darrensls1

Trying to decide which short block would best compliment my ETP 215 heads. Cam will be custom built after the fact so I only need to match this up to the heads and 150 NX wet kit. I was looking for something that can support 550-600 rwhp on the spray.

I was thinking about the Speed Inc 348 with diamond pistons and rods for $2,800. I know TSP has a forged 347 for the same price but Texas is a little farther away then northern IL so I might get a little cheaper freight from Speed inc.

I was also thinking about doing a aluminum 383 but who builds a decent forged one for a reasonable price?

darrensls1

Oh and I forgot to mention the car is also getting a Fast 90/90 setup.

darrensls1

It appears I have a 3 way tie

1 last 1

iTrader: (1)

Go with an iron 408 and throw as much of the nitrous on it you can afford.

LostCauseZ06

iTrader: (4)

iron 408, HPE out of texas builds a TOP notch product... i flippin love mine!

scotts94_z28

215 heads probably arnt enough to support a 408 and may be even on the small size for a 383 and as for your goals of 550-600 hp that should be no problem with a 347 and those heads with a nicely matched cam along with that 150 shot

darrensls1

This is kind of what I was thinking. I think the 383 would work ok with those heads and a more aggressive cam but is the gain worth the extra 1-1.5K is the real question.

zigroid

iTrader: (22)

Id personally go with a stock displacement LS2.

darrensls1

That was my very first thought too. Aluminum 6.0L 402 short block. But the ETP 215's just arn't enough heads for anything greater then 383 CI (so I have been told). The way I see it right now I have three choices:

1). Get a forged 347 from one of our sponsors and stay with stock cubes. This is appealing since these short blocks are as little as $2,700.

2). Step up to a 382/383 short block and have the warm fuzzy feeling of knowing I at least increased my cubes a little since I was going through the expense of a new motor any way. From what I see this will run me $4,500 (still trying to find a better price).

3). Sell my ETP 215 heads (probably for a slight loss) and then buy different ETP heads to better match a 402 or 408 short block. I'm guessing $5,000 at least but I have not priced these out yet.

I am kind of leaning towards number two as it seems a nice "compromise" of performance and value. I think I'll call LME later this morning and get thier advice. Me =

zigroid

iTrader: (22)

I meant use them on a stock displacement LS2 with stock crank. then down the road you can upgrade to a 402 since you already have the block.

thats what Im going for.

darrensls1

I talked to Bryan @ LME this morning and gave him the 411 on my situation. He told me that even with the 215 heads I would be leaving 20-30 rwhp on the table by doing a 383 vs a 402 or 408. After a good 15 minute conversation I think he has talked me into a LS1 402 Iron short block for my car.

I really didn't want the extra weight in there but an extra 25 rwhp more then compensates for 100 extra pounds. Plus it's the same price as thier 383 aluminum short blocks. This is going to be one fast car when I'm done

Asmodeus

A 6.0L is not a 402, a stock LS2 displacement is 364ci. The bore is bigger in the LS2, that is all.

I'd go with the 347 if it was up to me.

scotts94_z28

to late im pretty sure hes going in a much different direction

CraZee ZO6

347 forever!!

500 on motor 750 on shot why need more! LOL

darrensls1

You ain't lying. How about this for a turn around:

1). The ETP 215 heads were sold for a $300 loss

2). ETP LS7 heads were purchased for a whopping $3K+

3). LS7 intake and 90mm TB is incoming which flows better and is cheaper then a fast 90 setup

4). LME 408 iron block is replacing my stock bottom end.

5). Original cam was sold and new cam will be ordered shortly. Probably a more suitable 408 size cam like 240/244 110 but that is TBD.

6). 100-200 shot of N20 will be on top of this allready sick *** motor.

7). I'll probably be divorced by the end of the year if my wife ever finds out how much I spent on this car

Thanks for all the help guys. This is why LS1tech is THE BEST f-body site on the internet

scotts94_z28

Saw some of the pic's the NEP guys posted up on www.newyorkfbody.com if you arnt a member there you should join up and I better see this car at NYIRP this summer. I saw you there last year even lined up next to you a few times I believe I was in the red SS

darrensls1

I'll be living at NYIRP this summer. The way I see it, this is just the beginning.

scotts94_z28

should be a real fun car. what are you doing for the tranny and rear end?

ceo44

Send your heads back to ETP or TEA and have them open up the intake to 228-230, then you don't have to worry about getting new heads and you now have a real torque monster. They do this all the time.

Ksett

Save your money and get the forged 347 for your goals. You should be able to easily make 600rwhp with a 150 shot. If you want more up the shot and be done with it.