924Board.org

joewest · Joined: 06 Oct 2005 Posts: 234 Location: Portland, OR

Hi all,

Just quick update on the project. Lots of small tidy-up items to complete before sending it off to the dyno shop. Even poorly tuned, the throttle response and pull is awesome! I will post an in car drive video once a few more bits get put on.

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'79 924 Supercharged / Track Prepared
'80 931 Daily Driver - Sold
"The number of posts in my profile may represent the number of times I have screwed something up...and admitted it here."

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Looks quite nice
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80 Turbo - Slightly Modified

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

Awesome setup, we need videos of this thing!
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https://www.the924.com

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11723 Location: PacNW

Portland, Oregon = Home of the Coolest Toofahs!

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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Mike9311 · Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish

Nice! So clean! An inspiration

Can I ask what you used for the firewall insulation? Harder to find something like this in silver rather than gold
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

924RACR · Posted: Fri Aug 19, 2022 11:50 pm Post subject:

Lots of great options here, reasonable prices, I use this stuff a lot on my prototype...
https://www.designengineering.com/products/heat-control/
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

jacobroufa · Joined: 18 Nov 2016 Posts: 531 Location: Belvidere, IL

Wow Joe! What a sweet project!

I am almost to the point where I will want to reach out and discuss my own Microsquirt-run supercharged 924. I'm using a slightly different approach than you with a different charger and keeping the CIS, but going with FrankenCIS firmware and eWUR for complete control. I will also be using an EDIS timing setup.

I would love to compare our setups more in depth!
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1980 Porsche 931
1981 Porsche 924 Weissach

joewest · Joined: 06 Oct 2005 Posts: 234 Location: Portland, OR

Vaughan linked the exact product I used. Heat Screen self-adhesive and get a roll of the matching tape to finish the edges. I bought it from Summit Racing. Running this material and the OE rubber seal at the top of the firewall WITH the belly pan and splitter has reduced the engine bay temperatures a bit. This was before these significant mods for which I have no data to verify if this is still the case.

Hit me up Jacobroufa. What you describe is quite different, but I may have a few "lessons learned" than could save you headaches. The megasquirt is epic once working. SO much flexibility and no more CIS hard starts. Fires up perfectly after a hard run and heat soaking.

I fixed the serpentine belt alignment issue (see engine bay image in earlier post) this AM and should be able to post a video this weekend. Notice the "jumped" belt! The alternator slid back in its adjustable mounting bracket and took the belt with it by one rib.
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'79 924 Supercharged / Track Prepared
'80 931 Daily Driver - Sold
"The number of posts in my profile may represent the number of times I have screwed something up...and admitted it here."

924RACR · Posted: Sat Aug 20, 2022 5:28 am Post subject:

peterld · Posted: Mon Aug 22, 2022 7:38 pm Post subject:

Lovely execution Joe. Absolute credit to you.
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80/81 932/8 ROW

joewest · Joined: 06 Oct 2005 Posts: 234 Location: Portland, OR

Thanks for the kind words guys!

Here is a very short (and not very exciting) video of my testing the serpentine belt issue fix:

https://youtu.be/EHFiANvuXNM

Lots of tuning to do this weekend to address the dip when the throttle opens and to add an over-run safety. Then I would like to do more data logging and wide open throttle pulls.
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'79 924 Supercharged / Track Prepared
'80 931 Daily Driver - Sold
"The number of posts in my profile may represent the number of times I have screwed something up...and admitted it here."

FoundSoul · Joined: 13 Sep 2022 Posts: 4 Location: Gainesville, GA

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Heyyy.. Welcome to the board!
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80 Turbo - Slightly Modified

FoundSoul · Joined: 13 Sep 2022 Posts: 4 Location: Gainesville, GA

Thanks man!
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Jerry Hoffmann aka 'FoundSoul'
Founder/Owner DIYAutoTune.com and AMPEFI.com
Equal Opportunity Car Junkie

The DIY EFI Tuners Guide – How to Install, Configure, and Tune EFI!

joewest · Joined: 06 Oct 2005 Posts: 234 Location: Portland, OR

Hi Jerry,

Welcome to the board!

I would love to provide any information about the build to support your efforts on your writing project. I particularly love the fact that there is an acronym glossary, which i believe will reduce barriers for us all.

Currently, I am fixing a serpentine belt vs. alternator alignment issue this weekend but should be off to the dyno shop to see some actual data shortly. TunerStudio shows that there is about 2.34lbs of boost at 6500RPM (MAX) with the stock pulley on the supercharger. A nice safe place to start tuning and experimenting with pulley diameters.

Keep in touch!
_________________
'79 924 Supercharged / Track Prepared
'80 931 Daily Driver - Sold
"The number of posts in my profile may represent the number of times I have screwed something up...and admitted it here."