I just hope it would work as well as it looks...

 

I'm sure it will !!!

 

I will probably have the motor in a dyno in august..

 

Great , be sure to post some more pics when everything is assembled , I am especially curious to see how the oil supply tube for the center bearing is fitted and post the dyno sheets too .What turbo will u be using ?

 

I will use a GT4202R with ar.92 I think it was .92..

 

Did Richie reccomend that turbo ?, I think it will be too small for a full pp engine.I think the GT4508R will be a better choice , it has a larger turbine wheel.

 

Richard reccomended that, because I will use the car at the track and not drag..
And the housing is .92 just to get the car to be easier to handel at the track..

But I don`t have the turbo yet..

 

Well I suppose he knows what he's about , but in my opinion , those ports look freakin HUGE ! I'm just have a feeling that the smaller turbine wheel and the smaller housing a/r would be too restrictive for that size of port . I think I would have gone for the larger turbine wheel and a relatively small a/r like the 1.08 or a 1.15. The larger wheel will allow the necessary flow keeping back pressure down and the "small" a/r and the bb would make the turbo more responsive. there is a guy here seting up a race car with a street ported 13B and a GT42R , he made close to 400 RWHP at 20 psi boost , when he took it out for a spin he crashed it ! he said the turbo is coming on boost too fast ! and this is with a street port !

 

I now, it just why I go for the small a/r..
If i will go for a bigger a/r the power will come all at once, and the car would be a hand full to handle..
But I think I will try different turbo`s..
I got a great deal on turbo`s from the us..
But i have a hard time getting the short steering rack to the FD.

 

Well If you have the option of trying different turbos , by al means find out what works best ....me I have to try and get it right the first time .

 

Richie said it would be done in about a week , but he has to leave the country for 10 days , I should get it as soon as he returns !

 

? Sounds like you have that backwards. Smaller turbine a/rs make the power spike; making the car a hand full to handle..

 

Im with Marcel on that. U deff need a bigger exhaust housing. Im running a .96 on a street ported engine, and i do have some small backpressure already.

Il be getting a new turbo this winter and will go with a T04Z with a 1.15 housing just to be sure i don't have any back pressure.

Ul be driving a PP engine wich is not drivable under 4k rpm, u don't need a small exhaust housing. Get a bigger one, ul have insane spool up at 4k rpm.

U should go with somthing bigger. I would have gone with a 1.15 or a 1.36 or somthing with a PP engine.

JT

 

jantore, you cant compare a/r like that. you need to know what trim the turbine wheel is.

Anyway, GT42 sound a little small on a 13B-PP. I'm with Marcel on that.

 

Sorta on the original topic, but anyone know if they could do a 12A shaft?

 

I doni see why not , I can ask .

 

If it's not too much trouble. I'm hardly at the point of ordering one, but good to know what options exist.

 

The big a/r would be great for the Drag strip but not the track, this is why we are going for the smaller a/r...

This is to avoid the insain spoolup at 4k rpm..

 

But wouldnt the spool up be faster with a smaller a/r ? top end would suffer but down low the spool would be insane . This is why I'm saying a larger wheel with a small a/r should give you good spool down low and enough flow up top.

 

The smaller a/r i will get boost already at 2000 rpm but i will not get all at once..
Whit a bigger a/r i will get almost all boost at 4000rpm..

And when i have almost 800whp in seconds that will be usless at the track..

This is what Richi have told my, he has heard around a bit to find this out for my..

 

Spool up is more progressive with a smaller housing. With a large housing it comes on harder & all at once, no good for driving our of corners with a circuit car!

 

Yes this is what I was told..

 

very nice build up vest_racing

one thing thats funny, on page 3 of that thread linked in your sig is a picture of a semi-tube framed green 3rd gen, which funny enough is being built an hour from my house

 

Thanx CrackHeadMel...

The pic of the green 3rd gen is just to show how I'am going to do it at the front of the car...

 

I still think the turbine wheel of the GT42 is too small for a HUGE pp like you got there , your turbo response will be great but you will have a hard time making 800 hp wit it . You may see high hp numbers om some street ported motors using the GT42 , but remember they are not as sensitive to back pressure , get a turbo that flows better on the turbine side and you will way surpass the street port numbers. This is why I am looking into a GT47 !