Hi people,

I have a TD06SH-25G for my FD, genuine GReddy Kit.
I will use my FD only for track racing, 90% drifting and 10% Time Attack

My plans are to run with E85, AI (water only), target = 400 WHP or more with less lag as possible.


So I was wondering about my TD06... I don't think that he is the one I search, maybe the T04Z will be more appreciated ?

Or maybe another ?

Thanks !

 

the TDO6 makes 690 CFM at 20.5 psi.

690/1.92 = 359 rear wheel rotary hp maximum.

if you are drifting you need hp right now and so i would skip the TO4Z which is too much turbo for your 400 target. ( 1056 CFM/1.92 = 550 rw rotary hp.)

go w the GT35r or GT3574 (A-spec... larger hot side) ... 897 CFM/1.92 = 467 rw rotary hp max.

howard coleman

 

What a clear answer

Thanks Howard !

 

Hmmm, maybe someone can explain / validate some things that I guess

First, the GT35R seem to be only available in T3 flange ?

Next, what I always find good reading about T04Z, spool "fast" (~4000 rpm with stock ports as I've read), good output (not what I'm aiming, but if it's a bonus...) ...

So I'm not sure about the choice. Running 400 whp is my primary target. More ? Why not, if the spool is still good. I guess with my stock port I will be somewhere in the 450 / 470 whp.

Someone has cons to say about the T04Z VS GT35R for this application ? (track use / mostly drifting)

Thanks again, et sorry if these questions have been answered yet, I've found a lot to read but still not sure

 

You can get the GT35r in a T4 flange, you just need a bigger hotside. The GT35r isn't a very large turbo, at least not to me. But the larger hot sides will come with a t4 foot print.

A lot of people choose the smaller hot sides for drifting for fast response, they sacrifice horsepower for the immediate spool.

 

Howard, I found this compressor map of the 20g (even a bit smaller than his 25g).

According to ZeroR

By looking on this compressor map, 2.0 pressure ratio (15PSI) can max out flow at 640CFM or 44.8LB/min

Now multiply that by 7.69 x 44.8 lb/min= 344 rotary wheel HP.


Now if I go by your 20.5PSI rating with the previous calculation, I get 2.39 pressure ratio. If I map that out on the compressor map I get approx 700CFM or 49.2 lb/min.

49.2lb/min x 7.69 = 378 rotary wheel HP



Can I ask where you got your calculations from? They seem off.

 

[QUOTE=Vell;9705260]

Next, what I always find good reading about T04Z, spool "fast" (~4000 rpm with stock ports as I've read), good output (not what I'm aiming, but if it's a bonus...) ...

[QUOTE]

You wont have boost by 4k rpm especially with stock ports. I just bought a car with a t04z on stock ports and i dont remember it hitting boost until about 4.5k rpm. I only really drove it once before i tore it apart, but its a pretty laggy turbo. Plus its expensive.

Get a 35r like others have said.

-Austin

 

Or in all honesty keep the TD06. I have one, and when my car was running last summer it was a blast. 10PSI at like 3k RPM. And it hauled pretty good at that PSI and I was faster than a lot of cars out at the track.

 

I concur with Howard, get a Gt3574 (from Aspec0 with the ball bearing option. BTW, if you plan on running E85, there's no need for aux injection, not too mention the tank size you'd need for extended events would be big and pointless on E85. The T04R or T04Z is a mid/large turbo and you'd be disappointed by it's lack of response.

~Mike................

 

bc fd3s:

first off i did use the 20G map. 'my fault, as after taking another look the turbo is the 25G.

as to the numbers... the pressure side of a compressor map keys off 14.7 psi as we know.

2 pressure ratios is 14.7 psi on a boost gauge. i just eyeballed the map looking for max gross air which looks like 690 or thereabouts. i roughed it at 2.4 or 20.5. actually, it is a tad less.

690/ 1.92 gives me 359 rw rotary hp. there are other ways to get close...

for example 690/14.471 = 47.6 lbs/minute/1.3 *10 = 366.

or your method.

take your pick.

howard

 

... ok good to know. Not bad for a eyeball guess.

A real calculation is very hard anyways since volume is effected by heat. Also engine porting will come into play.

All I can say is I have been very happy with my TD06-20g and for what I need it to do. It will be going back in on my new engine from DJSeven after a rebuild.

