high revving NA engine
 

Toyota and subaru have been touting the fa20 as a high revving engine but to me 7400 rpm red line just isn't realy that high to me. My cobalt ss with a gm stage kit had a 7k red line. How stable is this engine with a higher redline. I think ive seen some people here with 7.9k redline.

You are correct. 7.4K RPM is far from "high revving". My engine stock hits 8.5K RPM without even trying and I wouldn't consider that high revving either. My engine that hit 10k RPM.. now that.. that was a screamer!

I wouldnt really say its high revving, but it is higher than most cars on the road, Other than rotarys, cars that cost much much more, and bikes.

7400rpms is nothing special. In fact, in the 4 cylinder sports car world I consider it delightfully average. But then again I've owned several Honda's so I'm spoiled when it comes to RPM's.

7800 was a no brainer for 4B11t's.


This motor can rev, but some of the ecu tables will need to be re-scaled and it will need either cams or FI to make it worth reving deep.

With Ecutek tune the redline is set to 8 000 RPM. At this level for a car we can say it is a high revolution.

Except for the RX-8 and the S2000 most of the high rev cars goes to 8 000 - 8500RPM.

Two points:
1 "High" is a subjective term. It does not mean anything concrete per se.
2 The term has been used by marketing people to promote their engine. It might only have revved to 2500rpm and they would still call it high.

Spoon EK9... now that's a high revving NA engine

Mmmmm high RPMs...

[ame="http://www.youtube.com/watch?v=0_CmhEL49mY"]Integra Type R 11,000rpm - YouTube[/ame]

My second car was a 1981 Mustang GL with the base-model 2.3 Liter 4-cylinder. After I bought a new (351C) engine for it I thought that I would see how high that motor could rev.

It made it to somewhere near 7k before it threw a rod through the oil pan. I suppose our engines are high-revving when compared to those.

Scott

To certain extend, love to have higher RPM... reality in DD, no thanks. This car is low HP as is, I don't want gutless car that need to rev over 10k RPM to pass a smart4two

better buy a bike if you like rpm's that much

Won't be gutless with a supercharger.. nothing but gains and an extra 1,100 rpm to play with over stock with the (8,500 rpm rev limit that is) :wub:

WTB 17K RPMs and safety of cage.

Don't want SC. I want to keep it NA. Nothing wrong w SC & 1.1k RPM redline... & I bet it'll be fun car... but I'm somewhat satisfy w current RPM.

...maybe extra 200rpm would be nice, but not complaining here :thumbsup:

I had an 09 ralliart n man that thin was fast most underrated car I swear to you

my camaro redlines at 5200, and my e30 redlines at 4500. this is plenty high for me.

I was actually a little surprised it didn't have a higher redline. The EJ207 2L turbo motor has had an 8000 RPM redline since 2001. Way different motor though internally.

I know autox guys with tunes running the car to 7800-7900.

I for one like the midrange toque of is motor versus something which needs to be wound up to 9000 RPM.

This is why I am waiting a few years to get used to the car as it is from the factory while waiting to see what kind of potential people can squeeze out of this motor. I'm a fan of high-reving naturally aspirated motors myself, and though I'm not expecting this boxer motor to achieve EK9 heights, it would be awesome to hear it rev to 8800.

Higher revving than a cobalt ss with a gm stage kit and a lot higher revving than a Harley Davidson.
Not many current models rev over 7,000rpm unless they are mega expensive.

Just a few hundred more to 8000 would have been a nice psychologically pleasing number, or even 7500 instead of 7400. Round numbers are nice. Then again, 8600 has a certain psychological appeal too.

We know it's more than capable of higher rpm, it's just rev limited in it's current state of tune.

People act like a higher redline means higher performance or something. Over 7k is beyond the average car... sure you can tune it to 8K but for what really?

The higher redline isn't always used just because you are still making power. Sometimes the added flexibility helps you hold a gear on the track just a bit longer. If the car was completely safe revving to 8500rpm I think it would be ideal. Not because you need that extra rpm, but because it can come in handy on the course.

Not to mention it feels bad ass.

To me what matters is the power band. I've driven both AP1 and AP2 S2000s, which can rev to 9k and 8k respectively. And while that's awesome, they are completely gutless below about 6 or 7k. You NEED to keep them in the relatively small top end powerband for it to feel like an S2000 and not a Civic EX. That's about 2-3,000 RPM of powerband. You look at our dyno charts and we have a nice flat torque curve from 4.5k-7k, giving just about the same 2-3k powerband, just shifted down a bit. More revs is not always better. A usable powerband is.

Considering that 90% of the cars on the road have a 6000rpm redline, 7450 is pretty decent.

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nice tread BTW :)

You misunderstood my post. Regardless of whether you are making peak power at 8k, being able to hold the gear is useful in a track environment. I like to choose when to shift, rather than have a computer tell me I need to by abruptly cutting power. Not only does that unsettle the chassis in a corner, but it is annoying.

I'm sure the guys who have tracked the car extensively can agree. Plus, holding the higher rpm can help keep you away from that nasty torque dip.

The reason for a higher rev limit is, assuming the engine can breath at the desired rpm:

HP=(T*RPM)/5252

an engine that makes 145lbft at 6,000 rpm makes 165 hp at 6,000 rpm
an engine that makes 145lbft at 8,000 rpm makes 220 hp at 8,000 rpm

if you can carry the torque the deeper you rev the more power you can make.

If the engine can't breath then the only reason is, as others have said, so you can hold a gear longer on track or at a drag strip.

Has anyone noticed a difference or improvement I should say when hitting above 6K rpm when switching to a higher quality oil. I'm finished with the free oil changes from dealer so motul or similar is going into engine next.

My driving style has evolved into holding my shifts longer and generally loitering in the >6K rpm range. One of the nice things about having a stock exhaust, and stock everything, is that I can realistically drive this way on the street without raising too much commotion.

A quick tally of the cars I consider close to be the Twins competition -

BRZ/GT86/FR-S - 205Nm @ 6.4-6.6krpm/147kW @ 7krpm
MX5 2.0i - 188Nm @ 5krpm/118kW @ 7krpm
RCZ 200 - 275Nm @ 1.77krpm/147kW @ 5.8krpm
SLK 250 - 310Nm @ 2-4.3krpm/150kW @ 5.5krpm
Z4 20i - 270Nm @ 1.25-4.5krm/135kW @ 5-6.25krpm
TT 2.0TFSI - 370Nm @ 1.6-4.3krpm/169kW @ 4.5-6.2krpm

If we look at factory figures with one exception every other car makes peek power bellow the Twins peek torque. In relative terms I think that makes a high revving engine.