97ta383

iTrader: (5)

how would you think a 02 ws6 a4 with full bolt ons and stock cam would gain with a set of stock ls6 heads and would it be worth it to have them milled to increase compression?

redbadss

iTrader: (4)

stock ls6 heads would give you around 15 rwhp. i would definately have someone mill them to around 61cc for a good compression bump.

Skeet Skeet

Im about to put in a vrx4 cam and Im going to get some ls6 heads and have them milled 20 thousandths and prolly a lil bowl work. Im hoping to be at like 420rwhp or so. Your car should put down some pretty good numbers

Golf&GM

iTrader: (22)

I would think it would be more than that. I know they flow better but wouldn't the 243s in stock form bump the compression a good bit too?

redbadss

iTrader: (4)

yes, stock ls6 heads would bump compression from 10.1:1 to 10.5:1. ive seen different dynos show gains from 10-20rwhp, i was just giving the average gain i have seen.

Sid447

I'm not so sure milling 243's to 61cc,

Is a good idea with a stock cam. Static CR is going from 10.1 up to 10.5 with just the act of changing from 241 to 243.
61cc would put SCR over 11:1 and start the possibility of getting detonation everywhere.

Talk to a sponsor tuning shop for this type of Q.

Jason 98 TA

iTrader: (4)

If you have a set it's not a bad move. Out of the box I'd expect you to see 15hp gains. It's just hard to justify all that labor & $500 for used LS6 heads to make 15hp. We sell the PRC CNC Ported LS6 Stage 1 heads for right at $1000 & they typically gain 40rwhp+ over a stock LS1 cylinder head.

Don't forget the PRC heads are also brand new castings that ship with a performance guarantee!

http://www.texas-speed.com/shop/item...d=649&catid=20

jebuzws6

iTrader: (5)

wow i might just jump on this deal, if i can get my suspension first..pretty amazing

99LS6SS

iTrader: (4)

Not to hi jack or anything, but what kind of gains would you see with a fully ported set of 243's?

Jason 98 TA

iTrader: (4)

We typically see 40-50rwhp from a LS6 cnc ported PRC head install. I'll engine dyno the stock LS6 heads on a stock engine for you guys as soon as I get the new dyno cell up & running.

TwoValveKid

iTrader: (1)

Would the stage 2.5 ls6 heads with ms3 work without a fly cut?

blkbird

iTrader: (28)

I gained 12rwhp and 23rwtq with stock 243's, untouched.

bigboykilroy

iTrader: (48)

NO HP number yet, but I just put on a set of 243's that TEA CNC to Stage 2 and cut to 61cc. No issues here. I Love them !!

Fbodyjunkie06

iTrader: (10)

It would be worth it. If your budget only allows for milling them to increase compression do it. You'll still see 20 rwhp switching from your 241's to 243's. And then later on when money or time allows you could have them fully cnc'd and gain another 20rwhp. Good investment IMO.

'00 formula elesone

iTrader: (2)

just had cam,lsx lifters,pushrods,springs, oil pump,timing and put set of stock 243s and put down 410 rwhp 398 trq. 65+ gain in pwr. Thanks to Geoff @ Next Level Performance....Im very happy with the 243s. I say put em on.

99LS6SS

iTrader: (4)

What do you mean by having them fully CNC'd? Sorry for the dumb question

Fbodyjunkie06

iTrader: (10)

Ported&Polished, valve spring pockets are usually made to accomodate larger springs...heads that are cnc'd flow much better than heads that have not been "worked over".

JDMC5

iTrader: (3)

Wait is that 1000 per head? Your sight says "Base price/ea"


what were your mods at the time?

mike13

iTrader: (27)

I thought 243's and 799's would get you 30-35rwhp? Won't a LS6 intake, heads and cam get you 60rwhp?

Bill00Formula

iTrader: (4)

I had 2002-2003 stage II MTI LS6 heads milled 0.020 and a C1 cam and it made 415 rwhp. It is a 6 spd too.

I now have the same heads milled slighty more, fast intake, LG 5X-3 (can't remember if the 5x is right) and had an electric water and it made around 440 rwhp.