turbo or supercharger

[treeseries]

im considering forced induction i was wondering whats the pro's and con's of each why should i choose one over the other?its an m70 lump an from an e32

[E30BeemerLad]

each will have their pro's & con's, but the important question to ask yourself is what are you going to use the car for and what sort of power delivery do you want?

I certainly would not say no to a supercharger, but think I would favour the more explosive delivery of turbo

[projectmick]

If you want it more as a daily driver, then possibly the s/c would be a "better" option, gives a more progressive power delivery, wheras a turbo will kick in more suddenly.

Does depend on how each is set-up though, if done properly a turbo can still be used in a daily driver, but personally for me the s/c edges it on a day to day basis.

[Ant]

you can have a progressive turbo, just wont win headline prizes for outright BHP , but if a bigger area under the graph is what you're after, either option, correctly executed will provide easily the best bang for buck out there.

[fuzzy]

i went from a bigger turbo to a smaller one so i had more instant response and quicker acceleration. turbo's arent hard to live with on a daily driver unles its excessively large giving lots of lag.

[fuzzy]

how much future tuning potential is there in a supercharger? are they as easily tunable as turbos?

[Ant]

headroom on superchargers ? yes, but only if you can overspec in the 1st place

use an oversized S/C for the app @ low boost, then swop to an underdrive pulley later for more boost and HP as and when required.

Example.

M20B25K on S/C for 1 Bar boost,

Use C30 in a big trim size, no worries, or

C38 in medium trim, will outperform the C30 @ the same boost level, an be capable of 1.6Bar with a pulley change, and neither would be into the surge range and pump excess heat into he intake charge.

Headroom = Deeper pockets though, although more cost effective in the long term.

Turbo, similar story although a big A/R turbine will spool later then a lower A/R with the same Turbine wheel, but make more HP as it breathes better.

M70 is hugely under stressed in OE form, space is an issue however...

[treeseries]

quick bump

ant thanks for all your in put something i was wondering though is which is the more contained package in terms of space? which aplication (turbo/sc) would require less pipe work and wiring etc????

and how much do you think it would set me back? if i came to you for a rebuild and turbo/sc on a m70 lump what would be a sensible quote for all the work, uprated pistons, buying and installing the turbo the full package runningsay 6-800bhp?

[Jhonno]

Well DIY a nice S50 build was going to cost me 5k or there abouts..