Well I'm planning on a valvetrain and cam swap this summer and stumbled across some 241's for $150 and was debating if it would be worth putting these on instead of reinstalling my 98' (806) heads. I'm on a strict budget and not looking for huge power just a great power curve for fun on the street. I plan on doing a custom mild street cam (below 230 duration) through Patrick G. Patrick if you could chime in that would be awesome!!!

 

spend the money on a ls6 intake during the swap

 

unless the heads are milled...i would worry about it.

 

i do plan on getting a ls6 intake manifold but figured this would be easier to replace after the cam swap as it is on the top of the engine while cylinder heads are way to involved to take the topend off again especially because I plan on building a whole new engine in 2-3 years (when I get out of college)

 

I read in the 98' 400 rwhp cam only thread that a guy heard 99+ heads made an extra 15+ horsepower over the 803's

 

It is some work to do for the extra power but as long as you think it is worth it that is all that matters .

 

15 hp is probably a streach.... i did a head swap on my own car, and it is so much work i honestly wouldn't consider doing it without the new heads being ported, to me even if it was 15 hp it really would NOT be worth it.

i say, do it right the first time.

 

Unless you find some good 243s or something lightly ported don't swap an LS1 head for another LS1 head.

 

If you dont mind doing the work, mill yoru existing heads for a little added compression.

 

Definately not worth the time or money.

 

just buy a cheap pair of 243s.. much better then 241s

 

Oh yeah, you mean 806 castings. No one has pointed this out yet. I also agree, not worth it.

 

i did forget to mention, I will be taking my stock heads off anyways because I have a lifter going bad. So the time and effort thing isn't a big deal. The only other nice thing about getting these 241's is I could have them already to go when I start my tear down minimizing the time my car is done since its DD.

 

hmmmm.... so it seems this might not be worth $200, I would still like some other comments on gains expected with this heads please!!!! I would still like to hear what Patrick G has to say

 

I do agree with the do it right the first time mentallity but i don't have alot of money and I will be taking the heads off anyways so I figured if I can pick up 10-15 hp for roughly $200 and these heads also only have 13,XXX miles on them while mine are 128,XXX miles I figured it might not be bad. I would get these milled if Patrick G would recommend that for the specific came I'm going to have him spec.

 

Expect virtually no gains just moving to 241s. Expect 10 - 15 HP out of some 243s. I would strongly consider looking into a set of ported / stock valved 243 heads. These can be had for well under a grand and even cheaper if you pick them up used. Get a nice thin gasket for a tight quench. Just watch P to V depending on how big your cam is. That setup can be good for 30+ HP.

 

Since your taking off the heads anyways, why not?

i mean your not going to see 30+ hp, but for 150$ i cant complain for 15hp.

plus like you said, your heads have 125k on them, put the fresh 241 with upgraded springs and i think ull be happy,

i have the 98 casting heads to...lets just say they suck!

 

You wont see 15 HP moving from 806 to 241 heads. You might see 10 or 15 moving to the more expensive 243 castings (ls2/ls6).

The stock 241 castings he asked about will offer no perceptible gains at all. If money is tight, mill and freshen up the existing heads. Milling for added compression will make a good bit of difference in both power and drivability, whereas switching to the 241 castings will do virtually nothing!

 

thanks guys, keep it coming!!! one other point is that if I get these 241's i would also have to track down and buy the correct valve covers and coil brackets. Can i still use my same coils by the way???

 

coild are the same, but youll need the coil pack brackets, or do the coil relocation mod.