To holset or not to holset?

[stace]

Ok, I have a 1g tsi awd. I'm rebiulding it for th most part, head job right now.

I just got laid off and with my spare time I just want to get the car on the road.(safteid and etested)

I have a 255wally, afpr, and a hks safr, and fmic... And a holset hy-35!

I know with that, I can run high fuel pressure and max out the stock injectors and the 14b..but my 14b has a crack in the outside of the exhust housing. wg hole is fine, its just around the o2 side of the wheel housing. It apparently ran fine before I got it..but a crack is a crack..

I ended up with a hy-35 for dirt cheap in great shape(yes Ive read the millions of holset posts)

Could I run the holset with the stock wg actuator at 11psi or whatever, with the 225,afpr, and the safr, and worry about injectors and management and high boost later , or should I just run the cracked 14b ?

And I have the hy-35 bolted to the block already with an adapter I fabbed up in my spare time..It clears the waterpipe, motor mount, block, and I replaced the rad sapport/crossmember to move my rad ahead like 4 inches.(lots of spare time)

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[stace]

But with the holset on and the waste gate open as stated before.....

I should be able to run stock injectors and be able to diognose any main start-up problems with the car first right? Mabye even etest it since they dont test the car on a dyno anyway.. which is i guess the main question..

then once the car is running and I can log and i'm getting no phanton knock or other stock issues, then I can put in some b igger injectors and (with higher FP) and run a mild boost with the safr. intill I get a better managment . and yes a 2g mas.

 

[dsm-onster]

Yes. Remember that the stock wastegate hole for the hy35 may be too small and you may creep. How much creep I don't know. You may build boost and no one knows how much.

I like the idea of getting the car on the road with the turbo you want. As long as you have the selfcontrol not to use the wastegate . It's much less work in the long run. And the car will still be drivable.

If you decide to upgrade the fuel injectors don't bother with upping the base fuel pressure. The suggestion to up the fuel pressure was to get you more fuel now before an injector purchase. I don't suggest upgrading to 550cc injectors. Your fuel controller can handle more, you can adjust base timing (1g car), and you can create 530cc worth of fuel flow with what you have now. You will definately need more than 550s to get into the potential of that hy35!

 

[stace]

Ya I learned self control with the saturn. After 4 engines I finnlly got it to boost and hold together.

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I sold everything after i gave up on trying to make 200hp, even superchargered it with a m62 blower.

 

[toofast82]

How much boost/timing were you able to run on the saturn? what kind of compression does it have? Youll be much better off with the 4g63, much more durable under boost! Clean setup though on the saturn

 

[stace]

timing was stock, cause i was using a fmu, and the hks-safr to fine tune.

20psi fuelpressure with 38lb injectors, and the fuel pressure rose to about 60psi with the fmu. wich was really rich about 8:1 on the wideband. washed out my crank bearings and spun them..so after replacing the engine I took fuel out with the safr, and got a 10:1 wich was livable considering it was a 9:1 compression ratio on the engine and stock internals.

I was pushing about 8 psi boost, when I was done. It was very fast for a 2400lb car with a small t3, 2.5 " exaust, all cuts removed. made people look. made a good sleeper, even when you heard the really loud BOV. Noone would take it seriously untill I spooled up and passed them! I sold the whole set-up and now it all sits in some guys garage.

 

[dsm-onster]

Ya I learned self control with the saturn. After 4 engines I finnlly got it to boost and hold together.

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I sold everything after i gave up on trying to make 200hp, even superchargered it with a m62 blower.

Not having an intercooler doesn't help

 

[stace]

ya there was an intercooler, if you look closely, the black coupler hose is beside the compressor, the compressor points doown

 

[toofast82]

Im just kind of curious about your exhaust with the hy35 facing the other way. Do you plan on fabbing the downpipe yourself? Are you going to cross it over to meet back at driver side and how might you do that with tcase and driveshaft in the way?
I just think that if people have run hx35 with t3 12cm housings the normal way, why cant it be done on hy35 with 9cm?
They do sell 1/2" spacer for manifold to head which should clear the block

 

[dsm-onster]

That is so much better. That 90* bend looks like part of a grey unpolished t4 size compressor cover . I was just horsing around anyway.

Yes, I didn't catch why you decided to mount the turbo that way, when you had it originally installed the other way.

 

[stace]

I couldnt mount the hy in the stock direction cause it wouldnt clear the block. all the hx guys use bulseye housings and such which actually move the center of the turbo out further to clear the block. Why bullsyey or bep or whoever didnt take in affect the water pipe is beyond me. Even if I used the 1/2 spacer it still wouldnt fit, holding the hy up to the block in stock position , placed the bolt holes almost an inch away from the maifold bolts..if you know what I mean.

The reason I went back to stock location is when I fabbed up the adapter to make it fit, I had not yet moved my rad ahead..without the rad moved ahead, the intecooler pipe off the turbo would not clear the rad and crossmember sapport, so I would have had to run the pipe under the main crossmember beside the exaust pipe...I didnt like that idea.

so I biult the adapter to fit it in the stock position(sorta). Then eventually cut and moved the rad sapport , so the rad is further ahead. NOW I could run the turbo in the OTHER direction and have room for the iC pipe, but then I woud have to relocate the alternator. The downpipe would have been 2 90's back under the turbo and a 90' to go under the car on the driverside of the center crossmember, and differantial.

With the stock location, I reduced it to just 1 90' and then the downpipe 90'

Yes I fab everything I can..everyone should learn to weld...someday I''l make my own tubular manifold and custom intake manifold..and the chassis will be so cut up and modified, Ill never be able to sell the car again muhahaha..anyway.

 

[dsm-onster]

Keep us updated! I'm interested in this turbo VERY much.