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jmz jmz is online now
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Join Date: Feb 2003
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thinking of going to a 3.2 Short Stroke. Questions

I have a nice running low mileage 3.0 with Mod S cams, 9.3:1 C.R., webers and some mild port work. It is pretty healthy and dynoed at 212 RWHP last time around.

I am thinking about putting some 98mm p/c and bumping the compression up to about 9.8:1 possibly going to 10.3:1. The heads are twin plugged already, I just need the ignition stuff.

Is it feesible to do this and not split the case again?

How much H.P. and torque should I hope for by bumping up to a 3.2 S.S. and adding 1/2 or 1 whole point of compression?

I am guessing around 20 extra h.p. and hoping that the extra compression improves the grunt (torque) as well.

T.I.A.

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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud)
'70 914/6 Race Car (Faster and Louder)
'71 73RSR tribute vintage race car 3.0
'68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox
'81 Magenta IROC clone in progress 3.6 varioram/G50
Old 12-20-2005, 03:13 PM
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jmz jmz is online now
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bump for the Lunch crowd
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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud)
'70 914/6 Race Car (Faster and Louder)
'71 73RSR tribute vintage race car 3.0
'68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox
'81 Magenta IROC clone in progress 3.6 varioram/G50
Old 12-21-2005, 09:14 AM
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250 hp no problem

what is the use of the car? and if more than 1 use, how much % of each -- that will determine how aggresive the camming should be.
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Old 12-21-2005, 12:39 PM
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Randy,
I think I'll use the cams that I already have in my current engine. They are Elgin Mod S. In fact, I think I'll leave everything the same and just slip in the 98 mm p/c while at the same time bumping the compression up from the 9.3:1 to the twin plug range of things ...around 10:1 or so.

I am curious how much h.p. this alone will add to the car.
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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud)
'70 914/6 Race Car (Faster and Louder)
'71 73RSR tribute vintage race car 3.0
'68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox
'81 Magenta IROC clone in progress 3.6 varioram/G50
Old 12-21-2005, 02:24 PM
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Have you done your 3.2 conversion yet? Thinking of doing the same. Dyno yet? Rough costs? Thanks!
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Old 01-28-2006, 04:11 PM
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last post was only one month ago. I'd be pretty quick if it were done already.

not sure when/if it will happen.

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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud)
'70 914/6 Race Car (Faster and Louder)
'71 73RSR tribute vintage race car 3.0
'68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox
'81 Magenta IROC clone in progress 3.6 varioram/G50
Old 01-29-2006, 06:49 AM
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