:yesnod: and the Z06 heads will cost alot more :smash:
Ported Z06 Vs LS1 heads...?
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Re: Ported Z06 Vs LS1 heads...? (Tuan Le)
DAYUM! On some H/C packages they claim the '06 heads make 30-40 more HP! Maybe they port it differently, or they have to include those hot numbers for some sales reason :eek:
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Re: Ported Z06 Vs LS1 heads...? (MiamiDave)
You could also use the Z06 heads as is, unported. Then there is a difference between them and the stock Ls1 heads. If you can get a used set of heads this is fairly cost effective to.
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Re: Ported Z06 Vs LS1 heads...? (CJS)
LS6 castings' advantages over LS1 castings really shine when you are using a cam with higher lift (~.580+). I believe if you are using a cam that size, you will see 15-20rwhp differences at least and maybe even more as the lift gets higher and displacement increases on the motor.. For a mild or mid size cam daily driver, heads/cam car I think LS1 castings are the best way to go. LS6 castings alone are $1400, so you have to make sure the extra power you are going to get is worth that much money to you..
As for the 6.0L castings, they supposedly have very similar ports to LS6 heads but the chambers are larger, thus lowering the compression ratio. I don't really think 6.0L castings are great for a heads/cam application because there really is no way to regain the compression ratio that you lose from going to them. If you are building a complete motor, then 6.0L heads may be a better choice because you can make up for the lower compression with pistons that have a higher compression height.
[Modified by MattG, 8:11 AM 9/20/2002]
As for the 6.0L castings, they supposedly have very similar ports to LS6 heads but the chambers are larger, thus lowering the compression ratio. I don't really think 6.0L castings are great for a heads/cam application because there really is no way to regain the compression ratio that you lose from going to them. If you are building a complete motor, then 6.0L heads may be a better choice because you can make up for the lower compression with pistons that have a higher compression height.
[Modified by MattG, 8:11 AM 9/20/2002]
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Re: Ported Z06 Vs LS1 heads...? (MiamiDave)
Our LG Motorsports G5 heads flow the following:
@ 28"
LS1 307cfm @ .550
LS6 314cfm @ .550
LS6 Big Block heads 335cfm @ .600
There is about 10rwhp difference between the two. The choice is between a 500 flywheel hp packge and a 510flywheel hp package. That is $110/hp for the last 10hp.
The big block heads have great flow, huge hp numbers at the top end but no low end torque on a small block. The cubes of the 427 make all of the lost torque.
Then again you can go with the 427ci, and that extra 100hp will still cost the extra $110+ per hp, but life is no dress rehearsal.
Thanks,
Lou Gigliotti LG Motorsports
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