I am mainly trying to figure out around how soon a GT42R would spool on s52 with a tubular manifold like the boost logic manifold.
I want high hp around 750-800whp, and I know that OZM3 got 726whp out of the 40R. I guess I am just starting to get that mentality of go big or go home, and I would just like to have more room to grow in the future.

alright so now is the time when you guys either talk me into going with the GT42R or talk sense into me and get me to get the GT40R

I don't think anyone has done it so there is no information to give you. It would be very difficult to fit a GT42R under the hood without cutting something up.

Killer Bee has a 42R

They are a really large frame turbo. You can get a precision turbo or a gt40 that will support your desired power level. A 42R sure looks badass under the hood though :devillook

I am mainly trying to figure out around how soon a GT42R would spool on s52 with a tubular manifold like the boost logic manifold.
I want high hp around 750-800whp, and I know that OZM3 got 726whp out of the 40R. I guess I am just starting to get that mentality of go big or go home, and I would just like to have more room to grow in the future.

alright so now is the time when you guys either talk me into going with the GT42R or talk sense into me and get me to get the GT40R

I got close to 600RWHP with GT40R, it has more to go if needed... However, I feel this kind of power is more than enough for the street. I know of a GT42R set up with much more HP than mine which is unfortunately is not streetable any more...

I would assume with a turbo like that your spool will be delayed a little bit with a very hard to control power delivery compared to mine...you will spin hard and go sideways at triple speeds with 750-800rwhp.:eyecrazy


It should do just fine for a quarter mile car though..:)

A 42R sure looks badass under the hood though :devillook


Showoff :stickoutt

:D:D:D:D:D:D:D

Do it. F'ing right doggy, go big or go home.

I think 726 is what AA estimates OZ3M made at the crank, hence his 600whp claim.

I got close to 600RWHP with GT40R, it has more to go if needed... However, I feel this kind of power is more than enough for the street. I know of a GT42R set up with much more HP than mine which is unfortunately is not streetable any more....:)
Holy cow! For a second I was like , "When the hell did he make that?" :stickoutt

So is this GT42R setup you know about on a BMW? Everything is streetable...just depends how hairy your nuts are. :)

Going triple speeds and going sidewayz is dangerous as fakk....and ya not going to have any fun with a car like that on the street ya going to be spinning tires aaaaalllllll the time

dont let ego get in the way of reality..

saying you have 700-800 rwhp and not being able to manage it or get it to the street properly isnt fun


Old saying


Power without control = Nothing

So is this GT42R setup you know about on a BMW? Everything is streetable...just depends how hairy your nuts are. :)

It is a BMW, not in US though...:)

BTW, about the hair: go sideways @ 100mph and they will all fall off:lol

so general concesus is... not good for street but good for track. not just because it would be too laggy but also because I would just be spinning all over the place.

what about lower boost for the street then high boost for the track. or is the 42R just too laggy.

Going triple speeds and going sidewayz is dangerous as fakk....and ya not going to have any fun with a car like that on the street ya going to be spinning tires aaaaalllllll the time

dont let ego get in the way of reality..

saying you have 700-800 rwhp and not being able to manage it or get it to the street properly isnt fun


Old saying


Power without control = Nothing
So then you get a 30/90 2.79 ramping LSD, 315 drag radials and Racelogic on 5% slip FTMFW :buttrock
It is a BMW, not in US though...:)

BTW, about the hair: go sideways @ 100mph and they will all fall off:lol
I went sideways near the top of 4th in my Supra on the freeway...I think it did all fall off. :rofl Sweet! Porn style. :buttrock

FWIW it has been my experience with my big turbo car that if done properly (tuning and system design) the larger turbos are easier to control than the little ones. The little ones tend to HIT hard, whereas my t04e60 trim on my 2.0 is smooth, linear (almost supercharger feeling). It will produce 5lbs of boost as low as 2500rpm, but smoothly builds to 21psi by 4500rpm. It is quick and progressive and completely controlled by your right foot. If a turbo seems to be dead, and then hit, I question how the tuning is set up or system design. I have had 5 different turbo setups and all going progressively bigger. This current one is the biggest/best I have had for street/strip. Sucks to Autocross on (as it was initially intended) so I don't do that with this car anymore. I also have the car's final drive INCREASED. Loads up turbo more, and softens power delivery. The car will feel laggy ONLY if you try and accelerate from a speed too low for a particular gear. As in 55 in fifth. My third gear tops out at 108, fourth 143, fifth 180. Hope this helps. Go GT42. Done.

