single turbo

[avinesh]

hey guys anyone know here how much power a master power t70 turbo will produce on a mark 4 supra at 1bar on stock fuel.......im goin single turbo an will use stock fueling for time being till i can afford injectors an ecu, will be running 1 bar till then..........have 500hp walbro pump an sard fuel pressure regulator using a 46mm external wastegate with 1 bar spring, has stock cams an internals with the usual front mount, intake an exhaust an car is auto cheers.......

[YeMs]

maybe 300kw before the injectors max out.

iv got a to4z on my 2jzgte and with standard 440's, even with a link g3 it only made 300kw before the injectors maxed out. thats with a bosch 045 pump and a malpassi reg.

[Py7h0n]

1Bar will kill your motor with stock injectors....

[escortman]

yeh ud need to check it on the dyno to see what boost can be run on such a large turbo

[avinesh]

yeh ud need to check it on the dyno to see what boost can be run on such a large turbo

yea i wouldnt even mind running 10psi as long as its safe

[Lith]

Why have you chosen to upgrade the turbo, did you blow the stock ones? With a 1bar spring you won't be able to run under 1bar of boost, though I would have thought a 2JZGTE would have come with sufficient fuelling to flow sufficient to keep up with 1bar of boost pressure?

Maybe bump up the fuel pressure and run it up on the dyno making sure there is no detonation or lean effect, if its fine then it should be fine. Should be quite fun

[avinesh]

Why have you chosen to upgrade the turbo, did you blow the stock ones? With a 1bar spring you won't be able to run under 1bar of boost, though I would have thought a 2JZGTE would have come with sufficient fuelling to flow sufficient to keep up with 1bar of boost pressure?

Maybe bump up the fuel pressure and run it up on the dyno making sure there is no detonation or lean effect, if its fine then it should be fine. Should be quite fun

yea thats what the tuner told me he said it should be ok at 1 bar an i will bump up the presure.......upgrading coz the stock twins need to be run in parallel to be reliable an they are laggy as an i mean laggy sooo i thought id run a single an have more top end after i get bigger injectors.....heard from a lot of supra owners that the stock twins are more trouble then their worth........

[flygt4]

the stock twins in standard sequential form will get close to 300kw anyway.
steelwheeled USDM spec twins are proven good for~300wkw and they have almost no lag in sequential form.

[avinesh]

the stock twins in standard sequential form will get close to 300kw anyway.
steelwheeled USDM spec twins are proven good for~300wkw and they have almost no lag in sequential form.

yea ok......last time i did that (sequntial form) i blew the turbo to pieces wont try that again buddy not really a rich person plus aim is to go higher then 300wkw later on......

[flygt4]

2jzgte from these forums has been running USDM twins for a long time now, may pay to ask him how he's found them for reliability. hes goes to nearly every track day that there is, so he can't be doing too badly.

agreed the ceramics arent the best at higher boost pressures, but i've seen them put down 260wkw at 14psi before on a very tidy low km's engine.

[avinesh]

2jzgte from these forums has been running USDM twins for a long time now, may pay to ask him how he's found them for reliability. hes goes to nearly every track day that there is, so he can't be doing too badly.

agreed the ceramics arent the best at higher boost pressures, but i've seen them put down 260wkw at 14psi before on a very tidy low km's engine.

yea thing is i want more then 300wkw but for now ill run low boost

[Lith]

an i mean laggy sooo i thought id run a single an have more top end after i get bigger injectors.....heard from a lot of supra owners that the stock twins are more trouble then their worth........

You got a T70 and are worried about lag?

[avinesh]

an i mean laggy sooo i thought id run a single an have more top end after i get bigger injectors.....heard from a lot of supra owners that the stock twins are more trouble then their worth........

You got a T70 and are worried about lag?

stocks twins in parallel hit max boost at 4000rpm.......plus the t70 has a .68 ar shouldnt be too much worse then the stock turbos hell might even be better

[Lith]

From the people I know who have used them on 3litres you shouldn't necessarily hold your breath on that. Fortunately the 3litre is torquey anyway. Either way, good luck and post results

[avinesh]

From the people I know who have used them on 3litres you shouldn't necessarily hold your breath on that. Fortunately the 3litre is torquey anyway. Either way, good luck and post results

thing is the people who you have seen use them do they have the exact same trim an ar coz the workshop thats doing this for me have one on their r33 gtr an it hits boost at around 4500rpm so realistically it should be the same or earlier on a 3liter...........what rpm do the people you know hit boost at???

