BLKSSLSX

iTrader: (1)

Thinking about doing a 418 iron block half filled, prob with a gt42r since I'm
Getting it so cheap. Prob around 9.5.1 compression, l92 heads. I have a
248/258 .649/649 109 lsa cam but don't think it will work. Not really looking for a street car. Anyones opinon is welcome on how well will this setup work.

67Firebird455

iTrader: (27)

The r is good to around 850 horsepower, they make another one that is good to a thousand (GT42RS), and should work decent. What kind of rwhp are you realistically shooting for?

hellbents10

iTrader: (10)

The cam will not work the best and the 42's turbine wheel housing combo will not be ideal if you are looking to make big power.

DrTurbo

iTrader: (3)

A GT42 is only a 74mm turbo. Its going to have a hard time keeping up with a 418ci LS based motor. You need to be running an 88mm at least. Run it on low boost, and it will spool good and make big power on pump gas.

BLKSSLSX

iTrader: (1)

Rwhp I would like to be in the 950-1000 range, that mite be later. The exh housing is a 1.01 I beleave. Getting it for 500 brand new, and I know the cam isn't ideal. Have it laying around, and though I would see how bad it would be. Still something I'm putting together on paper sort of speak.

67Firebird455

iTrader: (27)

Eeesh man, that's not gonna cut it for 950-1000rwhp. You'll need at LEAST an 88, maybe 91 or 95mm turbo for that kind of power efficiently.

DrTurbo

iTrader: (3)

Wow like mentioned above....88 minimum man for a big motor like that. I would suggest a GT5018. We have used these on street car builds for some customers with big motors with great results.

BLKSSLSX

iTrader: (1)

I already know that i would need a t88 or bigger, Just wanted to see what opinons would be about that turbo. Since im getting the turbo for giving out a loan, figured why not put it to some use.

Now how about a cam, hyd or solid and specs.

engineermike

What the others said.

The cid, heads, and cam are for a 1500 hp turbo build, but the turbo is only good for a thousand.

DrTurbo

iTrader: (3)

Take the turbo and sell it for a profit and apply it to the larger one.

67Firebird455

iTrader: (27)

The cam you've got is pretty good sized, and a way low LSA, not the best for turbo, but will work for a drag setup. I'd stick with something in the upper 230's or low 240's @ .050 on a 112 at the very least, preferribly up around 114-115.

Frank02L

iTrader: (1)

I think at least 112 for a turbo LS motor. The GT42 is gonna be way small for this motor to make that much HP. The GT47-88 we were running was probably borderline that kinda power at the crank and that was on a smaller motor. (364") I dont think it would have kept up to a 418.

BLKSSLSX

iTrader: (1)

ok gt42 not an option, and yes stated before drag only. what turbo is best for the build, and not going to cost me the same as buying a new car!

DrTurbo

iTrader: (3)

GT5018 or one of Garrett's thumper's. Their GT-91 is a killer piece with an F-trim and 1.0A/R.

BLKSSLSX

iTrader: (1)

Now with that turbo and that set-up, what hp levels you think i would be at?

DrTurbo

iTrader: (3)

Well over 1000rwhp!

BLKSSLSX

iTrader: (1)

Just wondering, but what about twin 42's? Just throwing something out there, couldn't hurt to ask.

BLKSSLSX

iTrader: (1)

Never mind, i think twin turbos with a 1.01 would be kinda hard.

One of those type and not really think about it ? days.

Unless it's doable.

Frank02L

iTrader: (1)

I think a 418 could do twin 76s

BLKSSLSX

iTrader: (1)

Just something i figure i would throw out there and watch someone say, "Are you crazy".

But def going single unless i want to go twins, but the price would have to be at the right price.

Unless one of you venders out there have good prices for some twins at a very good price, I'll give it some thought!