19trans_am98

iTrader: (3)

ok guys here's the scoop as of now i have a 347 shortblock....stock crank forged h beam rods and wiseco -11cc dish pistons....needing advice on what heads & cam to go with....topped of with a vic jr and a 90mmtb....and a master power mp4598 turbo....we have a lot of guys running an 8.5 tire class around here....needing to get this car into 5.60's in the 1/8th....what do you guys think? i know that the turbo will have to be changed but im looking to get the bugs worked out with this small turbo then step up to a bigger one say a 80-88mm?

black98ws6ta

iTrader: (77)

It is definitely possible, my car has been 5.96 on a stock shortblock/heads and 60'ing like a turd. If the car is light enough you could go that number on fairly small turbo.

DrTurbo

iTrader: (3)

You will need an 88mm unit to reach that level of performance. A MP unit will not make any power close to what you need. If you push it, then expect it to come apart.

88mm is good for solid 5.4's with a properly set up car. And faster if everything is perfect.

Pro Stock John

iTrader: (34)

I went 5.9 with my old setup, and I pretty much didn't know what I was doing.

I'd buy aftermarket heads with a thicker deck they won't lift as easily as stock heads.

Sandmann120

iTrader: (1)

What are some other 5 sec 347 combos? Anyone do it on spray much?

Sandmann120

iTrader: (1)

What size turbo? Any more details on your build?

kp

iTrader: (34)

I've had two in the 5s with a 347, LS6 intake, smallish cam etc but I used a procharger.

60' is the tough part when looking for 5.60s, I'm sure its possible with the right turbo and a light enough car.

Sandmann120

iTrader: (1)

Good to know. been trying to decide whether or not to leave mine as a nitrous setup or go turbo. Looking for 5's to be competitive in a local 'street car' class here in Iowa. Mid 5's should get me solidly in the field.

Josh@PremierAutosports

iTrader: (11)

Does the class limit you to a certain size turbo wheel limit or pill size?

Sandmann120

iTrader: (1)

Not at all. Any engine combo, any power adders. Stock style suspension, no wheelie bars, drag radial or 10.5 tire. Low payout to keep out the heavier hitters.

black98ws6ta

iTrader: (77)

Turbo was a s480, here is the biggest collection of info I have on the car.

https://ls1tech.com/forums/forced-in...hortblock.html