Another "What common engine" question...

The Common Engine Sound thread got me thinking.  What engines have the highest factory redline?

Let's break them up separately...

V8

V6

Inline 6

Inline 4

Anything rotary.

For 4 cylinder, do we need to differentiate between motorcycle and car?

AP1 S2000 was at 9k, right?

For V8s I'm thinking LS7 at 7k, 5.0 Coyote also at 7k, and 5.2 Voodoo at 8250.

VQ35/37DE is 7500

Daylan C said:

For V8s I'm thinking LS7 at 7k, 5.0 Coyote also at 7k, and 5.2 Voodoo at 8250.

Add the BMW S62 to the 7k club. 

In reply to Brotus7 :

VQ35DE non-revup is 6600, VQ35DE revup is 7k, VQ35HR is 7500, VQ37VHR is also 7500

My member is fading, but my supercharged MR2 was 7500.

https://www.roadandtrack.com/car-culture/g6599/highest-revving-production-cars/

KyAllroad (Jeremy) said:

Anything rotary.

I wish. My 12a's factory redline is 7,000... but it doesn't have a rev limiter, so I guess it's infinity if you want to count it that way. I've had it up around 9 or so before.

2nd gens also redline at 7, 3rd gens at 8 and RX8's at 8500. Of course that's just what the tach says.

The highest I6 I can think of is BMW S54 factory 8k 

KyAllroad (Jeremy) said:

Anything rotary.

Not by a long shot.  Most rotaries redlined at 6500-7000.  The series 5s and FDs redlined at 8000, RX-8s were at 9000.

There were some Kei class cars that redlined in the 11-12k range, basically motorcycle engines in a wee little chassis.

TheRX7Project said:

KyAllroad (Jeremy) said:

Anything rotary.

I wish. My 12a's factory redline is 7,000... but it doesn't have a rev limiter, so I guess it's infinity if you want to count it that way. I've had it up around 9 or so before.

2nd gens also redline at 7, 3rd gens at 8 and RX8's at 8500. Of course that's just what the tach says.

Most 1st-gen tachs are horribly inaccurate.  The spec is that they may read .5% low or 10% high, and they tended to err to the high side, so when the tach ran out of numbers at 8000 you were really only running 7200-7300.

Either that, or Megasquirt and Autometer both are really inaccurate

If you want fun, check the odometer against mile markers, it will usually be accurate.  Check the speedometer against a stopwatch, it will probably be reading rather high.  Then compare the tach vs. speedo and back calculate the error in the tach.

Daylan C said:

For V8s I'm thinking LS7 at 7k, 5.0 Coyote also at 7k, and 5.2 Voodoo at 8250.

Didn't the V8 M3 rev higher than that?

buzzboy said:

The highest I6 I can think of is BMW S54 factory 8k 

 

Honda's CBX redlined at 9k...

Knurled. said:

Didn't the V8 M3 rev higher than that?

Yes it did.  A little research says the S65 in there redlines at 8400. 

Knurled. said:

TheRX7Project said:

KyAllroad (Jeremy) said:

Anything rotary.

I wish. My 12a's factory redline is 7,000... but it doesn't have a rev limiter, so I guess it's infinity if you want to count it that way. I've had it up around 9 or so before.

2nd gens also redline at 7, 3rd gens at 8 and RX8's at 8500. Of course that's just what the tach says.

 

Most 1st-gen tachs are horribly inaccurate.  The spec is that they may read .5% low or 10% high, and they tended to err to the high side, so when the tach ran out of numbers at 8000 you were really only running 7200-7300.

 

Either that, or Megasquirt and Autometer both are really inaccurate

 

If you want fun, check the odometer against mile markers, it will usually be accurate.  Check the speedometer against a stopwatch, it will probably be reading rather high.  Then compare the tach vs. speedo and back calculate the error in the tach.

I've heard that as well regarding the tachs being inaccurate, but what is odd is that my shift light still comes on at near the correct RPM on my tach. I've wondered about hooking up a different tach to see the difference. 

I have 205/50R15s on my car so my speedo is off anyway, I've been using a GPS speedo/odo program (DigiHUD) which has proven itself very accurate (used it for a TSD rally). When I finally get off my butt and rewire the car to fix my hack job, I'll use a big aftermarket tach in the factory cluster spot and set my dash up for a GPS HUD.

Yamaha R6 that I had redlined at 13,5000.

What about a flat 6? Porsche GT3-RS will turn 9,000.

rslifkin said:

Knurled. said:

Didn't the V8 M3 rev higher than that?

Yes it did.  A little research says the S65 in there redlines at 8400. 

Ferrari 360 and 430 both redline at 8500. 458 redlines at 9k.Not sure that any of these qualify as common, though.

Furious_E said:

rslifkin said:

Knurled. said:

Didn't the V8 M3 rev higher than that?

Yes it did.  A little research says the S65 in there redlines at 8400. 

Ferrari 360 and 430 both redline at 8500. 458 redlines at 9k.Not sure that any of these qualify as common, though.

8250 in the B7 Audi RS4.

1. If you're not using a digital tach it doesn't matter.

2. Radical V8s are 10k+ with Hayabusa parts. 

3. Destroked LS7 motors have turned 9k in kit cars. (In the 90s we built a gutted 305 IROC 5 speed with a 302 crank and 4 bolt main caps, custom cam, heads, intake, plenum, ignition and hit 9k rpm until a rod went through the block. We didn't think about titanium rods back then, but now we know they're in the LS7)

4. Best Motoring had an NSX and S2000 at 10k rpm in Japan.

5. 997 GT3s go 9k

6. My SVX EG33 motor was used in aircraft because it was light and reliable and also turbocharged by the late John Edwards for 1000hp sand cars. The non interference motor had a 7k redline stock in 92 and could be had on eBay for under $1k, mostly for VW vans, but had amazing potential not many people used. Only now with the BRZ are people realizing the genius of having a boxer motor in the front. 

Curtis said:

Yamaha R6 that I had redlined at 13,5000.

New R6 redlines at 16,500.

Knurled. said:

 

 

If you want fun, check the odometer against mile markers, it will usually be accurate.  Check the speedometer against a stopwatch, it will probably be reading rather high.  Then compare the tach vs. speedo and back calculate the error in the tach.

I stopped doing geeky engineering nerd stuff like this because I was never happy that my speedometer and tach were not only wrong but there was nothing I could do to make them read right.  After about the 5th vehicle I discovered had these flaws my wife bluntly told me I was wasting my time on stuff that didn't matter and I couldn't control anyway.  Mrs. Jharry 3 has both an engineering degree and an M.D. so I have to have all my duckies in a row when we  have a discussion because little gets past her.

RossD said:

My member is fading,

There are pills for that