jayyyw

I've been toying with the idea of going FI in the way of a centri charger. How high are you safely able to spin a headunit?
I currently spin my motor to around 75-7600 rpms. I spray till about 7400rpm.

Current setup:
Holley Hi Ram
RPM B3 cam
e85
ID1000
Walbro 450
ARH 2" headers are on the way
Ported/Milled LME stock casting heads
Stock bottom end LS7
Nitrous

I make around 830 on nitrous right now. My HP peaks at 7200rpm and would love to still be able to rev the motor out.
Would I just not need to pulley down as hard, so I won't over spin the blower?

I believe I have enough fuel to support 800whp on boost.

I guess the only thing that really concerns me is the cooling portion of it all. I live in Texas where it's 100+ degrees all Summer long.

gameover4

your exactly correct, blower speed/pulley size is calculated from crank size and max rpms. I live in new Orleans so i can attest to the heat issues. I have ysi/lsx iron combo and have lowered rad support/ DP3E fans/ moshitmoto radiator and has curved the heat issues thus far. if your making back to back to back hits it will require you to either drive around let cool back off or kick ac off and lowers much faster. i have yet to be able to get it in the 230 since adding the radiator. with just the fans the ac had to be off in heat/traffic and had to be off to make hits and get it to come back down.

jayyyw

Anyone use an electric water pump with a blower?

Unreal

Some people have, typically needs a little bit of fitment work.

Like Gameover4 said, just need to pulley for it. I've spun 7500 on my car.

Budget in the Prospeed fans and radiator, so ~$1500 just in that.

jayyyw

Your YSI is maxed out also, right?

Unreal

Spun like 20-25% over

jayyyw

So, I believe this is what I am going to go with:

Forged LS3 short block
Ported LS3 heads
Holley Hi Ram
90mm TB
Custom cam
A&A YSi kit with 8-rib setup, 10% overdrive balancer, and 3.125" pulley
ARH 2" headers
Relocate alternator to where the a/c compressor is and run it off the crank
ID1300 injectors
Fore fuel system for e85
Prospeed fans

Reving that pulley setup will put the blower just a tad over the rated 66,000rpm at 7500rpm on the engine

Unreal

Zero reason not to just do 10 rib from the get go.

jayyyw

Will look into it. Everything else look ok?

ZincGT

no bashing, but why a high ram?

Detoxx03

Patriot Six

Unreal

He already has a high ram on the car, and it will work great. Might as well keep it since it is on there.

Better question is why mess with alternator?

jayyyw

Yes, I already run a hi ram. I will need to switch to a LS3 port hi ram from the LS7 one. RPMs help close the gap with less power, from what I've experienced so far in the N/A realm. It may or may not work/translate into the boost side but I'm willing to try. It's mainly a roll race car.

I don't run power steering. Much easier to relocate the alternator than deal with a secondary drive.

C U IN REARVEIW

any clarence issues with the 10 rib setups?