Is the GReddy T78 turbo streetable?
 

Someone told me that the T78 turbo was very streetable. Is that true in your experiences?

Thanks in advance for your input!

What is streetable or not streetable is a matter of opinion.

To me, there are better choices out there for streetability....

What are your rwhp goals and at what boost level and with what mods? Do some snooping in the single turbo forum here... I'm sure that many of your questions can be answered by using the search button :)

I love it, have found it to be a blast on the street.l

I have used the T-78 on both my RX-7's and its great for the street. A little on the laggy side but thats what downshifting is for.

Jason

Love my T78, but for daily driving I just run 10psi. I think thats around 350 at the wheels. Yes its a little laggy compared to the BNR's I had running non-seq, but the kick in the pants when the T78 spools makes up for the loss on the low end.

It doesnt take some adjusting to your driving style, going WOT when the wheels arent straight isnt a good idea :)

But any way you go, go single ! .... Less stock crap to deal with

^indeed single turbo is the way to go.

Streetability is a interesting thing, especially when talking about single turbos. Having a single turbo is like having two cars in one. With a larger, laggier turbo, you can putz around town up to 4500 rpm without getting into too much boost. If you want full boost sooner, just downshift. With a GT series turbo or a much smaller t-series, you are into full boost way before the 4500 mark, which I personally don't think I would like for driving around town. With a GT series turbo, if you want to go a little faster in town, but stay out of boost, you have to up-shift, and then you lose much of what little torque we make in that power band. I'd look at it this way: You're either full on or full off from either 3500rpm (gt series) or from 4500 (t-78). With the t-78, you get an extra 1000 rpm in say 2nd, 3rd, 4th gear when your out on the street and don't want to be boosting. To me, this sounds more "streetable".

Well your analogy makes absolutely no sense because if you're not going full throttle you're hardly going to make any boost at all with the quicker spooling turbo.

btw,
you should save some money and buy mine, because I loveddd it.

http://i72.photobucket.com/albums/i1...Picture062.jpg

Personally I feel a 35R is much more streetable than a T-78. I *like* having full boost at 3500 rpms :)

nooo rich noooo

why do you think I went with the 500r instead of a Greddy T-78/Turbonetics T-66/Garrett T04R ;)?

Didnt have the balls for the big boy turbo? :buttslay: :buttslay: :buttslay: :blue: :rofl:

I Agree With Wargasm. What Are Your Goals. I Run Greedy T-88 On The Street. Love It. I Just Love Keeping The Rpms Above 4000.

Well, based on the sheets I've seen, the 500r makes just as much power at a similar boost level as the antiquated T-78 does (450 at 15 and 500 at 20) but spools much quicker (15 psi by 3500 rpm). Plus, it's claimed you can push the 500r to run just as much peak boost as a T-78. Why have lag when it's not needed ;)?

Your dyno sheet says otherwise. 421=/= 450. Also at 17 psi.

muahahaha

I have seen a couple of dyno sheets on the 500r and the only one that put down similar power to the T-78 was on A-specs dyno. The others were a lot lower and at higher boost. Although there are other variables that play into that like engine porting etc..

Nice try, but that dyno sheet is from my old setup (BNR stage 3 twins). I have yet to dyno my new setup.

Here, click this link:

https://www.rx7club.com/showpost.php...4&postcount=13

Then change your sig buddy, you have it as 500r powered, but list 421whp. nice try my ass- if you knew how to set up your sig properly it wouldnt have been mentioned. BTW a-spec kits are known to not put out the #s claimed. IE, 40r. EXACTLY what jason said THEIR DYNO- THEIR KIT, of course its going to magically make the #s claimed. Ill stick to proven power, a lot of these newer kits just arent performing they way they are advertised.

How come noone posts track #s anymore? Scared their 450whp beasts are going to trap a mph relevant to the real whp they are putting down??

Well, if you want to be a prick, that street runs both ways, junior. First off, I'm not your fucking buddy.

Second, when you click the dyno link in my sig, what do you see under the hood? Exactly.

Third, show a little respect to those who have been in this game a lot longer than you, and contributed a hell of a lot more to the community than you.

The difference between you and I in this thread is that I'm informed. I know what is inside a 500r, and you don't. That's not your fault, it's not common knowledge. I guess I'll see what my setup makes soon enough, but I've been around enough T-78s to know that they're too laggy for my personal tastes and application.

Ghost. Dont mess with Rich, he is a good guy.

T-78 ha! Talk about a paperweight. Can it make good power? Sure it can, so can $50 eBay turbos. I've seen T78 cars make under 300 hp and make over 500 hp the turbo is only one small part of the whole equation.
The Trust (GReddy) is proprietary modified Mitsubishi turbo that weighs a ton, isn't water cooled and has none of the benefits of the newer, more efficiently designed GT series ball bearing turbos.
It's also next to impossible to get authentic parts for when it comes time to repair so you end up with a Garrett hybrid anyways. You also get squat for support from GRedddy.

Wow, I do not disagree that the GT series are better, but I would not call the T78 a paperweight at all. Any turbo set up capable of well over 500hp is no paper weight. Did you have a bad experience with Greddy? I have always had good dealings with them...

PS. You just compared a 50$ ebay turbo to a 4k kit. :rlaugh: