Like the title says i took my 91 FC to the track to get some runs in to see what it will do before i begin a turbo swap. I was expecting high 14's at the least but my best time was a 17.24 at 77.35 MPH.



Here is the best one



R/T .694

60' 2.338

330' 6.974

1/8 10.803

MPH 63.67

1000' 14.303

1/4 17.24

MPH 77.35



So i know the reaction time could be better but it was my first time actually driving at atco. I know for a fact that the 5th and 6th ports are frozen shut. The engine could use a cleaning but was refreshend at 80K. The LSD worked well when heating the tires up which was the only good thing of the night. I guess it is time to get to work and get her working better.

A brand new 2005 Ford Mustang GT with the 4.6-liter V8 makes the trip in 13.5 seconds, with a professional driver behind the wheel. I'm not sure your "mid-14's" estimate was a reasonable expectation for a 15-year old n/a RX-7 with the auxilliary ports frozen shut. My T2 in near stock configuration ran low 16's.



I think a lot of people would be surprised to see how "slow" their cars are if they actually ran them at the strip.

or dyno them....



i think stock t2's ran high 14's off the showroom floor, i think a good healthy na should run mid to low 16's?

I think car and driver said the n/a's would run 14.7 from the show room. The engine was rebult at 80k so i was expecting a little more than that.

holy crap my dog can run faster then that. My miata ran faster wtf?



I was runing a 8.6 1/8th and 12.9 1/4th in one of my FCs with 7.5in street radials stock turbo 11psi in 3rd gear 8psi in 1 and 2, a 2.5in dp to 2in catback no cat 2in mufflers and a TID with FMIC.

i dont think it's that rediculous for a bone stock older na rx7

That definitely sounds like a turbo number. Mid 16's is right for stock n/a.

ok so it sounds good for a N/A? It was hoping for more but i guess it is fine. I can't wait to do my swap now. I am hoping for low 13's after an exhaust and a FMIC and some tweeking of the computer.

i put the weight of the car into a 1/4 mile calculator, looks like you're putting 110ish hp to the ground, which is about right for not having 6 ports that work

I am going to attempt to get them to work with some WD40. I cleaned out the motor with sea foam. That worked well but i still think it is clogged with crap. I am going to try the water method next. Any suggestions?

my best time with my 89 gxl na with only a hks exhaust and header ran a 15.9 @ 98 and ya wheel spin to 60 foot but now im turbo and expect nothing less the low 11 high 10s now that the cosmo motor is finish with the new turbo and studded block.





randy



ps pics to come

I was always under the assumption that owners of NA RX7s knew they were slow.https://www.nopistons.com/forums/pub...1047683785.gif

its not hard to figure it out.... fun? yes! fast? not really

It feels fast compaired to my last car (1999 ford explorer sport) I guess it just feels that way becasue i am close to the ground.

Your 60 foot is terrible. Thats your main factor in your ET. However trap speed shows that car just lacks power..

Yea, but even if he cuts it down to a 2.1 60', he is looking at about a 16.8 flat give or take a tenth. Do you have anything done to it? I had an intake filter, and full exhaust header back, and ran a 15.1XX at 90.25 mph. With mods you could get into a high 14.

????

your reaction time is aweful, work on your reflexes before makeing your car faster

my vert ran 16.7 and all it has is air filter



1.99 60' you shift at about 75ft with a 3.90 rear



rt's where .398-450

His problem is the aux ports... get that 6PI stuff working and you'll drop a second off that time.



My car with full exhaust (header, presilencer, x2 fartcan mufflers) and frozen aux ports dynoed 115.



And no, I don't still have fart cannons on the car :P

Worn out suspension can make your car react slowly (Affecting your reaction time) and your 60ft times

My suspension is all original. I do not think it was ever changed. The reaction time could be lower but the clutch was slipping and the car is BONE stock. My LSD is gone but likes to grip when it wants to. Like i said above i know the reaction times could be better but that was my FIRST time actually drag racing.

Screw struts and clutches he just needs more experience behind the wheel.

I need more time at the drag strip. I am rather good on the track with past experence in shifter cart racing along with back road high speed driving.

Im sorry but you are full of ****, my bosses turbo 5.0 runs a 8.0, and he has been drag racing for years, and those times were on drag radials.

