7,5 mm Element design for high performance engine
7,5 mm Element design for high performance engine
(06-19-2013, 10:14 AM)dieselmeken When 17 mm roller should go into the lifter, there was not space enough,Perhaps a dumb question here... Would that level of fuel that quickly lead to some sort of pressure rise the the fuel injector could not handle? After all at 275cc it is far more then double that of the OE delivery rate. Would a two step injector fit the bill better at that point? Just curious... Amazing work!!!
Here you can see the lifter when its done with Wire EDM
From left, 17 mm roller in stock lifter
17 mm roller in wire EDM lifter
15 mm STD roller
With the stroked camshaft I got 275cc of fuel at max racktravel
To note is that the inlet port in the element is 3 mm, Pre stroke is 1,3mm, stroke is 18 degree "long" (4,2mm lift on element) after that the inlet port opens up in the bottom and element goes further 2,5mm to stop injection
To get 275cc on only 18 degree ( 36 engine degree) is quite quick, my old notes told me that a stock 6 mm element gives 83cc on 18 degree
7,5mm 150cc.
If I got a twin inletport and maybee only 1,5 mm hole, (1,5x2) then the pumpstroke would be 1 mm moore, Theroetical that would give me 40-50 cc moore and then the 300cc barrier is broken.
NOTE This is only in theorie, but I am tempted to try it out on a set of elements.
(06-19-2013, 10:14 AM)dieselmeken When 17 mm roller should go into the lifter, there was not space enough,Perhaps a dumb question here... Would that level of fuel that quickly lead to some sort of pressure rise the the fuel injector could not handle? After all at 275cc it is far more then double that of the OE delivery rate. Would a two step injector fit the bill better at that point? Just curious... Amazing work!!!
Here you can see the lifter when its done with Wire EDM
From left, 17 mm roller in stock lifter
17 mm roller in wire EDM lifter
15 mm STD roller
With the stroked camshaft I got 275cc of fuel at max racktravel
To note is that the inlet port in the element is 3 mm, Pre stroke is 1,3mm, stroke is 18 degree "long" (4,2mm lift on element) after that the inlet port opens up in the bottom and element goes further 2,5mm to stop injection
To get 275cc on only 18 degree ( 36 engine degree) is quite quick, my old notes told me that a stock 6 mm element gives 83cc on 18 degree
7,5mm 150cc.
If I got a twin inletport and maybee only 1,5 mm hole, (1,5x2) then the pumpstroke would be 1 mm moore, Theroetical that would give me 40-50 cc moore and then the 300cc barrier is broken.
NOTE This is only in theorie, but I am tempted to try it out on a set of elements.