GoodfellaFD3S

iTrader: (213)

Thanks Mirabile. I think we should all avoid shitting on each other, after all---we're all FD owners, right?

the_glass_man

iTrader: (2)

The eBay turbos can make as hp. AFAIK the eBay kits also don't require you to dent your downpipe or shave your lower intake manifold to get them to fit.

mirabile

+1 on that

Glassman, can you show me some numbers on people making 450+ hp on one of these ebay turbos....

No_Rotor_RX7

well, i'll just throw some of my views out on this

i've actually installed T78's and a one of the new A-spec 500r kits all on FD's and crazy enough... stock ported. one includes our 3rotor car.

regardless these are my thoughts on the T78 and this is just from my personal experiences on customer cars:

- not as laggy as people think. i often see 10psi by 3000 -3200rpms and 15+ under 4000rpms. these cars all had 3" exhausts and included the wonderful dent in the downpipe hahaha

- these turbos are a little on the heavier side but they are very reliable... especially for the person wanting a high boost application! i've personally seen these turbos run at 25+ psi on daily driven setups (piston cars, but methanol injection is your friend). and yes that means they have one boost setting and it's that high, not 10psi day and 25 weekend

- wonderful power curve. pulls insanely strong till you need to shift. we have had varying numbers but our best was 460 @ 16psi on a 2 rotor and we did 540rwhp @ 11psi on a stock port 3 rotor we built using FD plates. we recently did one for a guy who just had a mazda reman in it and @ 10psi we saw 300hp before there was some insane ignition breakup at 6k plus so i'm sure it would have been plenty more for such a low boost level. these are dynojet numbers by the way... altho we mostly tune on a mustang dyno.

- the T78 has great housings as they flow very well and really help with top end power and keeping egt's down.


now here's my opinion on the A-spec 500r kit:

- also a well built turbo. it's wheels are very very similar to that of the T78 but is smaller on the turbine side.

- you have choices of what hotside to run.

- the first car i put this kit on was a stock port FD. spool up was nice but i wasn't seeing 15psi under 3500. it DOES have a more linear build up than that of the T78 but after literally driving both back to back it's not that great a difference.

- on said car we barely saw 300 @ 10psi. i'm installing another 500r very soon and both cars will be getting tuned for 15 or so psi shortly so we'll see. but i have street tuned one to 12psi and it does have a good 'seat of the pants' pull to it but it still feels like a 300rwhp fd. NOW granted... this is a conservative tune to an extent. we don't want these people blowing their **** up when they leave just so they can say 'i got 400rwhp yayyyyy'. which honestly there is so much hype on the 500r that it's been a hassle to us because we keep hearing "a-spec made 450 @ 15psi so i know i'll get atleast that", we actually have one guy soon to order the kit that said "when you tune my car, just tune it for 500rwhp on pump... that shouldn't be an issue from what i read"... oh noes

THAT ISNT A SPEC'S FAULT... these kids just read the hype on here that alot of people have built up, yet most of the people that talk about the numbers they will get... haven't actually dyno'd their car. i have another shop that did a 500r recently and they have yet to be able to break the 400rwhp mark on pump gas (stock port rew). they don't want to go over the 15psi mark... altho they are very very close.



ALL IN ALL:

- FIRST I WANT TO SAY I LOVE ASPEC! i am not trying to down the 500r in any way... just giving an honest comparison from the cars i have done.

- they are similar and you honestly can't go wrong either way. if your looking at buying a whole kit then the same can still be said. i love greddy's turbo manifold on this setup, but A-specs manifold is super as well + they have that lifetime warranty on it.

-A-spec has great support and are here in america. they are great guys and are very willing to help out and work with you on custom setups. i just don't want people to bash the T78 when it truly is a great performing turbo. sorry this is so long

mirabile

I need to copy that into my for sale thread...

olyrx7

iTrader: (3)

I think that many companies have good turbos, but the results on the dyno will vary due to so many different factors.

Porting varies from engine builder to engine builder, tuning, intercooler size, exhuast size, etc. All these play key roles in the amount of power you would put down on the dyno.

