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Supercharging a 944 - Why so hard?

 
Old 12-13-2017, 07:04 AM
  #121  
924srr27l
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Originally Posted by jderimig View Post
^ Like. I will search.

We have a manufacturer in the UK called BRISE who do smaller Alternators....

http://www.brise.co.uk/Alternators/

I fitted one on my 924 to lose weight over the large heavy stock one and bracket, but it also free's
up the space around this area..




R
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Old 12-13-2017, 10:17 AM
  #122  
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^^ Those are nice alts, but I'd prefer search for a cheaper solution firstly....

Edit: This one looks good and its chromed!
http://www.topstreetperformance.com/...BoCoCQQAvD_BwE
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Old 12-13-2017, 11:05 AM
  #123  
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there are plenty of compact, OEM-type alternators available here with a little bit of leg work available new from our auto supply stores for the equivalent of ~50 GBP.
i do fully agree that the 944 could use an "alternator diet" as the stock unit is an underperforming, oversized monster compared to more modern units.

Originally Posted by 924srr27l View Post
We have a manufacturer in the UK called BRISE who do smaller Alternators....

http://www.brise.co.uk/Alternators/

I fitted one on my 924 to lose weight over the large heavy stock one and bracket, but it also free's
up the space around this area..
R
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Old 12-13-2017, 11:06 AM
  #124  
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Originally Posted by ealoken View Post
Why dont you guys just use a stock 951 cooler? It fits right in the nose, and will do the job for your SC engines
i will be using a modified 951 unit.
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Old 12-13-2017, 06:25 PM
  #125  
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Thats what I would have done, but my car was an 84 so access to that area was zero.
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Old 12-13-2017, 06:57 PM
  #126  
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If anybody wants to give this a shot, my Jaguar XJR "short-snout" M90 is not going to be needed so it is up for sale.
This one is rarer than the Ford version I am using, it is about 2.5" shorter overall so will be easier to package.

Good used condition, ready to bolt on and go (could use a cleaning though).
I need $300 to break even (that's what I paid the dismantler who removed it from the running but wrecked Jaguar)

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Old 12-13-2017, 07:28 PM
  #127  
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Interesting thread. While I am not Supercharging a Porsche. I have done a good amount of work on doing the same to Honda 1976 GL1000 Goldwing motorcycle. That project is ‘sorta’ stalled right now, but that is only from my own laziness. I went out to my shop today and looked at all the parts I have collected to date, and my build binder. This thread may help get me back on the road to finishing that project, I really do hope so. I noted a few posters mentioned the Rotrex brand. That is the S/C brand I went with on my project, a C15-60 to be exact. Its sweet ‘spot’ is in the 90 - 240 HP range. I was going for 100 - 125 HP, low RPMs on the actual S/C, so well within its limits. I won’t post any data here, I think that is a little off topic for this thread. However, a book I would highly recommend for anyone wanting to do such a S/C project is ‘Supercharged’ by Corky Bell. I will be following this thread and I may interject if I feel I can add something technical to the conversation.
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Old 12-13-2017, 10:01 PM
  #128  
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An idea I had a few years ago was to run the blower off the balance shaft cog. Machine a balance shaft pulley to fit the shaft of the blower. 2:1 cogged ratio, no slip. My car has the balance shafts deleted so it seemed viable in my case.
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Old 12-14-2017, 03:11 AM
  #129  
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Originally Posted by sctanton52 View Post
Interesting thread. While I am not Supercharging a Porsche. I have done a good amount of work on doing the same to Honda 1976 GL1000 Goldwing motorcycle. That project is ‘sorta’ stalled right now, but that is only from my own laziness. I went out to my shop today and looked at all the parts I have collected to date, and my build binder. This thread may help get me back on the road to finishing that project, I really do hope so. I noted a few posters mentioned the Rotrex brand. That is the S/C brand I went with on my project, a C15-60 to be exact. Its sweet ‘spot’ is in the 90 - 240 HP range. I was going for 100 - 125 HP, low RPMs on the actual S/C, so well within its limits. I won’t post any data here, I think that is a little off topic for this thread. However, a book I would highly recommend for anyone wanting to do such a S/C project is ‘Supercharged’ by Corky Bell. I will be following this thread and I may interject if I feel I can add something technical to the conversation.
Here is my friend Harald`s ch550sc
Running microsquirt ++++

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Old 12-14-2017, 05:20 PM
  #130  
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Originally Posted by ealoken View Post
Here is my friend Harald`s ch550sc
Running microsquirt ++++
That is cool, a very nice job of mounting and plumbing.
If I can find some old pics I will post how the Rotrex S/C is being mounted on a Flat-Four GL1000. I am runing, or will be, Jenvey Injector Throttle Bodies. Then come out of the UK and are a TB replacement for Webber Carbs. I think they go 2-Bar+ in the specs, but my boost is planned to be way less than that.
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Old 12-18-2017, 10:26 AM
  #131  
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Looking into intercooling options. Looking at these a2w barrel units. Seems appealing to me from the space saving and possibly simpler air ducting. The water loop part doesn't bother me. For the power and boost I am looking for these compact units might work. Any comments on this approach?

Pictures is 4" diameter total length around 11". From frozenboost.com I think I could fab this to fit in the space that the j-boot and throttle body now occupy.


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Old 12-18-2017, 10:54 AM
  #132  
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Thaose are really nice looking units. I presume that the inlet and outlets are about 2" since the total diameter is only 4"..Keep us posted! Thanks!
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Old 12-18-2017, 11:08 AM
  #133  
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When you go to start fabbing stuff up you'll realize how little space there really is under a 944 hood.
I've looked long and hard at those AWICs, barrel types, the boxy types, even thought about making my own. It'd package so much better without all the air piping.
But those things sure seem bigger than they really are when you try to stuff them into a car..

I think you could fit one of those if you designed the entire system around fitting it, if that makes sense.
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Old 12-18-2017, 11:16 AM
  #134  
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Originally Posted by V2Rocket View Post
When you go to start fabbing stuff up you'll realize how little space there really is under a 944 hood.
I've looked long and hard at those AWICs, barrel types, the boxy types, even thought about making my own. It'd package so much better without all the air piping.
But those things sure seem bigger than they really are when you try to stuff them into a car..

I think you could fit one of those if you designed the entire system around fitting it, if that makes sense.
You can use a BMW Water IC. ( 13717575406/405 )
Water cooler where the oem ic is placed.

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Old 12-18-2017, 11:21 AM
  #135  
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Originally Posted by V2Rocket View Post
When you go to start fabbing stuff up you'll realize how little space there really is under a 944 hood
You are so right. I have taken stuff off and laying in parts.

I am going to print a model of the barrel unit and see where it can go under the hood.

BTW I have my aluminum "foundry" going and plan on casting custom pieces to get things to fit.
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