Supercharger for a 1986 944 NA

[uvachief]

Anyone installed a supercharger kit for a 85.5 to 87 944 NA? If so, what were the results? Which brand and from whom did you purchase it? What else did you have to do besides installing it? What sort of tuning was required?

[krystar]

there is no prefabbed supercharger kit for 8v NA.

[BryO]

See if this works for you.

Porsche 996 twin turbo parts & goodies

[fiat22turbo]

I have an Eaton supercharger off of a Mercedes 230 for sale if you'd like to try your hand at fabricating an installation for your car.

You'll need to fabricate a mount, pulleys and tubing for it. Nice and compact unit.

Mercedes Supercharger (Kompressor) | eBay

Should be good to about 10psi at 14,000rpm (blower max speed)

[uvachief]

Originally Posted by fiat22turbo

I have an Eaton supercharger off of a Mercedes 230 for sale if you'd like to try your hand at fabricating an installation for your car.

You'll need to fabricate a mount, pulleys and tubing for it. Nice and compact unit.

Mercedes Supercharger (Kompressor) | eBay

Should be good to about 10psi at 14,000rpm (blower max speed)

I'll look at it but I doubt it will work. Did the Cogsworth series have a supercharger? That might work.

[Eric_Oz_S2]

Engines are so cheap over there - you would be better just getting a used S2, 968 or Turbo Engine - they would all be faster than a supercharged NA.

Eric

[blown 944]

I'm not sure I'd agree with the s2 or 968 engine outperforming a supercharged 2.5. I made a "true" 250 rwhp which translates to over 280 on a Dyno generally and I tuned a 968 to 210 rwhp Dyno hp. My sc car was absolutely faster.

Engines are so cheap over there - you would be better just getting a used S2, 968 or Turbo Engine -they would all be faster than a supercharged NA.



Eric

[blown 944]

Also the Mercedes blower is not the best choice due to the clutch pulley setup. It is too large for the current pulley ratio. A guy tried to use on on a 2.5 Subaru and had to machine a dinner plate sized lower pulley. Just an FYI

[Racker]

Hey guys, I have a mostly complete superchargers of knoxville kit with intercooler option. The cool thing about this kit is you retain your a/c. I'm in the middle of a move now, but I can post some pics late next week after I am done.

Rick

[advantagedent]

speed force racing makes a kit for you iam thinking of gettting 1 for my s2

[fiat22turbo]

Originally Posted by uvachief

I'll look at it but I doubt it will work. Did the Cogsworth series have a supercharger? That might work.

?? what's a Cogsworth series?

Why don't you think it will work?

A supercharger is a stupid simple device, just spin it quickly and point the outlet to the inlet of your engine, add fuel and alter timing curve and enjoy.

Turbochargers are even more simple since they are driven by the exhaust.

[fiat22turbo]

Originally Posted by blown 944

Also the Mercedes blower is not the best choice due to the clutch pulley setup. It is too large for the current pulley ratio. A guy tried to use on on a 2.5 Subaru and had to machine a dinner plate sized lower pulley. Just an FYI

So, don't use the clutch pulley and machine a smaller one. The clutches are $400 new from the dealer and they fail all the time. Ditch them and add a bypass valve in the tubing.

Speed Force Racing does still have the kits available:

Speedforceracing.com

$4495 for a Stage 1 @6psi and 182hp

$5495 for a Stage 2 @8psi and 222hp (seems like a lot of money for a 951 intercooler, 951 injectors, different pulley and shorter belt to get 8psi)

[Eric_Oz_S2]

Originally Posted by blown 944

I'm not sure I'd agree with the s2 or 968 engine outperforming a supercharged 2.5. I made a "true" 250 rwhp which translates to over 280 on a Dyno generally and I tuned a 968 to 210 rwhp Dyno hp. My sc car was absolutely faster.

Is that with stock internals? You would need to be running 11psi + boost to get that output. I can't see the stock engine with its cast pistons handling that for any length of time. My S2 is faster around the track than a standard 944 Turbo by quite a way due to the extra torque out of corners. The 968 is faster again.

[blown 944]

It was an early model using forged pistons and rods. My current build us using the same setup with the addition of a milled turbo head. I could certainly see you beating stock turbos. However, with any pressure at all in the manifold these 2.5's are very torquey. I think you may be mislead by the turbos performance in comparison. Honestly an NA is probably faster out of the corners due to the lower compression and horrible 2d timing maps in the turbo.

