I'm going single and would like to ask you guys for recomedations. Greddy T-78 or Apex I Rx6.

Which spools up quicker and which is better for srteet and stip use?

TIA Marco

 

The RX-6 is a smaller turbo then the T-78 there for it will spool faster than the T-78 and will start to produce power at a lower RPM than the T-78. However once the T-78 is spooled its going to pull hard! Is your motor stock or ported, how many miles do you have on it, and what is your goal? BTW have you taken a look at the GT35/40? If not you might want to...

 

the apex'i one spools faster for sure, but the T78 can be used for enomous horsepower gains. If you are primarily a drag racer, maybe the T78 would be a better option

 

Yep..... If you want something for street and strip you should definitely go with the RX6! But if that weren't the case then, in my opinion, the T78 is the BESSSST single out there, PERIOD!!

 

My motor is out and is getting ported and 3mm seals. My turbo was shot and that is why I am looking for the single now. Im also doing the fuel, fmic, exhaust, and ecu. Just trying to see what options I have.

 

Options? Many.

Search on the t-78 and rx6 spefically, but also look around for what's best for street, best for strip, etc. In my mind street and strip are two different beasts. For strip alone, personally I'd go with a larger turbo. For street alone, I'd go with something that spools a little faster...

IMHO, the rx6 may not be for you (I got it for quick spool up for street and, more importantly, autoX). You're going to get gobs more hp out of a larger turbo or even the GT35/40, which seems to be the swank new player that's a nice middle ground (tons of power, great spool up).

Those who have run through 2 or 3 turbos should chime in .

G'luck with it.

-E

 

the rx6 is the perfect street turbo, it has power where and when you need it on the street.

mike

 

i agree i have a T78 its good for max power a bit laggy but a great turbo. if you have a street car the rx6 is alot better spools quick and has enough power to run 11's

 

Personally I think the RX6 is a bit small. Most people are barely making 400rwhp with it.

IMHO, the T78 is almost too big for street use as your new power gear is 4th (110 - 150Mph).

I've become a major GT35/40 advocate. The dual BB and size provides great spool response, the water cooled core keeps things so much cooler than a non water cooled turbo like the T78, and it easily makes 400 - 450rwhp on pump gas.

K

 

i'm actually completely happy at 10psi on the street with my T78.... 95% of the time i am at 10psi for reliability and trying not to get my license taking away because if i give it WOT in 4th or 5th gear i look down and i'm at 130+ .... for the street, the hks t04r, gt3540, and rx6 are good turbos. that would be my order of preference too

 

I agree with most of the posts already. T-78 may be a little big for what you are looking for. The RX6 or a T04R sounds like good options for you if you are concerned with lag and streetability. Check into KKK turbos as well.

 

Thanks for all the replys. Yeah I guess the T78 might be a bit too big for the streets. It takes alot to get it going. I guess Im going to look into the GT 3540. I think the RX6 might be too small as well. I'll find something between the two. Ill let you guys know what I end up with. Thanks

 

rx7 store t04s. the inbetween and the less expensive.

luigi

 

If I was to have my car primarily for street/strip I would go with the XS engineering T04S kit. It makes good power, I heard that it's not too laggy but pulls really hard

 

I tend to agree with some if not most of what everyone said. However, the best I advice I could give you is try to attend (or meet) of couple of local rx7 club guys and get a ride in a couple of cars with different setups. You'll be able to see how much lag is tolerable for YOU. Also, note the rpm's as well as speed in which they tend to drive at since around town cruising will give the turbo's streetability and highway, well ya know. Oh, and don't forget to hangon!
From what it sounds like you're another gt35/40 guy so get a ride in one. IMHO, Apex'i offers the best quality if that's what you're looking for. But you get what you pay for big$$$. However, I've never had any Apex'i product fail on me (that's why my car is nearly 95% apexi aftermarket).

-ed

 

A concern of mine would be that if anything would happen to the turbo (Rx6) would it be rebuildable? I read in another thread that you wouldn't be. Due to lack of support here in the states. Is this true?

 

True. However the cost of rebuilding a hammered turbo with parts and labor is in the $1000-1400 range depending on damage. A new Turbo from apexi can be had for $1600.

 

hmmm ed has a point.....

 

I have a RX6 and it is a great street turbo but if I had a chance to do it over again, I would go bigger. I originally was looking for a 2500 to 7000rpm flat torque curve for every day driving. I achieved that but a rotary does not produce enough power below 3500 RPM to move 2900 LBS. sufficiently. With my current setup, I am rarely below 3500RPM unless I am stopped ( More like 4000 to 4500 cruising.) The RX6 exhaust turbine is very small and just does not seem to flow enough air in the upper RPM range (Choking the engine.) I stile have a lot of testing to do with my car before I am 100% sure. This includes pulling my engine to have a side seal replaced. I should do the engine myself but I have never done a rotary before and I really don't want to experiment with my own stuff. BAD excuse I know. So do a lot of research first and take advice from people who have been there or are there right now. There is a wealth of info on this forum. I learned a lot and stile am.

 

for the street, get the t04s or rx6. I have a t-78 and there nothing I can race around here@10 psi 98% of the time. i dont have a 1st gear and white smoke the tires in 2nd, 3rd where getn somewhere ... I even beat a viper gts@10psi.. it was a rich kid who didnt know his car. if you have some of those single turbo supras around, i think the t-78 would be a good choice. the lag isnt bad at all. I say the hell with lag and down shift. i guess a few people ant tried it yet but it works for me.
i dont understand why people race from 2500-3500 rpms??? why?? 5k is where Im at!!

 

93redFD, where does your T-78 make full boost at? Do you have a stock motor or is it ported? I've heard the lag isn't too bad on a T-78 actually

 

heavy street port. boost,,not sure. The lag doesnt bother me at all. I wouldnt mined something that spooled up faster but im not going to change anything. The bbT-66 would be the best choice in my oppinion.

 

 

isnt the to4r a big turbo??? I thought it was about the size of a t-88??? If its what I think it is then it should have lots of lag shoudnt it???

 

The TO4R is a large turbo IMO, it is streetable but capable of big power. HKS combined a smaller exhaust housing (I think it is .89) and a clipped turbine wheel, this gives relatively quick spool with a good top end pull as well. It is not as large as a T88, you are thinking of the T51R, the TO4R is more comparable to a T66 I would guess.

Personally I went with an HKS TO4E kit for a lot of reasons, the main one being that it will have en excellent spool time.. making for an excellent street turbo. With a ported motor 400rwhp is possible, and if that isn't enough I can just go with a clipped turbine or a larger A/R for cheap. IMHO 400RWHP is PLENTY of power for the street in such a light car, if I lived in the boonies and could haul *** all the time maybe I would feel differently. I've ridden in 600 and 800 HP supras and I just wouldn't want one, the lag is horrible, and when that thing spools I am just afraid of what may end up in the way with such insane acceleration. I must be getting old..

Matt
93 SSM