This is probably heresy but... - Page 2

Redstar · 09-19-2008, 11:44 AM

Not twin turbo, twin charged – supercharged and turbo charged! I think it’s the VW Polo that’s factory twincharged, and there have been more than a few mini’s that ended up twincharged.

I'd kinda wondered if anybody had tried fitting a jackson racing supercharger kit from a honda or miata to an MR2...

It’s my understanding that centrifugal superchargers were originally designed to be used on engines that spent most of their life in a narrow rpm window. They are popular today on passenger vehicles because of their installation simplicity and the way they add boost - (typical of a properly sized system) Low to mid rpm operation sees minimal boost, meaning fuel economy is not effected much and detonation is easier to keep in check. Keep revving the engine and ideally once VE starts falling off the supercharger really starts adding boost, kind of like VTEC on steroids if you will.

While its not turbo lag, and there is some boost generated in lower rpm ranges, the centrifugal systems I’ve seen provide full boost close to redline. While this can be great for a daily driven car I think it blows for performance on a 4 cylinder. I want my boost to kick in asap, not at 5,000rpm when I’m starting to think about shifting.

My opinion in short: centrifugal superchargers are nothing more than crank driven turbo’s that spool late.

I’ll leave the centrifugal subject alone now. Let us know what form of FI you decide to go with!

Scion Tc - The Great Debate Supercharger Or Turbocharger - Turbo Magazine
Supercharger Overview - Tech - Sport Compact Car Magazine
Centrifugal type supercharger - Wikipedia, the free encyclopedia

Medusa · 09-19-2008, 12:30 PM

^ Thanks for the links!

The more and more I think about it, positive displacement seems the way to go. My problem now is just money....and finding a system that is even remotely compatible.

Redstar · 09-19-2008, 02:13 PM

eBay Motors: FORD FOCUS JACKSON RACING SUPERCHARGER SYSTEM 2000-2002 (item 140267263106 end time Sep-21-08 17:01:39 PDT)

?

1stgen · 06-12-2009, 09:31 PM

I came across this thread in my meanderings. and thought to revive it.. with this link i also found..Twin CHarging Project <<not mine I have recently picked up a mk1 supercharger for cheap and am thinking of ways to cram it in my engine bay. and run a twin charger...

TomsMR2 · 06-13-2009, 01:10 AM

twin charging made sense in the 80's when turbos were terrible, and superchargers were terrible. you kinda removed the worst of both and were left with the bad of both.

you can now pump 400whp, efficiently, out of a single supercharger.

1stgen · 06-13-2009, 01:15 AM

TomsMR2 · 06-13-2009, 02:51 AM

i had an M45 eaton supercharger from a mini for a while. it'll fit on the engine. the aftermarket M45's will fit even better, and the newer 1.0L twinscrews will very easily fit.

its really not *that* much work. if you have a welder and something to cut metal, you could bang it out pretty quick. id run it right on top, and preferably off the timing belt.

Medusa · 06-17-2009, 04:11 PM

Holy thread revival batman!

Haha how funny. All these months later and I still love the idea of supercharging. But I think I really will end up with a 5S-FTE eventually, it is more economical, i.e. more power for my money and time.

06-13-2009, 01:15 AM	#26 (permalink)
1stgen Yup Join Date: Aug 2008 Location: Central Coast CA Posts: 383 Thanks: 11 Thanked 12 Times in 11 Posts My Google Map iTrader Rating: (1/100% )	yup

