1970camaroRS

iTrader: (8)

I'm starting yet another new project, but this one is a bit off the wall. Not going to divulge all of the details, but here are a list of requirements/restrictions:

SMALL car, tiny engine bay
6.0L, head studs, rod bolts, small turbo specific cam *already on hand and must be used*
600hp at crank desired - no more than that, won't be able to put it to the ground...205 rear tire
Pump gas, non-intercooled
Single turbo
Turbo must be T3 sized, small frame - smaller the better
3" down-pipe max
Ball-bearing turbo not required/wanted for cost reasons

If you were wondering why not just do a N/A head-cam build? Idle quality is desired to be near stock. Car will be geared to do 1,800rpm or less at 60mph with a TH400 3-speed auto. This would greatly under-gear a N/A build.

So, what turbo would you choose?

Slow94Formula

iTrader: (18)

I would go smaller cubic inch to work better with a tiny turbo...

1970camaroRS

iTrader: (8)

The other constraint is that the 6.0L is already on hand, so it's going to be used.

Sarg

iTrader: (6)

Can't you at least squeeze a t4?

67maro

The car wont be fun to drive. Your either going to put a big turbo on the car and choke it with what your looking to do or put a tiny turbo and reach its max flow very fast with that big of a CI motor. I would say a Precision 6262 would be the way to go if you still choose this project.

1fastpickup

Be careful with that combo...small inefficient turbos will raise the IATs...combine that with pump gas and no intercooler...it's a recipe for hurting parts.
How do I know? Last year I blew up a SBC with a 58mm T4, non-intercooled on 100 octane, with 20 degrees timing. Broke 3 pistons and cracked the block! High IATs = detonation...and detonation kills.

BMF_Racing

iTrader: (6)

I'm in the works of a very similar project as well, except much bigger DRs (325s). As said before, t4 or go with a smaller cube like a 4.8L. The T3 would even be small for a 4.8 though. If you could do a T4, one of the GTS turbos that PTE made would be much better and they are pretty compact units.

'86 Chevette here, 6.0L with either twin stock GN turbos or a single S475. Either way good luck.

1970camaroRS

iTrader: (8)

I may try to get something like a 70mm T4 to fit, but I'm leaning more towards a 66mm T3. I too am a bit worried about IAT and choking the 6.0L...but that's the challenge set forth. Another thought is selling the 6.0L and finding an aluminum 5.3.

1970camaroRS

iTrader: (8)

I'm dragging home a '63 MGB roadster this afternoon.

BMF_Racing

iTrader: (6)

Nice. You do have less room than me. Do a build thread for sure.

1970camaroRS

iTrader: (8)

I will, but I'm not starting one until after I have some significant progress first.

redss82

Any chance of spraying meth or shoving a small air to water cooler some where? And a 70mm turbo seems to be about the right fit

Chicago TDP

iTrader: (3)

Sell the 6.0, get a 4.8 or 5.3 for half what you sell that 6.0 for.
Get a newer Turbonetics 76 MM with the larger turbine wheel or a Precision 7675
Add some meth nozzles to the intake when you really want to romp on it.

Or, make provisions to run E85 and that will help your IAT's

With a 76 MM turbo and a 4.8, you are going to have 600+ WHP with the right tune even without an intercooler.

1970camaroRS

iTrader: (8)

An air to water is a thought I've had.

600whp is not going to happen with 205 rear tire. I am starting to think an aluminum 5.3 and a small 66mm turbo might be a better fit.

stevieturbo

Common sense says just throw a 427 or 454 n/a build at it. You will have no idle quality issues unless you choose to have them.

Trying to turbocharged a build for such a small increase in power borders on silly, especially when the turbo is just too small.

Of course it can be done though.

67maro

I think you are going to like this setup a lot better. A 5.3 or even a 4.8 with a 6262 or a GT35R should work just fine.

Sarg

iTrader: (6)

Got a good friend doing a 427 in a 69 mgc

HRHohio

These On3 Performance turbos are actually very tiny and compact for a T4 turbo. I have a 76mm and I can't believe how small it is compared to the GT45 or BW's. Something to consider. Mine put down 485 rwhp the other day on the dyno at 10 psi, stock bottom end.

On3 pic: ($319 plus shipping).

http://www.ebay.com/itm/On-3-Performance-76mm-Turbo-Camaro-LS1-LS2-LS3-LS6-LSX-Camaro-Trans-Am-6-0l-5-3l-/140974408414?pt=Race_Car_Parts&hash=item20d2bac2de&vxp=mtr

1970camaroRS

iTrader: (8)

That's interesting. I had considered the On3 before, but I didn't realize they were that physically small. Also, now that I have the car in my garage, its apparent that I have more room to play with than I thought I would. Previous owner already did the firewall and trans tunnel work and revised the steering to swap in a V8. An air to air Intercooler is out of the question though...

Sarg

iTrader: (6)

Small air to water can make things much easier to locate. That and a water tank over the rear tires may help in your application.