Wanting quicker acceleration NC with cosworth Supercharger

[Magpie]

Cams with more lift and less overlap however it depends on the current valve train and what is the max lift possible.

[trickytrev]

Biggest cams you will be able to put in your motor Ron will be Mikes 1.5 cams other wise anything bigger will over lap S/charger and pointless.

[bruce]

It sounds like the supercharger package is not very good (regards it's history). It sounds like it you push it too far (via tuning, etc) it will die.
I'd just leave it as it is. You want speed, sell it and buy something faster OR
flat-shift.

[trickytrev]

It's not the S/charger there was early tuning probs that would cause but bottom end of motor to blow. There has been only one possibly two motors blow in Oz no forged bits, it's the high revs that causes probs.
Any way all this getting away from Novices original question

[Regie]

the CW superchargers are bulletproof!

Ron, hows about a smaller pulley and a re-tune. that will give you a noticeable power gain

Ive dríven Sailor's S/C NC, thats plenty quick enough for a car with stock internals still (around the 170rwkw)

Ive also dríven Trickytrevs NC, fark me its awesome!!! but then again a bit more money has been put under the bonnet

[Novice1]

the CW superchargers are bulletproof!

Ron, hows about a smaller pulley and a re-tune. that will give you a noticeable power gain

Ive dríven Sailor's S/C NC, thats plenty quick enough for a car with stock internals still (around the 170rwkw)

Ive also dríven Trickytrevs NC, fark me its awesome!!! but then again a bit more money has been put under the bonnet

I have contacted Mike from Moto East. Friends car with smaller pulley is pulling 175 kW and it rocks. Waiting for Mikes reply but thinking change of pulley size and tune is most likely scenario.

As a side note Reg friend is no longer selling his Kraftwerks supercharger. He drove lotus which he was thinking of buying and didn,t like it.
novice1

[oztrackdays]

Have you had her on the car scales ?

Do you have a 5 hertz or Better GPS data logger ?

If you have the roadster it truly weighed
1170 kg added a Supercharger 30 kg ?
so allow for an 80 kg bloke

1280 kg Car (More than a FD RX7 now)
160 rwkw/215 rwhp / 1280 kg = 168 bhp per tonne.

Stock Tuned NC roadster can make 100 rwkw and 1250 kg = 105 bhp per tonne

So you have improved your power by about 60% but your power to weight by slightly less

I am a numbers guy and we played with acceleration a bit on my old RX7 pick a speed range
that doesn't need a gear change and measure 100 - 150 kph is normally good.

Here are three of my cars so it's Car,power,weight,time taken, metres needed.

RX7 250 rwkw 1200 kg 5.22 seconds and 188 metres
NB8B 175 rwkw Honda K24 1100 kg 5.38 seconds and 191 metres
NA8 MX5 135 rwkw 880 kg 7 seconds and 249 metres

Grab those numbers and you can see how much acceleration you are getting.

[Magpie]

Have you had her on the car scales ?

If you come out to the dodgy day I'm happy to get the scales out and weight the car will only take 30 mins even less if you want a rough weight. It takes a bit of time to get the pads level. If you can't make it give me a yell when you can.

Like oztrackdays I'm a numbers type person. However not many places on the road where you can do 100-150. You could do the test from 40-80 kmh in the 1:1 gear. Make sure the section of road is flat and do the test in each direction for a total of 6 tests min. Reverse coast down testing. You will need a decent GPS for this even better a datalogger.

[Novice1]

Have you had her on the car scales ?

If you come out to the dodgy day I'm happy to get the scales out and weight the car will only take 30 mins even less if you want a rough weight. It takes a bit of time to get the pads level. If you can't make it give me a yell when you can.

Like oztrackdays I'm a numbers type person. However not many places on the road where you can do 100-150. You could do the test from 40-80 kmh in the 1:1 gear. Make sure the section of road is flat and do the test in each direction for a total of 6 tests min. Reverse coast down testing. You will need a decent GPS for this even better a datalogger.

Roughly have my car at 1152 kgs, with weight saving complete exhaust, Enkei RPF1 wheels. Dry supercharger kit is exactly 30 kgs, so roughly 1182 kgs.
Pretty sure will just go for smaller pulley. Just waiting for Mike to get back to me.

Novice1

[Novice1]

Anyone know what pulley size Standard Cosworth kit comes with.

Heard 33 and 34. Plan is to go down a size or two.

Would further tuning be required with change in pulley size. ( Excuse my ignorance.)

Novice1

[trickytrev]

Ron most came with 3.3 or 3.2 unless you drop down to a 2.8 you propbably wont notice to much change but thats what im running. its 14pd boost pulley but around 3200revs on my car it peaaks out to 17pd up to 4800 ish thenbacks back down to 14 pd through to redline. But with stock internals a bottom end problem wont be far away

[trickytrev]

Oh sorry yes retune every pulley size change

[Novice1]

Oh sorry yes retune every pulley size change

Trev, you have link for purchasing pulleys.

Cheers Nov1

[Dan]

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.

Sent from my SM-N9005 using Tapatalk

[Corey]

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