Okso here goes.Im sure you guys have seen this before but i havent so heres the question I pose to everyone.
I have an auto 93 rx 7 touring.It seems fairly quick.Off the line it takes a couple of seconds to build boost but then its pretty swift.So what I wanna know is how much slower is it than a stick? And is there a horsepower difference between the stick and auto version of the same car.I mean if its a huge difference in performance then im probably going to try to swap it to a stick.But who the hell has 4 grand to burn right now.I certainly dont.Or would my accelaration be increased beter if say i had a 400 rwhp auto ? I dont know i guess the fact that bothers me the most is that just about any freakin car off the line out accelartes me for the first couple of seconds untill my boost comes online.It sux getting beat by a freakin station wagon.Jesus christ its an rx 7.From a rolling start its fast and ive beaten many cars but off the line its freakin pathetic.
Heres a good one.Has anyone raced a stick rx 7 versus a auto rx 7? And if so how much faster was the stick.Car lengths? A few feet? Whatever.
Im looking at maybe an exhaust to bring up the torque figures.Are there any other simple mods that increase torque?
Current mods...
-Blitz dual air intake
-Blitz b.o.v
-Silicone vacuum hose job.

 

Umm... sell your BOV and buy something useful if you're running out of money.

Try a downpipe, a catback, a PFC, and then a midpipe....

 

The reason i said a catback was because its about the only other mod that i can make without getting into trouble with my engine.Any other mods like a dp or midpipe would greatly increase boost and without the fuel to back up the air i can kiss my engine goodbye.
Thanx for the suggestion but i think ill keep the bov.
Right now what i wanna know is if a auto to stick conversion is worth the money and if its a huge difference.
If not then ill probably just modd the car to some impressive hp figures and and see if i can keep up with the stick cars.Being the underdog is sometimes fun.
Raced one guy with a newer talon tsi.He said he was boosting 18 psi.From a rool at like 35mph we booth downshifted and his was a stick.I won.It was the greatest feeling especially since we did this 3 times.I won each time.Then we pulled over and bullshitted some.Thats when i found out how much boost he was running.And thats when his jaw dropped when i told him my car is an automatic.Like I said being the underdog is fun sometimes.

 

The fd AUTO has decently spaced ratios for 1st, 2nd and 3rd, The rear end gear is TOO TALL (3.90 vs 4.10 for 5spd) for good launches and the way tall 0.694:1 od 4th (vs 0.719:1 5th) kills top speed accell BUT from 25mph (4krpm 1st) to 125 (redline 3rd) the auto will pull real strong! If you want a REALLY QUICK auto - change to a 4.30 rear gear. Even w/ the 4.30 an auto could run to 170+ at redline in 4th (vs 205 w the 3.90) if you have enough power.

 

wow i thought the 4.3 gear swap was only possible on a stick.Interesting info.So the 4.3 increases top end power than? I doubt ill ever see speed of 170mphs.Im not that ****** crazy.Especially on the street.
What im looking for more preciselly is low end to mid range ,power ,speed ,torque.I think it bothers me because last night I was at a stoplight and a guy with an audi of some sort pulled up next to me.It was a stick.He didnt nod or anything but when it turned green he went and well i tried to go.But damn it felt like i was barelly moving.Since then ive been seriously considering switching to a stick.But only if it actually helps with the low end.If its a minimal change screw that idea.

 

hmm no one else with any thoughts on this?Ohh well ill be waiting for some interesting answers

 

Ok well Im just bumping.I wanna hear some more info on this.Thanx everyone

 

i know this is been discuss many times, but its better to use 1st by pressing the Hold button and put it on L.

Do not go WOT. What you have to do is depress the pedal halfway and slowly depress the pedal till WOT... or like some people advice would be brake torquing... (but not good for your tranny). Try searching!

What i would do is get a manual/electronic boost controler so that you limit it to 10psi. Then upgrade to a dp & cb.

Eventho u buy performance parts, the auto tranny cant handle the power, as being an SUV tranny.

Gd luck

 

My next question is this.
Who here has actually done a auto to manuall swap and how much difference has it made for you?

