scotte

Ok I currently have a 4.8l lm4 in a 00 wrangler hooked up to the stock jeep nv3550 5 speed

Engine currently has a radix m112 with the 6.0 pulley on it (12psi or so on the 4.8)

Looking to remove the blower and go to a turbo

Engine has an ls9 cam (not changing it)

Trying to do the sway fairly cheap so looking at on3 turbos
(I have built a turbo ls before so I understand that even a cheap setup isn't "cheap")

Rpm range is 2-6k
Would like full boost by 2500 Rpm (zero turbo lag)

I am fine with less hp overall (don't need 600 rwhp)

I'm thinking 450 rwhp and instant boost would be much more fun as this thing is street use only max boost ~12psi

I was thinking an on3 70mm or a low AR 76mm. Any thoughts?

BLINGOLE

iTrader: (5)

I dont think your get "instant spool" on either of those turbos. Ive done a 4.8 with truck heads and then 317's with the 76 and 70. The lower compression 317 heads were pretty laggy but even with the stock heads the 70 and 76 took a second to spool.

That 112 has to be peppy tho!

scotte

Yes the m112 is instant but very inefficient

I bet I am losing 80+hp spinning the heat pump m112

I am probably gonna sell the jeep later this year but have the itch to turbo something and i have enough left over pieces from the last turbo setup that I can probably switch it over to a on3 70mm for less than the m112 setup is worth used

I think it should be fairly drivable with the 70mm and the 5 speed

stevieturbo

If you want instant, use a supercharger, if your current unit isnt big enough, fit a larger one.

You will never get instant with any turbo setup in the same way you will with a blower.

You may be able to get very fast and responsive with a small turbo setup....but it will never be blower instant no matter what anyone tells you.

JoeNova

Even with a quick spooling turbo, that LS9 cam brings a whole new meaning to turbo lag.

JFR triple 12 and On3 70mm would spool very quickly on a 4.8.

1bdbrd

iTrader: (12)

I think with a small enough turbo you could have immediate spool. My fusion has full boost at part throttle before 2k rpms. You will lose power up top as a result but immediate spool can happen.

A cam swap will also make that better. Not sure why you don't want to change it.

redss82

cams going to suck and why limit yourself to 12 psi? either way id pick up a cheap borg s366 off ebay should be met your power goals and spool the fastest

LS1-IROC

iTrader: (4)

I could be wrong, but I don't think you will find any turbo system that will match the low end torque of a PD blower. And if you did, it would be top end limited just like a blower.

svslow

I agree with this.

stevieturbo

And given he already has a blower...fitted and working, and doesnt care if he makes 450 or 600hp...as long as power is instant. It really does seem insane to want to change to a turbo setup.