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Which turbo(s) to get?

  • T78

    Votes: 9 39.1%

  • T66 .81

    Votes: 9 39.1%

  • HKS 2835

    Votes: 5 21.7%
  • Total voters
    23

T78 vs. T66 .81 vs HKS 2835's

2098 Views 15 Replies 6 Participants Last post by  ekool, 
G
Out of the three: Consider all with cams, fully tuned, etc.

1. Best for street driving/racing

2. Best for 1/4 mile racing

3. Best overall turbo(s)

Which would you guys get if you could have any of the three?

Thanks!:D
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B
The T-66 is my choice.
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G
There is no "best" turbo. It's real simple: smaller turbo = quicker spool = less power = "better streetability" and vice-versa. You can mix and match housings, trims and A/Rs to fine tune your turbo characteristics, but this basic premise holds - there is no mystical supadupa happy fun turbo that makes a 1000hp and full boost off-idle, despite what a lot of people might think. It's all a matter a preference and your definition of what "streetable" means. Some people find the stock twins in true twin mode too laggy. Some don't mind a T88. It just depends.

So, smallest to largest:

T66
T78
2835s
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G
BlackSnake98 said:
Out of the three: Consider all with cams, fully tuned, etc.

1. Best for street driving/racing

2. Best for 1/4 mile racing

3. Best overall turbo(s)

Which would you guys get if you could have any of the three?

Thanks!:D
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G
BlackSnake98 said:
Out of the three: Consider all with cams, fully tuned, etc.

1. Best for street driving/racing

2. Best for 1/4 mile racing

3. Best overall turbo(s)

Which would you guys get if you could have any of the three?

Thanks!:D
Click to expand...
Yeah, I agree with what Walser is saying here too. By asking for the best street/strip/racing turbo, you are essentially simply asking question #3 - what is the best overall turbo. The answer is that it depends on what you prefer. There is no magic turbo. You have to choose based what your desired application is going to be, and then choose a turbo. Then of course, you can get into A/R sizes which can affect power and spool as well. But for simplicity, I'll answer each question individually.

1. T-66. Just big enough to make good power and smaller than the others to spool quicker for the street.

2. T-78. This ones tricky and depends on if you use nitrous to spool larger turbos. But without nitrous, and assuming you have have a high stall and will launch like an animal, I think the T-78 probably the best choice only because the HKS twins are too big without nitrous to spool them.

3. There is no best overall turbo, it's a matter of compromises. For ME, I woudl choose the T-66.
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G
Thanks for all the help so far.. I guess what I'm trying to get out of all of this is... At what point (how far), from a stop, will the T78 overtake the T66, and how long for the 2835's to overtake both of them (consider the car a 6 speed w/2 step)?

Again thanks :)
~still learning
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M
If you are going to only drag race the car, then you would have better luck staying away from a 6-speed with a 2-step and just getting a built automatic on a high stall (~4000). Get a T63 or variant turbo with that and it has been proven to be a low 10 setup without any NOS. If you want to hit 9s with that setup, just get a bottle. The "SP63" spools very quickly, as I have found from personal experience.

Jerry Vodden from Chicago pulled a 1.40 60' with a stock rear end/suspension with a build automatic on a highstall last week.

-m
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G
No, it's gonna be a street car, and I believe I'd enjoy driving the 6 speed more than I would an automatic.. There's a decent street scene though (Need to be able to take out heads/cam/nos LS1's). This car isn't going to be a daily driver though...

Thanks for the help:cool:
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G
Hey Walser, from a stop, how long does it take your car to really get moving?
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G
On street tires, I get 2.1 or so 60', no NOS. It is definitely more difficult than a smaller turbo, but not impossible. For example, armed with a two-step and drag radials, a local T-88 Supra pulled 1.7 60's, no NOS. Coupled with some slicks and maybe suspension, it's obvious that a 6spd CAN get some good launches, though difficult.
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P
Hate to sound like a broken record here, but I completely agree with everything Walser has said. I would like to add, however, that although 'streetability' is a subjective word, and the phenomenon is hard to qualify, price is not. The T78 kit is cheaper than it has ever been. I drove a car with a T76 (Garret turbo bigger than a T88) and I now have a COMPLETELY different opinion about singles and lag. I used to think that if the turbo didn't spool to 10 psi in 4th gear at 3500 rpm IMMEDIATELY, the lag would be too much for me. This turned out to be a ridiculous point of view, because I discovered that boost with NO lag was just a downshift away.
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Sound Performance
PB PEDIS said:
This turned out to be a ridiculous point of view, because I discovered that boost with NO lag was just a downshift away.
Click to expand...

But what do you do if you are in 1st?? Thats the terrible thing about big turbos and six speeds. You cant slip the hell out of your clutch every race you get in unless you like changing clutches every weekend. All street races begin from a dead stop and most are won in the first 60' unless the cars are totally mismatched.

Lar
SP
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Sound Performance said:

But what do you do if you are in 1st?? Thats the terrible thing about big turbos and six speeds. You cant slip the hell out of your clutch every race you get in unless you like changing clutches every weekend. All street races begin from a dead stop and most are won in the first 60' unless the cars are totally mismatched.
Lar
SP
Click to expand...
Larry, of course you're right. But for me, 1st gear races just don't happen. In Florida, it's almost always a race from a roll. I know that's probably the exception and not the rule, but even so, if someone is committed to serious racing from a stop, whether it be 1/4 mile or otherwise, they probably won't mind investing in a small 75 shot to help out with that big turbo in 1st gear.
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G
Jeez what kind of tires do you guys have? I've got 315 BFGoodrich KDs, and I will bog BAD if I dump the clutch at anything less than 4700 rpm on the street. At the track that means a 2.6 60'. With stock cams, a T78 will spool at that rpm (not like it matters in 1st gear really).

Unless you have a sequencial car (mine is TTC) you'll have to slip the clutch at a decently high rpm. Not as high as a T88 with cams I guess, but you still have to do it. IMO lag is MUCH more annoying from those low speed rolls where your in between 1st and 2nd.

Interesting thing is that I never hear about AWD DSMs changing clutches as often as Supras that are drag raced. They have to slip it even more, or they bog worse. The ones around here pull 1.7 60's on street tires all day everyday (well if their trannies hold up). I guess its the ACT 2600.
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G
my vote goes for the T78. best bang for the buck, power to dollar ratio. quality is pretty good.

as far as racing on the street, i'd prefer to race from a roll rather than street. not up to insane speed levels but it's just not as "risky" if there are no traffic.

i'm sure a smaller turbo will get the jump but how big of a difference in lag is there? 500rpm? 1000rpm? how long does it take to rev up 500 or 1000rpm.

from a dead dig to 60' i'm SURE smaller turbos are best but anything after that i'd say medium or bigger turbo would win.




Sound Performance said:



But what do you do if you are in 1st?? Thats the terrible thing about big turbos and six speeds. You cant slip the hell out of your clutch every race you get in unless you like changing clutches every weekend. All street races begin from a dead stop and most are won in the first 60' unless the cars are totally mismatched.

Lar
SP
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ekool
Of course, if you have a monster turbo and you want to be able to slip the shit out of the clutch and not worry... Rob at RPS is working on a new carbon/carbon clutch that is, from what i hear... kicking some ass in testing.
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