Assume clone has the same size as the larger FI units? That's with the big hotside, stage 3 turbo cam on a 5.3L. I think it spools pretty good for what it is, not as laggy as the T4 cast 88mm I had.

My stuff never spools this low. I think driving a tank might have something to do with the super low initial spool times you see! :lol:

I load mine plenty with a 3.25 gear 30" tire and 1.76 1st gear... Still, at 3000lbs I don't start making positive pressure till 3k+ on any turbo I've run. Small 1.10 t4 s476, S476, S480 etc... Of course if I'm on the trans brake at 3800 popping and banging I'm at 10lbs in no time... so that was never a factor for me... I tink I'd hate a manual trans in mine anyway.

You also run low enough compression that you could run mid 9s on 87 octane lol.

That was only the first engine with 8.6:1 it was a bit doggy out of boost. :lol: The 3 engines since were 9.5:1+.

2 tons of fun!

I just hooked up my two step and at 3500RPM and 35% throttle I can build 6-7lbs on jackstands before I glance over at the computer screen. Should get this pig going a little faster leaving on boost!

I can open my wastegate at 19 lbs with 2 step set at 3200 on the sloppy trans brake.
I wonder how the billet 84 would compare to my billet S475. Its starting to smoke, so I need a new turbo lol.

Ya auto is certainly more load and easier to build boost. I could footbrake as much boost as I wanted on the old setup, but much over 10 would blow the diff out.

Weather looks good so hopefully have some positive results Saturday.

Any luck?

84 makes more boost for sure... but couldn't get my clutch to hold it.

What clutch are you using?

One of the Monster LT1 twins that's been letting me know its not happy since the first track day it saw. I'm getting a McLeod RXT proven to work and hold more power.

https://cimg4.ibsrv.net/gimg/ls1tech...d4a95afd4d.jpg
https://cimg6.ibsrv.net/gimg/ls1tech...7f24e2fcc3.jpg
In preparation for the 400 today, this is what I found. Not trying to hijack, just wanted to share. Funny thing is this clutch STILL wasn't slipping. Shout out to Monster lol.

Loved my McLeod, flawless for years

You can upgrade the Monster to hold more power and it will cost less.:cheers:

In preparation for the 400 today, this is what I found. Not trying to hijack, just wanted to share. Funny thing is this clutch STILL wasn't slipping. Shout out to Monster lol.[/QUOTE]

That has seen some heat. Thanks for the post!!:cheers:

Any updates on this ?? Anyone else trying this turbo?

Really hoping for good results from this, has anyone else got one yet?

I'll be ordering mine this week

myself and a few others on here have used this turbo.I also switched from the 78/75 cast to the 84mm billet. I can say that the 84 mm shines in the midrange,and spools slightly faster. I havent had any issues with the On3 products,no shaft play after repeated abuse. if I had to nitpick then 2 things Ill mention. Seal the compressor side very well before use(both turbos) when received woulve had boost leaks if you simply bolt on and go.I used red permatex and cured 24 hrs before firing up initially. 2nd..the turbos are really quiet compared to other brands. having the filter on/off makes a substantial difference in both spool and sound of the turbo.

Other than that..good bang for the buck. Here is a dyno of the 78/75 on the dyno:

And here is the 84 billet on the dyno around the 6 min mark: