Ok ,Let me 1st state that I am not 100% sure this is in the Right forum,So if its not it may need to get moved ,I am on the Lookout For a Set of heads that wont Break My Bank Account,So That leaves the Afr & The ET performace heads out,What I Have is a Ls2 402 On a Novi2k Boosted motor that will See 14 Lbs of Boost ,& I am wondering Which of these 2 Sets of heads Would u Guys Reccommend Running & Why ?

The PRC LS3 cylinder This head Can be had for 1,079.00 ,These heads Flow Real Nice : 600 Intake/ 349 Exhaust/ 224 ;2.165 intk Valve /1.59 Exhaust Valve
,I didnt really wanna Get Caught up in Flow #S ,But what else should i consider Besides looking @ Flow #s ? Both sets of heads were Flowed on a 4.125 Bore .I Am Running a 4.0 Bore ,Same With the Patriot Lq9 Head, If u look @ These 2 Sets of heads, U can see that the Tsp -Prc Head Outflows the Patriot Heads & The PRC Head is also available with Hollow Valve stems,Looks Like the Prc Maybe a Better Choice for my Fi Application,I will Run A 72cc ,AnyBody else Running these Heads On Your Lsx Based Motor ? The Patriot Lq9 Flow #s
320 cfm
236 cfm
The Patriot Lq9 Heads Run a 2.08 Intk /1.60 Exh Valve

 

Hey...the best set of performance oriented heads are from CHEVROLET! They are the L92 heads for a truck. The head is based on a LS7 design with outstanding flow characteristics that cost about $180 each (bare) and less than $500, complete in stock form. I am running these on a 6.0L, stroked to 412cid and will be pushing air through them via twin T-62's. The heads have a huge 2.16" int. valve diameter and a 1.59" exh. valve diameter. Off the top of my head I believe the intake flows around 330 cfm @.600" lift. These are by far the BEST for the price! I suggest getting a bare set and building them to suit your needs. Livernois Motorsports sells them complete and CNC ported for around $2000. Simply put...HIGH PERFORMANCE FOR CHEAP!

 

l92's

 

Do these heads \The L92 / Limit what type of Intake i can put on the car ?I thought i read somewhere where u had to run the L76 intake,Or the Ls7 .I am not sure about that thats why i ask.I have a Ls6 intk now,& I was thinking of Going with a Ported Fast,I like the new Starr Product ,I think tHE Starr intake will limit my Upper Rpms on the 402 ,Also i Really Didnt wanna have to Buy New Roller Rockers either ,My ears are Open ,thanks for the replys .I appreciate it

 

L92s, no doubt. On a FI application, the intake being a restriction isn't an issue.


On a side note, proper punctuation is your friend.

 

Are the Roller rockers An issue ,Where i have to change them Out,Not able to use with L92 Heads ?

 

ET CNC'D 243's to a 4in bore
Complete and under 1400.00 out the door

 

The roller rockers are unique for the L92 head. You will NOT be able to use LS1 rockers with L92 heads. GM makes a set for relatively cheap. I have part#'s if you need them.

 

SDPC has ported L92 heads assembled with good springs for about $1200 a pair. That is the best bang for the buck, put on the L76 until the Starr intake comes out.

SDB

 

l92s for the money you cant beat the? i plan to put them on my 418 build

 

LOL...your side note is waaaay 2 funny!

 

starr intake?

 

ya are we making up performance parts? what is a starr intake? is that the weiand intake?

 

Ya that is the weiand intake made By starr Products ,the only problem with running that intake is that from what i understand its gonna be pretty much Done @ 6k ,My motor will make power to 7k

 

can you post the part numbers?

 

Where can you get these heads for 180?

 

Okay...you need all the listed p/n below for the L92 heads from GM if you are going to use the GM rockers setup.

exhaust rockers:10214664
intake rocker:12569167
rocker arm support:12600936
bolts/screws:12560961

The exhaust rockers MIGHT be the same as stock LS1 rockers...not sure so check, you might save some $$.

 

Scoggin-Dickey has them in BARE form for $179.99. Yup, you are reading this right...or you can buy them assembled for less than $500 per head! It was such a good deal, I purchased 3 sets (bare) for flow testing and combination research.

 

This head does have a specific intake manifold. GM p/n 12590123, for L76/L92 head engine, fully assembled, with injectors, fuel rail, 90mm ETC throttle body and gaskets. Not too many aftermarket intakes (for a reasonable price) for this head yet. Hopefully a manufacturer will wake up and see the potential for this need.

 

is the 90mm throttle drive by wire or cable? if drive by wire can it be made cable driven