The guy who's gonna build my engine just did an LS7 heads & cam on a Z06. Ported the heads to flow 397@.650 lift and used a tiny 228 cam. He dynoed 568 RWHP.

He also just did a 416ci LS2 with L92 heads (365cfm) andL76 intake with a 230 cam. It dynoed 530 RWHP.


What power increase would a 242/242 cam give all else being equal for these two engines.

Is there a rule-of-thumb or something?


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Do you know anyone local in need of an upgraded set of LS7 heads for a good price?

I'm local and looking to sell for $1,750.

Pm me if know of anyone...

Alan

 

The LS7 heads going on my engine are from my builder. But I do know someone wanting some LS7's, I'll ask him if he's interested.

Are the heads 100% complete ready to bolt on?
Have they been ported?

Where do you live?


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None likely, because that is the wrong cam for either of those two cylinder heads

 

x2

 

well, what I was trying to get at is, if this builder is using such a tiny cam that idles like stock, how much more power can be had with going with a cam thats bigger, in that range, like 240's or 250's. Because my 242/242 .610/.610 114 lsa also idles close to stock in my 436ci. I need to pick a cam for him to put in my 447ci LS7 and he wants to use these small ones. I want more power if its worth it because a little lope won't kill me. He just likes small cams because he can make power either way.



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From what I've found if you do the cam right.... zero HP at the top end.

Bret

 

+3......

 

Alright, what cam would you go with in 447ci engine with LS7 heads and 11.5:1 cr? Daily driver. A little lope doesn't matter. Going for as much hp as possible without being too much cam for daily driving and a sheet metal intake.

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That's not a free answer.

 

Apparently not. I guess people just really have no clue. My builder wants me to use a tiny 230 cam that idles like stock, he says the engine will still make 600+ RWHP through my A4, but I can handle "some" lope if it'll be worth the gain. Oh well, whatever he does he does. Ordering my parts right now since I decided on a 447ci with a 4.125 stroke.

This is always a pain in the *** to do


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So you want to run a sheetmetal intake and put a tiny cam inside? That is counter intuitive. Sheetmetal intakes make power on the top end.... and small cams run out of breath up there.

 

Check w/ Trail 70, he tried 3 different cams in his LS7-headed, sheet metal intake 440ci motor. Albeit, higher compression 12.8/1, but his runs could help you with your decision. His thread:
https://ls1tech.com/forums/generation-iv-internal-engine/652857-tpis-427-l92-results.html

 

All through this thread I talk about wanting a BIG cam


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Thanks, I pm'ed him.


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Well it seems like you should pay someone to figure out your cam for you then????