Syrin

im seriously curious about this, im in a streetracing team (just joined em) and i wanna know if its really that safe to go past the redline in an 87 rx-7, also could i beat non-turbo eclipses?

RETed

Sure, the computer is going to rev limit you anyways...


Sure.



-Ted

Syrin

alright, what happens when the computer rev limits me?

also could i beat integras? even if they have intake, exaust and headers?

and i have an intake at the moment...

RETed

It'll feel like you hit a brick wall, and the car will buck like a wild bronco.


This is not a turbo FC, right?&nbsp I doubt you could touch a VTEC Integra...



-Ted

Erik

if you are stock, yeah then an integra will beat you...

i had the opportunity to race a GSR with at least intake/exhaust (maybe header too, dunno)...we ran from a roll of like 5 mph till 65 or so...he had me by about 3 feet ......this was in my n/a with mods...

Syrin

yea..no turbo

is it possible to get a turbo for my car from an old turbo rx in the junk yard ya think?

Yelow RX-7

yeah, raced a 92 integra gs i think, or was it an ls?? i dont remember, but we raced 2 times. both times from a stop. he beat me by like a foot, really a foot, and then the second timei beat him by like 1.5 cars. raced a prelude with the triangle lights in the back, and it had a vtec and it beat me by 1.5 or 2 cars.

Yelow RX-7

oh and if you go past the redline, dont you take the chance of blowing your apex seals??

supergoat

My peak horsepower is made past redline so I take it past quite frequently. It's not going to harm your engine as long as you don't go to 8000+rpm. The CPU wasn't programed for it. I usually just go to about 7500RPM

mazdaspeed7

If you have enough mods to go past redline, it wont hurt anything to go above redline, as long as you dont do it for long periods of time, etc. But with your engine(only intake) youre wasting your time going above redline.

RarestRX

Yo,


I thought going past 8400rpm caused the pinion rings to go wonky in the rotors? Something about needing them pinned or something? Don't get me wrong, I've revved past 8400, but never to fuel cut...


KS
1989 GTUs "They're honking at us!"

Dyre

Well, things do start to go wrong at aroun 8,500rpms, if you keep it there for long periods of time. An occasional over-rev is'nt going to blow the motor up, but its still not a good idea.

C. Ludwig

iTrader: (27)

I've got a very pretty, very clean, very new pile of crap sitting in my engine bay right now because the redline did matter. Not exactly the redline but the 8500 or so RPM limit the guys are mentioning. Don't do it. Mine pulled hard to 8000. Fell off after that and died quickly at around 8500. I definelty lost an apex or side seal and the rotor is clanking around so I'm assuming some gears too. Don't do it guys.

Chris

mazdaspeed7

Series 4, I assume? my S5 never has problems with 8500 rpm.

The limit on the stock bearings is 8500 rpm. Most everything else is safe to 10500 *if* balanced properly. Series 4 motors had more restrictive intakes, which makes the engine struggle more at high rpm than the series 5 motors, which makes the engine less stable, and more likely to mess things up. Basically, if you have the mods to make power above redline sticking to within 500-750 rpm above redline for short periods of time wont kill your motor.

ItsNiceToBurnRice

in my 88 NA Ill pull up to 7500 to 8000 very often in 1st and second gear, first is just so damn short-but Ill never go over 8000, unless its on accident when doin a donut, the redline dosent necessarily mean your harming the engine in this case, just that the stock 7 dosent make anymore power past it. AM I RIGHT PEOPLE?

mothership

iTrader: (1)

max torque is usually before you hit the redline, then I believe it drops off. shifting to the next gear will give you more available torque.

however it doesn't hurt to hear the buzzzzzer every once in a while

ccvwspeed

Ok I am the proud owner of an 86NA and I have yet to race any integras (which are slightly overrated) but I have raced a TURBO eclipse (gs-t) and i think the results were interesting. First off I have a cold air intake as well as a race pipe and thanks to the help of this forum a nicely tuned motor with an electric fan and no AC belt. I have major problems with traction, but it was a dry night and we went at it several times. The eclipse would pull much harder off the line and up to about 60mph were it would have about a half car length on me but when I would shift out of third at 105mph I had already passed him and put 4or 5 car lengths on him before he hit his fuel cutoff at 125. I love it, but he is a friend of mine and eats stock ls and gs integras for lunch. A type R is a serious car especially in the hands of someone who knows what they are doing. I think that with some better tires and a street port motor I will be suprising some more people. Happy racing buddy.

C. Ludwig

iTrader: (27)

Nope, series 5. There's nothing about the intakes that make the motor more or less stable as it spins up. It's either breathing and can rev or it's not. The rotors gears can walk in either motor starting at around 8500. And the main bearings aren't designed for that kind of RPM either, that's why the comp 3-window bearing is must for a race motor that is revved anywhere near 8500. Rotor clearance is another issue as well as the oil system. Engine damage most often happens in the blink of an eye (in any motor), so saying just for a little while is bad advice. Also, if you're going to rev it any higher, get yourself a scatter shield and driveshaft hoop too. Ever seen a clutch let loose and blow through the side of the car? Not pretty.

Chris

tesla042

geez... What engine speed is that? If i recall, I'm at 7k at ~85 or 90 or so...

you have the 4.11 gears, right?

-Tesla

mazdaspeed7

I shift out of third at 107-108, thats at 8500 rpm though.