Wanting quicker acceleration NC with cosworth Supercharger

Novice1 · Postby **Novice1** » Sat Jan 23, 2016 11:59 am

Dan wrote:Moto East sell them here http://www.moto-east.com/store/mazda/20 ... ulley.html, since he's doing your tune he could also give you advice on the right pulley size to keep your engine safe.

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Thanks for that.

Still waiting to hear from Mike.

Novice1

Novice1 · Postby **Novice1** » Sat Jan 23, 2016 12:00 pm

Corey wrote:Have you considered e85? I think it would help being a bosted high compression engine.

E85 not always available in my area.

Novice1

Novice1 · Postby **Novice1** » Sat Jan 23, 2016 12:01 pm

Does anyone have a calculating tool for determining increase in psi and likely power increase.

Novice1

Dan · Postby **Dan** » Sat Jan 23, 2016 2:58 pm

Novice1 wrote:Does anyone have a calculating tool for determining increase in psi and likely power increase.

Novice1

Nothing that is accurate. The reason It's difficult to predict the power increase from additional boost as there are a lot of variables. The best way to make an approximation of the likely power increase is to find someone else that has done the same change with similar supporting mods.

The key variable that makes it hard to estimate the power increase when reducing the pulley size on a supercharger is the resulting increase in the intake charge temperature which has a number of impacts including reducing the density of the air entering the engine, possibly the amount of timing that your tuner can run without knock (E85 would help this) etc..

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Postby **NitroDann** » Sat Jan 23, 2016 3:04 pm

As I understand these aren't knock limited and its not a Turbo, you can't just crank the boost until it is knock limited to take advantage of alcohol. The issue is that they are conrod limited. So you want more torque in an even manner. In the case of these blown cars they drop off up top pretty hard so for me the answer is clearly cams.

Novice1 · Postby **Novice1** » Sat Jan 23, 2016 3:20 pm

NitroDann wrote:As I understand these aren't knock limited and its not a Turbo, you can't just crank the boost until it is knock limited to take advantage of alcohol. The issue is that they are conrod limited. So you want more torque in an even manner. In the case of these blown cars they drop off up top pretty hard so for me the answer is clearly cams.

Thanks Dan.

Waiting on response fom Mike Moto East re options.

Friend with Kraftwerks s/c is running stock internals, 14 psi and 249 hp atw.

Mike has tuned Mx5,s in the states standard internals to a max of 14 psi.

My car currently 8 psi. I am thinking 10-11 psi max.

Novice1

Novice1 · Postby **Novice1** » Sat Jan 23, 2016 3:22 pm

Found this psi increase calculator.

http://www.wallaceracing.com/hp-blower.php

Novice1

Postby **NitroDann** » Sat Jan 23, 2016 3:43 pm

PSI is a measure of intake restriction VS total airflow, not performance, 'danger levels', horsepower or anything else.

Dann

Novice1 · Postby **Novice1** » Tue Jan 26, 2016 10:16 am

Pulley ordered.

Looking at 20-25 hp increase. Will be happy with that.

Novice1

deanb90 · Postby **deanb90** » Tue Jan 26, 2016 11:55 am

Change diff to 4.1

My old supercharged NC had 4.1 and it was much quicker than one without. Cost me $800. First and second gear pulls really pushed you right back into your seat it was great. I miss that car

Sent from my ass

Novice1 · Postby **Novice1** » Tue Jan 26, 2016 7:31 pm

[quote="deanb90"]Change diff to 4.1

My old supercharged NC had 4.1 and it was much quicker than one without. Cost me $800. First and second gear pulls really pushed you right back into your seat it was great. I miss that car

I have had 4:1 diff before, found hit rev limiter too often.

Novice1

Regie · Postby **Regie** » Wed Jan 27, 2016 8:41 am

But you want quicker acceleration?????

Put the 4.1 back in

With the smaller pulley u will also be hitting the revlimiter often :shock:

Novice1 · Postby **Novice1** » Wed Jan 27, 2016 5:00 pm

Regie wrote:But you want quicker acceleration?????

Put the 4.1 back in

With the smaller pulley u will also be hitting the revlimiter often

Nope pulley downsize it is.

I sold the 4:1 diff.

Novice1

Steampunk · Postby **Steampunk** » Wed Jan 27, 2016 8:43 pm

Change of driving habits insofar as anticipating to change gears much sooner than usual, is needed.

More power and/or faster gearing will always cause faster revving, it's simply the nature of things.

The only way to achieve fast acceleration WITHOUT the engine revving as fast or high is to have a high capacity engine, or diesel.

Novice1 · Postby **Novice1** » Wed Jan 27, 2016 8:59 pm

Steampunk wrote:Change of driving habits insofar as anticipating to change gears much sooner than usual, is needed.

More power and/or faster gearing will always cause faster revving, it's simply the nature of things.

The only way to achieve fast acceleration WITHOUT the engine revving as fast or high is to have a high capacity engine, or diesel.

strangely enough i don,t like the mustang

novice1