Cross

iTrader: (10)

Here is what I know so far:
Stock block 30 over, stock crank, forged rods, hyperetectic pistons, stock heads cleaned up, new valvetrain, RRs, springs, GM847, etc. Compression is stock as well.
ARP Bolts?
Opti and Plug Wires
PCM w/ LT1Edit + Cable
Stock TB
16k on motor
1850

What do you guys think he had really low HP levels. Around 350HP... I was rather disappointed but thought maybe he had a bad tune and he was not sure that he has the LT4KM either...

So I am looking for thoughts on it. Would you pay the price for it? Is it not tuned right or is it the cam possibly?

Thanks! (He says there is more he just does not remember, I think he mentioned Crane for the Valve Train Upgrades and 1.6 RR's and I think he did a 4 Bolt Main but until he gives me all the build information I am unsure).

Also on another note I was surprised the TB was a stock, I also think he did some basic port work too.

myltwon

iTrader: (1)

pretty much a stock rebuild with a cam and overbore?

not bad price and the #'s seem on par for the mods

Cross

iTrader: (10)

Blah def need to cam it better then. Also time for some thinner head gaskets too.

AChotrod

iTrader: (17)

Seems norm to me. oh it has an 847? Maybe a bit low but depend what supported it.

TABBED 5.3

iTrader: (1)

was the 350 rear wheel or crank HP? If it was at the wheels was it M6 or auto? I would buy the motor if it had good hardware like ARP rod bolts, etc.

ss.slp.ls1

iTrader: (36)

350 to the rear in a stalled auto sounds about right, so hopefully it was an auto.

Cross

iTrader: (10)

M6 with 4.10's

myltwon

iTrader: (1)

350-360rwhp in a stock heads/compression gm847 car sounds right for a m6

Cross

iTrader: (10)

Alright new question because I just put a deposit on the whole car as it comes with a lot of extra goodies that way including a twin disc clutch, New Rearend with 3.73's etc. (3500)

With Thinner Headgaskets and an LT4 Style Intake like the Edlebrock one or just a good ported one how would this do or should I be looking at another cam to really get it where I want it? (I want around 480HP at the wheels)

fergymoto

iTrader: (129)

You aren't going to come near 480rwhp NA with anything currently being used in that combo other than the block and maybe the cylinder head cores if they are the right ones.

There is no advantage whatsoever by switch to a LT4 style manifold.

A ported stock manifold might net you 10-15rwhp

Cross

iTrader: (10)

I am surprised considering my original 35 Build was supposed to be around that and it was just slightly higher compression and a different cam. So not even a cam swap will net this vehicle the ability to reach this goal huh. Hmm... Great.... I guess I was alittle broad to think this 35 would be able to get close to the build we were originally doing.

fergymoto

iTrader: (129)

It's just not going to happen with stock heads, or heads and a cam on a stock CI motor not turning some high RPM

Cross

iTrader: (10)

hmm so I need to look into heads and I sold my Ported ones dang it.

Alright well I am picking up an new 52MM TB, Cam (Selling the 847) and I will start looking for a set of heads too.

gregrob

iTrader: (8)

You need to call AI or LE.

Send them those heads and tell them what you want. Just "finding" a set of "ported" heads is a risky proposition.

Also let them spec a cam and port the intake to match the heads and you'll have a runner. Otherwise you might spend a whole lot on a pile of parts that could get walked by a bolt on car.


It happens.

TABBED 5.3

iTrader: (1)

there is nothing wrong with the GM847, it is a great cam in the right combo. It does seem like you are against this cam, which is fine, but the lack of power from this motor is coming from the stock heads. with the right heads 400 should not be a problem on a 355, good luck