L76 6.0 questions
L76 6.0 questions Okay I have a .020 over aluminum 6.0 I built . So it's 368 ci. Now .. I was going to go with a set of cathedrals. But...
I fell into a rect port fast 102... How much power could I make out of this motor with a set of ls3 heads, 235/243 .620 cam. And a fast 102?
I know nothing about the "l76" design.. The 6.0 bottom with ls3 top end.
I'm trying to get as close to 500 rwhp as possible . I know cam only ls3's make close to 500. So would this BO doable with stock ls3 heads? It would I need ported ls3 heads v
Thanks
I fell into a rect port fast 102... How much power could I make out of this motor with a set of ls3 heads, 235/243 .620 cam. And a fast 102?
I know nothing about the "l76" design.. The 6.0 bottom with ls3 top end.
I'm trying to get as close to 500 rwhp as possible . I know cam only ls3's make close to 500. So would this BO doable with stock ls3 heads? It would I need ported ls3 heads v
Thanks
LS3 only has you beat by 8 cubic inches or 2%. Treat it like the LS3 and you'll make the same power. That's how it occurs to me.
Last edited by Mercier; Jun 23, 2016 at 06:54 AM.
TECH Fanatic
Joined: Jul 2007
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From: Wilmington, De
With the heads milled .030" and a 227/235 Lunati cam, I put down 470/410 with an otherwise stock LS3 top end on an LS2.
If you decide to do any work to the heads, I would concentrate on the exhaust ports and combustion chambers. I wouldn't touch the intake ports.
If you decide to do any work to the heads, I would concentrate on the exhaust ports and combustion chambers. I wouldn't touch the intake ports.
On The Tree
Joined: Mar 2012
Posts: 131
Likes: 2
Come down about 5 degrees duration on both sides and spec the LSA at 112 to maintain scavenge and useable compression. Any more overlap than that will hurt tq too much on a rectangle 6.0.
Have the heads ported on both sides as it will help airspeed if done right, but don't go more than 5-7cc bigger on the intake, shave the heads 0.020" and run a 0.040" gasket. That should get you to ~ 11.3:1. With that intake and a good exhaust that should get you to 500 rwhp and still maintain drive ability and low end.
Jason
Have the heads ported on both sides as it will help airspeed if done right, but don't go more than 5-7cc bigger on the intake, shave the heads 0.020" and run a 0.040" gasket. That should get you to ~ 11.3:1. With that intake and a good exhaust that should get you to 500 rwhp and still maintain drive ability and low end.
Jason
