Well, not really bored... Was driving my dad's 740 around today and fell back in love with low-end torque, so it had me wondering if you could switch out the turbo on a 951 for a supercharger?

The engine obviously built to run the fi, so I would think you could get close to the same power without much engine mods. Aside from the parasitic power loss and less high-end power (depending upon pulley setup), would it be a somewhat effective way to make a torque monster?


Not that I'm planning on doing it - I just steal the bmw whenever I want torque. It just had me wondering. It'd probably be cheaper to simply slap a sc on a s2 or something rather than converting a 951 anyway.

 

You could. It wouldnt be very hard. But IMO a waste.

 

You could always start another 'Can I add a s/c and keep my turbo' thread. It's always good for varying opinions. lol

 

Plenty of guys with Mustang Cobras go from SC to turbo, so no biggie.

But as stated above, you would be better off just puting that money into the turbo upgrade, parts. etc.

Now, if you could pick up a dirt cheap NA and then SC that one. That would be pretty cool and maybe worth the investment.

 

because of the headers and the engine being on its side it wouldn't be hard to fit it. But you can get low end torque with the right turbo set up. People here just go for big power not low end. A gt28rs would get almost instant boost from very low rpms, overall power is just limited.

 

Superchargers are less efficient that turbos. Since the 951 already has a turbo it would make more economical sense to upgrade that as oppose to go for a downgrade and install a supercharger.

 

Yeah, thats what I had figured. Everything I had thought of was as people have posted, of it being less effecient and costly and not really worth it - also that a turbo could get that much low end torque, but you then lose a lot of top-end boosting power.

Anyway, just curious if anyone else had ever thought of it. If nothing else it'd make working on the exhaust a lot easier.

 

Anything can be done. How much money do you have burning a hole in your pocket?

 

Or buy a variable vane turbo and have the best of both worlds.

 

keep the turbo and install a supercharger too inplace of the a\c compressor badda bing badda boom there is some drift guy that has it, at a certain rpm the S\C cuts out and the turbo takes over

 

For a diesel and have it melt? As far as i know there are no variable vane turbos for petrol cars that you can buy off the shelf.

If you want low end torque without sacrificing top end why don't you look into a rotrex setup they are expensive, but they are very effecient. They can be installed with a 2 speed transmission so it spins faster at low rpms and slower at high rpms so it maintains even boost pressure. These are the same things the koenigsegg cars use.

 

Unless you install two gt28rs's



Variable geometry turbos are used in the new porsches...
Sounds like a sweet project!
And if you did it... You'd be a god.

 

So what should he do buy a new 911 turbo and dismantle it? that is why I said VTG turbos aren't really a possibibility.

 

You'll have less power overall. What year is the 740?

 

One would have to assume that it is a spare part especially with how often the rear mounted engine cars need turbo's replaced. I'm guessing it's not a cheap option, but one nonetheless?