wptrx7

with all these turbos how did you choose what was best for you? what questions did you sask yourself or others? and with what you came up with, was it what you were expecting/looking for?

i need help with trying to figure out what i should be looking for in a single (not just power and response). i want to see if there is more.

i like the reliabilty of going single.

i want close to, not exactly, the response of the twins.

i want low boost high rwhp.

i don't plan on going to the track everyweekend.(more like a bunch of friends saying we're going to track, wanna come. ok.) twice a month if you didn't get it.

400 @14 psi, but in no way maxing out the turbo. i want room to breath, just incase i live for the track.

i think the gt 35/40 is the key but now i'm hearing about the t66bb and i m interested. the t78 is always on my list because it seems to work for most people. i have not driven in any single turbo fd yet, because everydody seems to be in the shop or breaking it in. i want this **** to last to, i don't need to fork over 8k and have to go in for another single, i understand rebuilts may come up, but i just want theat and not a whole new setup. this is going on a year now for me looking only because i like to only buy once a. i am not powerexcel, i want the right turbo for mr the first time.

thanx for any help, luigi

94 fd

Maxthe7man

I have a magic 8 ball for making tough decisions..Max

wptrx7

thanx, does any one else have any magic powers?

luigi, see gordon can't get a response from these guys.

Wargasm

You want what -everyone- wants. Response of twins, power of a T78, 400 rwhp at 14 psi. Unfortunately, that's not an easy task.

I'll plug my webpage here!

http://www.catenet.net/dyno.php

Go there. That is an interactive dyno comparison tool that I made. It stores REAL dyno datapoints in a database and lets you pick which ones to graph for you. It's not 100% accurate, but it's about 98% accurate and is a GREAT place to start thinking.

Some comments:

o Nothing will have the spoolup of stock twins except stock twins (or maybe modified twins?). I'd avoid the modified twins for a few reasons... 1) not many people have them 2) you want the simplicity of single. I don't think that there's anything WRONG with them, just doesn't sound like what you want. Apex RX6 kit might be a good pick from the spoolup standpoint, but it will not have the power potential of some of the larger turbos at low boost. T04E might also be similar to the Apex kit in terms of response vs lag vs required boost. Check my page

o Something like a T78 is a great pick because lots of people have them and there is no doubt that you can make big numbers at relatively low boost. The problem is lag. Nowhere near the stock twins in terms of response.

o My personal opinion on the GT 35/40 is that it isn't very well "tried and true" yet. Not many people that I know of have used this and turned in dyno charts to me. Notice I said, "to me". I am not trying to flame anyone with this turbo... In fact, I only know of one person and that's "Silver93TT" on the forum here. His numbers look quite nice to me, but he's my only datapoint on that. I'm just saying that doing something that is a little different than most people is expensive sometimes

o T04S (what I use) works for me. It has good spoolup relative to its power potential. I made ~400 rwhp at 14 PSI on this turbo with a streetport. It's bigger than the T04E or Apex but not quite as powerful as a T78 seems to be. In fact, it seems pretty close to the GT 35/40 based on my one dyno sheet.

Anyhow, I'm still a relative newbie to singles myself so shop around for second opinions from some of the more experienced guys. Do searches on the forum here for every turbo kit and read up what people have said about them.

Brian

maxcooper

Cool web page, Wargasm! Nice work.

-Max

Maxthe7man

My smartass comments aside, I went with what seemed to be a middle of the road turbo for the 13b, I knew if I went with a T04b, I would have wanted a T04e later, and I was not willing to spend t-78 or gt series money until I had driven a car with a 'large' turbo on it for awhile to see if I could live with the car , and the car could live with the power.
I though about Hybrids for awhile, but they are a compromise from the getgo, and you are still confined by the small exhaust housing, reguardless of how much boost you run with it.
I spent alot of time reading Australian web pages, and the common thread it seemed among the various high powered street cars with rotaries was a T04e p trim with 1.15 a/r and .70 front cover, so after seeing numerous cars with that turbo and looking at various setups and dyno sheets, thats the way I went, I knew with a good divided manifold it should spool ok, and reach full boost no problems.. It is a bit laggy coming off of the hitachi ht18s stocker, but yes , once its on boost, its a very powerful combination, I use to watch my boost fall off at 5000, now I watch stay even right up to 7000 rpm, the pull it adds to the car is breathtaking to say the least.. My first gear sucks now, but who really drives in first anyway? Max

LUV94RX7

iTrader: (3)

XS-Engineering T04e kit from RX7store.

I have done some extrapulations from the XS-Engineering site of their T04e turbo kit which I have. Here is what they have on their site with the mods listed and what I think my car should do at 15psi. Their's was at 13psi.

w/ XS Engineering Single Turbocharger System (Street-spec):Max Power = 370.3 @ 7100 RPM
1995 Mazda RX-7 (FD3S): Stock engine, A'PEXi N1 Exhaust, A'PEXi Super Intake, A'PEXi AVC-R Boost Controller @ 13psi, A'PEXi Front Mount Intercooler Kit.

RPM XS My T04e
2.5 70 70
3.0 100 110
3.5 150 165
4.0 200 220
4.5 260 285
5.0 290 320
5.5 320 350
6.0 340 375
6.5 350 385
7.0 370 400
7.5 350 385

Ken