gols1go

iTrader: (4)

What's up LS1Tech?! I'm new to the whole turbo thing, just getting my feet wet. I am building a low buck(if that is even possible) turbo car for street purposes. This will not be a track car, however I would like to get the best bang for the buck. I purchased a GT45 over the winter for the build keeping with the whole budget theme, but when I seen the On3 78/76 I ordered one the very next day! So now I have both and here's where my delima starts. I have been following the On3 78/76 thread but not alot of results yet so I guess I'm just hoping someone with experience on proper sizing will chime in as well. My car is:

99 Firebird
Rebuilt(stock) 6.0L LQ4 .030 over
L92 heads
Stock LS3 intake
Edlebrock 90mm TB
Stock 3.42 G80 rear (for now)
03 4L80E (69K miles)
Transgo HD-2 kit
Leaning toward the FTI billet 28-3000 stall

The cam I have is not really optimal for this set up being that it is a supercharger cam- Specs are 228/242 .588/.609.
I know some are gonna say just dump the cam, get another one spec'd for this set up, and get a S480. But right now I just want to use what I have. I do not think I can really be dissatisfied because I've never drove a car with more than 450rwhp, so anything over that should be plenty. That being said I am open to all advice and opinions, just hoping to find some who may have some experience in this department.
Oh, and this will be a front mount setup. I'd appreciate all the help I can get. Thanks in advance! If it wasn't for all the great builds on the Tech I probably wouldn't even have the stuff I do, so again, thanks!

RedRocketZ28

iTrader: (19)

I'd run the on3 turbo. I used the on3 76 on my car when it was first going and made 606/570 on 13 lbs. Switched to a Turbonetics 7875 and picked up decent power. Neither turbo pulled much past 5500 rpm on my LQ4 but it was a fun ride. I think you will make more power with the on3 for sure.

MonmouthCtyLS7

iTrader: (6)

Out of those two I'd go with On3.

mikh338

iTrader: (16)

Really want to know results of the new on3 78/75 on a 6.0 also. Will be Going on my 370 so not much diff from a 6.0. I am worried also about it running out of steam on the top end.

01dropTOP

iTrader: (3)

I'd go with the ON3 turbo, if I were you. What kit/setup are you going to run?

As far as the FTI converter, do it! I got mine (4l60e billet single disc) spec'd from Greg for a turbo setup. I'm still bolt-on, 2.73 gears (I know I know), untuned and it runs HARD. I cut a 1.89 60ft on crappy street tires, leaving at 1k rpm. FTI's customer service and warranty is unbeatable, you cant go wrong with them for sure.

Good luck!

gols1go

iTrader: (4)

With all that said, I guess the On3 will be going on. Thanks!

Building my own hot side. This is my first attempt. I'd take any suggestions I could get on that too. I've been looking at the sticky on building a DIY front mount set up using truck manifolds. I've even v-banded a set. Hoping this thing will work out as planned!





I seen your vids on YouTube. Nice work. I would be satisfied with a 600rwhp work car any day!

Blackpanther99

iTrader: (8)

Go with the ON3.