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09-19-2008, 11:44 AM	#21 (permalink)
Redstar My other cars are jealous Join Date: Feb 2007 Location: Bellingham, WA Posts: 396 Thanks: 18 Thanked 38 Times in 27 Posts iTrader Rating: (10/100% )	Not twin turbo, twin charged – supercharged and turbo charged! I think it’s the VW Polo that’s factory twincharged, and there have been more than a few mini’s that ended up twincharged. I'd kinda wondered if anybody had tried fitting a jackson racing supercharger kit from a honda or miata to an MR2... It’s my understanding that centrifugal superchargers were originally designed to be used on engines that spent most of their life in a narrow rpm window. They are popular today on passenger vehicles because of their installation simplicity and the way they add boost - (typical of a properly sized system) Low to mid rpm operation sees minimal boost, meaning fuel economy is not effected much and detonation is easier to keep in check. Keep revving the engine and ideally once VE starts falling off the supercharger really starts adding boost, kind of like VTEC on steroids if you will. While its not turbo lag, and there is some boost generated in lower rpm ranges, the centrifugal systems I’ve seen provide full boost close to redline. While this can be great for a daily driven car I think it blows for performance on a 4 cylinder. I want my boost to kick in asap, not at 5,000rpm when I’m starting to think about shifting. My opinion in short: centrifugal superchargers are nothing more than crank driven turbo’s that spool late. I’ll leave the centrifugal subject alone now. Let us know what form of FI you decide to go with! Scion Tc - The Great Debate Supercharger Or Turbocharger - Turbo Magazine Supercharger Overview - Tech - Sport Compact Car Magazine Centrifugal type supercharger - Wikipedia, the free encyclopedia

09-19-2008, 12:30 PM	#22 (permalink)
Medusa Cage Fighter Join Date: Sep 2008 Location: Reno, NV Posts: 627 Thanks: 9 Thanked 10 Times in 10 Posts iTrader Rating: (0/0% )	^ Thanks for the links! The more and more I think about it, positive displacement seems the way to go. My problem now is just money....and finding a system that is even remotely compatible.

09-19-2008, 02:13 PM	#23 (permalink)
Redstar My other cars are jealous Join Date: Feb 2007 Location: Bellingham, WA Posts: 396 Thanks: 18 Thanked 38 Times in 27 Posts iTrader Rating: (10/100% )	eBay Motors: FORD FOCUS JACKSON RACING SUPERCHARGER SYSTEM 2000-2002 (item 140267263106 end time Sep-21-08 17:01:39 PDT) ?

06-12-2009, 09:31 PM	#24 (permalink)
1stgen Yup Join Date: Aug 2008 Location: Central Coast CA Posts: 383 Thanks: 11 Thanked 12 Times in 11 Posts My Google Map iTrader Rating: (1/100% )	I came across this thread in my meanderings. and thought to revive it.. with this link i also found..Twin CHarging Project <<not mine I have recently picked up a mk1 supercharger for cheap and am thinking of ways to cram it in my engine bay. and run a twin charger...

06-13-2009, 01:10 AM	#25 (permalink)
TomsMR2 Formerly Tom Brokaw Join Date: Feb 2005 Location: Bay Area Posts: 2,497 Thanks: 8 Thanked 233 Times in 168 Posts Blog Entries: 1 iTrader Rating: (0/0% )	twin charging made sense in the 80's when turbos were terrible, and superchargers were terrible. you kinda removed the worst of both and were left with the bad of both. you can now pump 400whp, efficiently, out of a single supercharger.

06-13-2009, 02:51 AM	#27 (permalink)
TomsMR2 Formerly Tom Brokaw Join Date: Feb 2005 Location: Bay Area Posts: 2,497 Thanks: 8 Thanked 233 Times in 168 Posts Blog Entries: 1 iTrader Rating: (0/0% )	i had an M45 eaton supercharger from a mini for a while. it'll fit on the engine. the aftermarket M45's will fit even better, and the newer 1.0L twinscrews will very easily fit. its really not that much work. if you have a welder and something to cut metal, you could bang it out pretty quick. id run it right on top, and preferably off the timing belt.

06-17-2009, 04:11 PM	#28 (permalink)
Medusa Cage Fighter Join Date: Sep 2008 Location: Reno, NV Posts: 627 Thanks: 9 Thanked 10 Times in 10 Posts iTrader Rating: (0/0% )	Holy thread revival batman! Haha how funny. All these months later and I still love the idea of supercharging. But I think I really will end up with a 5S-FTE eventually, it is more economical, i.e. more power for my money and time.