choopacabra530

iTrader: (1)

"If im at a stop and drop the clutch at 2500 or 3000 grand i dont have any traction through first and pretty much second"

Be carefull, you could throw an apex seal out of your falopian tube launching at 2500rpm, might want to go 3mm to handle that abuse.

7SpringsMisfit

this thread gives me the jollies

aussiesmg

iTrader: (1)

Actually I'm thinking the new engine may be ported, if so with a new exhaust it would really come alive and could be capable of very respectable launches. When you power through the gears when does the power come on in the RPM range and when does it fall off. My BP 13b came alive at 5000 RPM and pulled like a turbo to 8500 which was my choice of rev limit, if his comes alive at 3K it indicates a Street Port of some kind IMHO.

What carb are you running, pics please.

RXnos1200

iTrader: (24)

once my 7 is breaking the tires loose in 1st gear and then shifting into 2nd gear without the tires hooking up first; I will be spinning through all of second gear till almost redline. Pretty easy to do IMO. I'll spin part of 3rd gear but then I start to finally hook up. Never chirped 4 th gear though. Depends on the driver. hooking up and launching is obviously something that needs to be practiced. Be safe and have fun.

ckm110789

My tires had a big factor to do with how much i was spinning. Like i said i cant chirp 4th anymore and it takes a lot of effort to chirp 3rd. But ill try to get a vid of me driving it and 3500 and shifting it into second and the tire chirping. And no thats not clutch kicking it. I dont do many launches from a stop. Its maybe like 1nce every 2 weeks i might do if i feel up to it. I norm just get it up to speed and then back off.

Im running the stock carb right now. I got another one on its way to my front door now.

As for my engine bieng ported. I highly doubt. It started pulling really hard i think 4grand or so. I dont remember cars running like crap right now b/c my carb keeps messing up and now i got an exhaust leak


Yall just have to take into consideration on how the car was treated its whole life and all the works that has been done to it. Plus the climate in which the person lives in. B/c if its a hot muggy day out my car runs like crap will barely chirp 2nd bad. But on a nice cool day i could do it nooo problem at all. Like i said my motor has a lil over 30,000 miles on it and its been babied its whole life. Ive got every recipet for the car even the original window sticker. This car wasnt driven everyday it was only a sunday car so its got granny miles on it

the spindoctor

iTrader: (1)

congratulations, you "beat" 2 of the slowest v8 sportscars ever made. go to the dragstrip and see what it does, until then nobody is really gonna take you seriously. even if you suck at launching, your trap speed will still be an indication of how much horsepower you're making.

yetterben

yeah 80's corvette if it was lucky and i mean lucky got the cross fire 305. That only put down like 220 hp fly wheell mid you. I had one in a 84 transam and it was nothing to brag about. Fox body stangs on the other stock.....can do nothing impressive. However there are a few 9-10sec fox's around here on the street but these guys are old fashion gearheads who know whats up. Not some i just watched f@f and wanna play guys.

Black88inmd

I'm a bit confused with just how much you're spinning tires. My car is just an open diff with the sumitomos that came with the car. And even when I have the pressure up fairly high to keep the sidewall flex down for sliding there is no way in hell I can chirp, et alone spin in second. Unless I'm about to enter a turn, throw the weight of th car around and hit the secondaries. I'm not running all that well (rich with a few exhaust leaks) but the little car did take a cavalier putting down 133 at the wheels on the top end (100mph+ pass) But even still, it's a pig on the bottom and will just hook.

ckm110789

guys why dont yall actually read what im posting. When i drop the clutch most of the time its just to have fun and have the back end slide out. I can get it to hook and go if i want.

Also i said my tires were ****. I got them replaced and i dont spin as much.

I CANT CHIRP 4TH ANYMORE. ITS HARD REALLY HARD TO CHIRP 3RD.

MY ENGINE IS BRAND NEW!!!

and im so sorry u cant chirp second

1986 corvette runs a 14.4 in the 1/4mile
1984 mustang runs a 14.9 in the 1/4mile.

Yall have no room to talk since u cant even chirp the tires

rxtasy3

iTrader: (2)

first off let me say if u have a 7 with that low mileage on the original engine, congrats on the find. rarely will u find one now a days still on the original engine much less with low miles. i'd be for finding out more info on ur engine to see if it is in deed stock or was rebuilt with some porting by the original owner. in my experience, tire spin is fairly easy depending on how soft or hard the tread compound is. my 7 has no lsd. the engine is from my 808. i built it a few yrs back, has streetport, holley 600 and exhaust from RB. the tires currently on it r 205 60 13 turbo-tech gt radials. as a DD, i chose tires that have a fairly high tread life so these will have a harder compound than say yokohama's(sp) or sumitomo's(sp) with much softer compound for handling. with this engine and the stock f/w and a decent clutch, a speed shift into 2nd would just squall the tires and a good chirp in 3rd. changing to a light f/w made a world of difference. can't get the tire spin going to 2nd like i used to. now damp roads is a different story. i can be rolling in 1st at 3k and just crack the secondaries and light 'em up. even in 2nd, once i break open the secondaries it's spin city. i had a ball in my 808 after i put an lsd 3rd member in it. i'd come out from the hot spot after getting gas. the roads would be dry but they'd be alittle puddle of water in the parking lot just at the edge of the road. i'd roll thru it and just blip the throttle and get sideways. so yes, i do understand how he gets so much tire spin.

btw, u being in GA u'll have to come to the meet on 12/8. just check the SE RX7 Forum section. it's up to 13 pages now but this link is the last page with the location:
https://www.rx7club.com/se-rx-7-forum-35/old-guys-12as-club-meeting-675955/page13/

edit: https://www.rx7club.com/showthread.php?t=649402 is this the car we're talking about? if so was it rebuilt during ur ownership? is it possible that it IS ported?

