kkekeisen - i've had the kazz rear since july and i don't really hear it anymore, but passangers seem to always notice the noise

 

OK, I admit Ive only been here for a year...I try to learn everything on my own, but I dont know what 'ET streets' are!? Tires, yes, but what about specifics!?
Call me what you want but Damn-it I want to know!
Sphinx.

 

Well, I have had my KAAZ now for almost 3 years, it doesn't chatter or clunk on straight acceleration(fast or slow) but when the clutches engage and catch it does clunk but this occurs when turning at slow speeds under light acceleration. I have gotten used to it so it doesn't phase me anymore but it definitely gets the attention of any passenger that has never ridden in the car before. I really do like the way the KAAZ performs, not only is it stout, it distributes the torque evenly on tight turns on the road course that I drive with the Porsche and Audi clubs.

Sphinx
ET streets are a DOT legal drag tire, it has a nice and soft compound with a nice soft sidewall for flex and wind-up on launch and has slight grooves in the tread which make it "street legal", but they aren't that much fun to drive on the highway. These tires differ from true Slicks in that the tread compound on true slicks is substantially stickier/gummier than that of the ET Streets. Hope that helps clarify better.
Art

 

Ahhh! TYVM! That does make total sense. I appreciate you taking the time to explain a simple part of RX7 dynamics! LOL
Really TY, Sphinx.

 

I don't know if anyone asked this or not, but what were the track conditions and elevations? Is this a "time friendly" track? Those numbers are very good. Even with my Lightning, all the east coast guys have much better times than us west coast people.

 

Not really, most people complain about that track. Its just avg. I think its at around 500 feet for the elevation, I dont really know about the conditions (I wish they printed it on the slip). Just as a guess I'd say it was in the 50's....I have no idea about humitity or anything like that. I didnt do a burn out at all. I just pulled up and went, as a matter of fact its the first time I've floored my car in first gear lol (cause on the street its useless haha).

Hope that helps some.

STEPHEN

 

christ man, that is a great trap speed. Once I get the 99 spec turbos tuned for 15 psi, I'd like to meet up finally and head to the track.
damn, 125, damn.
Tim

 

Yea thats exactly what I said when the guy handed me the slip....followed up with "holy ****, I cant believe it"

I seriously though it was going to be like 119 or so as easy as I was driving. You just dont know how excited I was LOL

Yea, we will definatly have to head to the track sometime!!!! Tim how far are you from B'ham???

STEPHEN

 

Congrats Stephen

No excuses for next time.......I wanna see low 11's or possibly a 10 sec pass

Later

 

Reaction Time: 1.267 you gotta work on that ;D

NICE run!

 

Stephen, just ran your car/power spec up on car test 2000 (inputed your power curve from another post)

Now with the soft launch (differnet traction factor) got a 2.2odd sec 60ft 95mph 1/8th and 123mph quater in 12.4 odd second time.

Adjusted a few variables to take into account stong single plate clutch and shift clutch pick up time of around 0.3 seconds.

With a full race prep 100lb weight shaving, fast gearbox shifts 0.2 seconds (slam it home!) and launching at 8000rpm with slick tires, the best I could get were 10.85 seconds @ 127.3 mph with your standarized power curve. Now this does not take into account that at the low temps you are experiencing now you are actually making about 5% more power than what you would on a std temp and pressure day........so get your run in on a cold enough day ! just do a big strong burn out to warm up your tires and touch wood you will crack a 10.

the only thing that is super critical is the length of time to change gear, because you have under 500 bhp at the weight you are running if you take 0.3 to 0.4 seconds to change gear the best time I could get was 11.09 seconds @ about 125mph (taking into account of lower tires pressure on drag slicks and increased rolling resistance) 60ft time was 1.6 odd seconds.

So you realy have to launch it very hard, get super grip and shift like crazy to crack a 10 with the power curve level on the graph you posted. May want to try 20psi just to be sure of your 10sec pass mate

Good luck ...... either way you have a killer car in my books

 

Excellent figures on those BNR turbos. I am sure you are a aware but just a jog of your memory incase anyone has forgotten the rx7 type rz in Japan has strengthened ltd slip diff ratio of 4.3 as standard. It might be well worth getting a second hand rz diff from Japan I think it has the right final drive ratio you'd be looking for and you won't have none of the chattering noise from most of the other aftermarket ones.

