Of course we were concerned about the FP green turbo and they scoped the housing and blades and found them to be in perfect order.

The motor went off to WATT engine builder who upgraded the valves by 1 MM and switched them all to inconel.

I went back to a factory exhaust manifold, with heat shield and here are the results.

This was a pump gas tune 93.

 

And of course the NEW E85 numbers. Slightly less boost due to having a more stable DD tune.

 

So I take it you left the bottom end stock and upgraded the valves?

Also did you not have a failsafe like boost cut or something in case of overboost? I take it you are on AP.. i do not know if AP has this feature I know ECUFLASH does have a limit you can set.

Love the numbers your car makes.. hoping to make similar with my EF2.. but keeping torque low on E85.

 

You can't cut boost when you don't have an attached line running to the WGA; this is what was damaged by heat.

His block is stock, his head has +1mm valves.

Tom - Was any portwork done to the head?

 

Kracka I meant Overboost FUEL cut.. you dont need a wastgate line for that.. all you need is your MAP sensor to see over a certain amount of boost or your car to see a certain amount of load and it will do fuel cut.

 

And OP... do you have a boost plot by any chance? how is your boost curve set? flat or a dip towards redline?

 

 

Does the FP Green just lose flow up top? or is boost tapered on purpose?

 

The green just runs out of breath.

 

yeah i can't get them to hang on up top either
awesome curve though. got to be happy with that!

 

If I can recall Kracka's EF2 doesnt drop towards the end.. does this mean EF2 can hold more boost at redline? or would the fact that your setup has Cams make a difference too?

 

bigger cams, higher airflow through the motor, might mean the turbo appears to fall off more, but in actual fact it's flowing just as much.

 

The oversized valves helps flow too. This graph also is revved out a bit further than Kracka's. Kracka's looks like it might be starting to fall off too at the same time. (Kracka's latest graph anyway).

More on topic to this post as a whole, I'm really happy to hear how this car is holding together. It makes me feel a lot more confident about switching to E-85 sometime soon on a stock block. That's a good amount more torque than is commonly called "safe", especially when you add in the SST eatting some more before it reaches the wheels and dyno.

 

It's difficult to compare a MR to GSR as well. Plus Kracka and I have different parts. Our power curves are right on top of one another.

 

Hows that? The SST has different ratios but it does not run through a torque converter with built in slip.