Go Big or Go Home: Clay's 914-6, MS3Pro Wiring in Progress Options

[ClayPerrine]

@ClayPerrine
@mepstein

Would this flat alternator belt work on a 911? I have the high output alternator with standard V-belt and was wondering if the flat belt with tensioner would be better.

Jerry,

Yes, the serpentine belt conversion will work with the high output alternator. Clewett engineering even makes an underdrive belt kit to increase the fan/alternator speed.

Here's the link to their page: https://www.clewett.com/index.php?main_page...ex&cPath=60

Clewett's kits were designed for the 911, and the tensioner had to be slightly modified for use with a 914. I know there was a recent thread on it, but I don't have it handy. The tensioner attaches to the 911 motor mount on a part that is not present in the 914 motor mount. Clewett redesigned the tensioner, and I have not seen the new design, so that may not be true any more.

I hope that helps.

@ClayPerrine

Thanks Clay. I reached out to Clewett to see which kit would work with my '86 930 turbo. I don't like the tensioned V-belt with the high output alternator. Plus the high output alternator has to spin at a higher minimum speed than the OEM alternator else it won't generate enough voltage to keep the system voltage above 13V.

@spoke I thought this was for a 914-6 conversion. If it is on a 930, then it should work great. If you need extra speed, get the underdrive kit. I would always suggest it here in Texas for the additional cooling, but it also helps increase the low speed charging.

[ClayPerrine]

So I am finally getting back to working on the new EFI system for my 914-6 conversion.

I am finishing up the new relay box for the MS3Pro.





This goes in the same location as the factory relay board. It has fuses and 6 relays for the EFI, the baro sensor, and a 14 pin connector to hook it to the rest of the harness.

I stopped because I have to go get loop connectors for the ground leads and for the power connections. I also need to get a new 14 pin connector. That one is broken and glued back together.

[mate914]

Clay,
Engine looks so 917teenish.
I think your engine is F*&KI$$ awesome!
Matt (IMG:style_emoticons/default/flag.gif)

[mepstein]

Still wondering if the alternator bumps against the firewall. (IMG:style_emoticons/default/poke.gif)

[ClayPerrine]

Still wondering if the alternator bumps against the firewall. (IMG:style_emoticons/default/poke.gif)

So am I. My plan is to use a modern GM 300 amp Hairpin style computer controller alternator and put it low on the right where the distributor was, but I am not sure if it will clear the firewall or not.



I am going to run it from the same serpentine belt as the fan, so if the belt breaks, I get a generator light that tells me before the engine overheats.

The alternator will be controlled by the MS3Pro ECU to only put out the amperage needed. But I have to have the amperage to run the Electric AC compressor, so I have to go with something stout.

[mepstein]

I had bought a supercharger that went into the same space as your alternator but there was no way to fit it in the 914. There is a bump out for the fan but then the metal moves back to the engine.

[ClayPerrine]

I had bought a supercharger that went into the same space as your alternator but there was no way to fit it in the 914. There is a bump out for the fan but then the metal moves back to the engine.

I hope you are wrong, but if not, then I will add a dimple for the alternator pulley.

[Shivers]

This is Steve McQueen cool, Clay