Black Betty - Part 3 Engine rebuild
03-18-2013, 10:37 AM
#467
Just doing all the catch up on everyone's toys... Congratulations Frank. Looking very good indeed. Love it when a plan comes together. Betty lives and probably breathes fire. So glad she's gonna be ready. Question is will you? I really hope the arm heals in time.
03-18-2013, 11:11 AM
#468
Drifting
Thread Starter
The dyno is used by Porsche Club GB for all their race cars - no funny business with optimistic read outs.
Twas only a minute chat but atm we're seeing 340+ with a hot engine.
Suspect closer to 350 on open road, cool conditions. Absolute bags & bags of torque low down. Todays plot coming soon.
Nick suspects around a 15hp max increase with the flat slides due to injector location etc at the top end. So this is a very preliminary read out. Once the flat slides are ready the car will go back up and we'll get the final figures.
Edit as I collect my thoughts: Nick says she moves like a rock. That no matter where you are in the rev range she just shunts you in the back and goes with brute force. It's just constant power at all times no waiting till revs build up.
Am very excited to get my impressions and see where we end up with the flat slides....
All in all we'll see how I feel with the way she works - from there we'll asses the whole development and see if we continue developing with different cams etc.
Something tells me that once it's all done - it'll be devastatingly effective/ monstrous.
Read out coming soon.
Cheers mate, hope you're ready in time also! Wrist is getting better by the day - just a bit stiff now
03-18-2013, 11:23 AM
#469
Nordschleife Master
Join Date: Feb 2011
Location: Deep Downtown Carrier, OK
Posts: 5,297
Likes: 0
Received 6 Likes
on
6 Posts
Way cool Frank.
The power is great, but its the torque everywhere which really makes the big diff - and the throttle response which makes the car such a joy to drive.
The pull out of corners is just way too good. Shame you can't install a tiny clutch/FW kit, but we all have to trade off.
Congratulations!!!
The power is great, but its the torque everywhere which really makes the big diff - and the throttle response which makes the car such a joy to drive.
The pull out of corners is just way too good. Shame you can't install a tiny clutch/FW kit, but we all have to trade off.
Congratulations!!!
03-18-2013, 11:27 AM
#470
Burning Brakes
I phoned up the MD of Superchips....
He didn't know your car was downstairs. He went for a wander......
...came back and said it's not as powerful as his new one
:rofl:
He didn't know your car was downstairs. He went for a wander......
...came back and said it's not as powerful as his new one
:rofl:
03-18-2013, 01:02 PM
#472
Drifting
Thread Starter
Update:
I'd like some thoughts from the Doc pls.
Ok so here are the dyno plots.
The temp in the dyno cell was 36°C, out on the road 14°C.
Which translates to circa 350hp out on the road.
Torque came in at 358NM!
C4 Transmission loss worked out to 109.7hp. Whereas a C2 35-40hp loss.
Adrian Streather estimates a 28% transmission loss on C4s and 15% on C2s.
Dyno read out coming soon with all the above.
The flat slides will help breathing at the top end.
Oh and it's passed it's MOT.
Cheers.
Cheers Paul
I'd like some thoughts from the Doc pls.
Ok so here are the dyno plots.
The temp in the dyno cell was 36°C, out on the road 14°C.
Which translates to circa 350hp out on the road.
Torque came in at 358NM!
C4 Transmission loss worked out to 109.7hp. Whereas a C2 35-40hp loss.
Adrian Streather estimates a 28% transmission loss on C4s and 15% on C2s.
Dyno read out coming soon with all the above.
The flat slides will help breathing at the top end.
Oh and it's passed it's MOT.
Way cool Frank.
The power is great, but its the torque everywhere which really makes the big diff - and the throttle response which makes the car such a joy to drive.
The pull out of corners is just way too good. Shame you can't install a tiny clutch/FW kit, but we all have to trade off.
Congratulations!!!
The power is great, but its the torque everywhere which really makes the big diff - and the throttle response which makes the car such a joy to drive.
The pull out of corners is just way too good. Shame you can't install a tiny clutch/FW kit, but we all have to trade off.
Congratulations!!!
Cheers Paul
Last edited by Porsche964FP; 03-18-2013 at 02:01 PM.
03-18-2013, 02:49 PM
#475
Burning Brakes
Wow, great news Frank.....now all you need is a nice road trip to run Betty in!
I'll let you go in front up Kemmel, just to make a nice hole for me to follow in.....thought I better get my excuse in early!
I'll let you go in front up Kemmel, just to make a nice hole for me to follow in.....thought I better get my excuse in early!
03-18-2013, 03:01 PM
#476
Three Wheelin'
03-18-2013, 03:45 PM
#477
Addict
Rennlist Member
Rennlist Member
03-18-2013, 03:52 PM
#478
Rennlist Member
If the dyno was done on a rolling dyno then all I care about is the RWHP (and not driveline loss approximations to = what it may or may not be at the crank, IMO/ YMMV etc)....which appears to be 212?
03-18-2013, 04:11 PM
#479
Three Wheelin'
Congratulations Frank and to Nick, that's a lot of work and emotional energy invested to get to this point. I think a celebratory pint of London Pride is definitely in order 
There are too many variables to really pass really meaningful judgement based on that plot alone imo. Whatever the numbers say, I suspect will be something like this to drive;
which you'll find out hopefully on Friday when you've had your cast taken off and are making your way at best speed to the channel tunnel
There are too many variables to really pass really meaningful judgement based on that plot alone imo. Whatever the numbers say, I suspect will be something like this to drive;
which you'll find out hopefully on Friday when you've had your cast taken off and are making your way at best speed to the channel tunnel
03-18-2013, 04:46 PM
#480
Rennlist Member
Congratulations Frank and to Nick, that's a lot of work and emotional energy invested to get to this point. I think a celebratory pint of London Pride is definitely in order
There are too many variables to really pass really meaningful judgement based on that plot alone imo. Whatever the numbers say, I suspect will be something like this to drive;
which you'll find out hopefully on Friday when you've had your cast taken off and are making your way at best speed to the channel tunnel
There are too many variables to really pass really meaningful judgement based on that plot alone imo. Whatever the numbers say, I suspect will be something like this to drive;
which you'll find out hopefully on Friday when you've had your cast taken off and are making your way at best speed to the channel tunnel