[postfach]

Perhaps, but the RB26 head is almost certainly better designed than the 2JZ one, and that makes a big difference to turbo spool.

I would *not* recommend using a T70 and stock fuel system, IMO that's asking for trouble, and you say yourself that you're not rich, so I would imagine that trouble is something you don't want.

Be patient, save up, and do it properly, it will be more rewarding and less hassle at the end of the day, and you will probably achieve your goal sooner since you won't be wasting money fixing a blown engine.

[avinesh]

Perhaps, but the RB26 head is almost certainly better designed than the 2JZ one, and that makes a big difference to turbo spool.

I would *not* recommend using a T70 and stock fuel system, IMO that's asking for trouble, and you say yourself that you're not rich, so I would imagine that trouble is something you don't want.

Be patient, save up, and do it properly, it will be more rewarding and less hassle at the end of the day, and you will probably achieve your goal sooner since you won't be wasting money fixing a blown engine.

not even running low boost till i get injectors

[YeMs]

i have a turbonetics to4z with a .60 ar and a 1.1 exhaust, and its reasonably laggy, but certainly holds boost right up to rev limit. im sure with a smaller exhaust housing (say a .9#) it would be almost perfect. hits full boost up around 4500 as it is. mind u from then on, on 14psi, u pretty much have to put all your concentration on the road, and which direction the car has ended up pointing lol cos it gets pretty scary. thats on 14psi with 380rwkw.

however the 2jz has a shit load of torque off boost any way. all you can do is try it and see i guess, its simple enough to do, you should do it yourself and save some money, or atleast do all the easy bolt on stuff and just get them to do the exhaust. that way u could invest in a decent ecu to unleash the beast

may i ask how much they are charging you to fit it and what exactly they are doing?

i know of an auto mk4 in tauranga that has a t70 and sum hks piggy-back ecu. it makes around 260rwkw due to factory injectors and the standard ecu being pretty concervative (i believe that figure was obtained from the suprafest dynoday)

but as for your initial question, i still think you will be lucky to see anywere near 300kw with standard ecu and fueling.

[avinesh]

i have a turbonetics to4z with a .60 ar and a 1.1 exhaust, and its reasonably laggy, but certainly holds boost right up to rev limit. im sure with a smaller exhaust housing (say a .9#) it would be almost perfect. hits full boost up around 4500 as it is. mind u from then on, on 14psi, u pretty much have to put all your concentration on the road, and which direction the car has ended up pointing lol cos it gets pretty scary. thats on 14psi with 380rwkw.

however the 2jz has a sh*t load of torque off boost any way. all you can do is try it and see i guess, its simple enough to do, you should do it yourself and save some money, or atleast do all the easy bolt on stuff and just get them to do the exhaust. that way u could invest in a decent ecu to unleash the beast

may i ask how much they are charging you to fit it and what exactly they are doing?

i know of an auto mk4 in tauranga that has a t70 and sum hks piggy-back ecu. it makes around 260rwkw due to factory injectors and the standard ecu being pretty concervative (i believe that figure was obtained from the suprafest dynoday)

but as for your initial question, i still think you will be lucky to see anywere near 300kw with standard ecu and fueling.

how much boost is he running ???

[Lith]

thing is the people who you have seen use them do they have the exact same trim an ar coz the workshop thats doing this for me have one on their r33 gtr an it hits boost at around 4500rpm so realistically it should be the same or earlier on a 3liter...........what rpm do the people you know hit boost at???

Should spool better on a 2JZGTE yes - however hitting boost at 4500rpm is a really bad term, does that mean ANY boost or full boost? My car hits boost at 2000rpm but doesn't have full boost until just over 3500rpm.

I just had a chat with the guy, he has an RB30DET VL Commodore and he's actually running an XSPower Super T70 (.84a/r hot side) not a Masterpower T70 - the Masterpower unit is bound to be better performing. For interests sake, he reckons the XSPower Super T70 doesn't make full boost until over 5000rpm. My bad, it might not be as bad as I first thought - I just remembered it being a T70 he got off Trademe

Still a really big turbo, but so long as you don't get a lean out and blow it up on the stock fuel system and ECU - when you upgrade all that your car will be capable of some pretty serious power!