Non-Intercooled Turbo setups

[kcw 1]

Awrite folks

I'm wondering if it'd be worthwhile running a low boost non intercooler turbo set up with aquamist/methanol to keep inlet temps down as an alternative to a supercharger set up?

I'm looking for 300lbs/ft but cant afford a full on turbo set up with a solid bottom end. If you have any ideas or thoughts on this please post them up.

Thanks, Ken

Edit: I've seen a similar setup on a red Vento VrR6 turbo with a heavily smoothed bay but can't find pics at the minute.

[Phat VR6 3]

Is this the one?.... looks MINT

[kcw 1]

Aye thats the very one I was talking about, cant seem to find any specs on it, I saw it featured on a U.S. website I'm sure but cany remember anything about it.

Anybody know anymore?

[Bobtrude 0]

thats a nice piece of engine!

[UnitedMotorsport 55]

Running low boost with no intercooler is fine.

Alot of guys in the USA do it.

We are currently working on our RHD stage one turbo kit, and that is a low boost non intercooled setup.

[VR6Pete 1,455]

what price are you looking at for that sort of setup C2Motorsport?

[kcw 1]

PM'd C2 Motorsport.

That red one is actually intercooled I found a feature on it, its got a horizontally mounted Spearco intercooler just infront of the gear box, makes good power, 297bhp and 315lbs/ft of torque . . . at the wheels.

[FishWick 21]

With how much boost? Take American whp claims with a pinch of salt.

Personally I would never run a turbo without an intercooler, but that's not to say it doesn't work. It does, but watch what happens to the power and torque after you've run it on the dyno 5 times, then compare it to the first cold run.

I've watched OBD1 take 17 degrees timing out on boost on a stage 1 kit (not C2's). It's just not worth it. If a job's worth doing....... even VW see fit for an intercooler on their 8psi 1.8T engines.

[kcw 1]

You recon thats the case even with aquamist/methanol?

I'm really after as tidy an install as possible.

Edit: Doesn't say how much boost the car's running.

[UnitedMotorsport 55]

Water/meth injection will help to keep things cool

Running a turbo at low boost with standard compression, is no different to running say a vortech charger with standard compression and with no cooler.

[Bobtrude 0]

Wouldnt the heatsoke from the exaustpart of the turbo be more signifficant than the vortech?

I would go intecooled aswell, of a hoodscoop or something to keep the temp down. I have a small heatproblem with mine and thats even with IC.

[UnitedMotorsport 55]

Bobtrude: What problem with heat do you have?

[Bobtrude 0]

With the original intake, when i drive its ok, but if i stop the heat from the engine heats up the manifold and its noticiable less responsive and feels weaker. then when Ive driven some it cools down and is ok again . . .

Will get heat shield for the airfilter soon aswell. . . .

[FishWick 21]

Motronic 2.9 has a very slow response time on the Intake air temp sensor, around 10 seconds to update. The poorly designed sensor itself heat soaks aswell, which can falsify the reading.

This means the air compensation map is pulling fuel and timing for longer than it really needs to.

VW addressed this on the 1.8T with an instant updating air sensor, but sadly it faults out to 70 deg C on Motronic 2.9. It only works on Bosch ME7 or standalones.

I take out 15% timing and 5% fuel if the IAT is 70 and it does feel a little sluggish until the intake cools down.

The fuel in the rail tends to bake when sat in the rail with engine off. Allow a minute or so for that to clear through aswell.

Some audis have fuel and / or fuel rail coolers :-)

[Bobtrude 0]

Thanks man. Are there any short intakes that has the intake on the left side? (standing in front of the engine)

[FishWick 21]

I've seen a few custom ones like that, but not off the shelf.

From what I've seen so far, HGP do the best short runner in terms of port balancing and it the throttle is centrally mounted, so a little easier for IC plumbing.