gt17...
Turbo Mini Forums

i think (might be wrong but...) the general consensus is that a decent/adequate cooling system shouldnt be overly effected by the addition of a turbo

however, water cooling is very desirable for turbo longetivity, helping reduce build up in the turbo's oilways etc

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

If you don't take the heat away with the water, then it's either going to go into the oil or heat up the engine bay.

If the heat goes into the oil, it will still end up in the water.

Personally I think it is best to plumb in the water cooling if you have it.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Cheers for clearing that up guys, I just suddenly realised I'd not given it any thought up until now.

I'll be running a front mounted rad, with a header tank Feeding into the bottom hose. I was going to plumb the head take off at number 4 back into the top of the header tank as a return, could I run this via the turbo? or should the turbo water be plumbed back into the top hose so that it's cooled before going back around the engine.

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

I think what matters is how (will it ?) water circulates once engine is stopped. Hot water goes up. If you don't have additional electric pump and plumbing is incorrect water will stall in the turbo and will just boil.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

What is difference in this numbers followed after gt1752,
for example I found few turbines but they have different number
* GT1752 452204 5955703
* GT1752 701196-0002
* GT1752 452204-0005
* GT1752 452204-0001

any ideas? :)

Nothing special!

might as well pop this on here too ,

latest power graph ,taken at the last rr shootout .

conditions were 21 psi boost at 5600 rpm ,then down to 17psi at max rpm .run took 9 seconds ,so boost did not build in the normal psi /rpm as is found on the rd or previous dno runs ..they took more like 20 to 30 seconds i think .

also ,this chassis dyno appeared to measure a higher low down torque than was realistic ,especially at the measured boost level s ,which were around 5 psi lower than normal below 4 k rpm .

so basically take it with a pinch of salt ..

the car now runs a repeatable 112 mph plus in the quarter ,so i think the max bhp is not far off .just maybe at the wrong rpm due to the boost control not having time to stabilise in the 9 second run .

there are two curves here , one on a reasonable 13.1: 1 air fuel ratio ,the smooth run ,at around 19 psi boost ,this run has the rpm wrong by about 150 to 200 rpm too low ,so needs moving to the right by that much ,you can then see it replicating part of the other run .

the other run is a poor mixture up to 4500 odd ,at up to 16:1 afr ,also it has the side pipe on to reduce back pressure , i think this shows up at the top end better on the graph .if i had the choke out fast enough ,this graph would have thre highest trq of all and mimic the other better mix graph below 4k rpm .



there is no sign of the turbo running out of performance at up to 23 psi on the track so far ,and each increase in boost has produced a nice increase in terminal speed ,and also an increase in traction problems ,still using an open differential..
eg
14 psi 106 mph
16 psi 109 mph
19 psi 112 mph

note these quoted boosts are after boost stabilised ,there is a spike on each to around 2 to 4 psi ,depending on the ferocity of the gear change .

regards
robert.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Good stuff as always Rob

Changing from the T3 to this turbo was the best thing I have ever done to my car.

In the 13's at last!.. Just

Hmm nice graphs, i guess these bhp are at the flyweel? :)

yes ,ut, i think the losses added were about 18 bhp .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

hi robert I am Spanish and I use a translator, I'm riding a 1752 GT turbo in my mini Could you make a diagram or photos of how to connect water pipes and oil? thanks

Oil goes in the top (m12x1.5mm bolt hole) and out the bottom (plain hole). Coolant goes in one side and out the other, both with M14 x 1.5 fittings/banjo bolts

Thanks but where do I have to give these drills?

like this:




M12 x 1.5 for the oil (top) and M14 x 1.5 for the water.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

thanks to everyone and how to do it in Spain do not like because they say miniturbos break easily but I love