1998 Grand Prix GTP Bolt-on Upgrades

[Ripn12s]

Doesnt matter, any of those intercoolers will work.

The Thrasher raises the blower the most out of the 3. It will fit with a stock hood, and some modifiction on some aftermarket hoods. The thrasher is also the most expensive.

Like I said, get a scan tool and then go from there.

Tim

[GTPCatz]

Its Not Trasher!

Its Thrasher!!!!

[kilroypr]

GTP Catz, thanks. What is important is that I was understood. For your sake then Thrasher(Trasher is not that bad taking into consideration is a shorter word and could mean trashing competition, LOL )

[kilroypr]

TIM, I just checked the order they made on 9/19/03. The pulleys they ordered are 3.4" and 2.8" from thrasher( GTP Catz). I already sent a note to Chavin to see if the cables he has work with my PalmVx. I am pretty sure that with 93 Octane(Available here) and the Octane Boost that I add every tank full the K&R is 0 or really close to 0 with the 3.4" pulley. Now the tests I am going to make are the K&R with TCS on, TCS off, same for both pulleys and will let you know.

[kilroypr]

Tim, another question. In the mean time, if a 180 or 160 thermostat is installed, with the coldest spark plugs possible and DHP or similar ECU(PCM) is installed. Would not it help to reduce the K&R with increased SC flow? Just a tought!

[Ripn12s]

Colder plugs and tstat will help eliminate some KR.
Try a set of Autolite 104 they are 2 heat ranges colder then the stock plug, use a gap of .55

These 2 things will not increase SC flow, only thing that will affect that would be smaller pulley, better flowing intake, ported blower housing, exhaust.

I doubt you'll see 0kr with the 3.4 pulley. I dont think that octane booster is doing anything either, that stuff has been proven to only boost octane by 1 or too at best. Do a search on clubgp about stuff called Turlean/Torlen (not sure if thats spelled right)

TCS is not going to affect KR. You'll see KR all throughout a 0-WOT run.

[kilroypr]

I know about the SC flow. I already drive the car with the 3.4" on a daily basis. Already paid Mr. Chavin, as soon as I get the cable and program will try that on the car to check the K&R. I will check with the guy that moded the car at the dealer to see exactly what Tstat was installed and if the PCM is aware of this. If it is a 180 then I will ask him if he can lower the PCM(ECU) tstat rating and will install the colder plugs if indeed IC K&R when Mr. Chavins kit arrives. Is the K&R will show up idling or under load?

[Ripn12s]

KR (Knock Retard) will not show up at idle only under load.

Usually on the mid to higher RPM's and on the shifts.

[kilroypr]

Isn't supposed to be normal to have K&R on shifts?

[Ripn12s]

It's normal to have KR but the goal is to get it as low as possible 0

The more KR the car see the less timing you'll have and the less HP you'll produce

[kilroypr]

Ok, now that we are at this poing. I feel that my car after reached the OD the K&R is really close to 0. Pulls really strong, I will certify that with Chavins cable. Now what you think is acceptable? The 3 deg you have on a daily basis or less?

[Ripn12s]

3kr on a daily basis

After you've reached OD your getting further out of the powerband and the car will stop gaining sooner or later. You want to make as much power through the gears as possible.

This goes along w/ your love for high speed racing. It doesnt matter how fast your top speed is, it matters how fast you get to the top speed. Who cares if you can go 135 mile per hour if it takes you forever to get there.

[kilroypr]

Got it. As soon as I get the cables and I install the Thrasher CAI and Ubend removal will do the tests. The CAI will reach here before the LS1 cables. So I will be ready for that.
And you are correct, does not make sense to have a top speed of 155 if will take you fore ever to get there. That is not my case but I see your point tought