After a lot of time and effort I finally got my car to a point where I was very confident that it was put together correctly, issue free and ready for professional tuning. Tuning is being done at UMS Tuning and Tony absolutely knows his stuff. Any Rx7 in AZ should go to him for tuning. He is amazing!

After over an hour of straight drivability tuning a few boost runs were made. The car never took a break to cool down and coolant and oil temps were cool and rock solid. After a few full throttle boost runs the car lost fuel pressure while it was idling. Turns out one of the Twist Tite fuel line blew off one of the fuel pumps in the tank. Luckily this happened after a run and the car was idling. The motor is completely fine and should be back on the dyno to complete tuning late this week early next week at the latest. Results up till this point were 526WHP and 398WTQ at 20psi. It looks like there may be enough fuel for 25PSI. We will find out.

Short Mod list:
Rx7 Store GT4088 turbo kit with 1.06 AR turbine housing.
Jet Hot/HPC 2500 degree ceramic coating on manifold, turbine housing, and down pipe.
Custom V Mount IC and Radiator
Dual Bosh 044’s
6 x ID 1000cc injectors with base pressure set to 65psi with no vacuum to regulator.
Power FC w/Datalogit
Dual Sensor Connection EGT’s with analog out to datalogit

 

Since you have the dual EGT signal, what were the EGT's looking like then?

 

Also make sure your add clamps to those fuel hoses in the push-lok fittings on the tank, i had the same issue twice and like you got lucky that both time car wasnt under boost.

 

I haven't gotten the logs yet. I'm absolutely going to share when tuning is completely finished. I can tell you that I set the alarms on both egt units to go off at 1700 degrees and they never went off.

 

Wow. I was actually going to put clamps on as it seemed logical but the local fitting shop here in town said not to do it as it would compromise the seal? The tuner said he always put clamps on and has never had one blow off.

 

yeah, the only place that i had push lock fittings was inside the tank everywhere else i have- AN fittings, the problem is that the fuel vapors inside the tank make the hose soft and the hoses comes off under pressure.

 

Sucks. I was going to do stainless steel braided with an fittings but from everything I've read this shouldn't be used in the tank especially with E85.

 

That means he understands timing. I would lower the alarm to 1600, 1650 max. Sounds like you're in pretty good tuning hands though...

 

Could you take picture of the dual 044 intank pumps? Would like to see how you were able to mount both in the tank.

 

Sure. It is a CJ motorsports billet aluminum dual pump hanger made for 044's. It is a tight fit.

 

Nice numbers.

 

Nice #s. Where did you source those stainless fuel socks at?


Thanks

 

Oetiker clamps work well also.



http://www.batinc.net/mocal.htm

 

Fuel Labs makes the 100 micron stainless socks. When I ordered them they seemed to be a made to order item. 8 week wait. I got the fitting to connect them to the pumps from Jay Racing.

 

set to 65psi with no vacuum to regulator Why is this?

Those are nice numbers for that turbo.

 

I wanted enough fuel for over 500whp on E85 which was going to require a high base pressure based on my injectors to archive. There are many benefits to run higher fuel pressure if you are able to do safely. I'D injectors love high pressure and E85 seems to idle well at high pressure also.

I set the base pressure with the vacuum line off the regulator so that the dead times were accurately entered into the datalogit based on the I'D instructions.

 

(6 x ID 1000cc injectors with base pressure set to 65psi with no vacuum to regulator.)



oh, thought you were saying you ran 65psi always with ":no" vacum to regulator.

 

My bad. Confusing choice of words.

 

E85 runs a lot cooler due to its chemical properties, and should allow the engine to run significantly more timing which then lowers exhaust temperatures further.

 

What fuel line is used in your twin pump set up? Also where can I buy it from.

 

I got all of my stuff from a local shop in town that has pretty much every fittings and hose type you can think of.

Your easiest source would probably be Summit. Just do a search by fuel type for E85 if that is what you plan to run. I believe there brand is called push tite hose and fittings which is what you would use in the tank.

 

Disregard this post, was asking for info that was already posted above.

 

ported?

 

indeed the twin bosch's are a tight squeeze... me too man..
here is my set up

 

Yes street port with balanced rotors.