[Mk2] [Turbo] some progress pics, GT3071R MR2

[T.F.S.]

I cant help it guys lol, its the way I do things..

On mapping it was 26 degrees ambient, inlet temps never went above 30 degrees even after a solid hour of throttle abuse on ther motorway..

We disconnected the injection system to see what would happen and within something like 4 seconds it went over 60 degrees so is it any biggie I removed it?, I guess I will find out when I taken it for a run and monitor inlet temps.

I guess I can either inject more which will further cool the piston and cylinder walls and increase octane further or put the intercooler back on if things do not go to plan

its been mapped on 95 ron lol, with a 50/50 mix of H20/methanol injected via a 0.8mm jet over 6psi

Head gasket is still stock, pistons are stock, clutch is stock, power with the 3071 at 20psi was circa 350/350 and now it looks like we will be moving onto a 3582, I have no cares about blowing this engine but I will do my utmost to keep it in one piece whilst doing my utmost to blow it into a million pieces if that makes any sense?

[Kongaroo]

That's an interesting project bud

So without the intercooler and the car idling for several minutes at full operating temperature what is the max intake temp you see?

I'm just curious at whether there is much difference between what you see without intercooler and with.

I know when I have my car parked up for a while to make map adjustments in the laptop the car can see around 55 to 60 degrees as my intercooler gets heat soaked.

[T.F.S.]

I dont have the air temp sensor installed yet, that should be later today. (its at the welders as we speak)

[jimGTS]

you using one of those high speed sensors off ebay?
the RAIT sensor? i installed one in place of the stock sensor, reacts 10 times quicker than the stock rev3 sensor.

(this is asuming you can read the sensor on an ems tho?)

[T.F.S.]

I have an AEM sensor rigged up to my Link G4 so the data will is very accurate

[jimGTS]

cool beans

[djpkins]

hehehe...seen it running man, pukka

[T.F.S.]

That's an interesting project bud

So without the intercooler and the car idling for several minutes at full operating temperature what is the max intake temp you see?

I'm just curious at whether there is much difference between what you see without intercooler and with.

I know when I have my car parked up for a while to make map adjustments in the laptop the car can see around 55 to 60 degrees as my intercooler gets heat soaked.

Well I had it ticking over for approx 30-40mins today whilst doing bits to it, the ambient outside is about 15c, the highest I saw was about 22c on the laptop but I had the bonnet open!

[Kongaroo]

Hi mate, are those the temps from the airbox or the intake manifold?

I think I might have confused things as 'intake temp' was a bit vague in my last post.

I was after intake manifold temps (those monitored by the MAT sensor in intake manifold as opposed to the IAT sensor in airbox)

If those are intake manifold temps that is better than with intercooler?

I was just curious as to whether the peak (heatsoaked) intake manifold temps at idle minus intercooler was any different to with heatsoaked intercooler. I guess the difference between the 2 end numbers would be down to the efficiency of the fan kit pulling air through the intercooler at idle - would be interested to know the numbers

[T.F.S.]

The sensor is just before TB

[Kongaroo]

That's a really good result after 30 to 40mins idling. It's a lot better than I get on my car when I idle that long - I guess you'll be staying without intercooler then in this case

Do you have a MAT sensor in the intake manifold as well or is it a rev 2 car?

[T.F.S.]

Rev 2 car mate.

[Hedgehog Dodger]

Made up the inlet pipes, just need to get a few bits welded now, I totally removed the intercooler and now rely on methanol/water injection for cooling



Bankai.

I remember Andy Forrest running his 9sec Impreza without an IC. Top mount turbo with a 6 inch tube straight into the throttle housing....that was one insanely quick car.

[T.F.S.]

OK so I decided it was time to get the car back on the road for summer following last years turbo failure...

My friend supplied the 3071 back to me in reconditioned condition with new bearings but unfortunately it had so much play in it after only a couple of full boost runs it had to be put aside, I then bent over and bought a replacement Garrett core from the states

It arrived this week and I fitted it straight away, today I went out for a quick blast to see how the car is shaping up..

As expected it seems extra responsive but boost temperatures are not as low as we would like them to be, today is a wet cold day with around 12 degrees ambient, after a few full boost runs I managed to get the laptop showing 50 degrees which is not great IMO..

I wont stop with the intercooler deletion just yet though, I will first try adding another jet to the water injection system to see if I can keep temps around 40c, with double the amount of meth/H20 this may just be possible.., I wonder how much is the maximum I can inject?, I suspect its way way more than I am using at the moment

[Kongaroo]

Sorry to hear about the turbo rebuild not going to plan. How much was the core from the states if you don't mind me asking?

Agree that 50 degrees C is higher than you would want to see under boost especially if ambient was only 12 degrees.

I'll be interested to hear at what point when increasing your volume of alcohol spray your engine starts bogging down when spraying 50/50 water/meth.

I'm running about 1100cc/min of meth at the moment but I suspect you will start having issues with the engine bogging down at a much lower cc due to the 50% water content (or at least that is what happened when I tried it a few years back).

It's quite cool that you are doing this on 95 RON though as having a 'low octane map' is something I am considering lately now that fuel prices are skyrocketing. I probably wouldn't miss those lost HP as much as the cash in terms of daily driving

Look forward to seeing your dyno figures Brian

[T.F.S.]

Turbo was about £620 delivered from the states and then another "ahem" £38 for import duty...

[Kongaroo]

So £658 delivered all in? I paid £750 to get mine done at Universal Turbos so at least I now know I didn't get majorly ripped off. Still hurts thinking about how much I had to shell out to rebuild what was essentially a brand new turbo though

[T.F.S.]

Yea all in.

Added another 0.5mm injector on the WI yesterday, temps now seem to be back to normal

[vtecpower]

Yea all in.

Added another 0.5mm injector on the WI yesterday, temps now seem to be back to normal

Image Replaced With URL For Quote http://i42.photobucket.com/albums/e327/ ... 13-207.jpg

still on a paper h.g ??

if so dammm i need a water meth kit

[T.F.S.]

Yep, just to make it clear that's 20psi+ of boost on a GT3071R with no intercooler on a stock rev2 engine mapped with 95ron fuel running circa 340bhp.