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GR-RRR!
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Discussion Starter #1
A friend just did a heads/cam swap on his Z06. He asked me if I wanted (as in free) the old original LS7 heads and cam. Well of course! They don't do me any good on my LS2 but plan for the future? Not sure what all the possibilities are with LS7 heads but it appears building a short block with a big enough bore would still be silly expensive. But, you know, FREE!

And good gawd those intake valves are huge.
 

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Worthless reject member
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37,498 Posts
LS7 heads have gobs of power potential. Get a little headwork, 4.125 bore bottom end, and and a nice big cam, supporting mods... n/a whp out the butt, wut wut?

You can use the stock cam for a lamp stand.
 

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GR-RRR!
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Discussion Starter #3 (Edited)
The more I think about it, it might just be easier to sell the heads and use the $$$ toward something useful for what I've already got. Perhaps long tubes or upgrade the axles stubs and bearing retainers.
 

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GR-RRR!
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Discussion Starter #5
Nah. spend 25,000 on a 454 ci LS so we can live vicariously through you.
Glad to just as soon as you transfer $25k into my bank account. I'll even splurge and put a Maggie on top of it all myself.
 

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GR-RRR!
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Discussion Starter #7

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Manufacturing Engineer
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133 Posts
I got a similar deal. A friend had a pair of LSX-454 6 bolt heads (LS7 as-cast), the LSX-454 cam (236/246 with .648"/.648" lift on a 110+1 LSA) and I already had a set of LS7 Titanium valves and rockers from a past project and added a CHE trunion kit. I picked up a stock LS7 Intake, Fuel Rail and Injectors off of Craigslist for $170.00, that was a steal.

I built a 4.070" LS3 bottom end and put the heads on it. The exhaust valve is what is closest to the bore, not the intake valve. I needed new exhaust valves anyway, so I bought a set of SI Valves solid stainless 1.615" valves (p/n SL-1137), chucked them up in the lathe at work and turned the OD down to 1.590" to give it a little but more clearance.

Despite what everyone says, the LS7 heads WILL fit on a 4.065" bore, but will be very tight. You can also run offset dowel pins on the block, but you'd likely have to make your own. Also, intake port alignment can get tricky if you do this.

My engine with a cam that isn't exactly correct for the combo still makes 505 RWHP. Tuning it with HP Tuners wasn't terrible, but with 21 degrees of overlap, below 1800 is pretty jerky.


Good luck,
Cole
 

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Yes my name is Holden
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450 Posts
Greetings guy; I've been readin' along, thanks for the info. Time to start a post, Ole' Bob.
 
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