rx7tt95

Couldn't get the torque reading to work for some reason so there's no data. EGT peaks about 8K rpm and stays there. Had a brief run-in with a new M3 on a deserted stretch of road. Managed to get up to about a buck 40 and saw 950 on the EGT gauge. Was at 1000 on the dyno. And yes, I left the M3 pretty hard



On the dyno, she pulls quickly to about 7500 rpm and slows down a bit from there to 8200. I chickened out and didn't run her all the way to 8500. Power doesn't seem to be falling off much and I think it would pull a bit harder up there with more consistent timing. I need to go in and tune at P19.

Fd3BOOST

Looks good Michel, glad to see some of your hard work and devotion pay off. Thanks for not making me go to 7club to read it.

nota944

Michel, I might have missed them, but what are the specs on your turbo? I've found a new GT4088 for 815. A reman GT40 for 589. Opinions on either?



Also, what are your spool characteristics? When does it come on during street driving? I'm currently running a Garrett 60-1 (.70/1.15) with an HKS cast manifold on a 13B-RE 1/2 BP. When I go to a new turbo, I'll be using a tubular manifold with 15" runners, so I expect to get somewhat better spool up from that.



Basically, my main concern is keeping a decent spool up, as I use the car for autocross, some drift, and the occasional drag strip run.



Thanks,



Reese

rx7tt95

I'm able to get 17psi by 4K rpm on the dyno, a bit sooner on the street. Good response down low and on the highway in 5th where I'm able to just punch it and go. I have the smaller version of the GT40, the 4082. My rear housing is a .94. I believe the smallest stock rear housing on the 4088 is 1.19.



I'd go with the new turbo hands down. I've heard that the GT stuff is dynamically balanced in two planes (for lack of being able to explain the more technical answer) and only the Japanese have perfected this technique. At least two machines are headed (or are here) in the US currently that will be able to balance the GT stuff.



The GT turbines are so much more agressive than anything else out there that spool up vs. size is really good. Transient response is also very good.

BoostedRex

Reese is trying to be sneaky and upgrade without telling his family!! BUSTED!!



Rx7tt95, I'm glad to hear that everything is working so well. Did you have a chance to get back on the dyno after you adjusted your timing yet?? I'm really interested to see what you put down after that. Good luck!!



Zach

rx7tt95

Haven't hit the dyno yet to fiddle more. I may try to spend more time and get my pump gas maps looking great and have Steve Kan tune the car on race gas at higher boost levels. Right now he's coming out to Florida on April 24 to tune a bunch of cars.

Michel