1998BlackPlasticToy

My goal is to get just past 500 hp at the rear wheels in my 98 vert.

Here's what I've got / and have on the way:

Comp cam 259/265 duration, .515/.522 lift

Kooks Long tube with HiFlow cats

Maggie TVS2300 w 3.1" pulley

Batwing CAI

I understand the lower end is good to approx 550 hp. I don't race, I drive hard but mainly on 2 lane country roads. I'm not anywhere near red line when I drive.

The only additional part I can think of that MIGHT get me to my mark would be some 1.8 rocker arms... Don't want to buy anything I don't REALY need, just want to make sure I reach my goal.

Thanks.

JoeyG

Find a set of 243/799 heads, imo to do a fun to drive h/c/blower combo. Personally I despise the use of non-stick ratio rockers as it always seems to throw the geometry/wipe pattern off unless your going solid roller or custom setup.

NukeC5

You should be far past 500whp if you go with all that. You can achieve 500whp with a supercharger alone. With a crazy cam and LT headers you'll be well over.

LedfootLarry

It's an awfull disease , a terrible sickness , and an addiction to boot

_zebra

yeah, if you can't make over 500 with that setup, kick your tuner in the junk & have a mail-order/datalog tune done by some of the guys on here.

at your elevation with LTs & stock heads, that pulley should be good for about 9psi. depending on how much overlap your cam has, you'll probably lose a good 1-2psi but should still be north of 500 due to the top-end that cam should make.

also, if you ain't installed the blower yet, it'd be worth your while to take the lower manifold off of it & have it ported out to rectangles instead of little triangles. that'll help in the higher rpms

1998BlackPlasticToy

THANK YOU. I thought so too, but just wanted some confirmation. I've read and studied on this forum a lot, and if anyone is willing to read and learn, almost all the answers are here.

Blower is not installed yet. I'll contact my tuner and see if he can get that taken care of. My cam has an overlap of 112. I knew about the loss from the headers and that's why I went with the smaller pulley - that the salesman said I didn't need and should have put on smaller headers. Duh. I thought the purpose of the blower is to move AS MUCH air in and out as possible!

Thanks for all the comments. I appreciate them. I'll let you know how it goes; post my sheet at the end.

_zebra

looks like the Comp XFI 206/212 .515/.522 112.
it actually might be within a psi or so of stock and should be a good mild gain all around.

using 1 3/4 headers with a mildly-blown LS1 will move plenty enough air. you don't need 1 7/8 til you start really turning up the boost or going big cubes. that's why he recommended the smaller ones, but they'd be pretty close to each other for any boost reduction.

your altitude will account for almost 1psi less than at sea level, so that's another reason to go with the smaller pulley you have.