snaad

Hey im new to this hole thing and i am building a 383 ls1. It has dart 225 heads, ls6 intake, 90mm tb, a 238- 242 at 114 at 605-615 lift cam, kooks 1 7/8 headers, and i was hoping it would make good power n/a. If any one would have any idea i would appreciate it. thanks Darrin

smok'nZ

iTrader: (160)

6spd or th-400 or 4l60e?

badpewter-z

iTrader: (4)

460+hp 450+tq
the power under the curve will be great too

BlackScreaminMachine

iTrader: (17)

It should make good power, I dont know if you bought the Dart heads, if you did stick with them if you havent, look in to something from TFS (Trick Flow Speciality)

AINT SKEERED

iTrader: (2)

The darts make power too. its just the right combo to work together though. I have a freind with a 383 with the dart 225 heads that have been massaged for a little more flow and with 11.3 / 1 compression and a 239/243 cam close to yours laid down 425 hp through a unlocked 4400 stall in a th350. car runs 10.9's at the track and traps 124 mph in sea level DA

KONG

iTrader: (4)

You would have a better running car with a smaller head. 225 anything is overkill on a motor with 3.90 bore. An afr 205 or a well ported LS6 casting would be perfect for this application and it would make better power numbers. A 90mm tb will not fit an LS6 intake, it is fact. Just take your time and RESEARCH. Just remember peak numbers dont mean ****, area under the curve is where its at. Good Luck

PewterZ28

iTrader: (1)

I don't think people are ever going to agree on whether a 225 head will make more power than a 215 or 205 head on a 3.9 bore. I had ETP 225s and switched to TFS 215s. I did not pick up any power over my 346 setup despite adding a bigger cam. My car is running 10.2s @ 130 on the motor at 3320 lbs in positive DA. However, it probably would have done that with my 346 setup if I had ever had the chance to make a pass. We'll never know though. For now I'm just trying to figure out why the extra displacement didn't give me any more power...anywhere. In fact, with the same cam I actually lost 15 to 20 rwhp...everywhere.

snaad

Ic well i can just try this set up u can always change things along the way, i am also going to run a 150-200 shot is there a right compression ratio to do that at its not like ill use it all the time just when i need it or go to the drag stip

cdubbzz

iTrader: (11)

+1
let us know how it goes once it's done

edcmat-l1

iTrader: (10)

I've tuned a few to 500 rwhp. One to 510 with AFR 205s. Its all in the combo, and the tune.