T04R vs PT67-GTQ
#26
Mad Man
67s like low 20s, and up. same for the 74, and 76. Boost will not be linear, it cames on like a freight train. With RLTC, put your foot to the floor, and it goes, you can program wheel spin from 0 to 20%(difference from the front) cockpit adjustable with a **** once programed, fuel or ignition cut, your choice. Also, full throttle shift, keep your right foot planted, depress the clutch, the RLTC rev matches, and you shift(the whole process takes less time than you moving the shift lever)the cut can be all at once, linear, whatever you want. There are many faster Supras, a 67 is considered mid sized, like a 60-1 .96AR is here. Here is a .81 GTQ @33psi, that would be a gain of 500rwhp, and 425ftlbs in 1100rpm Topping out in the mid 700s. Later, Carl
Last edited by Carl Byck; 03-03-05 at 10:10 PM.
#28
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Originally Posted by SPL Dan
The PT makes boost much sooner .. Even though the TO4R was a divided housing . I was actually quite suprised ..
The TO4R would pull around 10lbs by 3200 and the PT is already into the teens by then .. I make my 20lbs by 4600 ... Boost isnt very linear then around 3500 RPM all hell brakes loose and its hard to tell anything ... I'll try a run and look at the playback on the DEFI's and see what boosts it is seeing and try to reply back ..
It will probally be tomorrow though as its raining here and driving my car would eb suicide right now ...
The TO4R would pull around 10lbs by 3200 and the PT is already into the teens by then .. I make my 20lbs by 4600 ... Boost isnt very linear then around 3500 RPM all hell brakes loose and its hard to tell anything ... I'll try a run and look at the playback on the DEFI's and see what boosts it is seeing and try to reply back ..
It will probally be tomorrow though as its raining here and driving my car would eb suicide right now ...
#29
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Originally Posted by Carl Byck
67s like low 20s, and up. same for the 74, and 76. Boost will not be linear, it cames on like a freight train. With RLTC, put your foot to the floor, and it goes, you can program wheel spin from 0 to 20%(difference from the front) cockpit adjustable with a **** once programed, fuel or ignition cut, your choice. Also, full throttle shift, keep your right foot planted, depress the clutch, the RLTC rev matches, and you shift(the whole process takes less time than you moving the shift lever)the cut can be all at once, linear, whatever you want. There are many faster Supras, a 67 is considered mid sized, like a 60-1 .96AR is here. Here is a .81 GTQ @33psi, that would be a gain of 500rwhp, and 425ftlbs in 1100rpm Topping out in the mid 700s. Later, Carl
#30
Mad Man
With RA1s, I get ~4000 miles out of the rears, 8000 out of th fronts. With Kumho MX(I think the best street tire value), I get ~6000 rear, and 15000 front. That's with not particularly aggressive driving. Aggressive, 5 minutes for a set of rears Carl
#32
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Originally Posted by carx7
I agree with carl. I have... essentially... a PT67 with a BB CHRA. I'm running a custom fully divided manifold and divided turbine housing. My setup made 15psi by 3500, 19psi by 3900 RPM and did 467RWHP @19psi on 100 octance. Kabooski made even more power with his ,8x housing.
Plently of power can be made with the smaller housings and a high flow wheel. I'd get the PT67 for sure!
-Chris
Plently of power can be made with the smaller housings and a high flow wheel. I'd get the PT67 for sure!
-Chris
I meant to say that I'm running a .84 divided turbine housing, GTQ turbine wheel with a 4" DP. I never felt that the .84 housing/GTQ was restrictive on the top end. Seriously, my car is primarily street driven and anybody who has driven a car with this much HP knows that it is a handful. Certainly one doesnt' need more power. Unless you are racing it kinda becomes just a game of numbers.
I still feel the PT67/GTQ is an aweseome turbo and I highly recomend it.
-Chris
carx7
#34
Well from what I can tell it seems like i'm getting 20lbs on the AVC-R at arounf 4200 ...
I'm getting massive wheelspin on the 245's though so it's probally not a horribly accurate reading .. One of these days i'll dith these stupid FD wheels and get some meat on the back ...
I'm getting massive wheelspin on the 245's though so it's probally not a horribly accurate reading .. One of these days i'll dith these stupid FD wheels and get some meat on the back ...
#35
Mad Man
Originally Posted by kenn_chan
Carl, the supra forum comes back with a message that the administrator has diasabled this function, IE: it won't allow you to register.
kenn
kenn
You'll see Lots of ITS, and Precision 72, 74, 76, and 80mm turbos for reaaly good deals. These guys change turbos like we change motors (Joke)
Last edited by Carl Byck; 03-04-05 at 05:26 PM.
#37
Mad Man
Sucks, here is what is listed on that one page
ITS GT76 .96 900.00 5000 MILES
hks T51KAI 1400 NEW
T72 .81 P TRIM 950 10K MILES
PT76GTS .81 NEW 1500.00
T88-34D 620.00
ITS T72 .70 900.00
PT78GT .96 1500.00 NEW
GARRETT 4082 .81 750.00
This is just from today, one page, if you want a big turbo, this is the place. All these guys are finding out making ~850-1000hp is not as fun as it sounds Carl
ITS GT76 .96 900.00 5000 MILES
hks T51KAI 1400 NEW
T72 .81 P TRIM 950 10K MILES
PT76GTS .81 NEW 1500.00
T88-34D 620.00
ITS T72 .70 900.00
PT78GT .96 1500.00 NEW
GARRETT 4082 .81 750.00
This is just from today, one page, if you want a big turbo, this is the place. All these guys are finding out making ~850-1000hp is not as fun as it sounds Carl
#39
B O R I C U A
iTrader: (14)
Originally Posted by AK86GXL
For some reason my buddies computer won't log out, so I'll reply under his name.
