. i really like the sound it has now and im afraid ill lose it.
Thanks
Thanks
#16
One thing to consider is after headers, you might be able to pull 20whp but only after tuning. Headers typically make it run pig rich and you could even be worse off than before. To make the biggest difference you would need an afc or some fuel tuning program to take fuel back out. My AE went from a perfect 13.0:1 almost across the board to a 11.5:1 almost across the board after headers. Headers with a b pipe and any kind of straight through muffler will be loud, at least IMO. I went with hotshot headers, stock cat, cattman b pipe and stock axel back. Best blend of performance, money spent and sound IMO.
#17
I have a 3.0 5-speed.
I have all the bolt ons
I have to say honestly the VIAS removal and "3.0 SSIM" mod gave me the most ooomph. Even more than y-pipe and full exhast. 17 degree advance give *a bit*
...I have yet to dyno my car.
Currently I'm undergoing some maxipad rennovating.
Starting with some Cattman Gen1 headers with JWT popcharger to replace my 3" filter. EGR removal, yada yada yada.
We'll see how that turns out.
I'm going all out top-end power to trade for my low-end torque.
I have all the bolt ons
I have to say honestly the VIAS removal and "3.0 SSIM" mod gave me the most ooomph. Even more than y-pipe and full exhast. 17 degree advance give *a bit*
...I have yet to dyno my car.
Currently I'm undergoing some maxipad rennovating.
Starting with some Cattman Gen1 headers with JWT popcharger to replace my 3" filter. EGR removal, yada yada yada.
We'll see how that turns out.
I'm going all out top-end power to trade for my low-end torque.
#18
Originally Posted by sloppymax
One thing to consider is after headers, you might be able to pull 20whp but only after tuning. Headers typically make it run pig rich and you could even be worse off than before. To make the biggest difference you would need an afc or some fuel tuning program to take fuel back out. My AE went from a perfect 13.0:1 almost across the board to a 11.5:1 almost across the board after headers. Headers with a b pipe and any kind of straight through muffler will be loud, at least IMO. I went with hotshot headers, stock cat, cattman b pipe and stock axel back. Best blend of performance, money spent and sound IMO.
The performance gain after the headers was very good too. I had a Y-pipe for a while then went with headers. I should have just done the headers and not waisted my money with the Y-pipe. I dynoed with the Y-pipe then with the headers. The headers gave me a lot of torque in the higher RPM range which, of course, calculates into higher HP.
#19
Originally Posted by IloveVQ
This is a dumb question but can anyone guess about how much horsepower i would get on an 02 six speed with the berk intake and a custom rear section if i added a high flow cat, y pipe and b pipe from cattman?
Thanks
Thanks
http://forums.maxima.org/forumdisplay.php?f=48
#20
Originally Posted by MaxBoost925
...I have yet to dyno my car.
Originally Posted by MaxBoost925
I'm going all out top-end power to trade for my low-end torque
Originally Posted by IloveVQ
i would like to know how much louder headers will make the exhaust tone?
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