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Old 09-08-2012, 01:06 PM   #11 (permalink)
oil pan 4
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Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
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The biggest problem with using super V.E. on diesels is the intake runners will need to be really long to keep the motor a harmonic range at cruise speed.

If you have 24 inch runners and start going up a hill and start pushing 20psi of boost the runners are going to effectivly become 28 inches long. Thats more useful.
If you could stretch them out to 32 inches, with a little boost they could become quite useful for towing/crusing. Use the 4th (+4%) harmonic range for cruise, put your foot down and bring it out of over drive and add more boost to get into the 3rd harmonic range (+7%), and when you drop it into 2nd or 3rd gear going over a mountian pass RPMs and PSI go up and bring you into the 2st harmonic range (+10%).

I am pretty much stuck with my OEM 24 inch runner intake. I dont think I could beat them for towing and power. I dont think I have enough room for the 32'' long runners needed to take advantage of harmonics at cruise RPM.
Maybe some of the 4cylinder guys do.

I like flow harmonics. I'm putting an expansion chamber exhaust on my chainsaw too.
Its kind of hobby.

Also water injection will slow down the pluses, but to what degree I do not know.

__________________
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.
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