TonyG

They have a different cnc program for the 243 head vs say a 241 / 853, obviously because the ports are a different shape to begin with.

That is the cost for the porting. If you want the heads rebuilt, then that would obviously be additional.

TonyG

docwyte

What are the quoted gains on a set of 241 heads?

TonyG

There are not "quoted gains" but you can expect about 25-35RWHP depending on what other mods you have.... and that's a great deal.

I'm not sure what cam you have, but if you tell them, they can tell you if you can mill the heads or not.

It's too bad you don't live around here because they have the fixture to cut valve reliefs in the pistons without removing the pistons with perfect precision and only takes them about 1-2 hours once the heads are off the car...

TonyG

LS1Porch

You might as well just get these:
http://texas-speed.com/p-1172-prc-st...ted-heads.aspx

The 5.3 heads are about equivalent to the LS6 heads to begin with, and these are brand-spankin' new GM heads with a CNC port and flow numbers to boot.

TonyG

Not bad, but the question is... how much power are people making with these heads.

I make 465RWHP and 400RWTQ on 91 pump gas on my LS6. Big cam, 102mm intake, 92mm TB, RH headers, dual 2.5 exhaust, larger injectors.

Peak HP at 6800rpms, Peak TQ at 4600rpms. Over 350RWTQ from 2800rpms to 6800rpms.

TonyG

Sirenty

1988 951 with a 2001 LS1. I've enjoyed the hell out of it but it might be for sale soon.

vt951

Nice cars on this thread, to say the least! I didn't know there were that many v8 swap guys on here.

Please add me to the OFFICIAL v8 registry (not the unofficial one).

366 rwhp and 367 rwtq
engine is an LS1 out of a 24k mile 2000 Corvette
mild cam: 225/229 .580/.585 114lsa 110icl
LS6 intake
28 lb injectors
Comp Beehive valve springs
chromoly pushrods
Melling HV oil pump
LS2 timing chain
LS6 valley cover
Norris oil catch can
custom intake tube with relocated TB and 3" K&N filter
relocated coil packs under header panel
custom modified S&P headers
custom 3" exhaust with Flowmaster Outlaw pre-muffler and Magnaflow muffler
Wizard Cooling radiator
BMW 635csi hydroboost system
AOR trans
custom trans brace
big red front brakes, stock turbo rears
300# front coil overs / 28 mm rear torsion bars / Koni sport shocks / M030 sways
no spacers on my cross member

LS1Porch

I heard about them on the Camaro boards, they've got a good reputation. Texas Speed also sells CNC ported LS6 heads, but the LS6 flow numbers are almost identical and naturally they cost a few hundred bucks more.

Some day when i need a rebuild i'll pick a set up, but for now i'm happy with my power level.

TonyG

Hey... I'm not saying that there aren't better heads out there. Honestly.... I really don't stay up with it. I was going to buy a set of AFR heads and be done with it, but got talked out of it based on their claims and the price. I figured I'd let them cnc the heads and see what happens. If they didn't perform, I'd just buy what I was going to buy anyway. Turns out.... they perform. That's why they are still on the engine. And all on pump 91 gas (which saves me about $2500/year vs race fuel).

So... zero problems, good power, wide power band, cheap gas.


TonyG

LS1Porch

Oh yeah, if you've already got a good set of heads then $600 is a great price for CNC porting. If you've got a lesser set of heads or yours are in need of a good rebuild, then the 5.3 heads are a pretty good deal. Anyways, didn't mean to veer this thread off.

Techno Duck

Looks like Volk TE-37's.

drift a 944

This is not my car but I work on it frequently at work. Figured you can add another to the count - not sure if he's on Rennlist though.

LS1Porch

Very cool. Like the wiring tuck. I'm interested in seeing closeups of that brake/clutch master setup if you ever get a chance!

OEMTim

^Same here.

zeusrotty

Me too!