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11-17-2009
I put a down pipe on my o4 gtp and the check engine light came on about the catylsyt effincency I was wondering what can I do to make the light go out is there some sort of o2 simulator I can buy or program and will this mess anything up. I want to put a 3.4 pulley on the car next is it safe?
11-17-2009
safely modding your 3800.
read it.
marry it.
or just read it 90 times before saying that 3.4" stuff, ESPECIALLY with a GenV car.
Last edited by blueguy; 11-17-2009 at 02:22 AM.
11-17-2009
so u installed a down pipe w/o a cat then? o2 simulator is your best route then.
11-17-2009
what do u mean dont put the 3.4 i read your thread and u said it will be fine but i am kind of confused with your reply. So will it hurt me or not i dont plan on doing any thing else to the car but an 160 or 180 I already put a bit colder plugs and wires I am also going to build a cold air intake thats it nothing more. I just dont want to hurt my car. I just want a little more powerOriginally Posted by bluegtp91
11-17-2009
You have an 04.. The 3.4 on the GenV is equivalent to a 3.2 or so on a GenIII due to the better flow on the GenV
11-17-2009
so will it hurt my motor
11-17-2009
maybe. we dont know. you have to scan it.
11-17-2009
prob will tho. do a 3.6. forget the o2 sim, just get a tune when u drop the pulley size, u will need 2 anyway.
11-18-2009
so where can i get a good tune is there some where in or near philadelphia pa
11-18-2009
3800 Performance has the DHP PCM...best mail order tune ever for the 3800...tried and true for years. I actually just found out a couple days ago that the guy who started Digital Horsepower lives less than 20 minutes from 3800's Business location...so if they have any issues they just call him up. And if you want a custom tune...I'd find a local GP forum...and see if anyone tunes there. For the GenV you need to compinsate for the more efficient supercharger. Like they said...a 3.4" on a GenIII is more like a 3.6" is GenV...you'll make as much power if not more, with less boost, less heat...and less parasitic loss.
11-18-2009
so dont put the 3.4 on ?
11-18-2009
reading that thread should be part of registering as a member.
Originally Posted by SuperSport
11-18-2009
No 3.4 without some more mods for sure.
Last I heard the O2 sim doesn't work on the 04+ cars. Just get it tuned out if your running catless.
11-19-2009
thank u
11-19-2009
Your welcome
11-20-2009
Did I not say the 3.4" was too small?
Or did I not explain it well enough...
11-20-2009
you also need better flow mods too. get a plog or if you have dremel just hog that betch out and save yourself some money for other parts
11-22-2009
what is a plog
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