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911tom's 3.8l engine build
- Thread starter 911tom
- Start date
FRP said:
:worship:
The kids were playing in the car last night...at first I said "Don't touch this, don't stand on that..." but then I thought "It's only a bl00dy car!!!"
I will just buy a new part if they break something, or paint it again if they scratch it, there are a lot more things in life to be worried about and if your car is the only worry that you have then you are a very privileged person in my eyes... :judge:
Back on topic...
It wasn't a no from Tom was it :dont know:
I will get my helmet :grin:
sim996
Montreal
- Joined
- 5 Aug 2017
- Messages
- 538
911tom said:I should hopefully be picking up my car later today from Fearnsport after having a custom Fearnsport built intake and methanol kit. The pipework and methanol tank has been designed by Matt himself and in true Fearnsport style is an absolute work of art!
Where is the air box, are you running fender well intakes?
diverzeusy
Suzuka
- Joined
- 10 Nov 2012
- Messages
- 1,231
Just read this build from start to finish. Superb read and confidence inspiring.
Do you still own, use the car? What are your impressions after so much more time with it? Any videos? I'd love to hear the sound with a more open induction side. I absolutely love what you've done with the switchable maps without adding switches! Very cool 8)
I was wondering how you put more power down and with only RWD!? Mine (with barely more than a remap) overcomes grip in the first two gears and really feels like it hassles the 4WD system in 3rd. Even 4th can get bursts of wheelspin around 4000rpm in the wet or cold weather. I guess it's a case of mapping it right, knocking out the torque spikes, slowing the onset. Plus perhaps not a whole lot more torque at 4500rpm, just keeps pulling harder for longer?
I would enjoy a slightly different shaped power curve, so you feel inspired to wring out those last 500rpm.
Do you still own, use the car? What are your impressions after so much more time with it? Any videos? I'd love to hear the sound with a more open induction side. I absolutely love what you've done with the switchable maps without adding switches! Very cool 8)
I was wondering how you put more power down and with only RWD!? Mine (with barely more than a remap) overcomes grip in the first two gears and really feels like it hassles the 4WD system in 3rd. Even 4th can get bursts of wheelspin around 4000rpm in the wet or cold weather. I guess it's a case of mapping it right, knocking out the torque spikes, slowing the onset. Plus perhaps not a whole lot more torque at 4500rpm, just keeps pulling harder for longer?
I would enjoy a slightly different shaped power curve, so you feel inspired to wring out those last 500rpm.
bazhart
Barcelona
- Joined
- 20 May 2009
- Messages
- 1,343
it's Jerk that causes wheel spin - where Jerk is the rate of change of acceleration. If you can keep a smooth torque delivery from relatively low revs - even if it rises and falls with revs - it rarely is enough to break grip especially as under acceleration the weight transfer loads up the rear tyres - except with a powerful 4 wheel drive it can negate that by lightening the front grip.
bazhart said:
I imagine that must be quite hard to map out? Pressurising the new actuators when I set them up manually I noticed they seemed to mechanically respond relatively slowly. The onset of boost with the standard X50 turbos is a sharp ramp, it must climb 200 lb/ft in 200rpm.
Hmmm, could be a lack of weight transfer limiting grip, if its just my car suffering? The back of my car is higher than the front. I suspect previous owner may have added rake to try and sharpen the turn in (it hasn't worked), add to that the extremely stiff springs that come on the Ohlins and the stiff engine mounts. It probably receives significantly less benefit from the weight transfer vs standard.
bazhart said:
I imagine that must be quite hard to map out? Pressurising the new actuators when I set them up manually I noticed they seemed to mechanically respond relatively slowly. The onset of boost with the standard X50 turbos is a sharp ramp, it must climb 200 lb/ft in 200rpm.
Hmmm, could be a lack of weight transfer limiting grip, if its just my car suffering? The back of my car is higher than the front. I suspect previous owner may have added rake to try and sharpen the turn in (it hasn't worked), add to that the extremely stiff springs that come on the Ohlins and the stiff engine mounts. It probably receives significantly less benefit from the weight transfer vs standard.
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