JC70SS

iTrader: (7)

So I have my motor all spec'd out. Right now I am running a forged 347 with prc 5.3's and a 224/230 cam. My question is am I going to notice a $5k difference(after selling my motor) between the 2 motors? If it is a big difference it is justified. If not I will keep the 347. Here are the specs

TSP LQ4 408
PRC CNC LS3 heads milled to yield 11.5:1
LS3 intake with 92mm TB
236/242 .600/.610 112+2

Also any guesses on hp?

30th t/a

iTrader: (51)

How much power are you making now? Id guess 425 or so. That 408 setup should make 500-525. So about 100rwhp more for $5000. Plus 408 should have huge gains in the low - midrange as well.

mark21742

I can tell you it was worth every penny I spent on my 408, and I'd do it again. Plus you might even look at going with a bigger cam, the larger cubes really eat up duration....that 236/242 would have somewhere near the manners of a 224 in a stock cube motor.....but then again it depends on what car It's going in, and what you plans are for it.

jetaws6

iTrader: (3)

I say keep yours and put a procharger on it if you're already forged

JC70SS

iTrader: (7)

Been there done that. Belt slip, no gain in low end torque. if I could get a whipple it would be done!

Looks very promising.

JC70SS

iTrader: (7)

Street car only. Going in my WS6.

30th t/a

iTrader: (51)

This guy has a very similar setup to your 408. Heres his setup.

https://ls1tech.com/forums/generatio...102-102-a.html

jetaws6

iTrader: (3)

Well if you already did fi the only other two options for more power are bigger cubes or spray if you have the right rings for it

BlackScreaminMachine

iTrader: (17)

Having cubic inches and a min 4.000" bore are huge advantages. Cam and heads are spec'ed to the motor. A large cam for a 346 will most times be tame for that motor so what you pick would be different.

Johnnystock

iTrader: (6)

I still have regrets on not going on a 408 on my last rebuild.. Next time, I dont care what happens or about my budget, it will be a huge 440 stroker LOL.

Go for a 408..

I went with nitrous to keep up with the big boys! but I dont wanna know what a stroker with nitrous feels like!!

JC70SS

iTrader: (7)

well I decided on a 240/244 cam. Any ideas on #s?

Johnnystock

iTrader: (6)

I know exhaust/induction seems to be a huge factor on stroker engine. Some plp get good numbers, close to 500rwhp, but some other plp are stuck around 450rwhp without bigger exhaust/induction setup.

What is your setup?