What dizzy for my build?

[mb911]

I am building a 2.4 with 2.2 s pistons, Solex cams, and webers. I currently have a 0 231 159 006 Dizzy that looks to be for a 2.2 E.. I am looking for some feedback as to if this would be an acceptable Distributor for my needs or if it needs to be recurved?

Thanks

[Sigurd]

I do not know if this is available from our host:

123Ignitionusa, LLC - Search Results for "Porsche 911"

[kenikh]

E dizzy curve should be fine. That's a lot of compression for single plug, though.

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[Plays with cars]

I'd grab one out of a 2.4l motor instead of a 2.2l. The 2.4 has a slower advance rate which would be good for higher compression and single plug. The T, E and S have different distributor part numbers but the curves are the same; the only difference is the rev limit set point on the rotor (which is replaceable and interchangeable). Save yourself some money and buy one for a 'T'.

I built a similar motor (2.4, E cams, 2.2S pistons, single plug) and am using the 2.4l advance curve with good results. (butt dyno results only)

[mb911]

Thanks everyone I think I will stick with the E dizzy I currently own. Henry@supertec says it will be perfect.

[Henry Schmidt]

One quick thought.
If the case is 72 or later the distributor mounting hole is 30mm vs the 27mm of the 2.2 distributor.

[mb911]

Originally Posted by Henry Schmidt

One quick thought.
If the case is 72 or later the distributor mounting hole is 30mm vs the 27mm of the 2.2 distributor.

Oops you are right the distributor is on its way to you with some repaired 226 fan rings

[Henry Schmidt]

Originally Posted by kenikh

E dizzy curve should be fine. That's a lot of compression for single plug, though.

Hi Kenikh
I assume your concern (high compression) is based on the assumption that the 2.2S pistons on a 70.4 crank will produce a compression ratio in excess of 10:1.
That assumption has been floating around the Porsche community for decades.
The truth is, 2.2 S pistons don't produce anything like their advertised compression ratio (9.8:1).
In fact, when properly measured the static compression on all early factory pistons is considerably lower than the published number.

2.2S 9.8:1 crazy!
Actually measure at closer to 8.5:1