Cary@Perf-Induction

iTrader: (1)

On our 11 degree heads 215,225,240,255 all use stock rocker arms with the exception we supply a billett rocker arm pedestal to properly align the rocker arms and the height. If Scott or Brad get their pics up here shortly, maybe they will put those in too. But they are not offset. Our 265 does use an offset rocker (avalible from Jesel) Racer net at 1430.00 for the mohawk series. We will offer them cheaper with the cylinder head purchase. All of these will fit a stock style manifold as well. Our LS7 is very similar to the GM LS7. We offer them set up fot the Jesel C5R style rocker right now until the GM rockers are readily avalible. the price on 225 fully assembled with SEVERE DUTY valves and hyd. roller springs is 2475.00 C5R and LS7's will be under 3500.00 complete

Wet 1

iTrader: (4)

How soon on the 255's guys?????

Thanks!

Brian Tooley Racing

iTrader: (13)

Congratulations on getting your heads to the market, the LS7 stuff should be awesome. Are you still sending me a pair of your best 5.7 Liter/3.90 bore head to test? Congrats again to some of the best guys in the business.

BTW, I think I've got something for you

gollum

iTrader: (1)

No matter how well a ported CATHEDRAL head flows with radiused plate, moulded clay opening, or what ever. The cathedral type LSX heads air flow is limited/restricted by our OEM LS6, LS2, or Ported Aftermarket FAST intakes (Less cross section area?). Someone needs to DESIGN A NEW INEXPENSIVE HIGHER FLOWING INTAKE before designing another high flowing LS1,LS2,LS6 cathederal type head.

The above statement is why the NEW LS7 intake and head design looks way more interesting to me. Until then I choose to use nitrous with my stock LS1 cathedral heads

BTL FED

iTrader: (9)

Well since everyone is showing pics, here are my pics of my 265's in progress

DAPSUPRSLO

iTrader: (14)

Cary, quick question. Does rolling the valve angle back to 11 degree lengthen the port at all? If so it would also be good to note that 224 cc's in this head (ET Head) actually results in less cross sectional area then a comparable volume (CC) standard 15 degree ls1 head which means higher velocity relative to a standard 15 degree 224 cc head. Great work guys!!!

Cary@Perf-Induction

iTrader: (1)

As a matter of fact, yes it does.

Brandon Boomhauer

iTrader: (10)

gorgeous!

Mike TexaSS

iTrader: (2)

G-Force is proud to be an ET Performance cylinder head dealer! You guys can feel free to contact me for pricing information. These are some of the best cylinder heads available to the public.

jrp

iTrader: (16)

are those copper beryllium seats?

BTL FED

iTrader: (9)

Yes they are

ls1nos

how soon on the 255's Thanks

Cary@Perf-Induction

iTrader: (1)

we have all of our port and chamber models done and digitized. we are going to be achining 215,225,245,255 next week. we are shipping all of our 265 back orders along with some of the others next week.

383ss

iTrader: (14)

what is the application that each runner volume is 'intended' for? that is a lot of options and a TON of configurations!! can you give a quick rundown please!?

I'm guessing with my hydraulic roller 408 peaking at 6300 I would probably want a 255. Are 11* always going to benefit power?


I've searched but not found this info anywhere, THANKS!!

Cary@Perf-Induction

iTrader: (1)

215---mild 5.7 street stock style manifold 2.040 intake valve. 320 peak flow

225--- this will be the most common ls2 replacement and 5.7 for the guys that can get by the myth that 225 is too big for a 5.7. 2.080 332 peak flow

240--- this port is very universal, hot 5.7 but would work est on a power adder 5.7 or a 500 plus rwhp 402. I would at the least use a fast 90/90 setup with these, a carurator would be grat too. 2.080 or 2.100 valve is the option,
346cfm peak intake airflow @ .675 lift

255---this is our hottest cathederal port head using stock style rocker arms. it is very similar to the 265 but still has a restriction around the intake pushrod hole. 2.100-2.125 valve size. this head is good for a real hot 402 or larger, avalible with any bore size, it would be great on a 427 street car. this cylinder head peak flow is 360 at .675 lift. not too far off from the LS7.

265--- This a good large cubic inch cylinder head. or a very high rpm small cubic inch . this configuration uses a rocker arm system very similar to the c5r, the rocker arm boolt downs are moved to a c5r configuration and uses a 7/16 bolt down this head has seen the 380 cfm range, but is sensitive to valve shape and seat angles. most of our pieces come off the machine in the 370's which is still very stout. 2.100-2.125 valves are standard with a 1.570 or 1.600 exh.

hope this helps

BTW we are still developing our new intake manifold to really take advantage of these higher flowing versions. I hope to have a prototype at the pri show.

and for the corvette guys that have viper friends, we also have our new "Viper STRIKER" cylinder head avalible in october.

Cary@Perf-Induction

iTrader: (1)

Just to let you guys know that have been to our website and not found anything. We do have all of our flow numbers up there and our homepage has a pic of our LS7 head ontop of our 265

www.etheads.com

383ss

iTrader: (14)

awesome, thanks for the info. looks like I could possibly use a 265, but its going to be quite a bit more $$$ for not a lot of gain on my low rev motor. I'm sitting at 550rwhp now and have MAXED out my current 5.7L ported heads.
cool news on the intake, I had no idea on that either

jrp

iTrader: (16)

i suggest you copy/paste this and keep it handy cuz i predict you'll be answering this question a TON in the future.

Ben R

I agree here. A lot of people want to know what port size is the best for them.

383ss

iTrader: (14)

I would suggest cary et performance just starts a thread with the info even in more detail. head options also. what they expect out of the titanium valve option, the stage 2,3,4 spings, copper seats. I'm going to call and ask for my application, but I'm sure a lot of guys want to know what benefits all of those will give. and when they are most needed.