Re: gtx 3071 tial housing new 3inch exhaust completed

[T3rra]

Just an update car was finished last week or so,

Iv not drove it much as I wanted tom to check and re tune, however the old 26/8 tune is pretty close, a/for 11.6/11 spool up is pretty much same as my 26/8 !!! There's 1 bar by 3k in 5th

So I'm wondering if this turbo needs boost to provide the power upgrade, what sort off boost levels can I run on 97/99oct super unleaded

Had a little encounter with a gt2 rs, on Saturday

Was behind him at some lights could see he face eyeing me up in the wing mirror, light changed and we set off a resenable pace, then he floored it as I changed in to 2nd gear at 15mph, had I had laggy dunno queen turbo there be no chance

However I chased him pretty well to the next set off lights where he took off again, this time I was ready, there wasn't anything in it. Dispute getting towards 3 digits

 

[944Turbo]

Good stuff, nice to see the Augtronic can compensate for the different characteristics of the new turbo. I am happy running 18PSI, I believe Ricks car and Marks run 21psi with suitable mapping and mods (bigger injectors, uprated fuel pump, coil on plug etc.) - 21 makes me nervous, I think the tune has to be spot on, and a bad batch of fuel could create some issues - though the augtronic set up can probably adapt to this better than a chipped standard ecu. At high temps and pressures I always imagine the tops of the cylinders moving around like a saturn rocket engine nozzle - mainly because I have seen the polish marks on the cylinder 4 headgasket. Having said that when my boost controller failed I hit 36psi on a couple of occasions - it trails off and leans out quickly at about 3500 but no bits came out the block. Tony

 

[944 man]

36psi??? That's all very 'Group B', isn't it? []

 

[944 man]

The 951 is a Group B homologated car, of course...

 

[944Turbo]

ORIGINAL: 944 man The 951 is a Group B homologated car, of course...

[] The first time it happened I had wheelspin in 4th gear in the wet, I forget how fast 3,200 rpm is in 4th but it woke me up! The second time 6 or so years later was at Bedford and I though I had broken it, but then realised it feels mighty initially and trails off quickly. On my boost controller, there is a feed to monitor the boost level sealed with an o-ring, if it leaks then it holds the wastegate shut as it never 'sees' the preset pressure, I have considered teeing in a pressure relief valve inline with a whistle to get a nice audible warning.

 

[T3rra]

I'm thinking 1.5 bar, is it the main fold pressure the issue or the bhp. Not sure if toms set up has compensated or the turbos are close to each other..... Egt should be greatly reduced over most kkk hybrids

 

[944Turbo]

I think it is possibly pressure/heat related that causes the cylinders to flex and move, possibly detonation that does the real damage - the higher boost levels create more heat - a more efficient intercooler would probably help as will the exhaust. Need to test some to destruction to be certain Mine did over 75,000 hard driven miles at 18PSI, I have seen cracked bores and destroyed engines at higher boost, if the tune is OK (with reliable boost control and decent AFR and knock monitoring) higher pressures can be safe- I know Patrick (in Australia) was running much higher on E85 but cant recall what other engine mods were on that engine Tony

 

[nick_968]

ORIGINAL: T3rra Just an update car was finished last week or so, Iv not drove it much as I wanted tom to check and re tune, however the old 26/8 tune is pretty close, a/for 11.6/11 spool up is pretty much same as my 26/8 !!! There's 1 bar by 3k in 5th So I'm wondering if this turbo needs boost to provide the power upgrade, what sort off boost levels can I run on 97/99oct super unleaded Had a little encounter with a gt2 rs, on Saturday Was behind him at some lights could see he face eyeing me up in the wing mirror, light changed and we set off a resenable pace, then he floored it as I changed in to 2nd gear at 15mph, had I had laggy dunno queen turbo there be no chance However I chased him pretty well to the next set off lights where he took off again, this time I was ready, there wasn't anything in it. Dispute getting towards 3 digits

Good work Do you have any pics of the install? What did it cost for the conversion to fit the GTX in the end and did they stick with the factory mount or make a new one?

