Bullet superchargers

ben wilson · Postby **ben wilson** » Thu Mar 19, 2015 7:02 pm

A thought came to me randomly last night, they haven't fitted an inlet restrictor have they?

That would limit top end boost while giving a big kick in the mid range torque.

Novice1 · Postby **Novice1** » Thu Mar 19, 2015 7:58 pm

ben wilson wrote:A thought came to me randomly last night, they haven't fitted an inlet restrictor have they?

That would limit top end boost while giving a big kick in the mid range torque.

It is very torquey over 300 NM.

Hoping to start some tuning next week, so will see how it goes.

Novice1

Postby **NitroDann** » Thu Mar 19, 2015 8:16 pm

300nm measured where, even at the crank that's really not a lot?

Novice1 · Postby **Novice1** » Fri Mar 20, 2015 9:05 am

NitroDann wrote:300nm measured where, even at the crank that's really not a lot?

Dyno chart is at tuners garage, but from memory 320 plus ATW.

Standard NC around 188-190 NM.

Novice1

hks_kansei · Postby **hks_kansei** » Fri Mar 20, 2015 9:18 am

I always thought that wheel torque on a dyno should measure quite high? (somehting about gearing or whatever)

When I dyno'd my old car, a Ford Mondeo, the chart showed wheel torque as something like 400nm
from memory the factory quoted engine torque was 140nm or something.

Dan · Postby **Dan** » Fri Mar 20, 2015 9:35 am

Maybe you are comparing nm to lb-ft?

hks_kansei · Postby **hks_kansei** » Fri Mar 20, 2015 10:28 am

Dan wrote:Maybe you are comparing nm to lb-ft?

nope, all metric.

gear ratios, diff, ratio, and tyre size all add to magnify the torque.

WHeel dynos usually use 4th, which on most cars is close to 1:1 ratio.
Then the diff ratio, which on an NB is anywhere from 4.1:1 to 3.6:1
Then whatever sized wheel/tyre combo.

Postby **NitroDann** » Fri Mar 20, 2015 12:27 pm

Yeah as kansei said.

A stock na6 dynos at over 1000NM in 1st gear.

Dann

Novice1 · Postby **Novice1** » Fri Mar 20, 2015 4:50 pm

320 NM plus was fourth gear from memory.

Novice1

hks_kansei · Postby **hks_kansei** » Fri Mar 20, 2015 5:03 pm

Still sounds really low, unless it's a corrected value?

as I said, my Mondeo Dyno'd around 400 (uncorrected)

I would hope that a stock NC would outdo that, let alone a supercharged one!

ben wilson · Postby **ben wilson** » Fri Mar 20, 2015 5:48 pm

It originally had 200NM, now it has 325NM.

The actual numbers don't matter, just the difference.

A 60% improvement in torque sounds about right for 7lbs, but a 14% increase in peak power makes me think that there is something wrong here...

Novice1 - Does it hit 7lbs before redline?

Regie · Postby **Regie** » Fri Apr 10, 2015 5:23 pm

any updates?

Novice1 · Postby **Novice1** » Fri Apr 10, 2015 6:45 pm

No updates Regie. Unless I can find Ecutek tuner I think I am stuck with what I,ve got.

Novice1

Regie · Postby **Regie** » Sat Apr 11, 2015 8:38 pm

So your mechanic "the best tuner in QLD" couldn't do anything for you?

You might have to head overseas for a good tune. Mike from Moto-east, all I've herd is praise from what he produces

http://www.moto-east.com/store/mazda/20 ... ducts.html