scorp508

This depends. Do you plan on modifying the car much beyond what you have done already? If it were me I would suggest to you the y-pipe w/o cats as long as you did not already plan on spending $500ish for longtube headers down the road. I think you will gain more by ditching the cats than you will by adding roller rockers. You're intake is already a bottleneck and adding more lift to the cam isn't going to help you as much as being able to get out what is already going into those chambers.

You're in Nashua, no emissions? I'd ditch ALL the cats.


[Modified by scorp508, 11:33 AM 10/2/2003]

shotchkiss

MR = Miniram
SR = Superram

Both of them are different kinds of intakes I wouldn't mind having but can't afford.

91 black convert

If the intake is the bottleneck at this time, wouldn't it make more sense to go with the SLP runners? :confused:

And, NO, I don't plan on any major mods in the future.

Jim S. :seeya


[Modified by 91 black convert, 11:51 AM 10/2/2003]

scorp508

I personally don't think (Others like Vic and 65Z01 are better to give an opinion on this) there is as much gain with the runners and a stock base. If you had an aftermarket base I would say go for it.

The intake was designed for a 305ci engine. The exhaust manifolds are not that much better. The day you take the manifolds off and look at their ports is the day you bust your azz laughing when you see them. :)

Nathan Plemons

Well Scorp, you've been in the same boat I have. There's always the whole "while I'm into it" fever.

I can see this costing much more than $300. :reddevil

Alcee1

I vote for R/R or shift kit. :yesnod:

VetNutJim

Scorps right on the exhaust manifolds.
The ports on the manifold are about as big around as your thumb.
What a JOKE! I can't believe GMPT did this. What were they smoking??

A air compressor and a 20 buck die grinder can fix that pretty easily though.
But they are still restricted where GM smashed the four pipes in half to bring them into a 'collector' of sorts.
Headers can fix it a WHOLE LOT better.

Edit: BTW: use the same die grinder on your stock plenum and base manifold.
You can use it to cut your plugs back too, if you're careful.

Oh, bump your base timing up a couple degrees if you ALWAYS run 91 octane or above.



[Modified by VetNutJim, 12:38 PM 10/2/2003]

91 black convert

Thanks, guys, for all the input.

I'm surprised that the performance chip didn't get any support. I would have thought that a Hypertech chip would do me some good at this point.

Jim S. :seeya

scorp508

Nope, I highly doubt it would. All the hypertech chip does is severely advance your timing.

You could also (for free) remove your plenum and grind the obstructions out of it that are behind the throttle body.

91 black convert

I never did find out what the 85 converter was going to do for me. :confused:

Jim S. :seeya

shotchkiss

The '85 Vettes had a higher stall speed torque converter in them than the later models. I'll have to let someone who knows more about this say exactly how it helps, I think it just lets your motor spool up faster and get in its power band sooner.