Anyone have any clue as to what type of turbo this is? also it seems that theres a crack on the portion where it meats the manifold. ( in the last pic)

 

no one knows?!?!?!?

 

looks like a Turbonetics, judging my the casting mark... But I'm not too sure.

 

It's a stock S4 turbo with a bigger compressor side. The crack is common and nothing to worry about.

 

whats the use of a bigger compressor side, also why is the inlet bigger than stock? i compared it to a stock turbo outlet and it was much larger

 

More power.

 

Tje,
You notice how everyone with T2's swaps out the stock TID for a 3"er? Well, this 3"er tapers down to 2.5" to meet the stock compressor housing side. With this compressor, it (appears) to be a full 3". Which do you think would flow better, 3"=>3", or 3"=>2.5"?


There's the answer

 

Yeah, factory S4 Turbo-II Hitachi HT18S-2S w/ larger aftermarket compressor side, can't tell specs though just from pictures.

 

any other way to find out specs?

 

Take off the compressor housing, and measure the compressor wheel's inducer and exducer.

 

will do, all i have is a ruler though... it'll have to do.

 

well scratch that i didn't realize the wrench was tightening, and i swear i took a quarter of a turn and the head snapped right off a bolt, but its a stud that didn't have anything under it like it was holding anything here are pics.

 

well, i lifted up the wastegate flapper, and it hasn't been ported so i'm going to get that taken care of, is this essentially a BNR stage 1 or 2?

 

who cares, toss it on the car and see what it does.
(if you have the appropriate supporting mods that is)

 

i believe i do.. rtek 1.7, walbro fuel pump, 720's in secondary, and normal performance mods turboback, intake, making a 3" TID once the engine gets rebuilt.

 

It is a T04B with H3 compressor wheel. If you put it on the car the boost will creep till your engine pops so fair warning with the stock dinky little wastegate port. Good compressor wheel for up to 14-15 psi. about at 14 it stops making power with the stock "clipped" turbine wheel. It will run out of steam at around 12 or so with the stock turbine wheel unclipped which will be right at 300 RWHP. The inducer on that wheel is around 58mm. That compressor wheel and an 0 trim turbine wheel upgrade will do 350 at around 15 psi, and the response is great.

Bryan@BNR
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Are those all the details you can give? kinda vague, werent you ?

 

Bryan you are the man, so just port the WG and i'll be good to go..?

 

Naaa, not really the man, but thanks for flattering me.

You need atleast a 30mm port to keep the boost down reliably. If you don't perform major surgery to the wastegate, it will not work properly. I favor the S4 over the S5 after we get done with the wastegate, but not until then!

 

yea its going to get a extreme port done to it.