improving the airflow
Discussion
anybody worked on that ? I am planning to add an airhose from the front of the airbox to the grill somewhere as it seems the most logical thing to do to improve fresh air flow to the filter (original input is from the underside,where there is no airflow under the car). It seems like an easy fix and I am sure someone else thought of that as well (ofcourse no search funtion).....
There is airflow under the car but it would probably create a venturi effect on the airbox feed causing a slight drop in pressure getting worse with higher speed . This will not , of course , show up on a dyno . If you feed the airbox from the front you can also fit an larger oil filter which is able to cope with the volume of oil from the pump
plasticman said:
There is airflow under the car but it would probably create a venturi effect on the airbox feed causing a slight drop in pressure getting worse with higher speed . This will not , of course , show up on a dyno . If you feed the airbox from the front you can also fit an larger oil filter which is able to cope with the volume of oil from the pump
you took the words right out of my pen...any examples or pictures ?There is no airflow to the top of the airbox and (at least on my car) the bonnet closes on the top of the airbox as well, so that airbox might have some advantages but it is not the improved airflow as far as I can see. That is just my amateur opnion btw there are much more technical skilled people here...
Jason at Str8Six said that the current airbox design is very good, having the air arrive in the middle of the six intakes, rather than in front of the first. I suppose having both might be better ?? Some kind of ram air effect at speed if implemented like Clive's, but I'm sure there's some well clever chaps who know all about how the two airflows will interact ??
spitfire4v8 said:
Ive probably done more sp6 airbox design testing than anyone outside the factory. The std airbox is very good, but all the current test results are being turned into a nice carbon airbox as we type/speak. Hopefully only a month away now 
I am looking for a carbon air box post this Afgan trip would love to see it befor i go str8 for the ACT oneIMHO difficult to improve on the large diameter, short, central, airbox intake and very effective plenum that TVR designed, if you do a bit of research into airbox/plenum design.
Cylinder vacuum on a big engine is huge enough to overcome any very slightly lower pressure from aero effect, ram air doesn't help below VERY high speeds, and a flow from the front will give unbalanced airflow per cylinder.
Cylinder vacuum on a big engine is huge enough to overcome any very slightly lower pressure from aero effect, ram air doesn't help below VERY high speeds, and a flow from the front will give unbalanced airflow per cylinder.
tail slide said:
IMHO difficult to improve on the large diameter, short, central, airbox intake and very effective plenum that TVR designed, if you do a bit of research into airbox/plenum design.
Cylinder vacuum on a big engine is huge enough to overcome any very slightly lower pressure from aero effect, ram air doesn't help below VERY high speeds, and a flow from the front will give unbalanced airflow per cylinder.
Now that makes sense...maybe even more them my own idea :-) curious how clive coped with the extra airflow now..Cylinder vacuum on a big engine is huge enough to overcome any very slightly lower pressure from aero effect, ram air doesn't help below VERY high speeds, and a flow from the front will give unbalanced airflow per cylinder.
Paul is right, the large bore pipe to the floor is the best way of getting air into the airbox, the ram effect only works at high speed, also the size of the pipe from the front of the car is a lot smaller in diameter, 3" compared to 4" .
you cannot go bigger on the pipe from the front of the car because of the restriction on the size of pipe that you can fit into the front face of the lower half of the airbox, which is why I am still using the standard intake pipe as well.
I still need to find time to get out with some pressure sensors rigged up inside the airbox to test wether its best with just the down pipe, or both, as with both there is a chance that the air comes in the front and out of the other pipe
the main advantage of the ram pipe is the air temperature being colde from the front of the car, but again at speed I`d imagine the air to be just as cold from underneath.
worth noting thatI also have incorperated a naca duct into the chassis closing plate to help encourage air up into the standard air intake pipe.
I feel the one of the biggest improvements on my car, along with the GT cams is having Joolz designed shorter intake tract airbox, with bigger injectors and a remap.
you cannot go bigger on the pipe from the front of the car because of the restriction on the size of pipe that you can fit into the front face of the lower half of the airbox, which is why I am still using the standard intake pipe as well.
I still need to find time to get out with some pressure sensors rigged up inside the airbox to test wether its best with just the down pipe, or both, as with both there is a chance that the air comes in the front and out of the other pipe
the main advantage of the ram pipe is the air temperature being colde from the front of the car, but again at speed I`d imagine the air to be just as cold from underneath.
worth noting thatI also have incorperated a naca duct into the chassis closing plate to help encourage air up into the standard air intake pipe.
I feel the one of the biggest improvements on my car, along with the GT cams is having Joolz designed shorter intake tract airbox, with bigger injectors and a remap.
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