IanS

iTrader: (4)

I know how to make an FB with a stockport 12A and RB exhaust with stock nikki and power pulse intake chirp damn hard in 3rd gear - Its easy, just remove your rear springs and let the rear end sit on the bump stops. I could be doing 25 in 3rd, drop it into second and just about lose control.

This was a parts car btw that had cut springs that sagged and broke and were basically not there anymore. With the suspension gone, the car wont squat and the tires would just spin.

the spindoctor

iTrader: (1)

i'll paypal you $100 if you show me a vid of your car as is running a mid 14 second quarter mile pass. i'm serious. not trying to be an ***, but if you come on here saying you outran some mighty v8's, then you need to have something to back it up or people are gonna call bs. be realistic here, you're in a 2500lb car that makes at most 130hp. do the math.

ckm110789

lol if i car ran 14's i would have been somewhat happy. Right now as i run i would do about a mid 15. But i think my secondaries are stuck b/c ive seem to lost all top end. Imma open them up. But they run 14's from a stop where their torque gets them b/c they may only have low 200hp but they got 300 something foot pounds of torque. So it was like racing something that weights 3000 pounds with 200hp.

As for me meet. I might go up their i gotta see. I orderd a new carb that the shack built and i gotta put it on sometime that week.

RXKarma

im sorry...maybe because I am not from georgia or something....but i cannot make any sense of the above post...

85 FB

That's because you're from MD, and everyone knows how bad the school system up there sucks. j/k

Reddah

Hey there didn't happen to be watery droplets fallin from the sky, and possibly covering the ground in said watery droplets, making the ground "wet" and making your tires easier to spin... just a thought!

ckm110789

nope clear day on bald tires.

DRFTMSTR

iTrader: (1)

i belive him.. i know him personally the car was spining tires like a ****. His car is pretty damn fast im trying to get him to race my buddy with a sr20 240sx with a full turbo back and 13psi. I'll be recording that...

SSRx7

Dude, my stock 350 sbc in my Astro van out ran my stock 12A in my FB.

Astrovan=4000lbs. 350= 190hp (TBI fuel injected stock pickup engine)
RX7= 2300lbs 12A= 100 hp (stock 4bbl carb.)

I just can't see you playing a 5.0 mustang like that. I think that if that mustang wanted to he would have left you spitting dust out of your mouth.
Not trying to be an A$$, but I just don't see it.

And yes, I can chirp my tires when shifting into 2nd. And yes they are relatively brand new tires-less than 1000 miles on them.

Interestingly enough, my crew cab 7000lb Silverado with the 6.0 left my Astro in the dust.

Later,
Bill

3rd and final 7

iTrader: (9)

if he had a 84 85 GSLSE with exhaust, intake and TB mod and a low milage motor i can see him holding own with a 02 mustang GT vert (i did this but did not win) other than that your going to need a turbo and or port other wise BS.

85 FB

I don't believe DRFTMSTR. Recent join date and only ONE post. Hmmm.......

Anthrax Mike

Your mileage has nothing to do with this. My car had 20,000 miles on its 12a when I bought it four years ago, the car still had two of the orignial tires on it. Before I replaced them, if I hit even a tiny puddle I would hydroplane slightly, but I could never, never, never, never come close to doing what you claimed to. Yes my car was completely stock, but if that much power came from those modifications you listed, I think there would be more people seeking to do less to their cars. There is a reason everyone wants a T2, or even 13b for that matter, porting ect. Either you don't know the history of your car as well as you think, or your tires were down to their cords. Were you by chance seeing sparks instead of smoke?

DRFTMSTR

iTrader: (1)

fine dont belive me doesnt hurt my feeling..i will still sleep at night. i dont post b/c i read more than anything. i actually use the search button and as for the recent join date..i just recently got a rx7.

85 FB

I love it when people say "they'll still sleep at night". Like it really means something to us.

SSRx7

Dude, we are not trying to hurt your feelings. And by no means do we want to turn a fellow enthusiast away. It is just that your 1st post jumps right into a discussion and you don't introduce yourself and no body knows anything about you. You may indeed believe him, but you don't give any reasons why, how long you know him or about him, etc. My first impression when I read your first post was that "He" logged on with another name to support his story. I may be wrong about that, but that is how your post came across to me. Go back and read this thread through, and when you get to your post, you will see what I mean.

Protocol is that you at least introduce yourself before you try to start swaying opinion of those who have been here for a while...

That being said, Welcome to the Forum, check out the notices that are pinned at the top of each section and have fun with your car and here on the boards.

Later,
Bill