It's 1.5JZ with a T78. It put down 700hp at only 6000rpm, 25psi, 13 degrees timing so far. We ran out of fuel. It will be dynoing again next week and we expect close to 1000hp. I will keep you posted.
Well you must have either a very generous dyno or a very efficient engine to make those #s at that boost but I assure you that the turbo is just about done at that point. Dont expect much more than 750rwhp with that turbo.
I just caught something... he said "700hp @25 psi". With a manual tranny, that would be around 600 rwhp out of a T78 so that sounds about right to me. Now, 700 RWHP? Not no, but HELL NO! I think we misunderstood him.
At 6300 the hp curve is still rising. 6000 is the peak??? Only for torque. Remember we let off the pedal at 6300 because the fuel pressure was dropping. With the 272's the hp should/will peak around 7300-7500rpm.
I will be back on here this weekend with a dyno graph over 800hp on a T78. Yall see! lol
I think you fail to understand how a turbocharger works. It does not matter what the displacement of the engine is, what RPM you rev it too, what cams you have etc... A T78 can only flow enough air for so much horsepower. You will not make 800rwhp on a T78 period. Im not sure why you dont understand this. Due to the flow cababilities of your particular set up you may be able to max out the T78 on a lower amount of boost but you will make no more power than anybody else with that turbo. PERIOD!! By the way, if you come back with a 800 rwhp dyno sheet for that turbo you are either spaying or the Dyno is not calibrated properly.
Updates on the t78 dyno yet. I'm really anxious to see how it turns out. You'll either put an end to the haters or prove that they were right. Either way I'd like to see the results.
He already posted in another thread that it tapped out at 700 like we all said. By the way it had nothing to do with hating so your comment irritates me a little. It is based on fact and anybody that understands how turbochargers really work will understand this. You can only get x amount of airflow out of a given turbo regardless of the engine you put it one. If pointing out the FACTS makes us haters then I guess ill keep hating or mabey I should go see if my 76 will make 1200 hp.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Supra Forums
7.6M posts
107.5K members
Since 2001
Supra Forums is the largest online Toyota Supra MKI, MKII, MKIII, MKIV and MKV owner's club community. Discuss DIY, modifications, and upgrades.