 

Well, I am always one of the regulars to hop on the 'automatics are NOT the demon some think' bandwagon, so here goes.
Now maybe, just maybe I have a particularly quick production model, it does happen from time to time, but I think my car is like any automatic equipped FD that has been kept in tip top shape.
The thing is fast, damned fast, and other than that all too true "bog" off the line (which can be almost entirely eliminated with proper technique, by the way) I'd put it up against almost anything. With a slight rolling start the car just lights up the tires, shoves your *** way back in the seat, and takes off hell bent for glory, and the thrust doesn't really start to fall off until after 135 - 140 mph.
You get there REAL fast!
As I've said in almost countless threads, the auto FD is no dog, far from it. And I really think those that bash them mercilessly have never been in one. There are a few members here that have owned both manual and auto versions, seek them out for real world comparisons, use the search function.

 

I too have a auto. iam wondering where you could get a 4.30 rear gear.???

 

The 4.3 will give 10% increase in Torque at the Rear wheels vs the 3.90

 

wow thats a pretty big increase in torque.Especially with other mods on.Would i have to have a shop do the 4.30 gear swap?
Dont get me wrong guys i love my car.I just want it to be faster.So I was wondering if the stick is such a dog of the line or if both cars lack the low end power needed for quick launches.
Also who here has an auto all supped up?
I mean who has a lot of mods and what is your hp rating.Just wondering how much hp the stock tranny can take. if the stock auto tranny cant take much hp then im going to have to change it to a manual.Thanx everyone for your input.

 

As for where to find the 4.30 gears.Hmm i know ive seen them on one of the online rx 7 stores.A little searching will probably yield some results.If i find out where ill post it for ya.

 

one technique ive learned thanx to a older more experienced driver who happens to own a really supped up old corrola 5 speed. Start in 1st up untill about 4 grand.Shift into 2nd which really launches the car and rev it untill about 5500 then redline 3rd.Under the right conditions and with the right timing it flew.Although it took the car a few seconds to start things up off the line.

 

auto 1/4-low 14's....stick 1/4 mid 13s

 

first, ill let you know that i have auto, and i know what your talking about with the snail's pace start from a stop. there is a technique i learned from reading a post on here left by jonski (i think) this has worked really well for me
here are the instructions:
1. put the shifter in L and press hold
2. brake tourque to about 2500rpm, just before your tires start to spin (you dont want them to spin)
3. when light turns green, let off brake and hold the gas pedal still until 300rpm or so, when the boost is built up, then mash it to the floor, and release the hold button when you get to 6500rpm, you will go a little over the 7000rpm red but its ok
ive found this to be the best way to lauch, but im still am not happy, just because i love to change gears. i bought the auto b/c it was a good deal. im currently picking out all the parts i will need for the 5speed conversion. hopefull it will be ready in mid dec. ive read several threads where people have done the swaps. everyone that has done it has loved it. but some did it and did not change the gears to 4.1 and left the 3.9 on, but later changed it. that also will make a diffrence ive heard.
if you just want to change the gear ratio, and keep the auto for now, that should help. i dont know much about the 4.3, but im sure it will make lots more tourque than the 3.9.
ill update you when my project is finished.
ive been typeing for a while now, so i may have repeted myself on several thing but oh well. if you have anymore questions plz ask. (this forum kicks ***, its taught me more about rx7's in the last 6months than my last 2years of college has) there are some really smart people on here. thanks you guys!

 

Ok call me dumb but what the heck is brake torqueing?
Do you mean stomp on the brake and rev it up to build up boost? Ive tried that but if i go past 1500 rpm my brakes loose grip and the car moves forward.I even tried it with the e brake and regular brake toghether and still the car started to move forward past 1500 rpm.
So either i need new brakes or im doing it wrong.

 

If your brakes can't STALL the engine (at 2.5-3k rpm the tq converter should stall the engine if you have the brakes on full) then you have a BRAKE problem - Fully flush and blead the system and check your pads. Even if the pads are not worn out they may be "Glazed" and not producing enough friction. If they still have plenty of friction material on them "De-Glaze" them by sanding the face that contacts the rotor w/ 80 or 100 grit sandpaper, use a sanding block to keep the pad surface flat & parallel to the backing plate.
Also if you can rev PAST 3k w/ the brakes locked & trans in gear your torque conv or Trans is bad.

 

This is a simpel solution to the slugish take off from a dead stop. TRY A 3000 RPM STALL CONVERTER. Come on it that simpel. The next question is where can I get one? Any good tranny shop can build you one for around 300-500$. Its that simpel. It wakes the car up fast. By the time the converter starts dilevering power you already have boost. Just becareful becuse the tires will break loose real easy.