 

[T3rra]

There's pics on tipec made a new mount and everything else around it, expect heat shield, currently running cooler then my 26/8 did I can pull over and hold manifold wasn't any change from 3k and that's not including turbo

 

[T3rra]

Any ideas or guess to what she putting out? R say half a banana and a pea nut Back end is breaking free in 3rd at 60 mph as boost comes on, despite 285 polite sports at 1.4 bar

 

[T3rra]

As the turbo is capable off producing much higher pressure then I would ever run on the set up iv got, I was hoping it would be flowing good cool density, rather then high pressure at the cost off increased egt. Iv got 3" from the turbo back so exhaust should help, but iv running the 0.63 housing. Looking at the compressor map it's based on 0.60 hot side so I'm thinking that should be okay, think the need to run larger sized kkk housing come from a resistive design. Plus the 0.63 is larger then kkk6/8? There's a lot off smaller engine cars making 450 + on 1.5 bar There's a golf making 550 on stock engine ...... running high boost Power delivery feels different less harsh and more driveable which I think makes seat of pants dyno hard to trust, front end feels lighter at speed so she probably squating hard But I do feel like at simmler boost levels it's making simmler power 26/8 Needs to get on a dyno really

 

[Diver944]

If you are hitting 1 bar by 3000rpm and holding it all the way to the red line with the fuelling spot on then I would guess you will be around the 300-320bhp mark and possibly 350ftlb. I am not up on the gtx turbochargers technology, but it looks like you have the intake sorted with Toms ecu and MAP and the exhaust sorted with 3" all the way through so it should be breathing nicely and not getting too hot at only 1 bar []

 

[944 man]

ORIGINAL: 944Turbo On my boost controller, there is a feed to monitor the boost level sealed with an o-ring, if it leaks then it holds the wastegate shut as it never 'sees' the preset pressure, I have considered teeing in a pressure relief valve inline with a whistle to get a nice audible warning.

Duck call, definitely!

 

[944Turbo]

ORIGINAL: T3rra As the turbo is capable off producing much higher pressure then I would ever run on the set up iv got, I was hoping it would be flowing good cool density, rather then high pressure at the cost off increased egt. Iv got 3" from the turbo back so exhaust should help, but iv running the 0.63 housing. Looking at the compressor map it's based on 0.60 hot side so I'm thinking that should be okay, think the need to run larger sized kkk housing come from a resistive design. Plus the 0.63 is larger then kkk6/8? There's a lot off smaller engine cars making 450 + on 1.5 bar There's a golf making 550 on stock engine ...... running high boost Power delivery feels different less harsh and more driveable which I think makes seat of pants dyno hard to trust, front end feels lighter at speed so she probably squating hard But I do feel like at simmler boost levels it's making simmler power 26/8 Needs to get on a dyno really

Another thing to check is if the intake is leaking anywhere, mine was from the idle stabiliser and also the throttle body. Your new turbo will be holding boost to the red line, whearas your old one wont and it will also be more tolerant of the leaks. I reckon at 18PSI if the rest of the engine is healthy you could be making 320 - 330BHP on a dyno dynamics RR and 330-350ftlbs at 21psi if it stays in tune 370-400bhp. My car is running (loosely) a K27/8 but I fitted it around 12 years ago and the options were fewer. Doesn't the golf have a cast iron block? and bear in mind not all dynos horses are equal Tony

 

[944Turbo]

ORIGINAL: 944 man

ORIGINAL: 944Turbo On my boost controller, there is a feed to monitor the boost level sealed with an o-ring, if it leaks then it holds the wastegate shut as it never 'sees' the preset pressure, I have considered teeing in a pressure relief valve inline with a whistle to get a nice audible warning.

Duck call, definitely!

I remember a vid of a scooby with a duck call dump valve - brilliant!

 

[T3rra]

Not looked in to the golf, just what google come up with. What sort off mainfold pressure at idle would be leak free? Pretty sure im leak free as theres possative boost from 1k in 5th Extra 1psi = 10hp?