Why Aren't We All Swapping To Superchargers?

[STATUS]

I think if someone made a Whipple supercharger kit for a skyline that didn't require $5k of fabrication for custom manifolds and relocating power steering etc and wasn't ridiculously loud there would be a definite market for it.

I know there is someone on here that has supercharged his RB25DE but he has had lots of issues with the bypass valve and making the car quieter than a 747 on full noise. If these problems could be ironed out I think a lot of people would use them.

Would make the engine drive like a big capacity v8 which all the RB30 guys seem to love.

yeah biggest issue is noise, we can get them through epa piece of piss (exhaust noise and pollution) but the blower itself emits to much noise.... and the blower wont pass the noise requirements

best bet is to use both charger and turbo. My 1977 ltd was being built to run a W305 and dual T04z's on a 427 windsor.... but ive lost interest and am selling it all off.

[VB-]

hey trent has lukes car got the new motor in it yet? or is he still on the dunger motor?

[Rolls]

yeah biggest issue is noise, we can get them through epa piece of piss (exhaust noise and pollution) but the blower itself emits to much noise.... and the blower wont pass the noise requirements

All the v8s I see them on it makes a noise but it isn't that loud, are some units worse than others?

[r33_racer]

Any blower that is side mounted tends to make more noise then one mounted onto the inlet manifold. I honestly believe now that the only way is to run a turbo pre supercharger to help reduce the intake noise. The compressor cover and wheel will help cancel or dampen that noise.

[KISIN]

compound turbo > all.

[Rolls]

compound turbo > all.

Is that one big turbo and one small one ?

[r33_racer]

One smaller turbo feeding into another bigger one???

That idea is not as good as a supercharger with turbo. You can still have some margin of lag and that would obviously increase as you go up in sizes to match your hp goals.

The best part of the supercharger is full boost as soon as you blip the throttle.

[KISIN]

One smaller turbo feeding into another bigger one???

That idea is not as good as a supercharger with turbo. You can still have some margin of lag and that would obviously increase as you go up in sizes to match your hp goals.

The best part of the supercharger is full boost as soon as you blip the throttle.

Compound shits all over a twincharged system...IF setup correctly!

[Rolls]

Compound shits all over a twincharged system...IF setup correctly!

why is that?

[r33_racer]

Yeh I would also like to know why? I havent been in car with a compound turbo setup, but I have been in a twincharged car and it was simply amazing.

I cant see how your suggested setup is so much better? Please explain why it shits all over a twincharged system and how a correctly setup compound system should be?

[Rolls]

Yeah I was of the opinion a twin charged system would be even better than a compound turbo because no matter how small the first turbo is a super charger is still going to come on faster and give better throttle response, then you have the big turbo in both systems for the torque high in the rpm range.

[Harey]

interesting trent. obviously different applications so can't accurately compare, but for arguments sake it's good. look at the torque. the twin screw made 200nm more at 50kmh less (1000rpm), but at 2500rpm the twin screw is making double the torque. that thing would be an absolute pig in the wet..... or the damp, or even if it looked like rainging, LOL.

I cant compare directly but my brother has a twin screw supercharged V6 and makes about 200rwkw and it is great in the wet. The power is so progressive, you can keep it on the edge of traction very easily. Whereas my turbo skyline is much harder, boost comes on so quickly that it looses traction quickly or your not boosting it all and getting traction. Obviously there is a massive difference in power/torque figures but I think the general principle is there.

[mad082]

what turbo do you have? i found my 33 with the stock turbo at 14psi to be pretty good in the wet, even with average tyres on it.

you also have to remember that the commodores, etc have much taller gearing that skylines, so comparing the traction in 2nd gear in a commodore to 2nd gear in a skyline isn't that accurate. it would actually be more accurate to compare traction in 2nd gear in the commodore to 3rd gear in the skyline.

[Rolls]

what turbo do you have? i found my 33 with the stock turbo at 14psi to be pretty good in the wet, even with average tyres on it.

you also have to remember that the commodores, etc have much taller gearing that skylines, so comparing the traction in 2nd gear in a commodore to 2nd gear in a skyline isn't that accurate. it would actually be more accurate to compare traction in 2nd gear in the commodore to 3rd gear in the skyline.

yeah but the commodore makes most of its power from 2.5-4k where as the skyline makes most of it from 4-6k so the difference in gearing actually makes them about the same.

a turbo is always going to be harder to control traction than a supercharger as there is some lag between pressing the pedal to the power being generated, there is some with superchargers but it almost always less.

[Harey]

The best example as said previously is a twin screw supercharger feels like a larger capacity engine. It feels like no lag (obviously there is a tiny bit) and you can control exactly the % of power/torque that you want to make.

[r33_racer]

I can attest to that fact about the twin screw. Power control is extremely easy and linear. There really is no lag. At the most, 500rpm. My car idles at 1000rpm and it started making boost from 1500rpm and by about 2000rpm is was at desired max boost which holds perfectly to redline...except in my case it would drop a few psi as my belt slips lol.