RGDS
Brain Ellis

 

Can anyone confirm is the RZ rear end is in fact STRONGER than the 93-95 rear??? I though it just had a different gear set

STEPHEN

 

WOW, I was right on track with my estimation then. I figured I could pull off a 10.8x beating the hell out of the car....which is what you have to do for 10 second runs. I knew ErnieT ran 10.7x @ 128 so I figured I should be able to muster a high 10.8x @ 127 if I drive it ErnieT style haha.

All I need now is some stick and a nice strong rear end.

I think I'm going to start a new thread about rear ends.

Thanks for all the info man!!!!
STEPHEN

 

B'Ham is about 1 hr 45 mins from me. Steele, not sure. But willing to drive if I can get off in time to make the drive.

Tim

 

Steele is a fffast track! Just be careful there, not much safety stuff. Its about 2 hours from ATL.

 

Steele is pretty far up 59 from Birmingham, you may want to look on Mapquest or something and see how long it would take to get to Gadsden. Its pretty close to Steele.

 

I'm very glad to see Stephen's car laying it down like we all thought (read: hoped) it would.

Seriously, Stephen and Bryan have worked very hard to get this thing where it is and along with Steve, deserve a lot of credit. It's very hard to pioneer something in an industry that has cash-a-plenty companies like RE and the like running around. Really great to see a couple of "good ole boys" get it done. Bravo. I just wish I was still there to have seen it myself.

Almost makes me wish I kept my BNR's. Almost.

 

Hi Steve,

I can confirm the type rz has strengthened ltd slip diff, whereas the others have standard. It would defintely be a better option compared to most of the aftermarket stuff forsale. If you ask someone from the Japan forum of Jason from jt-imports, or Inukai I am sure they can confirm this for you aswell. I know from 96 onwards both the type rs and rz has strengthened diffs at 4.3 ratio.

rgds

Brian Ellis

 

I just did the calculation from my 2400' elevation to your elevation and it sucks! Your .4 faster down there I guess it's good for you though

I need to start doing the calculations to my times. So my Mustang ran a 12.85 here......that's a 12.42 at or close to sea level. I like those alot bettter!

So all i have to do is run a low 10 here and i'm a 9 sec. car at sea level

 

Yea, I dont really think there is such thing as a "fast track" there are only "slow tracks" cause they are at high elevations. The track in Montgomery is faster than Steele, I think its right at sea level.

Everyone local bitches about thier et's and mph's at Steele. The track in Mont is a NHRA track.

Marshall? What kind of safty stuff you refering to? They have a ambulance there.

STEPHEN

 

Damn I have to go to Montgomery. Steele is a good 2-3 mph faster than Silver Dollar and Silver Dollar is a good 2-3 mph faster than Atlanta Dragway.

 

Hmm, maybe its due to other things. There isnt any reason a track should be that much faster unless its at a MUCH higher elevation.

People always talk about being faster in Mont when they are at Steele, I personally have never noticed it. I just figured they were making excuses for thier poor time....which really is still what I think lol

You sure people cars arnt just running better cause of different weather, ect? I mean having a 6mph differance from one track to another would be like comparing one of the highest tracks in the country to one of the lowest (elevation wise). 6mph is huge!!!

All the calculators that I've used after entering in the info on my car were REALLY close to what I actually did so I'd say that Steele is a pretty good track.

Maybe those tracks you go to are at REAL high elevations??? I dont know

STEPHEN

 

Whether its right or not, its been a pretty consistant rule of thumb for the georgia F-body/vette clubs. Consistant 108 GA cars would become 111-112 cars at Steele the next weekend and so on. There was a huge discussion on our list that got pretty ugly IE "Did you run Steele times or real times?" ..stuff like that. Personally I think tracks are no better than dynos when comparing 2 cars on the internet because, as you said, there are still way too many variables (track grade, trap methods (average or end), atmospheric conditions, ect) that vary from track to track and day to day. Either way, I know your car will do well at any track.