Hi all,
Building an '89 Civic for autocross duty. Stock internals, K&N CAI, DC 4-2-1, Thermal R&D exhaust. Getting a custom chip burnt to manage A/F.

I want a good idea of where to set the rev limit. Since the car is going to be used for autocross, the ability to go a few extra hundred RPM (as long as it can safely stay there for a couple seconds) would be a big advantage.

So for those that have run D16A6's with stock internals, where did you set the rev limit, and if you overrevved one, at what RPM did it blow?

Thanks!

 

your engine doesn't make power past the stock rev limit (if your using stock cams) so it wouldn't benefit you at all, it would only slow you down when u could be shifting into the next gear and accelerating faster

mike

 

the stock d16a6 will not make power near the stock redline and past it. you would need an upgraded camshaft to adjust the powerband of the engine. Our Exospeed cams does let you feel more power past the stock revlimiter and is perfect for autoxing since it provides power from 3000-7500. it will feel good up to 7500 and is great on the track since you will be at about 6500 most of the time and thats where the peak power and tq is on our SR909 cam.
Wil

 

I know of people who can help reprogram your ecu to run extra rpm if you are interested.

 

Thanks for the input so far guys.

In my situation (autocross) the upshift to third usually won't be worth it, as I'll soon have to do a downshift back to second. Even though the motor will be well past its power peak, it's much easier from a driving perspective to not have to shift.

Assuming the motor has the flexibility, that is. Right now the motor is apart getting all new OEM pistons, rings, bearings, and valvesprings. Assuming everything is put together right, how high would it be reasonable to set the limiter? The car will only see those high engine speeds for 1-2 seconds at a time, at most 6-7 times in a day.

The present 190k mile motor has a ZC chip in it now (7500rpm limit?) and has been doing fine. I'm hoping to set the fresh one to 7800 or 8000. Any thoughts on if this will work, and other things I could maybe do to help the 'stock' motor live to those rpm levels?

Thanks a ton!

 

Theres a few of stock touring car D16A6 in my city ,stock setup just like yours,
they rev max to 7300, and never pass 7500 since they only can running stock cam due to the regulation..
I see few people blew their D16A (stock rods) when they pass 8200

 

well, the ZC cutoff is 7800 rpm, the a6 cutoff is 7200(methinks). these are the fuel cutoffs not the redline specs. dont listen to the guys telling you that you cant make power at or past the stock redline, as every motor is different, but for now, i would stick with the stock limiter until you are a little more comfortable autocrossing it. and as for the question about where the engine will blow, you dont want to be near this rpm at all, unless you feel like bringing a trailer as a backup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket &raquo;</TD></TR><TR><TD CLASS="quote">I know of people who can help reprogram your ecu to run extra rpm if you are interested.</TD></TR></TABLE>
Rocket, where is your plug for your A6 cam? My engine is done and will be installed and fired in the next two weeks. i'll see how well your cam performs
stan

 

Carlo, thanks for the input. So the problem they had was with rods failing, and not the valves hitting the pistons?

Sobe, while I get more comfortable in the car all the time, I think 4th at Nationals in STS (codriver placed 1st) means I'm relatively at ease behind the wheel.

I'm thinking I'll set it to 8000, and get a big tach with a shift light set at about 7500.