Small Bore LS7 Heads - Available Now..
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
SCR 11.2-11.5 (DCR=8.6-8.9)
1 7/8" headers x 28-32 long primaries and a merge collector
4.10:1 gears
...cam mildest for this - 234 / 242 @.050 .644 / .652 - 113+3 - great all around from 3,500-7,200 RPM - big lope, pretty good street manners - but I'd stay out of So Cal bumper-to-bumper 405 traffic.
...cam wildest - - 242 / 248 @.050 .656 / .666 - 114+2 - serious street and drag race 4,000-7,500 RPM - nasty sounding, great to cruise the boulevards and race - but otherwise...
Melting Slicks
Joined: Jul 2007
Posts: 2,052
Likes: 14
A few factors to consider, headers, Static Compression (more to the point the Dynamic Compression Ratio)...but for a 6.0 liter here's what I'd build or recommend.
SCR 11.2-11.5 (DCR=8.6-8.9)
1 7/8" headers x 28-32 long primaries and a merge collector
4.10:1 gears
...cam mildest for this - 234 / 242 @.050 .644 / .652 - 113+3 - great all around from 3,500-7,200 RPM - big lope, pretty good street manners - but I'd stay out of So Cal bumper-to-bumper 405 traffic.
...cam wildest - - 242 / 248 @.050 .656 / .666 - 114+2 - serious street and drag race 4,000-7,500 RPM - nasty sounding, great to cruise the boulevards and race - but otherwise...
SCR 11.2-11.5 (DCR=8.6-8.9)
1 7/8" headers x 28-32 long primaries and a merge collector
4.10:1 gears
...cam mildest for this - 234 / 242 @.050 .644 / .652 - 113+3 - great all around from 3,500-7,200 RPM - big lope, pretty good street manners - but I'd stay out of So Cal bumper-to-bumper 405 traffic.
...cam wildest - - 242 / 248 @.050 .656 / .666 - 114+2 - serious street and drag race 4,000-7,500 RPM - nasty sounding, great to cruise the boulevards and race - but otherwise...
Thank you-
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
Notes:
I'll do some prelim setup on how these stack up on p/v clearance - they will be much more friendlier in this regard, compared to LS3, because these have the 12º valve angle
You can sell the Fast and buy a factory LS7 manifold - you will probably make some money in the exchange
Last edited by C_Williams@RPM; May 1, 2011 at 08:32 PM. Reason: corrected error 12º was 11º.
Melting Slicks
Joined: Jul 2007
Posts: 2,052
Likes: 14
call me when you are ready to order - it will take 4-5 working days on CNC, Valves,etc. -
Notes:
I'll do some prelim setup on how these stack up on p/v clearance - they will be much more friendlier in this regard, compared to LS3, because these have the 11° valve angle
You can sell the Fast and buy a factory LS7 manifold - you will probably make some money in the exchange
Notes:
I'll do some prelim setup on how these stack up on p/v clearance - they will be much more friendlier in this regard, compared to LS3, because these have the 11° valve angle
You can sell the Fast and buy a factory LS7 manifold - you will probably make some money in the exchange
I'll keep in touch now that I know which way to go
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,404
From: Bethesda MD
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
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Burning Brakes
Joined: Jun 2008
Posts: 1,214
Likes: 3
From: CA
Hey Charlie-
I guess I found my next set of heads for my new combo. Seeing how they are 11 degree heads means I can mill them even more than the LS3s to bump up the compression ratio. I'm really looking into switching over to E85 so I want to get as close to 13:1 compression to fully take advantage. Guess I'll be selling my LS3 topend combo.
I don't recall the exact specs of the cam you sold me (ZZ-014) or would it be better to get a bigger cam. I really want to squeeze as much as I can out of the stock bottom end but I still like to enjoy the car on the streets.
-Daniel
I guess I found my next set of heads for my new combo. Seeing how they are 11 degree heads means I can mill them even more than the LS3s to bump up the compression ratio. I'm really looking into switching over to E85 so I want to get as close to 13:1 compression to fully take advantage. Guess I'll be selling my LS3 topend combo.
I don't recall the exact specs of the cam you sold me (ZZ-014) or would it be better to get a bigger cam. I really want to squeeze as much as I can out of the stock bottom end but I still like to enjoy the car on the streets.
-Daniel
Last edited by Sparo2; Apr 29, 2011 at 04:14 PM.
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
)
Racer
Joined: Jul 2007
Posts: 384
Likes: 0
From: Suffolk Virginia
The TFS heads are an LS3 head, but with all the heads coming out in the coming out soon it would be nice to see a good comparo on the same motor. Im building a ls3 based 427 here soon and the only real thing holding me back is head choice. TSP is making a small bore LS7 style head along with an LS3 head. Then there is you guy's small bore 7 head. So this is a good time be paying attention. 
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
So yes, 12º - and all the LS7 1.8:1 rockers are a bolt on.
Burning Brakes
Joined: Jul 2002
Posts: 791
Likes: 52
LS7 Valve Angle -12º - I looked at the design sheets to be sure - now I feel like dunce because Iv'e got to look over some previous posts and make a correction - I've been stating 11º and I need to correct that.
So yes, 12º - and all the LS7 1.8:1 rockers are a bolt on.
So yes, 12º - and all the LS7 1.8:1 rockers are a bolt on.
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
I've got several LS3 projects in-house, so I don't need any of those.
If you have a 6.0 or a 402, I'd possibly be open. But, bear in mind that this much cylinder head (on a 6.0) needs a truly optimized setup and 4.10:1 gears.
