MachSchnell

Luke, this is a genuine question of curiousity and not a challenge...wouldn't the .6 be a smaller turbo than the .5? a .6 would indicate a smaller radius than the .5, correct? And, assuming this is correct, what does the "trim" refer to specifically (being as you have the 50 trim E with .6 a/r)

Luke

i have a 54 trim E ( that was what it was sold to me as, at least )

I thikn this is what is twisting most peoples minds ( including mine) I have never seen another 54 trim....

The 54 and 57 are ancient... I can't compain about B's being "inneffient" w/o saying the the 54 trim map is "OLD" compared to the 60 and 50 trims.... FOr example... the 50 trim flows more air.

THe .6 refers to the A/r of the housing. jUst like the hotside ratings...

Everything i've seen follows this pattern... the larger the ratio... the larger the casting...

T3's are around .48's it looks like...

Here is the stamping on the outlet
<img src="http://members.rennlist.com/luke/Z1.jpg" alt=" - " />

This better shows the tightness of the water tubes.

<img src="http://members.rennlist.com/luke/Z2.jpg" alt=" - " />

DanD

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Luke:
<strong><a href="http://shop.store.yahoo.com/cheapturbo/gart3to457tr1.html" target="_blank">http://shop.store.yahoo.com/cheapturbo/gart3to457tr1.html</a>

</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">So what does it take to get one of these turbos to fit on the 951? Would it be cheaper to make a custom downpipe and crossover than pay 1500 for a Porsche specific turbo.

Rob

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Luke:
ok, i'd like to know why the B is smaller, but has a "larger" a/r according to your guy?</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">For a given cross sectional area, the radius increases as the A/r ratio decreases. Example, using a cross sectional area of 6 and A/r of .5 gives a radius of 12 while that same cross sectional area with a A/r ratio of .6 gives a radius of 10.

Rob

Luke

somethings not clickin' there guy

EVERYE i've found is a .6

Please find a B for me... or pics of a B housing w/ a stamp on it.

"TO4S: .70a/r

TO4b and TO4E: .60a/r "

here's proof that both B and E can be .6's

I"m prolly the Most curious here, because E is what I asked for and what I was told I was getting..... can anybody help other that speculation?

<a href="http://shop.store.yahoo.com/cheapturbo/newgargtt3.html" target="_blank">here ya go</a>

David Floyd

TO4E 60 trim .50 a/r. more confusion

<img src="http://boards.rennlist.com/upload/Turbo50ar.jpg" alt=" - " />

Luke

AHHHH...

here' I found this...

this is turbonetics 03' catalouge..

it states that the proper... "e" housing for a 54 trim has a 2.75" inlet...

"54 30376 133.00 2.170" 2.950" 30429 156.00 2.750" "

I"m gonna look for a part # tomrrow.

But if ;you check that list, you'll notice, both the 54 and 57 trims' the "rare" "OLD" ones have 2.75"'s .... all hte other E's are different.

i'm prtty sure mine is an E now.

nobody besides Sean and I have the 54 or 57 trims... those are the only E's that have 2.75" inlets... i beleive this is what is causing mass chaos and my lack of sleep.

These must be the only E's small enough to fit.

keith

PHEW!!

OK, so what have we learned here?!?

Luke

</font>

• <font size="2" face="Verdana,Tahoma,Helvetica">nothing is certain,</font></li>
• <font size="2" face="Verdana,Tahoma,Helvetica">Buy your stuff Direct and not from a middle man.</font></li>
• <font size="2" face="Verdana,Tahoma,Helvetica">A/r differ for each housing type ( E, B, 60, T , T3 )</font></li>
• <font size="2" face="Verdana,Tahoma,Helvetica">54 and 57 trim's have 2.75" inlets.</font></li>
• <font size="2" face="Verdana,Tahoma,Helvetica">not many people have seen them because they are out dated. ( i bet a surplus is hte only thing keeping them alive )</font></li>

<font size="2" face="Verdana,Tahoma,Helvetica">

Konstantin

I have seen a 57 trim AR.50 with 3 Inch inlet and it is a TO4E
the same for a 54 trim TO4E

Konstantin

Luke

according to the cataloge you can get 2.75"
or 3" for any E housing...

are those turbonetics? I dont think anything else would apply because supposedly their castings are "unique" according to PT.

JJ951

Any one have dyno results with an SFR stage 2 BB. I think that is the one I'm leaning towards. Thanks for all the great advice.

ItsStockOfficer

There a 3 E housings...the 2.25/2.75/3....I have a TO4E with a 60-1 compressor and a 2.75 with a .60 a/r, this is about all I can contribute. I have personally toyed with a TO4S with a .70 as well...

As for a B flowing as much as an E...Its not a matter of air flow, its a matter of tunning it to be effcient in your boost range. As Luke and others hinted at.

jimbo1111

There a 3 E housings...the 2.25/2.75/3....I have a TO4E with a 60-1 compressor and a 2.75 with a .60 a/r, this is about all I can contribute. I have personally toyed with a TO4S with a .70 as well...
Posted by rice intruder:

According to turbonetics spec sheet the 60-1 is a to4b with a 4" inlet. The 2.75 inlet would be the t04b 60-1 hifi.
Your just as stumped as the officer that pulled you over.

Luke

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by jimbo1111:
<strong>
Posted by rice intruder:
Your just as stumped as the officer that pulled you over.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">That is so totally rude, I"ve lost all respect for you now Jimbo...

He's a perspective 944 turbo buyer... He's also one of the most knowledgible guys I know.

and you had to go and do that porsche/cactus thing.

GROW UP dude.