FWIW it has been my experience with my big turbo car that if done properly (tuning and system design) the larger turbos are easier to control than the little ones. The little ones tend to HIT hard, whereas my t04e60 trim on my 2.0 is smooth, linear (almost supercharger feeling). It will produce 5lbs of boost as low as 2500rpm, but smoothly builds to 21psi by 4500rpm. It is quick and progressive and completely controlled by your right foot. If a turbo seems to be dead, and then hit, I question how the tuning is set up or system design. I have had 5 different turbo setups and all going progressively bigger. This current one is the biggest/best I have had for street/strip. Sucks to Autocross on (as it was initially intended) so I don't do that with this car anymore. I also have the car's final drive INCREASED. Loads up turbo more, and softens power delivery. The car will feel laggy ONLY if you try and accelerate from a speed too low for a particular gear. As in 55 in fifth. My third gear tops out at 108, fourth 143, fifth 180. Hope this helps. Go GT42. Done.

How much RWHP are you talking about???

See if you can stick a big enough turbo to get 750RWHP from your 2.0 and find out how smooth the power delivery is...:lol

I was thinking GT47-80 and almost bought it, but it was just too big to fit. :(

cameron your insane

Killer Bee has a 42R

Nope, PT-76 something something...custom

Nope, PT-76 something something...custom

do you guys have any input on the GT42R?

and how is the lag on the PT-76?

do you guys have any input on the GT42R?

and how is the lag on the PT-76?

With ANY turbo of that size on a smallish engine there will be a fair bit of lag..........

GT42R will come on boost at around 5,000 to 5,500 RPM...
Whereas PT 76 will be around 4500 RPM so I am reliably informed....

Now if it was a Dodge Viper lump.....well :eek: They can spool 2 big turbos up REALLY fast so lag would be a lot less.....but there is a lot less displacement here..

Main difference is GT42R is dual ball bearing technology. Meaning slightly faster spool time allegedly......but also I am told they wear far faster than a non BB turbo due to the ball bearing itself?? (as in the bearing wears)

I was intent on a GT40R until recently but have decided to go for a Precision Turbo. Most likely the PT 70 GTQ..

cameron your insane
Thank you. :wave Just so you know, I am not kidding at all!

Here are pictures of the turbo I almost bought.

76GTS on left, GT4780MID on right:

http://www.turbo6.net/forsale/car/GT47/GT47080MID%202.jpg

GT4780MID on left, 76GTS on right:

http://www.turbo6.net/forsale/car/GT47/GT47080MID%203.jpg

76GTS on left, GT4780MID on right:

http://www.turbo6.net/forsale/car/GT47/GT47080MID%204.jpg

I'm still thinking about it and wondering if I can fit it. Should I try it?

Boost junky... Your "street" car is gonna be undriveable, lol.

Yes

holy huge turbo cameron, there is always a way to fit it. do it, your car definitely wont be streetable... but will be bada$$

How much RWHP are you talking about???

See if you can stick a big enough turbo to get 750RWHP from your 2.0 and find out how smooth the power delivery is...:lol

I was thinking in relative terms... If you want to be serious about this for a second. I am running a BONE STOCK 2.0 ABA 16v VW engine with a Ptrim turbine t04e 60 trim compressor. Stock a 2.0 16v makes 134 rated crank hp and similar torque. I am making in the neighborhood of 475 crank horse at best guess (400-420whp based on previous dynos numbers, torque curves, with with smaller intake, turbo etc). Now, take a much larger engine, similarly size the turbo and come up with the same formula. And it is FWHP. A lot of factors go in to making the system optimized so that lag isn't an issue. If it has properly sized IC piping, not going TOO big on the IC so as not to create a long fill to pressure etc. High enough flow in the head. If it takes too long to fill and the boost has to spike up because of fill time you come up with an on/off type power delivery. If the turbine inlet pressures aren't too high that sort of thing. But whatever. I am sure you don't think I know what I am talking about.:ponder

edit: there was a summit coupe at the last import day down here (drove to the event) that was a DSM 2.0 with a GT42 that posted a 11.2 @143. How many ponies is that?

I was thinking in relative terms... If you want to be serious about this for a second. I am running a BONE STOCK 2.0 ABA 16v VW engine with a Ptrim turbine t04e 60 trim compressor. Stock a 2.0 16v makes 134 rated crank hp and similar torque. I am making in the neighborhood of 475 crank horse at best guess (400-420whp based on previous dynos numbers, torque curves, with with smaller intake, turbo etc). Now, take a much larger engine, similarly size the turbo and come up with the same formula. And it is FWHP. A lot of factors go in to making the system optimized so that lag isn't an issue. If it has properly sized IC piping, not going TOO big on the IC so as not to create a long fill to pressure etc. High enough flow in the head. If it takes too long to fill and the boost has to spike up because of fill time you come up with an on/off type power delivery. If the turbine inlet pressures aren't too high that sort of thing. But whatever. I am sure you don't think I know what I am talking about.:ponder

edit: there was a summit coupe at the last import day down here (drove to the event) that was a DSM 2.0 with a GT42 that posted a 11.2 @143. How many ponies is that?
What is germane is S50US, S52, S54 or S50B32 street cars with a GT42R. We know the theory.