I got a chance to run my '88 TII a couple weeks ago and was pleasantly surprised with the time. I was expecting low 15's since I had read that that was the stock number and I had a lot of extra weight in the car (full tank of gas, 30 lbs of tools, spare tire, heavy stereo amps and speakers) but I managed to run a 14.818 @ 90.00 mph. I know that the car has an aftermarket cat-back exhaust and a crappy intake (cone filter) but other than that I think it is stock. It did also have a fresh rebuild on the turbo and 67K on the engine.

So what is a reasonable time for a nearly stock S4 TII?

Also, how tough is the stock clutch?
It didn't feel great on a couple of my later launches. It was a little hard to tell what it was doing since I couldn't hear my car over the other cars at the track. I'm hoping that it was simply spinning the tires but like I said it was tough to tell. It feels alright now and doesn't slip in a high gear which is usually where a bad clutch is evident so hopefully it is alright. Someday I would like to install a lighter flywheel and a better clutch but I have neither the time nor the money now.

 

what track let you run with tools/subs in the car? im calling bs on that

 

Running full exhaust? Is your waste gate ported?Nice time!

 

The track was the New York International Race Park. It was a test and tune session and they weren't picky about anything until you got under 13 sec. Even then they didn't care about much other than having a helmet and decent tires.

The exhaust is the Racing Beat cat back system and the waste gate isn't ported. The aftermarket gauge shows 7psi boost.
Thanks.

 

thats a respectable time for a stock S4 TII.
When I first had my car, stock S5 turbo engine with RB REV TII in a GTUs, it did a 14.5
I had half tank of gas, my tool box, and basically full interior with spare and jack.

I felt that the time couldve been better if I had better tires. Did a 60' time of 2.4secs on Fuzion zri that were 2-3 years old or so. The wheel hop didnt help either lol

 

RIT man. Me too!! Was that Empire?? I went down there a while ago with a few other members from the RIT Car Club but we got rained out.

 

This site and others claim an S4 TII's factory time as 15.2. Hooah.

 

Nice. Do you have your RX-7 on campus? Im surprised I havent seen it. I have seen 2 other white FC's recently. And yea it was at NYIRP.

13B Etc
That's cool to see a similar number for the stock time. I'm still surprised that mine is quicker. I wonder if the stock time was limited by traction. My car certainly has wider stickier tires than it did originally.

 

^^^ Mine always sits in 'B'itch Lot being a freshman. There is a guy from the car club with a white one that does some drifting events and such. His name is William. I keep hearing of a black one around. Is it yours?

 

Cool. Yea mine is black so that's probably it. Is William's a turbo also?

 

No, his is N/A like mine.

 

Ran my 87 TII back in 1997 15.2-15.4, bone stock 90 deg day. Added cat-back and ran in 70 deg day and ran 14.7 IIRC.

Ran another TII, lightened quite a bit, 9-10psi boost cool day 13.4 105.5.

 

For modded rx7s id say 14's or lower are pretty respectable for a turbo 2 (200-300whp) ; 14's - 15's are respectable in an na that's modded (135-170 whp).

rotary > pistons

 

Cool thats encouraging. I can't wait to have a little more time to get some more power out of the car.

turbojeff
What did you do for weight reduction? And how much weight did you save?

 

I'd love to see the timeslip for that... Not doubting, but that's a really nice time for a near-stock TII. As a point of reference, when my car was n/a and lightly modded, I was running 17s.


I was going to ask if you're dim, but looking at your location, you're not from the US... here, as best I know, most drag strips will let you run whatever until you break into 13s, then as someone else (correctly) mentioned, they are mostly concerned with you having a helmet, and then a rollcage at 11s or so.

The only part of your post that's true is the last sentence (fragment)

...an n/a, (not ported, at least) you're really not going to see better than 16s unless you've got a stripped-out car with a nice exhaust and slicks.

 

My s4 na was streetported , intake, header back exhaust, upgraded clutch, lightweight flywheel, and Jacobs rotary master ignition box.

I had the power and weight reduced to break into 15's but I didn't have an LSD to get a good launch/60 ft time. My car was a base model with a 5 lug conversion, gutted interior for the most part, removed ac, power steering, air pump, and all emissions.

For turbo I think 14s is decent shouldn't be hard to get. 13s and less are where you're really starting to get fast

rotary > pistons

 

You'd be surprised at how much of a difference the full RB exhaust makes on a stock TII. Your boost will go up, maybe to 10psi or more, and thats where you'll make the power. I remember running 14 flat back in the day with a RB downpipe, intake, fuel cut defender, no ps/ac, 10psi. Keep up the good work.

Note: If your aftermarket gauge is reading 7psi, a weak/old/worn wastegate spring comes to mind.
Also, a fuel cut defender of some sort should be considered at this time, since the weak wastegate spring is keeping you from higher psi (engine kaboom range without fuel cut defender).

 

Yep exhaust upgrades are a rotary engines best friend, especially turbo.

rotary > pistons

 

MmSadda
Here you go. I was car #91. The left was the first run of the night and the right was the last run.


Yea I certainly will do a full exhaust when I get more time to work on it. However, before I do I would like to do a standalone fuel management system. It will be a lot of work but to really take advantage of any further modifications it will be pretty important. I am familiar with the MoTeC M400 so I would love to use one of those but they are ridiculously expensive. AEM's new ECU looks like a decent knock off but isn't all that much cheaper. If I have more time then money I might get brave and try to make a Megasquirt work.

 

We ran this car in the 2002 Grassroots Motorsports challenge. We wanted the car to be light for performance but not look like a gutted rat rod...

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With that in mind mods were:

No AC or PS
DP, pre-silencer w/3" straight pipe cat-back
No cruise
No heater
No stereo or speakers
No front or rear bumper reinforcement (not recommended at all for the street)
Spare tire, jack, etc removed
300Z wheels (lighter that stock TII wheels)
Removed all emissions and solenoids

For the drags we ran stock skinny spares on the front and no pass seat. IIRC it weighed 2400lbs for the drags, 2450lbs for the autox.

 

it's your 2.0 60ft times, a stock turbo II runs 2.2-2.3. the intake and exhuast mods increase flow a good amount, but not enough to over come the wastegate at this point, thus 7psi is still maintined. i wouldn't call your car stock. do you ever hit fuel cut in high rpm high gear?

 

I don't ever hit fuel cut but it is possible that there is some kind of fuel cut defender. I haven't seen one but it does have a lot of sketchy wiring.

 

nice times for stock. this site says 15.0 stock

 

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OE turbo clutch is good for about 350 wheel horsepower.