Biohazards '99 GTP

[Biohazard]

Well, here she is. I got the car before I left for AIT this summer (2013), stock, no mods. Some of the first things I did were cleaned off all the dust and grime from living on a farm house most of its life, painted the rims/spoiler/chin spoiler black, painted the dash/center console white, full kicker audio with 12" sub, removed the cat, added a simple open cone intake, along with some other minor things. Then I had to go to AIT for a couple months. I came back and had some spare funds to get a 3.5" pulley, PCM, plugs/wires, and a 180* thermostat.


Current short term goals are fixing some paint spots, 2.5" exhaust/3" DP, SD Hood/Air dam, and suspension. Eventually some more mods so I can run a 3.4" pulley.

[Matt Palm]

Did you install the 3.5 yet? if so what kind of kr are you getting

[Lishap]

Also are you getting a CEL for it missing the cat?

[Biohazard]

I have. I don't remember the numbers but running 91, it was a small amount (I want to say somewhere between 5-10?). And that scan was before I got my colder plugs installed.
I do get a CEL for the cat.

[Matt Palm]

5-10? thats terrible it shouldnt be over 3 especially with it being a smaller pulley

[Biohazard]

I don't remember the numbers, and it was before plugs and when the car had been sitting for quite a while.

[Matt Palm]

plugs wont lower kr.

[Matt Palm]

please read this
http://www.grandprixforums.net/safel...0-a-67580.html

[Iceman6669]

5-10* on a 3.5" pulley is like 10*-20* on a stock pulley..

[Matt Palm]

which means chipped pistons

[Iceman6669]

Not for sure... But will not end up good of you continue to see those kinds of KR numbers.

[Biohazard]

I'll get it rescanned sometime soon, and thank you. Still learning these cars. Would powerlog and downpipe be a good combo for kr reduction? Or is there something else, around the same price range, that would reduce it more?

[Neil98gt]

Have you done anything to the exhaust besides removing the cat? If not you'll want at least a PLOG and a down pipe to delete the u-bend. The factory exhaust is pretty restrictive pre-cat.

edit:you ninja posted me.

[Biohazard]

Cat and no mufflers. I wanted to remove the U-bend but I didn't want to risk just chopping it because of the O2 sensor. I'll add the powerlog to the top of my list of needs. Thanks for all the advice everyone, appreciate the help.

[99GTRED]

looks good!

[Matt Palm]

a lot will say get sd headers. but for around the same price you can get a 3 inch downpipe and a plog. and not have to worry about fitment issues or leaks. the gains arent as great as headers but unless you wanna drop 500 ish on good headers then just plog and dp

[Iceman6669]

Personally I went with headers over PLOG/DP combo. Flow better for a close price.

[Biohazard]

Okay, so I'm slightly confused about headers and powerlogs. Is the powerlog completely seperate from the headers, or if I were to get the SD headers would the powerlog be included? I want to get headers eventually, is it better to just say get the 3" DP asap and save for headers, or get the DP and plog, then upgrade to headers?

[Matt Palm]

the plog and headers are different. plog is a manifold while headers are tubes that meet in the crossover

[Iceman6669]

If your going to get headers, just get headers. Don't waste your time with anything else. But a PLOG will work.