Jon@Texas-Speed

iTrader: (18)

I'm proud to announce we've worked out a chamber configuration for guys wanting to run the PRC 227 heads (2.065/1.600" valves) with larger camshafts like the MS3, MS4, & Tsunami!! This new configuration will allow stock cube LS1 engines the ability to run the same cylinder head that our 9.66 heads cam record holder car runs without fly-cutting!!

Here's a pic of a set going out the door today! The cool thing is these heads are on the $200 off special currently!

02sslayer

iTrader: (4)

im currently running the tsunami with 2.5 ls6 heads. my car made 426 on a mustang dyno, how big of a gain could i expect switching to these new heads? will they make my car less street freindly? and how much do they cost?

Jason 98 TA

iTrader: (4)

I'd expct you'll see approx. 15hp gains from the 227 over a good set of LS6 heads. Don't foget to baseline before & after the install if you decide to swap. it's important that you dont use a several month old graph as a baseline for individual mod swaps like this.

Engine_HP

iTrader: (1)

looking good but isnt 227 huge for 5.7L engines

Sales2@Texas-speed

iTrader: (5)

Not really....most of the CNC ported 5.3L and LS6 heads that everyone runs on these 5.7 LS1 engines have larger intake runner (by volume) than 227cc!

Jason 98 TA

iTrader: (4)

I absolutely agree with Matt. Most stock castings end up bigger than 227cc. I've dyno tested them before & if I were building a stock cube engine it would be running the 227s NO DOUBT!

02sslayer

iTrader: (4)

So how much these heads selling for? And I. Thought the PRC 215's were sposed to be the premeir ls1 head from texas speed?

edwardzracing

iTrader: (59)

Looks like 2200 big ones.

http://www.texas-speed.com/shop/item...=1068&catid=40

Look like a killer set of heads. Let me be a test dummy, lol. Turn my F-Body into Utah's fastest, haha. Looks like a good deal, guys. Wish I had the dough.

camz28arro

iTrader: (12)

The TSp Ls6 heads are about 230cc, smaller would be better like a 205-215 but it isn't too big for a 5.7L.

LilJayV10

iTrader: (39)

The LS engines are amazing. I remember when those runner sizes where big for some GEN I 400 SBC motors.

1baaadz28

iTrader: (9)

How would theses heads do on a forged 383 ,fast 102 combo running around 11.2:1 CR with a tsunami cam and around a 300 shot?

TXZ28LS1

iTrader: (5)

i wanna see some comparisons between these new PRC 215/227 head and TFS 215.

99Ls1fever

iTrader: (3)

Agreed