Grant:
martini964:

I wanted to backdated to 73rs,but 3.8 or 4.0

I am considering a large displacement motor for my 73, but while much stronger, the larger motors are not quite as quick to respond with the feeling of a weightless flywheel.  Still trying to decide...

These types of intakes/fuel-injection (6 throttles) help a bunch with making the large motors feel more lively - something that Singer does with their more expensive motor builds:

http://www.rothsport.com/Products/Engine/Fuel-Injection-Systems/FI-Systems.htm


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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

 

 

I used something like that http://www.clewett.com/index.php?main_page=product_info&cPath=2_56&products_id=399&zenid=689d51f16a63349e2a4bc2e1b2d6f9a0 The Clewwtt / Electromotice EFI with individual throttle bodies etc. Changed the stacks to full radius etc. The jump to full slide vales was just a little too much money at the time but it was a great (and very reasonable cost wise) solution. Had little problems (other than longevity) with taking the engine into the 5 figure RPM range. The 3.0 litre made 385hp but it was a real race engine.

A 3.2 Short Stroke is a nice driving engine and I've seen 3.2 super short strokes (77 Turbo case, 100mm pistons, 66mm crank) which looked really fun. 


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Past-President, Porsche Club of America - Upper Canada Region