I meant to say that I'm running a .84 divided turbine housing, GTQ turbine wheel with a 4" DP. I never felt that the .84 housing/GTQ was restrictive on the top end. Seriously, my car is primarily street driven and anybody who has driven a car with this much HP knows that it is a handful. Certainly one doesnt' need more power. Unless you are racing it kinda becomes just a game of numbers.
I still feel the PT67/GTQ is an aweseome turbo and I highly recomend it.
-Chris
carx7
I meant to say that I'm running a .84 divided turbine housing, GTQ turbine wheel with a 4" DP. I never felt that the .84 housing/GTQ was restrictive on the top end. Seriously, my car is primarily street driven and anybody who has driven a car with this much HP knows that it is a handful. Certainly one doesnt' need more power. Unless you are racing it kinda becomes just a game of numbers.
I still feel the PT67/GTQ is an aweseome turbo and I highly recomend it.
-Chris
carx7
#40
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So Carl, based on your experience/knowledge, would you expect a PT67GTQ .67 AR to be a good choice for the street? sub 20 PSI?
Is there any technical info available on these turbos anywhere? I mean from Precision's website you can't tell what the options are: Ball bearing? Wet center? anything else?
Sorry, I still feel like I know little to nothing about the details of this turbo and just trying to figure out what I'm getting myself into if I decide to go that route.
Is there any technical info available on these turbos anywhere? I mean from Precision's website you can't tell what the options are: Ball bearing? Wet center? anything else?
Sorry, I still feel like I know little to nothing about the details of this turbo and just trying to figure out what I'm getting myself into if I decide to go that route.
#41
Originally Posted by Trav
Sorry, I still feel like I know little to nothing about the details of this turbo and just trying to figure out what I'm getting myself into if I decide to go that route.
#42
here are two more good sites for that one turbo http://www.horsepowerfreaks.com/view...bos_Only~.html http://www.precisionturbo.net/turbochargers.php
#43
BUILD, TUNE, RACE, REPEAT
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i believe the pt67 and the t4/to4r are very similar turbochargers. there really isnt much difference in the two. it all comes down to different wheel and housing choices.
#45
Mad Man
I am not sure which will be best, which is why I will be testing a 67P, .81P, and a .81 q trim T66. i expect the .81 P trim to be the best for roadv coarse, but a .84 divided Q, or a .81 undivided will give you more top end. the TO4R is an old scholl turbo, and does not generally use the garrett GT wheels(you can build almost anything). Still waiting for kabooski to tell me how many blades he has on his hotside, then I will have a much better idea. You can order the turbo dry, or wet, divided, or bnot from precision. just make sure they have all the parts in stock to build it Keep in mind this is a 20 psi and above turbo for the most part.
Trav, the turbo you mention is a smaller Ar, than what anyone i know of is running as a Q trim, maybe is the answer
Trav, the turbo you mention is a smaller Ar, than what anyone i know of is running as a Q trim, maybe is the answer
#47
Mad Man
Well, Kabooski does in fact have a PT67 .81 GTQ with an HKS cast manifold, search for his "I hit 520 rwhp today" thread. I will be dynoing a .81 T66 Q trim in two weeks, and a PT67 .81 P trim. The P trim 67 spools 400 rpm faster in a .68 AR Q trim on a Supra, but gives up ~10% HP on the top end. Keep in mind this is at ~30 psi. At 20-25 psi, I think the P trim will simply spool faster, and the power will not be an issue since I am only shooting for 450RWHP with as fast a spool as possible @~20 psi. I will start with the T66, but a Q trim T66, and a P trim 67 flow almost the same. It is very interesting to note that CARX7 had a dual BB .84 GTQ 67 with a very well designed divided manifold, and made ~470@19psi, vs Kabooski with a journal bearing PT67 GTQ .81, and an HKS Cast made 520@ 20psi. I think that the tuner was a part of the equation(maybe half the difference), but I think the .84 divided was maybe a little small. Somebody can chime in, but a .81 is closer to a 1.00 divided I believe. Also I think they both have very large street ports, with Chris's car having every bell, and whistle vs Roger having the bare minimum in terms of mods... Anyway, if you want tons of info on 67s, go to Moreboost.org click on the 67 in its various iterations, My friend ZSilvino runs the .68 PT67 GTQ, and like Chris has every possible mod. Silvinos car spools slowerthan his old T66 P trim with fewer mods. op end was better, but again only by ~10 or so. Look at Andi baratichis pulls on a cast manifold with the 67 GTQ, and you will see why I am using a P trim 67 on my Supra with the cast manifold. All these turbos spool so fast on a Supra it takes RLTC to keep the car straight at under 100mph @ WOT. Pretty much every tuner I've talked to(alot of them) thinks the 67 P trim will be way too small, so I will definitely try it in two weeks
#49
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Originally Posted by Carl Byck
Jeff, where are you located? Come help me finish my car for mazFest
I will be back in SF for a shoot on the 5,6,7, of next Mo. I'm training your SERT, SWAT (whatever) for SFPD on our NATO 5.56 I hope they know where the trigger is
I don't know how far away the range is from you.
PM me your number or I can you.
Later, Jeff