Billman250

CORRECT.

If you are driving an AP2 that revs to 8k, you are fine on a one gear over-rev. DO NOT go to a shop for any inspection, you dont need it. Fact.

Lots of bad recommendations in this thread.

blasphemy101

This is what I was referring to in my post above.

hunginator

Well, I haven't got any type of inspections done and I'm driving an AP2. I've been driving it around carefully recently just to see if I notice anything "different". Everything seems good so I think I'll go with some of your recommendations of not having it inspected since apparently, the AP2 can handle a little bit more abuse than the AP1 drive train.

jguthrie

Sorry for restating the probably obvious, but for clarification, "one gear over-rev" is accidentally downshifting 1 gear instead of up shifting. Shifting 4 to 3 instead of 4 to 5 for example, correct? I know this is a general guideline and all, but would this still be the case if going to redline and then accidentally "down"shifting one gear?

I take "one gear over-rev" to be 4 to 3 but not 4 to 2, which I don't even see how 2 gears could ever happen.

2000ths

5 to 2 is the other one you hear about. it's called the "money shift" cause it's gonna cost you!

blasphemy101

It's not necessarily a matter of taking more abuse. A misshift in an AP2 does not put you at the same RPM as in an AP1. F22 retainers are stronger, but also heavier, which is the reason you only swap them onto the intake side when you put them in an F20.

Billman250

Yes one gear is 3-2, 4-3, etc. So yes a 2 gear, such as 4 to 2 would be near impossible. But 5 to 2 is possible if you are really not paying attention

AP2 at 8k plus over rev = 9500. No harm done.
AP1 at 9k plus over rev = 10500. Harm done.

AP1 retainer will split at 9700.

I estimate it would take 11k or better to split an ap2 retainer. At that point, the exhaust valves would have hit the pistons at 10700 and it would run like crap.

Hence why ap2 can take it.

hunginator

All of these comments make me feel a lot better about my misshift.

Competitor9

First Billman is the man I would listen to his advice before anyone else. The AP2 valve system is better (as billman said) and it takes alot more for them to crack (as billman said) if you just want to clear your mind, go buy a compression tester it's very easy to do, and a leak down tester. Do both tests and then get back on the road because the engine is probably fine.

http://robrobinette.com/S2000Compression.htm

hunginator

Who is this Billman guy anyway?