Found a new L98 stock cam for an 87 IROC. How would this rate compared to the COMP XR264HR Ive been looking at? I can get it dirt cheap. Would it make any gains in my LB9?

COMP specs are 212/218 @.50 with .487/.495 lift , 110 lobe sep

 

There's a reason you can get it "dirt cheap".

You get, AT MOST, what you pay for. And usually less than you pay for.

Paying money for a stock cam pretty much falls into that category. Don't do it.

In fact, the tech info on this site notwithstanding, you may already have that identical cam in your motor. In various years, the 305/5-speed cars got the same cam as the 350/auto ones.

I have the XR264HR in my car. It runs GREAT. I think you'll like it.

 

thanks sofa. I did find that they should be the same in an article on 3rd degree by vadar. Are you running 1.6 or 1.5 rockers with your cam? wat springs? yours 305 or 350?

 

305, carbed, 1.6 steel roller rockers (Comp 1300 series), Comp 987 springs.

 

did you switch from tpi to the carb. I thought about that, especially with the 350 block I have ready to go. The only reason I'm not using is I dont want to change the computers.

 

No; my car is an 83. It still has the stock Q-Jet and computer stuff all on it. So it's pretty crippled; only puts down 237 RWHP; but that's still about 40-50 more than a stock L98, so I guess it'll just have to do.

 

Gotcha, I started to buy an 83 a few weeks back in FLA. Needed some work but was priced right and had a set of GTA rims on it. Q-jets, I know well, had two 77 bandit cars that I built. Just learning the TPI stuff. I think my LB9 has about 225HP factory, with the mods, I'm hoping to get 275+

 

If I remember correctly, I think the lift on a stock 350 TPI cam was 442ish

 

Cool... you'd only be about 15-20 or so shy of me then, since 237 HP at the wheels is somewhere around 290-295 at the crank. Not too bad for TPI, considering how bad it usually costs HP compared to a carb, if it works out like that.

Let us know what your dyno numbers are when you get it done.

 

The 87 350 camshaft is the smallest of the 350 cams, so if anything that would be a downgrade from what you have. The comp cam looks pretty good, but it will have a bit of a lumpy idle with that 110 LSA.

 

Right...

The better version of the XR264HR for TPI is this one http://store.summitracing.com/partde...2D08%2D501%2D8 with the 112° LSA.