Looking for any input on possible turbo set up on a new engine build, 7.1 SoCal stroker, stg2 heads, 9100 cam, 2.25” headers and up pipes, probably a wagler intake. It will be a hot street truck/ drag racing. Fuel for now will be lly 100overs. I’m thinking FI s476/87/.90 in the valley and something over 100mm as a low pressure turbo later. Open to any thoughts or suggestions. Thanks
Turbo suggestions for 7.1 build
- Thread starter Dustin Ellis
- Start date
I plan on running up to 5,000-5,200 rpm. The 96mm turbine would be a t6 flange I think, I wonder how well that would spool on the street with a 96 turbine T6? I would think “guess” the big heads, cam and added displacement would help spooling, anyone have experience with that set up? Thanks, any input helps guysI have no experience with even a mildly built motor let alone this monster.
If you're going to be turning 4500rpm+ and trying to be efficient there you either need a 96 turbine (you can get them in tight T4 housings) or a wastegate. @coker6365 has done some pretty extensive testing and noticed that after mid 4xxxrpm (can't remember the exact RPM) drive pressure starts to climb. That's on a FI 472/491 compound setup.
As for 96 T6 on the street, just don't. I did it for Diesel Power Challenge 2019 and it was a bear on the street. Once you got the thing lit it was an absolute riot and a monster but the transient response left alot to be desired. I think that could be resolved with a tight T4 housing but I never ran one to confirm my suspicion.
As for 96 T6 on the street, just don't. I did it for Diesel Power Challenge 2019 and it was a bear on the street. Once you got the thing lit it was an absolute riot and a monster but the transient response left alot to be desired. I think that could be resolved with a tight T4 housing but I never ran one to confirm my suspicion.
Thanks for the input! Talked to FI and they can do a 476/92 in T4, and they have Black Friday sale going. Might be a good balance between drive pressure and decent street manners. Still considering a few other options though.
The 92 may be but I do not have personal experience with them. When you're ready to get something heading your way there are a few vendors on here (myself included) who are FI dealers and can easily get you squared away.
I personally think a 476 is about as much turbo as you have fuel for with 100s. What stall converter? What injection pumps?
Close to 900 as I can get on single turbo and 100’s then I’ll add another turbo and more injector for 1200 later. At least that’s kinda my plan. I know the longblock is probably overkill for that power level but power is addictive and I’m hard on equipment.
That combo up was brought up by my tuner, my only concern is drive pressure at high rpm with a big compound set up. Just thinking about optimum efficiency room to grow. I really appreciate the feed back.
My power goal seems to be going up, lol I wouldn’t mind 1500hp at all. I’m gunna drive it on the street regardless.
I used to drive a bbc mud truck with a 308 duration cam, 4500 stall manual valvebody th400 on the street. Loved every minute of it.
I appreciate all the comments, this is my first built diesel hotrod and need some different perspectives.
I used to drive a bbc mud truck with a 308 duration cam, 4500 stall manual valvebody th400 on the street. Loved every minute of it.
I appreciate all the comments, this is my first built diesel hotrod and need some different perspectives.
Going to try the fi476/92 t4 over the 491/106, just going to bite the bullet and go compunds and 250%'s from the start as suggested.