DemonInside

iTrader: (54)

ok SCPC is running a sale on rotating assemblys and i wanna ****** one up before it ends

im looking at this one
http://www.sdparts.com/product/LS2RA...gAssembly.aspx

-2 pistons with 11:1 with 70 cc chambers

couple questions i have are,

- should i order more of a dish piston and get my afr 225's milled so the combustion chambers are smaller? not sure if haveing the same compession with a smaller chamber is any better then with a big chamber

-i want it pump gas safe, im told 11.5:1 is as safe as it can get for 93 octane, how many cc's would my heads have to be with this combo?

-i was going to order l92 gaskets (4.065) or will the ls2's be fine and not hang off into the bore? any one against useing a stock gm multi layered gasket?

-i plan on haveing a pretty decent sized cam in it as well, would i have any issues with such a small dish for ptv clearence?

-lastly if i ever decided to supercharge it would the Manley forged Pistons and
Ackerly & Childs Moly Rings be alright ?

DrkPhx

iTrader: (15)

- should i order more of a dish piston and get my afr 225's milled so the combustion chambers are smaller? not sure if haveing the same compession with a smaller chamber is any better then with a big chamber
You should be good with 2cc valve reliefs. My AFR 225's are milled from 72cc to a 66cc chamber. However, be careful about milling too much. Tony from AFR did the work including addition port work.

-i want it pump gas safe, im told 11.5:1 is as safe as it can get for 93 octane, how many cc's would my heads have to be with this combo?
Depends on the deck height and head gasket. I run Wiseco flat tops with 2cc valve reliefs with a calculated 11.8 static compression on pump gas.

-i was going to order l92 gaskets (4.065) or will the ls2's be fine and not hang off into the bore? any one against useing a stock gm multi layered gasket?
You have to use a 4.130 minimum bore diameter head gasket when using the AFR 225 cylinder head. I use .045 Cometics.

-i plan on haveing a pretty decent sized cam in it as well, would i have any issues with such a small dish for ptv clearence?
Piston to Valve clearance depends on a number of factors. You have to measure for ptv clearance of your actual setup to ensure there is no contact.

-lastly if i ever decided to supercharge it would the Manley forged Pistons and Ackerly & Childs Moly Rings be alright?
I would contact a shop with experience with those rings in that type of setup. There are quite a few sponsors, maybe give them a call.

DemonInside

iTrader: (54)

well not trying to be cheap but why not just use the ls7 head gaskets

since they have a 4.130 and .051

save a few bucks if these will do what i need for the time being and when/if the time comes i want to supercharge it ill swap out the gaskets and put in arp head studs as well

Disturbed Bird

iTrader: (9)

alot of guys including my self run the gm multi layered gaskets they go by the name of mls gaskets if you didnt know. i think they are good and hold up great. i also use the -14cc manley pistons that Scoggin put in my 402

DemonInside

iTrader: (54)

ok ive done some reading, im thinking the -2 cc pistons will be fine for what i want, but i have been reading about quench so im thinking i need a tighter quench to reduce pinging changes. so i was gonna use those pistons some Cometic head gaskets to try and get around .035 quench instead of a .041ish with the ls7 gaskets, figureing if my piston sticks out the hole .010ish, my last 408 stuck out around that so im kinda figureing it to be simular.



-2cc pistons 68 cc heads .045 gasket factor .010 out the hole for a quench of .035 and a compression around 11.6:1

sound about right to you guys? or am i wrong about qhat i read about quench and shouldnt worry?

sorry for the prolly dumb questions im just trying to get this motor dead on this time!

novaflash2002

iTrader: (51)

Not doggin on sdparts, but call up texas speed, and they'll stand behind you for life.

DrkPhx

iTrader: (15)

Sounds right. Here's a good calculator to double check. Tip: Don't buy the head gaskets until the short block is built so you know the exact deck height for your motor.

http://www.rbracing-rsr.com/compstaticcalc.html

Scoggin Dickey

iTrader: (34)

We'll take care of him very well. Thanks

Sales2@Texas-speed

iTrader: (5)

Thanks for the referral!

http://www.texas-speed.com/shop/item...d=885&catid=88

We have a 402 few rotating assemblies to offer as well at competitive prices. Let us know if we can help

DemonInside

iTrader: (54)

Indeed you guys did thanks again, i ordered everythign i could until i put the motor together

Scoggin Dickey

iTrader: (34)

We appreciate it. If you need anything else or have questions, let us know and we'll help you out