You might run into trouble with the 42's unless you add Meth. I was running 42's with a intank 255 with 10lbs of Procharger boost and was getting a little over 100% duty cycle (no Meth). For 15lbs I would think you will need 60's.

 

Ok anyone have any 60s they wanna get rid of? Or can i get these 42s modified to 60s?

 

I run 48 lb injectors rated at 3 bar and run 4 bar of fuel pressure, i will be adding a meth kit when i go back together! I may have enough injector but i may want more boost later on!!

 

So 15lbs with 48s and 255 good then?

 

Well I ain't gonna say for sure, I would ask for someone with a bit more of tuning experiance, mine works but the way I understand it every case is different! I get by because mine were flow rated at 3 bar fuel pressure which at 58 - 60 psi like we run is 4 bar so they flow close to 60 lbs at 4 bar! I was told 60 lbs were usually a requirement but tuning is the key!!

 

My fpr goes up to 70psi if that matters.. Also for 3 bar will this do? Ebay item310200056896

 

Nice build LS1DIME. Overall, disregarding the cost of the setup and the motor, what do you think you would have done different, or what would you do to make that setup better now that you have a good idea how it works? ONLYA4.8 I am curious to see how yours turns out.. Good luck. I have a 4.8 truck and would love to see some power be made. Although I need the bed in mine. haha

Jay

 

Well honestly i wish i would have spent more time and had the engine built right and tuned, the turbo system performs better than i set out too! I cant think of spending a dime less on it though! I love the way it looks and performs! It spools instantly, and pulls and keeps pulling! My stock Lm7 crate engine just wasnt up to the task! I didnt know how long it was gonna hold out, i planned on building a new forged stroker engine over the winter!
It was built to show and drive and with a new engine it will be a wild package!!

 

You mean it wasnt up to your tunning. lol

 

Dont hate, i never tuned it period!! I told John at speartech what i was going to be doing with it and he said he could get me a start, but i never tuned it and ran the **** out of it! The motor was intended to only last awhile anyway! John done a great job cause it lasted well considering i pushed the boost up from 12.5 like i told him to 15-17psi, so i wasnt even upset by it!