I just installed a 3.4 and swapped out the 3.0 tensioner for a 3.5. Couldn't wait for the snow to melt, now I just have to install the plugs.
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02-07-2009
I just installed a 3.4 and swapped out the 3.0 tensioner for a 3.5. Couldn't wait for the snow to melt, now I just have to install the plugs.
02-07-2009
I have also changed to the 3.4" s/c pulley. I have not changed plugs yet or the 180 thermostat. They will be done this weekend. My question is did the overkill pcm give instant power gains? I also have yet to delete the u/bend pipe with the straight pipe. Should I also delete the exhaust resonator, and go with larger muffler? what exhaust system would would you recommend? corsa?
02-07-2009
About the only huge thing you will notice out of a pcm would be the way it shifts. Other wise it will just help everything else out
02-08-2009
From what I read on the thrashercharged web, installing a cat-back exhaust does not provide much hp gain. If I get the overkill pcm, should i get a cat back with the resonator deleted? Is there any other mod i could make that would give me a noticeable power gain before purchasing a cat-back?
02-08-2009
You're right. CatBack's dont do much if anything for horsepower. Just sound. Resignator will cause a lot of raspyness in the exhaust. Headers will give you a nice gain in power for sure.
02-09-2009
I asked Will (Overkill) about a retune if I installed a 3.4 pulley and this was his response; A retune should not be required when installing a 3.4 pulley on the tune we provided you. Disconnect the battery to reset the PCM for at least 30 minutes while installing the pulley to allow the PCM to relearn.
Well I took the Imp for a short ride today and all I can say is Wow. The Imps so much faster, makes me wonder what a 3.2 or 3.0 would be like. Even though I'm curious I'm going to stay at a 3.4. When I push the peddle half way the tires loose traction. If I were going to race I'd definitely go to a smaller pulley. I know the pcm has to relearn, because the battery was disconnected for a week and hopefully that means even better performance. I didn't get to drive hard, cause I was on the local streets. I didn't have any kr driving normal then punching it, but flooring it and spinning the tires I did get 3.0 degrees of kr until the tranny shifted. I'm going to take it easy until I get the install the plog and crossover. I also need two get my Lim done, I highly recommend this mod to anyone contemplating it. I could do a Burnout before but now they are crazy long.
Btw Will also said; You should be just fine to run a 3.4 with the modifications you've listed. If you find you run into any significant KR (above 4*), I'd look at a stainless ZZP Powerlog, but the 3.4 should be safe and perform well with your list.
Notice he said above 4*, Im getting 3* but I want O*. Hopefully the plog and crossover will get me there. I'll also be installing rockers in the near future, keep in mind the computer needs to relearn and my Lim problem.
Last edited by kissmyss; 02-09-2009 at 05:13 AM.
02-09-2009
Originally Posted by kissmyss
Sorry but I have to say that is bad advice on WILL"S part. He nor no one else can say how you're car is doing without scanning...bottom line.
And unless he added a bunch of fuel to you're PCM i wonder how it is ''ok'' to run the PCM that he tuned for the stock pulley...With the 3.4. Enless you told him to tune it for a 3.4.
02-09-2009
On another forum someone stated that Will tunes the pcm on all vehicles with superchargers to run smaller pulley, because most people drop pulleys sizes and if they don't the tune is still ok to run on a factory pulley. That's the reason I ask Will about running a 3.4 before I purchased it. The paperwork that comes with the pcm says it has performance fueling specifically for smaller supercharger pulleys.
02-09-2009
I have not experienced any kr and drove the car with the 3.4 pulley and thrasher cai for the last few months of the summer. I have decided to purchase the slp header, U-bend delete, and Overkill Pcm. I will keep my fact. cat...and exhaust until I see how the car performs this spring. I can't wait to get the work done. I will be doing the work myself, How difficult is changing the headers? It doesn't look that difficult. Does anyone know an estimated 0-60 time or 1/4 mile estimate after this work is complete?
02-09-2009
do you have an 04 comp g????
you have a 3.4 with just an intake and your not knocking? how are you scanning for knock??
02-09-2009
Was thinking the same thing.
02-09-2009
Another (you)
02-09-2009
i do not have a factory freak if that is what youre saying. i still knock up to about 5* on my 3.4 as is without a tune. once i slap on my alky kit (probably sometime this week if i feel good about it) i should be able to run the 3.2 with minimal knock.
my car is still not tuned after all ive done to it.
02-09-2009
possible. i dought it tho. 3.4 is like a 3.3 or smaller on yalls car. gotta love that gen V
02-09-2009
How would I scan for kr?
02-09-2009
By hooking up a scanner of some sort while driving, Autotap, Scangauge, etc. It's not something you'd just notice.
02-09-2009
and Yes It is a 04 comp g.
02-09-2009
yea you would need a scanner of some sort.
i think i might have to venture off into the alky world
02-09-2009
its kinda got a variety tune. after a 3.4 tho i think it does need a retune.
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