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Archive for January, 2013

Project complete – for now.

January 24, 2013 9 comments

It’s been a long time since posting, mainly due to my laziness than any lack of progress with the car.  The car is now road going and it’s probably got around 1300kms on the motor.  Here are some pics with a bit of a rundown.

Believe it or not but it sounds better than it looks.

Ready to drive

Close up

More close ups

Another close up

When I first collected the car with motor installed I was a bit nevous.  It was smokey, hard to start, felt a bit flat and certainly running very rich.  There were lots of issues with it sneezing out the carbs so larger idle jets were installed (hence the richness).

It was left in that state of tune while it was sealing itself during run in.  Progressively the smokiness reduced but the other symptoms were there.  When I hit 1000km’s it was straight back to the mechanic for it’s service.  New oil and all other adjustments made and it certainly was running better.  The original idle jets were reinstalled. The decision was then made to set it up on the dyno and so I booked in with Melbourne Performance Centre.

I explained to them the flat spot around 2500, the popping throughout various points in the rev range and what I thought was a lazy acceleration up until about 4000.

The results were significant.  Sneezing is virtually gone (always a compromise but I opted for the odd sneeze at around 1200 in favour for a better mixture higher in the rev range.  I now have about double the power around 1500 rpm which explains the sluggish starts I was experiencing.  Top end power is about 17KW more at the wheels and really gets going about 4200.  Peak power at about 6200.  There is loads of torque and the curve is quite flat.  the result is a very strong motor that pulls early in the gear.  It revs very freely and before I know it it is ready for the change up.

On the dyno the power numbers seemed a touch lower than expected  but torque was 384Nm at the wheels. Needless to say I am very happy with it.  Phil and Darren at Auto Coupe have done a great job putting it together.

All focus on the engine but the 915 shifts nicely.  With the Rennshift fitted it’s a positive shift and might swing any 915 doubter into a fan.

Enough for now.  I plan to do a proper photo shoot of the car – inside and out.  I’ll also follow this up with a series of before and after pics.

Thanks for reading

Categories: 911SC