He said the 8.6 was the 1/8th, not the 1/4.



If its a turbo 5.0 running 8.0 in the 1/8th, that car sucks.

Please explain, how is 8.0 slow for a street car still stock weight, I just dont see it runing a 8.?

My frozen-6PI 1990 N/A GXL with rear seats and tons of crap in the car ran a 11.4 in the 1/8th mile. 8.6 with a mildly modded turbo is not much of a stretch.



There are plenty of 11 and under second Mustangs and Camaros around here, with stock or close-to stock weight. A turbo'd 5.0 should be a beast.



Again, if its an 8.0 second 1/4 mile car, I can't say anything bad. But 8.0 in the 1/8th is just sad for a boosted 5.0.



Seriously, a stock Jeep Grand Cherokee will run 10.6 in the 1/8th. I hope the mustang would be a shitload faster than that.

because its an 1/8 mile not a 1/4... https://www.nopistons.com/forums/pub...1047683664.gif

Okay let me rephrase that, the car is stock block stock heads, just a small cam, turbo and water/meth injection. 8.0 index still shifting the car is badass.

Thats why your 60ft sucked so much too, street tires dont need heat cycling, they just get oily when you do that.

kelly chargers which is the brand of tire i have (they came on the car) grip ALOT better when hot. I have proven this many of times. It may be different with about a inch of rubber on the track but when on the street they grip a hell of a lot better when hot.

https://www.nopistons.com/forums/pub...#>/BURNOUT.gif

ok finally got some honest times at the track.

Stock motor, unfinished air intake, car weighing just about 3000 lbs (had 2nd seat in, cage, full tank, some tools and crap) Street tires, stock pressure plate, 4 puck disc w/ springs, and a Clutch pedal to close to the floor for fast shifts. Enough whining, just trying to give you all a baseline to compare. https://www.nopistons.com/forums/pub...R#>/violin.gif



Best time was a 16.217, just under 85 mph. I think the car could get into low 15's with race tires, cold air intake box finished, and less weight, (what do you mean less beer?) . A more experienced dragstrip driver with the pedal adjusted properly might see 14's, but I think the planets would need to be in alignment or something.



Said I'd own up on what mine can do, best of luck to the rest of the NA folks!

Neil

i was at the track last weekend with my 87 gxl this is what i ran with the 6port not working

reaction.427

60ft 2.347

330ft 6.907

mph1 64.71

660 10.677

990 13.939

mph2 82.60

16.679

lol i wouldnt even bother brining my n/a to the track, id be embarassed.



id roll out the t2 for the strip.



kevin.

I finally got a new clutch. I took it to the strip and got her down to 16.4 with frozen 5th and 6th ports. I changed all the fluid in the tranny along with the rear and made sure the gears in the rear were in spec. Much better than before but i am slowly peacing together a turbo motor so the 14's will be possible in the near fuiture.

are u sure u have a LSD?? no 91 NA's had lsd stock ...... those 60fts seem like 1 tire fire ones too me ( at least thats what i was getting with an open diff)





in comparison my old 87 base model bone stock with messed up ports ran a 17.3 as well haha

I was just curious to know, and the Hondas I was against left more embarrassed since my non turbo and the ol man beat them by usually a second! https://www.nopistons.com/forums/pub...1047683329.gif

It was a tuning test, my ports are stuck wide open, too, so bottom end gives up some.. Was a fun get together for local RX7 club

I dont feel so bad about my beater NA GX now, header and gen 1 safc with catback netted me a 16.38/89 best... Only 198,000 kms on original motor..... https://www.nopistons.com/forums/pub...DIR#>/wink.png



P-port na is ready to go in now with TII transmission.. Then will run at track again..

It spins both tires when burning out and i was in there the other day and i see an LSD.

N/A's are SLOW in a straight line. Sorry, that's just the way it is... especially stock and unported.

Yup I kept daring the folks to do a full lap with me... Braking, turning and Momentum out of the corner is where we can win. Oh yeah.. did I mention reliability? https://www.nopistons.com/forums/pub...R#>/tongue.png No greedy boost and or nitrous and other computer silliness. (ok not yet) so motor should live a long time.