blackws620

I plan on submitting an order to TMS for the 370CI. Any suggestions or last minute questions i should ask about? Any last info anyone wants to share with me before doing so i would be glad to hear.

Tainted

iTrader: (9)

yea get the 408

JakeFusion

iTrader: (7)

What are you looking to do with the motor?

blackws620

I gave it some serious thought. No replacement for Displacement. But it would be a lil more costly to do the 408

blackws620

I have 2.5 P&P 243 Heads, LS6 intake, MS4 cam and most other bolt on goodies. Just a weekend Warrior car. M6 with 4.30 S60 Will be gettting racetronix 42# injectors.

lemons12

iTrader: (71)

Since you can't afford the cubes.. Talk to kyle about the +12 pistons. It will really help your compression and offset some of the gains lost by going 370 VS 408. Of course a 408 with the same compression is going to make more but it will help.

blackws620

The +12 Still have the Valve Reliefs in it? Dont have much room for PTV clearance. And what compression ratio will that put me at? im not sure if my heads are milled or not.

lemons12

iTrader: (71)

Yes, the reliefs are huge.

Talk to Kyle about those pistons with your H/C setup and clearing.

KCS

iTrader: (20)

Yes, those pistons still have valve reliefs, but have a small dome as well to offset the volume of the reliefs. With 243's and 370ci, that 12cc piston will put you around 13:1 CR. You could mill some of that dome off, which most machine shops will charge around $50 to do, to fine tune your CR down to something more pump gas friendly.

Or, you could use Wiseco's K398X3 piston kit instead to get about 11:1 if your chambers are still 64cc's.