|Topic Review (Newest First)|
|June 27th, 2019 20:33|
|bkperformance19||Water/Meth injection is a must have with 91 octane.|
|June 26th, 2019 00:00|
Originally Posted by martinbrown349 View Post
|June 25th, 2019 01:33|
|martinbrown349||I think you are asking for trouble at 20PSI and 91 gas. All those cars making 400 most likely making it on E85 or at least 93.|
|June 20th, 2019 21:30|
|benckj||Looking good and a long time coming. Not sure why wastegates are advertised as water cooled as really can't see the point unless your very close to exhaust outlet. Hope you get some decent numbers on the dyno and more importantly drives the way you want.|
|June 20th, 2019 19:57|
|DavidHarle||OK, that's it, it's in. And it runs... and it does not make any weird noises... So far, so good. At first I had to find the new cranking values for the new cams, lower compression and bigger injectors combo, but it's fine now, it just took some time. At first, I placed the BC264 cams at 0 deg in. and 0 deg ex. and was getting 17inHg of vacuum instead of the 20 I was getting before and did the break-in plus a few non-boost fuel map changes. The motor performance was very poor. After dialing the cams to 3 Deg advance on intake and 7 deg retard on exhaust, I was only now getting 12inHg of vacuum, but it pulls good. Can't wait to go on the dyno for the final tuning and I will post the GTX2867R spool time video.|
|May 1st, 2019 07:57|
|DavidHarle||OK, it was a while ago, but the engine is finally ready with the GTX2867R. I have used CP pistons with rings, Eagle rods, ACL race crank/rods bearings, stand alone ECU, 800cc injectors, the head was ported and I changed the cams for Brian Crower 264. What puzzles me is the Tial wastegate... I read in the doc. that it is water cooled. Where should I tap in the cooling system?|
|December 15th, 2017 19:36|
|Milo_101||Let us know your results!|
|December 14th, 2017 17:59|
After doing my homeworks, I have chosen the GTX2867R. I will try to attach the calculator I've made.
And I like this guy's spool video. It's on a 1.8L so it should only be better for my 2.0L
|November 21st, 2017 18:31|
|DavidHarle||I have just found out about the GTX2867R, same flow as the GT3071R, but better spool. Any one out there have experience on a 3SGTE ? Is it worth the extra money ?|
|November 21st, 2017 17:52|
So if I will be limited by the 91 octane, I will not really use the 3071 at its full potential then. Is it a waste of money in my case ?
Also, I looked at that Mamba turbo CT26 and to fit a 3071 wheel in a CT26, I wonder how much wall thickness there is left on that housing...
|November 21st, 2017 07:47|
Sorry, probably not helpful, since you are already pretty far down the built turbo path.
|November 20th, 2017 20:38|
I agree with the others, low octane fuel will be the limiting factor.
If installed and maintained properly WI is as safe as its gets. I'd be more relient on having it as a safeguard rather than trusting a local pump station to deliver high octane fuel. Think through your system and how you want to provide a fail safe system. As an example a simple pressure switch can be installed on supply line to warn (LED)or protect engine (timing retard) if there is a failure. Combine this with an accumulator tank and it will deliver enough water/meth to supply 1 or 2 high boost sessions. This covers any failure apart from blocked line or nozzle.
On the turbo selection, spend some time and look around. Technology has moved very quickly in this area and new high flow 9 blade turbines along with billet extended tip compressors deliver great performance over a wider range. If your willing to do some of the work yourself matching exhaust and service lines there are several real choices available. One example;
TOYOTA 3SGTE Celica ST185 205 GT4 Twin Entry CT26-GT3071R Turbo - MAMBATEK TURBO
|November 20th, 2017 19:12|
That power curve looks great between 4300 and 6000 rpm. Was the TVIS still there ? Any chances or tips to have the power 500 rpm sooner ?
I am affraid to go with water/meth injection. I read so many scary stories on forums. I know I could use a secondary map in case the water/meth tank is empty or if I loose pressure in the injection line. If the whole setup would only give 30hp out of a total of 350, I don't think it's worth the risk. But any comments on this would be appreciated.
Thanks again for the great replies
|November 20th, 2017 09:02|
The GT3071 should be able to make 350whp on pump gas on that motor given the cams and head work. Maybe add a re-plenumed intake manifold, then you should have no trouble. Should be able to do it at about 17psi.
Here is my dyno from when I had a similar setup. Biggest differences are I had a 2.1L stroker, and oversized valves.
If the images don't show up for you, get the photobucket fix for either chrome or firefox.
These were at ~20psi on pump gas with water injection, but also at almost 5000ft. So roughly 3psi was compensating for the altitude. Others with similar setups have made similar power at sea level and ~17psi.
|November 20th, 2017 08:48|
|November 19th, 2017 21:01|
|DavidHarle||What is the highest boost (PSI) I can go with 91 octane before before it starts to knock ? And around how much power should I expext ? I only want to use pump gas, so what could be realistic ? Should I stick with the 3071 then ? Or go smaller ?|
|November 18th, 2017 23:33|
|2ZZXRS||I think you are asking for trouble at 20PSI and 91 gas. All those cars making 400 most likely making it on E85 or at least 93.|
|November 18th, 2017 21:30|
here's the story... I am building my 2nd gen 1991 JDM 3SGTE daily driver. I have done the following so far:
-CP pistons (.040 oversize and 9.0 compression ratio)
-ACL race bearings
-The intake side of the head was already ported by the previous owner
-Brian Crower Stage 2 cams 264/264 low lift (8.74mm)
-Adjustable cam pulleys
-I have decided to have a valve job done, but keeping the stock valves and springs
-I am not a reving fan, I usually stay between 3000 and 6000RPM
-Cometic multi-layer head gasket
-Walbro 255lph fuel pump (already installed)
-DIYPNP ECU (already installed)
-Greddy side mound larger intercooler
-I want to keep the TVIS since it helps low end torque
-Injectors and fuel rail not decided yet...
OK, here's my next step:
I am looking at making 350whp (400 crank hp) with 91 octane pump gas at around 20 PSI. Am I in deam land ? I was looking at the GT3071R, but all the threads about this subject are old, dyno charts images are no longer available and I'd like to know if there are better options now in 2017 to keep the spool time as low as possible. I would like to spool to full boost (20 PSI) at around 3500 RPM. Am I still dreaming ?
I was reading that soo many other turbos can do 400hp, but I'm not sure about 2871 or maybe others you may suggest ? If I have to choose between low turbo lag and top power, I will choose low lag at the expense of top numbers. So any suggestions are welcome.
I know that there is a world of difference between paper specs and real world. That is why I am looking for people with experience in real component applications. If you say that the GT3071 is not the right choice for me, please suggest what you think would better suit my needs.