Individual TB thoughts... Header syyle intake? Crazy Swedes?
04-03-2005, 04:30 AM
#46
Race Director
Thread Starter
Yeah I heard 1.5-2.0 times displacement for plenum volume. What is the calculation of peak torque rpm and runner length? When do I want peak torque ideally?
04-03-2005, 03:21 PM
#49
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Originally Posted by Duke
Yes the M3 intake is a beauty! It's not that expensive, ranging between 1000-1500 EUR depending on options.
04-03-2005, 03:43 PM
#50
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Originally Posted by special tool
We will have hard data on whether or nor Skunk is correct in a few weeks.
The data will be on ONLY this.
Fact, not fiction.
The data will be on ONLY this.
Fact, not fiction.
04-03-2005, 05:54 PM
#51
9M started the development work on a ITB for the 968, check out the following thread, rather long but informative.
http://65.61.16.109/forum/topic.asp?TOPIC_ID=2478
I'm not sure 9M made a working prototype, but considerable development has been done.
Regards,
Chris
http://65.61.16.109/forum/topic.asp?TOPIC_ID=2478
I'm not sure 9M made a working prototype, but considerable development has been done.
Regards,
Chris
04-04-2005, 05:01 AM
#54
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Originally Posted by special tool
Skunk - yes
You will be the 4th to know.
You will be the 4th to know.
...have done loads of testing,just haven't got it to the dyno. What primary goals do you have? Broad range or high peak hp? ....or... both...? The specs I said was for a stock 951,you'll need something different if it's on a tuned one...
04-04-2005, 11:26 AM
#56
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How did you arrive at 5 litres for the plenum NZ ?
Take note the the requirements for multiple TB's
are slighlty different from running a single TB.
A large plenum is required for single TB wherelse
multiple TB's can use smaller plenum.
Take note the the requirements for multiple TB's
are slighlty different from running a single TB.
A large plenum is required for single TB wherelse
multiple TB's can use smaller plenum.
04-04-2005, 04:39 PM
#58
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1-2 times, that's why I mentioned a least 2-3 litres.
Look at the stock manifold, it does not look like it's
got 3 litres in the plenum. In any case, the sensable
figure should be 2-5 but 5 would mean huge right ?
The SR plenum is very well designed. You can follow
the shape & just adjust the volume.
Look at the stock manifold, it does not look like it's
got 3 litres in the plenum. In any case, the sensable
figure should be 2-5 but 5 would mean huge right ?
The SR plenum is very well designed. You can follow
the shape & just adjust the volume.
04-05-2005, 02:35 AM
#59
Race Director
Thread Starter
I just bought and read Cork Bells book. He suggests a plenum size of 50-70% of displacement... hmmm thats against most everything else I have read. I have a great idea on runner design now but a couple of things still remain...
1. What lengths should the runners be for peak torque at 4000-4500rpm
2. What plenum volume
3. Is 43mm big enough for the TB's
4. Where should the TB's be mounted
1. What lengths should the runners be for peak torque at 4000-4500rpm
2. What plenum volume
3. Is 43mm big enough for the TB's
4. Where should the TB's be mounted