New Esprit Dyno - 6/27/09

[gmendoza]

Since I was tired of the car not being able to hold more than 13.5psi at redline, I decided to have the turbos reflowed. For refrence here's the previous dyno with boost spiking to 17psi falling off to 13psi:

Now for the new graph. Notice how flat the tq curve is now and I only lost 200rpm of spool time. Blue is 12psi, red is 15psi, and green is 16psi.

This was on a conservative dyno known to read about 5% lower than most. Overall, I'm happy with the car. It's making more power with less peak boost but it's holding boost now. It also seems Johan's ECU runs very rich on hot air but with lower charge temps and adjusting the water injection, the a/f ratio fell right in place in the mid to high 11's. Even at 16psi the car stays cool; cooler than before at 12psi and no water injection!!!!

Here's the vid. The red car is Alan's (E5PR1T) running only 11psi of boost and water injection.

Edited June 30, 2009 by gmendoza

[mike_sekinger]

Great figures and well worth the work on the turbos.

Problems with the afr come from lack of charge temperature control. Now that you have that unde control, the ECU is not required to dump fuel, the engine is much happier and the power is UP.

Good job.

CHeers,

Mike S

[gmendoza]

Thanks Mike. One thing that I was not expecting was cooler COOLANT temps with a cooler charge!!! That's a very nice bonus.

[Tony94S4]

Great #'s Gonzalo,

r u sprayin b4 or after the blowers?

[gmendoza]

Thanks Tony. I'm spraying after the turbos before the IAT.

[Mister_C]

Wow good numbers! What have you done to your car to acheive that?

Edited December 12, 2009 by Mister_C

[WEllison]

Hi Gonzalo,

Great data very good information.

I am hoping simuliar results with the water air intercooler set up.

Wayne

[97-Esprit V8]

Gonzalo,

Did you ever check what your ignition timing is doing under full throttle through to redline with the OBD-II software? The new turbos would be more efficient and thus reduce the heat generated into the charge. Nice results, is your engine stock internally?

Paul

[gmendoza]

Gonzalo,

Did you ever check what your ignition timing is doing under full throttle through to redline with the OBD-II software? The new turbos would be more efficient and thus reduce the heat generated into the charge. Nice results, is your engine stock internally?

Paul

Hi Paul, the scanner I used wasn't that great and it was a while back so my numbers may be off. One thing I do remember is that a Lotus High Tq ECU was scaned had more timing (almost 10* I think) while my Johan ECU had less( ~ 8* I think)

The engine is internally stock.

[97-Esprit V8]

Hi Paul, the scanner I used wasn't that great and it was a while back so my numbers may be off. One thing I do remember is that a Lotus High Tq ECU was scaned had more timing (almost 10* I think) while my Johan ECU had less( ~ 8* I think)

The engine is internally stock.

Interesting, that is some serious ignition timing retard. Mucho power on the table, what was the IAT?

[gmendoza]

Interesting, that is some serious ignition timing retard. Mucho power on the table, what was the IAT?

I agree. Again it's been a while but I think temps were in the 118*F range. Ambient was about 80*F

[8KRedRacer]

Hello Gonzalo,

Very impressive rwhp!

I have been considering the reflow turbo's from PUK and Dynamic Racing along with intercooling for my 97. I would be interested in the details of where you had your turbo's reflowed and what was done to them. Also, have you noticed any negative effects in the drivability (i.e. lag)?

Thanks,

Alan

Edited February 8, 2010 by 8KRedRacer