SCCAIT7

Hello- I have an 88 convertable and yesterday I missed a shift and rev-ed the engine to 7,500... Have I done any damage- do I need to check anything?

Oil pressure is still up around 80-110.

just for my inner curiosity...what will that engine turn?

SwiftTone

I think 7500 will be alright.

Check the compression on the motor is what I would do.

jgrewe

iTrader: (1)

With stock internals you could spin 9-9500 rpm. It won't be worth it with everything on the outside of the engine stock and stock ports.

coldfire

iTrader: (1)

7500 is fine.

i am using an S4 core with an S5 (manifold, ECU, etc.)

i rev to 8k a few times a week, no problems so far.

i think the weak points for reving too high is possibly the side seal clearance, e-shaft, and your main drivetrain assembly (flywheel, etc.)

inflatablepets

I do the same. I have the same set-up as yours and mine pulls really well up to 7800

ilostmypants

I tried to down shift to 4th going about 75mph and accidentally went to 2nd one time....I dont know how this happened or why but my RPM's were off the charts lol. Anyone else ever done this?

jono20

did your tires lock up in the back?

ilostmypants

nope...not that i recall

ilostmypants

why?

vhold

Yeah 7500rpm will not hurt a rotary - spin it up to 10k, maybe you'll break something.
No fragile valves or the like in there.

My dad raced a first gen once at the Mid-Ohio 24hr race, he asked the crew chief what the redline is, he said "don't worry about that, you can't over-rev it, just shift when you feel the power slacking off."

88t2romad

because in second gear the rev limiter kicks in at about 70 mph. And your tires wouldn't have "locked up" forsay....but they would have been spinning slower than the car was moving. Causing them to screech for a second.

-ben

RX7Dragon

My S5 regularly sees 8k with no probs.

Rx7Ridah

iTrader: (8)

yeah, i did similar, 90mph misshift to 2 instead of 4. i huge fireball and a tach that went all the way around to zero, tires screeched but instantly was shifted into proper gear. cracked the apex seal. but that was on a s4 turbo. all seemed fine for like another 20-30 miles then the seal made its way out.

Stanello

iTrader: (1)

Ya, 7500 should be fine. I've accidently reved mine to the high beam indicator.

Snrub

iTrader: (1)

A periodic minor over-rev won't matter.

Intentionally reving above redline is not a good idea. There's a reason that the redline exists. The MOP isn't designed to provide proper lubrication above redline. I've roasted an engine in part due to overreving so take my word on it.

lastphaseofthis

iTrader: (8)

so for all the premix are safer in that espect also? another advantage for them..

ilostmypants

yep, I run premix

Camrann

I can ride 2nd till 80 muhahahah

Stanello

iTrader: (1)

why?

drft_180sx

probbly inproper tire size?

GUZZLR

yeah i once over revved mine to like 9000RPM hehehe
but have intentionally revved it to 7.5 -8 K a=many times...

so yeaah it dont really matter ... LOL

Ronald E. Jacques

Redline on some NA's is 8000 anyway. Your fine.

Snrub

iTrader: (1)

Well if you want my opinion on the matter, then yes I can see that it might make sense for a track car to run only premix, but there's nothing wrong with the MOP for normal operating conditions. Saying that premix is a benifit because then it better enables you to run your car up to 9k for no reason isn't a valid arguement. I really doubt that a infrequent quick and minor overrev is going to make any difference with respect to the MOP's capabilities.

Houstonderk

iTrader: (3)

A 8k rev a day keeps the carbon at bay. lol

SwiftTone

The rev-limiter wouldnt have came in, or even mattered if you miss-shifted into a too low of a gear. Because it is gearing related, not fuel related. The rev limiter works by cutting fuel.