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Originally Posted by mono4lamar
(Post 7574600)
You really broke 700 with a streetport!?! What were the exact specs on your 42r again?
I don't agree saying one turbo is just like another. The GT42R is much different then the T51R. Same size means nothing. The fact that its a T6 with 2" runners makes a huge difference in spool and power. Not to mention the dual ball bearing option. Hell my turbo spins for almost a full minute after I shut my car down, lol.... |
Originally Posted by GoodfellaFD3S
(Post 7574893)
Based on the size of the compressor wheel, the 500R should crack 600 at boost levels approaching 30 psi.
I'm not positive about this, but I think that the hot side on the 500r is too small to permit good enough flow at those power levels. I think you're right about the cold side, but that's just half of the equation. Suppose it can be done with the 500r, I bet the resulting EGTs would be so high that your motor wouldn't last long. |
Super Mod-
You're going to have to take that up with the guy you bought your turbo from, since he's the author of that PM! To be fair, I don't think he was comparing any ol t-51 with your t-6 frame gt42r. No doubt in my mind when he said that he was comparing t-4 frame with t-4 frame and a ball bearing t-51. These would be more alike than different. They would be more alike each other than say compared to a gt4094. Yeah, I forgot the "r" at the end. We all know to compare ball bearing to ball bearing and t4 to t4.
Originally Posted by III Gen X
(Post 7576741)
The following paragraph is a Private Message response to me about finding the right 600 whp turbo. The author is very experienced in this area at these power levels. I had a thread like yours last spring, and I concluded that the gt4094 was the best choice if the goal is 600whp.
-------------------------------------------------------------------------------- A T51 is essentially a 42R, minor minor differences. I would say a good setup might be a 4094 or even the smaller 42(94)R. The issue is spool. And the larger the turbo the longer the spool. You can offset this with other things but it will never be quite as responsive as say a 35R. The 500R would be hard pressed to get you 600hpyou would have to wring the crap out of it is my guess. Quote: Originally Posted by III Gen X As for the level of build, it has everything. It formerly had a t-88 on it running 30 psi and nitrous. When I bought it, I wanted something more streetable so I went with a T-61 and only ran 22psi. The car now has a new owner and he wants to hit the 600whp mark. Since the gt42r can support over 700whp, I'm guessing there is a smaller turbo that'll get the job done. I thought about the 500r, but I don't know anything about its hot side flow capabilities. Will the 500r flow enough on the exhaust side for this power level? Or should I be thinking about one of the gt40 combinations and which one. The car is street driven and owner wants both quick spool for street racing and plenty of top end to boot. He thinks the t-51r kai is where it's at, but I told him you might have other ideas. THanks! |
Originally Posted by manveru
(Post 7574437)
Messinian7: im in breck for the winter, and im missing my car. if you want an extra hand, lmk, i have a good friend living in ft. collins so its a good excuse to visit.
Anyway, from the all the information here, I am betting a 42R with a T6 hotside should be what I am aiming for (if I go over 600hp, oopsie lol no harm in that). I am planning on ordering the kit from Aspec when the time comes...Now I just need to research porting and AI options a little more and actually get myself a project car... |
Originally Posted by Messinian7
(Post 7566701)
Hey,
obviously the most responsive turbo that can reach that goal would be best, which is where I need some direction. :uhh: Thanks for the help. http://i84.photobucket.com/albums/k6...3081755467.jpg |
Originally Posted by ErnieT
(Post 7576764)
74mm compessor/1.05A/R T6 frame
I don't agree saying one turbo is just like another. The GT42R is much different then the T51R. Same size means nothing. The fact that its a T6 with 2" runners makes a huge difference in spool and power. Not to mention the dual ball bearing option. Hell my turbo spins for almost a full minute after I shut my car down, lol.... You and all the other bandwagonners can talk about your 2" runners and how long your shaft spins after you turn off the motor. You don't know uppie from downie? 74mm "compessor"? LOL! You misspelled it!!! It's spelled "TURBINE" |
Originally Posted by III Gen X
(Post 7577648)
You and all the other bandwagonners can talk about your 2" runners and how long your shaft spins after you turn off the motor. You don't know uppie from downie? 74mm "compessor"? LOL! You misspelled it!!! It's spelled "TURBINE"
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A 4294R has a much nicer wheel ratio than the 4094R I would bet that with a properly designed manifold and a 1.0 Tial housing you would get the same or better response than a 4094R with the .95 A/r all while making more power.
The 500R has the compressor to hit 600hp and it may with the larger A/r on the back 1.06 or 1.15 I would never sell it as a 600hp capable turbo. While it may be able to pull it off it is not what it should be sold as. It is designed to give performance equivalent to a TO4Z with crisper reponse and that it does. |
Originally Posted by Zero R
(Post 7579025)
A 4294R has a much nicer wheel ratio than the 4094R I would bet that with a properly designed manifold and a 1.0 Tial housing you would get the same or better response than a 4094R .
and i am torn on whether to go to a 4294 or a BW S475 in efforts to get a better ratio between the wheels for responce like you speak of..... Zero R would there be a notable difference in response between a 4202 and 4294 standard bearing?? thanks you |
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