for a proper test mike you will need the proper setup.

get the donor car. pick a turbo. the 35r seems to be the most ideal. so. get a 35r .82 SS plot. then put on a T4 NOT T3 F THAT 1.06 back side mated to a T4 TRUE TS manifold. MPFab, full-race, shearer are the best IMO. and re dyno. IMO run 30 to 40 psi.


note. f manifold is 1.25 shearer and MPFab are 1.50. so make sure your runners on the SS manifold are the same.

 

i want to see them go from an idle roll.

 

problem with that is 2 cars, 2 weights, 2 setups, all different and play a role. if anything street logs might show something. take the test car out with camera and watch the difference and log it.

 

A 2.0 and 2.4? There is no way to make an apples to apples comparison between those to regardless of what else is done. Want to make a usable test? Same car, different turbo configuration.


Want to see what a dyno cannot reveal? Consider this comparison:



One car has a 35R with Buschur cast manifold and open .63 A/R T3.

The other has a TS 3582R with large primary (1.5") tubular manifold and TS 1.06 T4.

Same 93 octane, same boost.

The WOT chart looks comparable, with hp not more than 250 rpm difference at the widest point in the graph.

Now, I can sit here and tell you how vastly different these two cars drive. However, I should ask the owner of the other car to chime in and tell you what he things of the difference. Each of us has driven both. Let's just say that it one doesn't need more than 50% TP and 1st gear to know the difference immediately ... but that isn't reflected in the chart.

 

Garrett released native .82 and 1.06 divided T3 hotsides for 30r and 35r turbos a few months ago:

http://www.atpturbo.com/mm5/merchant...egory_Code=GTH


We're running a BW S362 on a DSM in a divided T3 .85ar hotside, seeing 38psi by 5k and making 700+whp. Another friend is running the same turbo/mani setup with a .76 div. T3 housing and seeing 24psi at 4100 rpms. Both cars on 2.0 bottom ends. For comparison, another local with an S362 running a 2.3 engine and open T3 hotside sees full boost just over 5k and made 691whp.

 

Ted,

I realised that after I posted it. I can post other 2.0L cars just as easy. I have a collection of them with all the pertinent data and combinations as close I can get them.

So you want me to do a low gear roll from 2k or something like that?

 

That and he is an exception since most people are not doing top speed highway pulls with 900whp

 

i know they made a t3. im not interested is t3. T4 is what i want and should be being made for 35r and up turbo's. even the 30r's like t4

 

I'd have to think about it because changes in throttle position would need to occur in real time. Off the top of my head, I do not think it is possible to plot this in 2D.

Anyway, see my post above regarding WOT pulls and their inability to reflect much of anything concerning transient response.

 

1.06 div. T4 for 35r:

http://www.atpturbo.com/mm5/merchant...egory_Code=GTH

FP also lists a 1.00ar div. T4 option for the HTA35:

http://store.forcedperformance.net/m..._Code=Turbo-FP

 

i know. but have you ever looked at the PTE housings???? they suck. there castings are horrible. i run one. i dont know what your trying to get at though.

 

I know we are not doing 2k WOT pulls, you are meaning something to illustrate transient response from varying TPS values. Let me know what seems to be a good driving TPS and RPM. I am thinking something that shows maybe someone passing on the highway with only a downshift and part throttle acceleration to WOT? It still seems that would be hard to quantify in 2D, I think I am beginning to grok your point.

 

Never ending discussion, I have yet to see a PTE turbo not destory themself's under my foot. But then again I seen alot of part's fail under my foot

 

Agreed

Mikey

 

more data please! good read so far.