[oldsmokey]

If your swapping out your stock turbo (not an hy35) with a he351 your still going to have drive pressure problems. I wouldnt add any more fuel if your going to keep the he351.

 

[oldsmokey]

Its a little bigger than the stock he341 on the compressor side but it still has the small 9cm exhaust housing. Thats where you might run into problems. They are great little turbos, and a good upgrade for the money but they can only do so much. I have a buddy that did 529 with a stock turbo smarty, ez, and 90s but i bet his drive pressures were terrible.

 

[oldsmokey]

I hope to be able to keep my drive pressures under a little more control with the He351VGT?

Any idea how big the exhaust housing is with the vgt turbo and all the way open?

 

[oldsmokey]

You can open up the wastegate hole and put a bigger flapper on on the stocker wastegate that should help with drive pressure . Ill try and find you some info about it

 

[oldsmokey]

Here is what I found about opening the wastegate hole.

"The wastegate on these turbos has a 7/8" hole with a 1.25" puck covering it.
That is 22mm hole and 32mm puck.

I opened my wastegate hole up to 27mm. You might be able to go up to 28mm but with my crude dremel tool grinding ability, I opted to leave a little more coverage. 27mm is roughly 33% larger opening than stock 22mm. "