you may also want to try borg warner turbo with bigger exhaust wheels with 1.1 divided housing.. 363, or 362 FMW should be about the same compressor size to what you have now.

 

That has got to be enough power. I'd be spending all my effort making sure its reliable and keep it alive!

 

You are right, but i need over 300km/h standing mile ;-) my last summer result is 290km/h

 

Anything you can do aerodynamically will also help break this barrier, under tray, taller or shorter wing, wing angle, rear diffuser to cut down the drag and lift at the rear. Tricky little monsters that add up.

 

I had the same problem, then installed a T78, two 1000 id inj and two 2000. Now this thing pulls

 

i did 302km/h 188mph standing mile

 

New results 1.15 divided housing

Torgue curve is extended.
Top end power is increase and power curve is better.
Max power only 10ps more, any idea why,too small compressor?

 

Edit: I'm sure I'm reading this graph wrong. Can you explain what lines are what? Is the red line the 1.15 housing, and the green line the .81 housing, or is it the other way around?

 

My quete message are old result, red is power and blue is torque.

Message "New results 1.15 divided housing"
blue is power and red is torgue.

 

You are running more boost to make essentially the same power, but it hangs on a little longer at the top end. And it takes a little longer to come on boost.

If it were me I would go back to the .81 un-divided housing and ramp up boost in the top end. This will give you the best of both worlds. I would try another 2 degrees of timing at 7000rpm and 3 or 4 degrees at 7500rpm. And as others have mentioned previously, a better ignition system will likely help in the top end, particularly with WI. Your wasted spark leading will be running out of coil saturation time at higher rpm. Or if you don't want to change the ign system try a smaller plug gap and see if that helps.

 

Have you measured whether your air filter is restrictive?
Intercooler pressure loss?
Exhaust backpressure?

rotorpsi1 had problems with exhaust back pressure causing his power to choke off. His muffers were causing 7psi back pressure at the end of his downpipe. He took off the mufflers and found heaps of power. Can you turn the boost down and remove the back section of the exhaust and try again? I comment because power / boost might go up in a big way if you do find and remove a restriction.

Some cheap tests to do is to remove the air filter and do a back to back pass.
Remove the most restrictive part of the exhaust

Are you using a catalytic converter?

Is your external wastegate open or does it go back into the exhaust?

What style of mufflers do you use?
What style of intercooler do you use?

 

With 0.81 un-divided housing i drive standing mile 290km/h and 1.15 divided housing results 302km/h, i think power is going up more than 10ps?

We try another 2 degrees dyno and it give 5ps more
Stabding mile run is hard to engine (detonation, heat etc), thats why i take 2 degrees off.
Ok maybe i change aem coils.
Thank you.

 

Filter restrictive 1.5psi
Old 3" exhaust back pressure (down pipe) is 8psi when i change 3"-> 4/3.5" difference is huge.
New exhaust is 4" downpipe and 3.5 exhaust i dont have back pressure results.
No results Intercooler pressure loss, but i can measure it.

Are you using a catalytic converter? No

Is your external wastegate open or does it go back into the exhaust? Open

What style of mufflers do you use? 4" Down pipe 3.5" open exhaust

What style of intercooler do you use?Autobahn 88 3" Autobahn88 Mazda RX7 FD3S Front Mount Intercooler FMIC Kit by:

I Have original intake manifold and throttle pody, It is ok?

Thank you very much.

-Postert