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 656 Posts Member #: 1917 AKA chargedzetec Milton Keynes |
11th Feb, 2014 at 09:47:15pm
I'm going to have a go at a side fed plenum as well the itb setup I have on the go.
This is FORD country, on a quiet day you can hear Vauxhalls rusting. |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
11th Feb, 2014 at 09:57:55pm
as I understand it the plenum needs to be a big enough resovoir to fill the cylinder totally, this needs to take into account any ram/pulse effect pushing past 100% VE, i think 1.5 is used as a safe bet that wont be huge. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
11th Feb, 2014 at 09:58:29pm
and the 1.5 is just the plenum, not the runners too. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
12th Feb, 2014 at 11:53:42am
I made a plenum recently and hunted round for help. There is a lot of conflicting infomation out there. My plenum was for a 750cc engine so at 1.5 capacity this was a tiny plenum and not really ideal. In the end I just made it so the trumpets fitted and it fitted in the space I have available. It ended up about 3.5l, which is quite small in reality when you consider the voulme of air going through it at 10k rpm.. http://www.twin-turbo.co.uk
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 88 Posts Member #: 720 Advanced Member Gloucestershire |
13th Feb, 2014 at 09:49:44pm
Don't these plenum volume ratios relate to a true "plenum" which is on the intake side of the throttle? |
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Site Admin  9404 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
14th Feb, 2014 at 08:59:43am
I've also found totally contradicting information on ideal volume, some said 100% of engine says, 2x engine size some 50% of engine size. With all this info I assumed it didn't make much difference so went on what material I had available at the time. Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
14th Feb, 2014 at 09:05:57am
Concentrate more on the shape and the inlet entry. You want to avoid a design that favours airflow to some TBs at the expense of others.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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 283 Posts Member #: 8215 Senior Member Rayleigh |
14th Feb, 2014 at 09:07:54am
Make two different sizes and do back to back tests! Dave the Cake |
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