 

Don't mr RE always use the td06 on all his drift, time attack and touge cars...Says due to the response down low and says it's never about Hp with

 

Very interesting answers and advices but now I'm a little more confused about the "ideal" turbo setup for my application ...

And yes 7passu, but I guess the GReddy / Amemiya drift car use another turbo now (don't remember if it's a T78 or T88 one).

 

The one thing I missed up there... E85. If you are in fact going to run E85 stick with the TD06. You`ll make more power than what we have been saying looking at the compressor map. No need for WI if you`re running E85 but I guess it can`t hurt.

You`ll get fast spool and 400whp no problem.

 

The TDO6 seems like a great spooling smaller turbo, great for auto-x and drifting which don't really require heavy HP. <400rwhp is more than enough for them...

...but isn't a T04Z an excellent road racing turbo too?? I like the idea of a turbo that spools quick enough for road coursing but would still make enough power for a killer 550+rwhp highway car. I thought the T04Z was the best spooling 500+rwhp turbo that money could buy? Opinions...

 

bc, are you sure that the TD06-25 can give the 400 whp using E85 ?

Viper, the thing I can read there is the T04Z is something like... overkill for my application ... ?!
(and need more modifications to handle the torque / power, the main reason for going to the 400whp limit).
For the TD06, you are right, bur drifting with more power is very comfortable even if you can get a similar result with more "wheel work" for the driver ! At a competition level, it's very good to back up with the power you have (and I know : it's like cheating ^^)
I'm bored about underpowered cars (like my Bimmer)

 

Well considering my TD06 - 20g made 370 on 91oct. It's smaller and I was on regular fuel. These turbo's don't even fully scream until 20+PSI. If you throw water injection into the mix, which you really won't need with E85 you'll make 400+whp no problem.

Why is 400WHP the magic number? An FD with 350WHP is still VERY fast for the small, light car the FD is. 23-30whp is not really going to make a huge difference except you're going to start breaking driveline parts. Anyways, yes 400whp with the 25g.

 

Thanks for these informations I will educate myself a bit more about the 25g with E85 so
400 whp is my final target, I will do it slowly, carefully !
But I didn't expect that the 25G was capable of giving these numbers.

How much psi for your 370 with the 20G ?

 

I agree, go with a 60ish mm turbo. Guys at turblown also sell that GT3574.

People have hit more than 500rwhp with that turbo, I think your math is off

 

i'd recommend doing more independent (aka not on rx7club) research on this subject.

for most rx7 owners, something like a gt35r is considered "small" and they do not consider the needs of drifting.

my opinion: a gt35r is pretty good drifting, a gt40 almost too big. gt35r will break 400 no problem, with good spool depending on the tune. whoever didn't see boost till 4.5k on theirs.. i feel sorry. right now my tuner is tuning a bridge port fd w/ gt35r, that reaches a full 15psi by 4k. once he's done tuning it i can get you the dyno sheet if you'd like, it's pretty obvious how the turbo is spooling.

the t04z will give you much more potential, and better high end hp. the gt35r will have great mid-range, but at the top end it falls out of the turbo's efficiency range.

me, im going to go with a holset hx35, not something many rx7 owners have done, but from the compressor maps i've looked at i think it will be perfect for MY needs. i only need 300whp, but with the hx35 it should support up to about 450whp, with very fast spool characteristics.

check out the drift section of rx7club, ask questions, look at others setups. drifters are a different breed of rx7 owners.

 

Yeah you're right, especially for the difference between drifters / rx7 owners
I read everyday the drift section in there, very usefull informations by the way !

But I think bc_fd3s has answered my question, with the calc from Howard + considering I will use E85, the TD06 seems to be able to reach the target ... as I have the stuff, I will reconsidering the other ones after a properly tuning session on dyno if I'm too far ! Or on track if it's not as I want !

There is always very interestings posts in there anyway ^^

 

I would not use the TD06H-20G map as reference as there's a huge difference with what you have (TD06SH-25G).

The 25G compressor wheel is much much larger than the 20G but very close in size to a 35R compressor. The 25G has an inducer of ~60mm and the 35R ~61.5mm. A TD06SH turbine is also different in size compared to a TD06H. Again, do not use that map as any sort of reference.

You're going to have no issue making 400WHP with the TD06SH-25G.