Intake/Exhaust Design Literature
Intake/Exhaust Design Literature
(OP)
I am working on an intake and exhaust system for a high performance tractor pulling application. The engine in scrutiny is an International DT466. To give you a little background on the engine:
-International DT466 (straight 6 cylinder)
-Stock bore, stroke, connecting-rod length, exhaust manifold, intake, and head
-Peak horsepower of 1136 @ 3000 RPM (which will be the design rpm)
-HX60 Turbo (3in x 4in)
-etc, etc
I currently own Heywood's "Internal Combustion Engine Fundamentals". I have heard both good and bad things about "Scientific Design of Exhaust & Intake Systems" by Phillip Smith and "Practical Gas Flow" by John Dalton. My question for the learned audience is, what literature would be beneficial for gainining knowledge for intake and exhaust tuning for this particular application? I also have access to the SAE journal database, so feel free to suggest SAE documents if you know of any.
Thanks in advance!!
-International DT466 (straight 6 cylinder)
-Stock bore, stroke, connecting-rod length, exhaust manifold, intake, and head
-Peak horsepower of 1136 @ 3000 RPM (which will be the design rpm)
-HX60 Turbo (3in x 4in)
-etc, etc
I currently own Heywood's "Internal Combustion Engine Fundamentals". I have heard both good and bad things about "Scientific Design of Exhaust & Intake Systems" by Phillip Smith and "Practical Gas Flow" by John Dalton. My question for the learned audience is, what literature would be beneficial for gainining knowledge for intake and exhaust tuning for this particular application? I also have access to the SAE journal database, so feel free to suggest SAE documents if you know of any.
Thanks in advance!!





RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Intake/Exhaust Design Literature
But as Greg points out, once you've got a turbine and compressor, wave action isn't that important.
- Steve
RE: Intake/Exhaust Design Literature
As short as practicable and no bigger dia than necessary while still streamlined seems to work best.
In most applications a gain in response more than offsets a gain in steady state power.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Intake/Exhaust Design Literature
Thanks!!
-Adam
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
[URL=ht
[URL=ht
[URL=ht
[URL=ht
[URL=ht
Thanks!
Adam
RE: Intake/Exhaust Design Literature
Just a thought and a couple of questions. I am planning on using a large "conical spline" plenum (volume ~1.5 - 2x engine displacement). Do you think longer or shorter intake runners would be ideal for this application? I was also planning on using constant area runners with a bellmouth at the entrance to each runner.
Any opinions on any of this?
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
If it's a situation where the revs and boost are easily reached in time and the critical part is maintaining or increasing torqur as the revs pull down, internal volume will not be so important, but exhaust gas velocity and retaining high exhaust temperature and the lowest possible intake temperature are important.
I would think real big intercoolers and maybe water to air IC with ice water as it is a short duration test.
I know it goes against all normal practice, but would heavy flywheel and real heavy turbo wheels help.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Intake/Exhaust Design Literature
Re the tuned length formulas, they are about exhaust scavenging rather than turbine efficiency. I think your main focus should be turbine efficiency.
Tuned length formula does change with temperature and turbo exhausts are substantially hotter than NA temps.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Intake/Exhaust Design Literature
As far as education goes, I think I am going to splurge and buy Winterbone's two volume set: Theory of Engine Manifold Design and Design Techniques for Engine Manifolds. From everything I've heard, the set is the authority on intake and exhaust design.
Thanks for all of the help!
-Adam
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Intake/Exhaust Design Literature
RE: Intake/Exhaust Design Literature
Wet compression has a lot of benefits. By adding different volumes of water, the change in specific gravity of the intake charge allows you to 'stretch' the compressor map very slightly, and can keep a given turbo in the peak efficiency over a wider range of conditions. Downsides being long term erosion of the turbo, and of course over complicating the system.
Especially if intercooling is not allowed, I'd take a very good look at improving the water injection system. Based on the perceived cost of the project, an on/off system seems very primitive.
RE: Intake/Exhaust Design Literature
Adam
RE: Intake/Exhaust Design Literature
Right or wrong, most pulling tractors guys tend to stick with manifolds designed similar to stock. I think part of it is packaging and part is a lack of knowledge. Many pullers just replace/redesign parts after they blow up! Back-woods engineering at its best.
"I am planning on using a large "conical spline" plenum (volume ~1.5 - 2x engine displacement)."
There have been discussions on plenum shape before (constant area vs. tapered), with no conclusive answer. Just make sure that the plenum extends beyond the last cylinder.
"Do you think longer or shorter intake runners would be ideal for this application?" Just because the air is under pressure does not mean that runner tuning doesn't work. In reality your "fluid" is just more dense. But in the long run will all the work designing, packaging and building such a manifold be worth it? Thats for you to decide.
ISZ