New wheel size & gear ratio calculator with graphic

littlefeller · Post by **littlefeller** » Wed Nov 21, 2012 12:29 am

yeh well, cant fall out with myself, and i like port

we need a revival of crazys drunken thoughs thread

Post by **si import** » Wed Nov 21, 2012 1:10 am

U2Q7
First gear top speed 36.3 mph
Second gear min VTEC speed 34.9 mph
Second gear top speed 57.1 mph
Third gear min VTEC speed 49.3 mph
Third gear top speed 80.6 mph
Fourth gear min VTEC speed 68.2 mph
Fourth gear top speed 111.4 mph
Fifth gear min VTEC speed 83.9 mph
Fifth gear top speed 137.2 mph

corrected final drive 4.439

Ride heigh change -12.3 mm

tyre wall height 87.75 mm (100mm stock)

Post by **NafemanNathan** » Wed Nov 21, 2012 8:45 am

I need to check my rev range once the car's back on the road, but seriously?... 167.1 mph?! Nah!...

First gear top speed 39.8 mph
Second gear min VTEC speed 35.7 mph
Second gear top speed 67.4 mph
Third gear min VTEC speed 51.2 mph
Third gear top speed 96.7 mph
Fourth gear min VTEC speed 67.3 mph
Fourth gear top speed 127.2 mph
Fifth gear min VTEC speed 88.5 mph
Fifth gear top speed 167.1 mph

corrected final drive 4.232

Ride heigh change 2.45 mm

tyre wall height 102.50 mm (100mm stock)

Post by **Merlin** » Wed Nov 21, 2012 8:56 am

littlefeller wrote:
A1ex wrote:I think m2p4 with the new engine and drop the vtec cross over a bit
not a good idea, vtec crossover is 5250rpm for a reason, im not telling why this is so untill others post why they believe it is at 5250rpm. especialy that tuning guy

VTEC point in the new engine is 6K with redline at 8.4K. Things will change once I get a new final drive

Even in my stock 5th I dont drop out of VTEC http://www.youtube.com/watch?v=OcZ5_zvhVT8&#t=1m03s

A1ex · Post by **A1ex** » Wed Nov 21, 2012 9:38 am

NafemanNathan wrote:I need to check my rev range once the car's back on the road, but seriously?... 167.1 mph?! Nah!...

First gear top speed 39.8 mph
Second gear min VTEC speed 35.7 mph
Second gear top speed 67.4 mph
Third gear min VTEC speed 51.2 mph
Third gear top speed 96.7 mph
Fourth gear min VTEC speed 67.3 mph
Fourth gear top speed 127.2 mph
Fifth gear min VTEC speed 88.5 mph
Fifth gear top speed 167.1 mph

corrected final drive 4.232

Ride heigh change 2.45 mm

tyre wall height 102.50 mm (100mm stock)

I got 161mph with mine with the M2B4, it has a long 5th gear

Post by **NafemanNathan** » Wed Nov 21, 2012 9:57 am

Have you actually got that speed out of the car... On a private track?

A1ex · Post by **A1ex** » Wed Nov 21, 2012 11:20 am

Nope.

Terminal on the dyno when it ran with PAW back in feb was 151mph which is where peak power was in 5th.

It's not telling you how fast the car can go, it's just giving the limitations of each gear.

I'm going to look at doing some theoretical 0-60, 0-100 times etc but I want it to take into consideration gear ratios too. Finding the equations to do that could prove difficult mind.

Post by **NafemanNathan** » Wed Nov 21, 2012 11:32 am

A1ex wrote:It's not telling you how fast the car can go, it's just giving the limitations of each gear.

Same difference surely? (Removing wind factors, terrain etc)

A1ex · Post by **A1ex** » Wed Nov 21, 2012 11:59 am

That's where horsepower and torque curves cross due to the relationship between the two.

NafemanNathan wrote:
A1ex wrote:It's not telling you how fast the car can go, it's just giving the limitations of each gear.
Same difference surely? (Removing wind factors, terrain etc)

Not really, look at a derv. Stupidly long 5th or 6th gear and a rubbish top speed. Just because you'd hit the limiter in 5th at 160mph doesn't mean the car can get these does it?

A1ex · Post by **A1ex** » Wed Nov 21, 2012 12:01 pm

This is the equation;

HP = Torque x RPM ÷ 5252.

Which is why they ALWAYS cross at 5252prm