Getting power???
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Joined: 07-20-06
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From: Norman Oklahoma
not too much you can do. just exhaust, intake, heat exchanger, uhhhh... ya thats about it No more than probably twenty to thirty horse if full exhaust
and dont forget that every decal/ sticker adds 10 extra...
and dont forget that every decal/ sticker adds 10 extra...
Last edited by MBMCustoms; Sep 4, 2008 at 02:22 PM. Reason: Automerged Doublepost
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From: In a house.
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From: UNDER YOUR BED
How would a header but with the stock exhaust and a gutted cat?
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From: Boynton Beach, Fl
Id say about, 5 hp... Gotta make sure they are shorty headers to fit stock downpipe...
Shorty headers that i have seen are kinda expensive... i personally would think you would get more from a upgraded downpipe..
Shorty headers that i have seen are kinda expensive... i personally would think you would get more from a upgraded downpipe..
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Joined: 10-06-05
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From: Seneca, South Carolina
Copy and pasted from my thread, power can be made without pullies.
From stock to modded (mods being raised rev limit, cobra h/e, cutout) I gained 8mph in the 1/8th and 7mph in the quarter. Top end just isn't going to be great because you just aren't flowing a whole lot of air on the stock header and downpipe. Aftermarket header and downpipe would have netted even better top end.
Ok, so stock I went 14.8@94mph. My 1/8th mile was 9.5@72mph. Not bad at all for where I'm at. I was disappointed but that day it was really hot and that's just all it could do.
ECU TUNING ONLY
I went back to the track after I changed some things in the ecu. I raised the rev limit to 7500 and disabled all tq management and boost limited 1st gear down to 40%. Well, it didn't result in the best e.t.'s, but I did trap higher. I went 14.6@96mph in the 1/4 and 9.4@77mph in the 1/8th. So I gained 5mph in the 1/8th but only 4mph in the 1/4. That clued me in that I was heat soaking up top. It was also really hard for me to take off the line fast. The car just bogged out real bad. So I knew that I had lowered the boost too much. That's why my 60ft's suffered and I couldn't run that much faster with my e.t.s.
COBRA H/E and CUTOUT
So my next mods where a cobra heat exchanger and I decided to go ahead and do an exhaust cutout. I know a cutout isn't technically a stock exhaust anymore, but I am still using stock exhaust manifold and downpipe. So technically if you unbolted your catback and ran open downpipe, you'd get the same results. I also raised the boost limiting to 70% in 1st gear. I ran a 14.4@101mph in the 1/4 and a 9.4@80mph. The track didn't prep at all and my 60ft's where horrible. Those were 13sec runs that I just couldn't achieve do to my stock wheels and tires and no track prep. But I did learn that this car is plagued with massive heat soak. I couldn't believe how much I gained with such minimal mods. I now have gained 8mph in the 1/8th and 7mph in the 1/4. But it tells me that I'm still heat soaking. You should gain more in the 1/4 than in the 1/8th.
ECU TUNING ONLY
I went back to the track after I changed some things in the ecu. I raised the rev limit to 7500 and disabled all tq management and boost limited 1st gear down to 40%. Well, it didn't result in the best e.t.'s, but I did trap higher. I went 14.6@96mph in the 1/4 and 9.4@77mph in the 1/8th. So I gained 5mph in the 1/8th but only 4mph in the 1/4. That clued me in that I was heat soaking up top. It was also really hard for me to take off the line fast. The car just bogged out real bad. So I knew that I had lowered the boost too much. That's why my 60ft's suffered and I couldn't run that much faster with my e.t.s.
COBRA H/E and CUTOUT
So my next mods where a cobra heat exchanger and I decided to go ahead and do an exhaust cutout. I know a cutout isn't technically a stock exhaust anymore, but I am still using stock exhaust manifold and downpipe. So technically if you unbolted your catback and ran open downpipe, you'd get the same results. I also raised the boost limiting to 70% in 1st gear. I ran a 14.4@101mph in the 1/4 and a 9.4@80mph. The track didn't prep at all and my 60ft's where horrible. Those were 13sec runs that I just couldn't achieve do to my stock wheels and tires and no track prep. But I did learn that this car is plagued with massive heat soak. I couldn't believe how much I gained with such minimal mods. I now have gained 8mph in the 1/8th and 7mph in the 1/4. But it tells me that I'm still heat soaking. You should gain more in the 1/4 than in the 1/8th.
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From: reading,pa
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From: Seneca, South Carolina
I did not add 42lb injectors until after I had ran with nothing more than cobra h/e, cutout, and raised rev limit to 7500rpms. That was it. Stock injectors.
call it ralliartist stage 1 if you will. lol.
call it ralliartist stage 1 if you will. lol.
Last edited by ralliartist; Sep 4, 2008 at 06:40 PM. Reason: Automerged Doublepost
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From: PA
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From: Seneca, South Carolina
Porting everything doesn't "lower" boost. The boost is built in the manifold by the m62 supercharger. When you port everything out, it makes it easier for the air to flow through the engine, which causes the air to not "build up" as much pressure. So on your boost gauge, you'll see a drop in psi, but you are actually flowing a lot more air.
all that port work isn't cheap. For CHEAP QUICK power, your best bet is to go with cooling mods, bolt ons, and a tune. Then size the right pulley to your style of driving and racing.
all that port work isn't cheap. For CHEAP QUICK power, your best bet is to go with cooling mods, bolt ons, and a tune. Then size the right pulley to your style of driving and racing.
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From: Lake County IN
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From: Oromocto, New Brunswick
Depending on the dyno he could see that for sure if he gets a tune for the 2.9 and 60's. I saw a video on ontariocobaltclub of a guy dyno'ing 260whp with JUST stage 2, intake, headers and a downpipe with stock cat-back. If he throws a 2.9 and a cat-back to finish off that exaust, and gets a better tune I could see picking up an extra 10whp+. Now theres some dyno's that are reading like 225-230whp with similar mods as that guy and theres no chance in hell you'd hit 270whp with what your gonna run. Dyno's are only usefull if your comparing to other cars or other results from the same kind of dyno and thigs like correction factors, sae and std dyno charts, ambient temps and even what kind of fuel your running(if your tune is agressive and knocks on bad gas) can all affect what you dyno at.