I think the t-78 is a good street turbo, and it will put down lots of power. The 500r is also a good street turbo, I guess it comes down to your own preference.

Plus whats the goal for power? Personally, I am going for the 650whp range so I am sticking with my modified greddy t-88. But if your going for 400-500whp max, well then you obviously want a smaller turbo, it only makes sense.

No_Rotor_RX7

you hit it on the money Oly. there really are waaaay too many factors involved.. even down to altitude and hell not every dyno is going to be perfectly calibrated to each rx7 that rolls up there

as i said, like you did, it just boils down to personal preference... if you really do need that little extra spool up then go for the 500r. that car actually returned to us for a small idle issue and i got to drive it again.. and immediately took out a t78 car here and had a good mind refresh.

i'll take back my earlier post just a tad... the 500r will make the 15psi faster, probably by about 4 - 500rpms but both will fly to whatever boost you need once it gets in that range within a heart beat.

again, the a-spec kit is great.. if you have found a good deal on a T78 tho and that being your main reason for asking then don't be afraid to get it. it's VERY VERY streetable

Zero R

iTrader: (1)

Lets not turn this into another pissing match shall we, I have seen them running anywhere from 436-448@15-17lbs, none of those cars that I know of are running the multiple ignition boxes the Broken09 has on his car, none of them are running the 1.06 housing, that I'm aware of, and none of them are running the full 4"exhaust with open wastegate. Combine that with porting, timing, and IC and who knows how far the difference can be. You know this. You can not fudge numbers on a dynojet that is the main reason I bought it. That way I don't have to hear people think I fudged the settings as you can on the inputs of other dynos. I do not give out or guarantee #'s never have, never will. I post up our results that we get and I let people know theirs will vary. I have some customers put out better numbers than we have I have some that put out much less than we have also. You know as well as I do that because "X" put down so much hp doesn't mean everyone else will.

Holy crap! Blast from the past!! What numbers claimed? Where? Your an idiot if you think I can fudge the numbers on "MY DYNOJET." T-78's are no more proven than any other turbo out there. It shows nothing but stupidity on your part to think that HP is a function of turbo alone. Funny how you don't seem to mention both Ralph or Ernies kits. Ralph got 681whp last I talked with him, and Ernie is pulling 643whp. Both on A-spec kits thank you. Or what about TrentO on here who is getting 470whp@17lbs on my 35RT4. I get so tired of people blaming "x" product for what could be any number of factors. As "Jason" also said "Although there are other variables that play into that like engine porting etc.." spoken like someone who may actually know a little more than some about what's involved.

-S-

Broken09

iTrader: (1)

Interesting to note that there are three different shop owners in this thread running A-spec kits ;-)

GoodfellaFD3S

iTrader: (213)

Who is the third owner?

This thread just got more interesting. Some people don't seem to realize that it's all give and take, larger comp/turbine wheel vs smaller, ball vs journal bearing.

I used to always argue with idiots who couldn't understand that the BNRs were more efficient than stock twins, despite being a full 20% bigger in the shaft, comp and turbine wheel......

Broken09

iTrader: (1)

Xessive, Rotorsports, and You used to be were you not?

GoodfellaFD3S

iTrader: (213)

Still am

No_Rotor_RX7

crap, please don't anyone think i was bashing on the 500r kit. as said it's a wonderful kit.. my only purpose for doing a comparison is because the original question was if the t78 is streetable and since everyone was mentioning the 500r i just figured i'd give some examples.

i am always quick to tell our customers that A-spec kits are fuggin great we're installing another 500r kit within the next couple weeks and have another fella about to get one.

and just for the hell of it; i'll mention that we found a bad boost leak/ vac leak within the throttlebody of the 500r fd that returned. got that sorted out and i turned up the wick just a little i'll just say this for now... the turbo is starting to show it's true face.... me likey

i also believe we may be getting a-specs bad *** 3 rotor exhaust manifold... sorry that has nothing to do with anything haha

woods420

very fun at 25 lbs a little old fanished tho.. some lag