09-22-2012, 05:48 PM
|
#41 (permalink)
|
|
Banned
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442
Thanks: 1,422
Thanked 737 Times in 557 Posts
|
And we rarely get above 2000-rpm (heavy payload or heavier trailer and/or hilly starts or mountain grades).
|
|
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
09-22-2012, 06:55 PM
|
#42 (permalink)
|
|
Master EcoModder
Join Date: Jan 2010
Location: Independence, KY
Posts: 603
Thanks: 89
Thanked 47 Times in 44 Posts
|
I was thinking since you measure to length from the valve to a protrusion/hard surface to reflect the pulse wave you could build the intake similar to the exhaust. Build the mounting bracket to the heads then bend the first stage pipes till they all meet the same point where they blend together into a larger pipe and that pipe works its way back to the turbo making that the first surface it sees allowing for a longer runner length.
Literally it would be like running a tuned length exhaust manifold on the intake.
__________________
 I move at the speed of awesome.
"It's not rocket surgery!" -MetroMPG
|
|
|
|
|
12-29-2012, 11:11 AM
|
#43 (permalink)
|
|
Do more with less
Join Date: Jul 2010
Location: North Eastern Missouri
Posts: 930
Thanks: 66
Thanked 177 Times in 112 Posts
|
On an IDI turbo engine how does all the air get through the small holes in the pre chambers and what effect does that have on intake tuning?
__________________
“The further a society drifts from the truth, the more it will hate those that speak it.” George Orwell
“Before a standing army can rule, the people must be disarmed; as they are in almost every kingdom in Europe.
The supreme power in America cannot enforce unjust laws by the sword; because the whole body of the people are armed.”
– Noah Webster, 1787
|
|
|
|
|
12-30-2012, 01:58 AM
|
#44 (permalink)
|
|
Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,265
Thanks: 273
Thanked 3,568 Times in 2,832 Posts
|
Quote:
Originally Posted by Varn
On an IDI turbo engine how does all the air get through the small holes in the pre chambers and what effect does that have on intake tuning?
|
None. You don't have to worry about the small pre cup hole until after the intake valve is closed.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|
|
|
|
|
12-30-2012, 11:02 AM
|
#45 (permalink)
|
|
Do more with less
Join Date: Jul 2010
Location: North Eastern Missouri
Posts: 930
Thanks: 66
Thanked 177 Times in 112 Posts
|
Had a brain fart. Of course the intake valve isn't in the pre chamber.
Thanks
__________________
“The further a society drifts from the truth, the more it will hate those that speak it.” George Orwell
“Before a standing army can rule, the people must be disarmed; as they are in almost every kingdom in Europe.
The supreme power in America cannot enforce unjust laws by the sword; because the whole body of the people are armed.”
– Noah Webster, 1787
|
|
|
|
|
12-31-2012, 07:35 AM
|
#46 (permalink)
|
|
Banned
Join Date: Feb 2008
Location: california
Posts: 1,329
Thanks: 24
Thanked 161 Times in 107 Posts
|
Did somebody say small prechamber hole?
 |
|
|
|
|
01-07-2013, 02:25 AM
|
#47 (permalink)
|
|
Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,265
Thanks: 273
Thanked 3,568 Times in 2,832 Posts
|
I think those pre chambers would be good for smoother starts and quieter running but I have a feeling they could increase pumping losses.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|
|
|
|
|
08-28-2021, 04:05 PM
|
#48 (permalink)
|
|
Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,265
Thanks: 273
Thanked 3,568 Times in 2,832 Posts
|
I was looking at another practical application for super volumetric efficiency. My riding lawn mower.
Using an on line calculator it looks like the intake runner is perfect size and length to capture the 4th harmonic pulse at its rated speed of 3,500rpm.
None of these on line calculators existed 20 years ago when I first published the super VE chart so it appears to work.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|
|
|
|
|
