This information may not be right, so I invite you to correct any mistakes. Here's where I got it from:
http://www.jblmk3.com/id134.htm
http://www.turboengineering.com/cust...ies/ht300.html

Compressor wheels (inducer / major / name):
2.98" / 3.99" / HKS T51 Kai SPL
2.93" / 4.02" / GT42
2.74" / 3.74" / GReddy T-88 34D
2.74" / 3.67" / HKS T51 Kai
2.60" / 3.54" / GReddy T-78
2.58" / 3.58" / T-66
2.55" / 3.47" / GT40 54 trim
2.42" / 3.44" / R85 (TEC HT300)

Turbine wheels (exducer / major / name):
2.96" / 3.23" / GT42
2.85" / 3.35" / GReddy T-88 34D
2.79" / 3,20" / HKS T51 Kai SPL
2.79" / 3.20" / HKS T51 Kai
2.79" / 3.14" / R85 (TEC HT300)
2.56" / 2.91" / GReddy T-78
2.55" / 3.03" / GT40 54 trim

-Max

 

Yeah...

That's why it hits 15psi at 3500 rpm. I see where you are coming from, but there are SO many factors to spool time that just comparing sizes doesent do you much good...

 

 

i had a t78 in my last car. it spools faster...atleast it feels like it does.

 

I overlaid the dyno charts of the 15 & 25 psi R85 pulls with my T66 @ 18 psi. It is noticeably less laggy than my turbo. Just ignore the labels.

Dark Red = R85 @ 25
Pink = R85 @ 15
Orange = T66 @ 18

 

that dyno looks good

 

Like I said the t66 is bigger...

 

So the r85 has a smaller compressor but yet make as much if not more hp then half of the turbos list there?
It also has a huge hot side why is that?

 

Yes, it would appear that it has made more power, however, you need to take into account the engine and all the offer stuff such as tuning. If all that remainded constant it would have slower spool than the turbos on the list, and also would make less HP because it can not push as much as the bigger comp wheeled turbos.

 

So maybe this kit isnt as good as everyone thinks? it has a slower spool time and moves less air (so less hp). So why are people getting this kit and how did kg parts get 456hp @ 15psi and 616 @25 psi? Are you saying that it might be a rare thing to see those numbers at that psi?

 

Also it did propel one of dee's car's in the 9's!

 

No I am saying that, Dee obviously knows how to tune a car, and port an engine!!!!!!

 

dee used this turbo because it is sized correctly for the rotary engine in his eyes.

 

pianoprodigy,

my t66 at 19psi made 300 ft/lbs of torque at 4000 rpm and held 300+ to 7500 rpm, spool and powerband depends on so many factors that it's hard to compare turbos unless on same car with near optimal tuning.

twok

 

Also, it is my understanding that the T66 (like many other turbos) may be setup different ways. I have no idea what the specifics are of my turbo. The previous owner simply told me it was a Turbonetics T66.

Here is a picture of my T66. I know it's not the best angle, but it certainly looks smaller than the R85.

 

the exhaust is smaller for sure but the r85 has a really large compressor housing.

 

The compressor housing looks smaller, because yours(most likely) does not have the anti-surge housings that the GT40R and the R85 have. However, this does not mean its smaller. But the turbine side is probably smaller unless it is a 1.15 ar

 

Just a correction on the GT40 numbers...88mm exducer is 3.46457" and the inducer is 63mm or 2.48". Just measured mine.

 

Looks more like a T61, looks too small to be a T66 but it's so hard to tell with that pic.

 

So do you think the only way he pulled those number (456whp) out of his car at 15psi was with a huge port job and some mad tuning and maybe with a few dyno tricks? Also I dont know how the anti-surge port works, I under stand it probable ment to stop compressor sure (hint the name) but how?

 

Guys,

Dee's ports are nice, but there is nothing special going on with them.

What dyno tricks are you talking about? Sheesh...

 

How much is spool time affected by tuning? I realize that my car may not make quite as much power as Dees car because of tuning; however, is it possible that the spool of the turbo could be significantly affected due to timing?

 

I like the kit one way or another dont get me wrong but im just wondeing what kind of hp I could expect form doing this setup: (oh ya dont mind the prices iim just playing with options before I take my car into the shop and i just did a cut and paste)


Kgparts.com
-R85 turbo kit…………………………………………….………………3150.00
Stainless downpipe
Stainless manifold
Tial 40mm wastegate
Braided oil lines
O2 bung
K&N filter
Rx7store.net
-Apex-i avc-r……………………………………………………………..450.00
-Act clutch (zx3-xt100)…………………………………………………...540.00
-Block off plates……………………………………………………………65.00
-Koyo Radiator……………………………………………………..……..359.00
-Greddy R-spec 3row intercooler…………………………………...…...1350.00
Gothamracing.com
-Apex-i power fc + commander…………………………….……………1200.00
-AST tank and cap………………………………………………………...149.00
-Stage 2 fuel system……………………………………………………….599.00
Horsepowerfreaks.com
-HKS turbo timer type 1…………………………………………………..123.20
-HKS BOV + flange……………………………………………………….260.00
-Greddy pully kit…………………………………………………………..110.82
-AEM wide band (not included in price)……………………………...…..447.75
Pineappleracing.com
-5 qt oil pan w/ cooling fins……………………………………………….450.00
Rx7.com
-Jacobs Pro pak w/wires…………………………………………………..389.00
-3 bar map sensor………………………………………………………..…99.00
-Clutch master cly………………………………………………….………84.95
-Clutch slave cly…………………………………………………………....59.80
-Clutch hose…………………………………………………………….......38.00
-Act street lite flywheel + counter weight………………………………....349.00
-SX fuel psi regulator + adaptor kit……………………………………….189.95
-Racing Beat dual tip 3in exhaust…………………………………………515.00
-Bonez 3in mid pipe………………………………………………………199.75
-Gaskets for exhaust………………………………………………………..20.00
-Gauge A-pillar mount 3, 52mm…………………………………………...84.95
edoperformance.com
Defi-D series 52mm black
-Boost………………………………………………………………..……112.50
-egt + fuel psi + temp……………………………………………………..573.75
-temp………………………………………………………….…………..135.00
-Defi controller unit II…………………………………………………….118.68
Labor
-Trans. Swap………………………………………………………………900.00
-all other parts…………………………………………………………....1000.00

Total…………………………………………………………………...13,674.60

 

My motor has a gonzo port or how ever you spell gonzo, and im running 2pc 2mm apex seals. I also want to go as far as 93oct will take me, without worring about detantion.

 

you need fuel lines and injectors.