Intake/Exhaust Design Literature

[afsvrf]

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!!

 

[patprimmer]

Or at least feed boost pressure back into the water tank vent so at least you maintain the pressure differential.

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

http://eng-tips.com/market.cfm

for site rules

 

[afsvrf]

Great ideas. I will certainly look into those next winter when we are on the dyno. By the way, Winterbone's two book set departed the UK today for my doorstep. I HOPE they are worth the money!!

 

[1gibson]

Hardly on topic, but have you considered pre-turbo water injection, using a progressive controller? You can get some really nice controllers with multiple inputs (boost, RPM, EGT, etc.). Programmable rates, input logic, closed loop feedback, etc. that are cheap (a few hundred dollars) and can basically do anything you tell them. I hope posting links to products is not prohibited...

http://www.coolingmist.com/detailpage.aspx?pid=1099&feature_key=Smart_injection,safety,controllers

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.

 

[afsvrf]

I will have to see what the rules read concerning electronic control of the water injection unit. I do know that no electronic control for fuel is allowed. All things to think about before I go to the dyno again. Thanks!

Adam

 

[IceStationZebra]

The rules for pulling tractors is similar to top fuel/pro stock drag racing in that electronic controls are prohibited. (but they can use data loggers) On these cars they use pneumatic logic circuits to automate certain functions, with a small compressed nitrogen bottle. Not sure that it would be worth the effort in your application as most of the competition is using on/off control right now.

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