Quote de blown 944

I'm not sure I'd agree with the s2 or 968 engine outperforming a supercharged 2.5. I made a "true" 250 rwhp which translates to over 280 on a Dyno generally and I tuned a 968 to 210 rwhp Dyno hp. My sc car was absolutely faster.

Is that with stock internals? You would need to be running 11psi + boost to get that output. I can't see the stock engine with its cast pistons handling that for any length of time. My S2 is faster around the track than a standard 944 Turbo by quite a way due to the extra torque out of corners. The 968 is faster again.

[blown 944]

Yeah that would be a good solution. I just didn't want the OP to be mislead regarding boost etc...

Quote de blown 944

Also the Mercedes blower is not the best choice due to the clutch pulley setup. It is too large for the current pulley ratio. A guy tried to use on on a 2.5 Subaru and had to machine a dinner plate sized lower pulley. Just an FYI

So, don't use the clutch pulley and machine a smaller one. The clutches are $400 new from the dealer and they fail all the time. Ditch them and add a bypass valve in the tubing.



Speed Force Racing does still have the kits available:



Speedforceracing.com



$4495 for a Stage 1 @6psi and 182hp



$5495 for a Stage 2 @8psi and 222hp (seems like a lot of money for a 951 intercooler, 951 injectors, different pulley and shorter belt to get 8psi)

[uvachief]

Originally Posted by fiat22turbo

So, don't use the clutch pulley and machine a smaller one. The clutches are $400 new from the dealer and they fail all the time. Ditch them and add a bypass valve in the tubing.

Speed Force Racing does still have the kits available:

Speedforceracing.com

$4495 for a Stage 1 @6psi and 182hp

$5495 for a Stage 2 @8psi and 222hp (seems like a lot of money for a 951 intercooler, 951 injectors, different pulley and shorter belt to get 8psi)

I'm better off buying a 951 and restoring it at that cost!

[fiat22turbo]

Originally Posted by uvachief

I'm better off buying a 951 and restoring it at that cost!

Well, now you know why there are so few off-the-shelf kits around!

Seriously, do some reading (outside of the Porsche world) and determine what size blower would work best for your engine and space, acquire it, build the mounting brackets, pulleys, etc. Pretty simple calculations and fab work for an experienced fabricator.

You'll likely have to run a MegaSquirt PnP to deal with the addition of boost to the stock EFI system, etc.

[Cocacolakidd]

Because a Supercharger does not have the spool-up time involved the motor is making more torque at lower speeds. A supercharged 944 makes more torque than an NA or even a Turbo. My M44/52 ('89 turbo Block) with the forged 8:1 compression turbo pistons is able to make 16psi boost, at 5.5K Rpm, and that relates to 300 Hp at the rear wheels with 72 lb. injectors. At the higher boost levels the Supercharger is heating the intake air to the point that an intercooler is a must (Even the Turbocharger heats the intake air and that's why Porsche put the intercooler on the turbo versions). Because the Supercharger is turned by a belt, driven by the motor, they are even making boost at lower speeds even in city traffic.

Most have found that the Eaton M-90 Supercharger, from a Ford Thunderbird Super Coupe, is the most easily adapted Supercharger for the 944.

Eaton M-90 Supercharger, custom mounts, custom Supercharger Pulley, Custom Idler Pulley (Optional), 6 rib serpentine belt to size, Turbo DME & KLR, Turbo Wiring Harness, Adjustable Fuel Pressure Regulator, Piggy Back Fuel Controller, 55 lb. or larger fuel injectors, Air/fuel Ratio Gauge, intercooler, air pipes to and from Supercharger, a MAF system, and AC Delete (a must for fitment).

Have pfun -

[billy mild]

Originally Posted by Racker

Hey guys, I have a mostly complete superchargers of knoxville kit with intercooler option. The cool thing about this kit is you retain your a/c. I'm in the middle of a move now, but I can post some pics late next week after I am done.

Rick

My dad has a picture of one of these cars. They are pretty bada$$. They would make about the same power as a turbo, but also have power from off idle to the upper RPM's. Where did you get it and POST PICTUREs.