I think the blower disengages after a certain rpm. The way I've seen these twin charged systems work is the blower takes up the boost in the low rpm range. That allows you to fit bigger turbos with no lag. The supercharger boosts the low end, and then once the turbos are spinning, the S/C is disengaged and bypassed completely.

So why not go this route and have ZERO LAG ?

Boost comes on under 1,800 RPMS


Thanks
Jon

Wow,
Wild looking engine, Who build it and what power is it making?
thanks,
Dean

How much does it weight?

because they wanted a diesel.

Tom Earhart ( Michigan )

1,500 Hp

1,200 F.T LBS. of Torque at 2,200 rpm's


Thanks
Jon

[QUOTE=cougarman;3003384]Tom Earhart ( Michigan )

1,500 Hp

1,200 F.T LBS. of Torque at 2,200 rpm's


Thanks
J

I wonder if these are going in a big Cougar.:eek:

Sean,

I brought the question about cause not everyone has the no turbo lag figured out. Tom Earhart does.

I respect Mr. Banks and his accomplishments, and the engine is a nice looking piece. However it's that much more to maintain with two different rotating induction systems.

Anyways there was plenty of people on this thread asking about comparison's to gas, carrying the RPM's out furthur etc.

Not looking to take away from anyone, but rather show the options out there. A cleaner option, a much less complicated option. The technology is here also, fully computer controlled, fuel injected etc.


So take it for what it's worth, cause I think in the near future you will see more and more of these :drink:


Take Care

Jon

[QUOTE=KNOT-RIGHT;3003393]

Hey Gerry,

This is in a single engine application, 30' with a #6 drive. And 35 mph to 109 mph in about 12 seconds with the latest testing in late November. There's more in it, but they were running out of lake real quick :drink:


Would be Trick for the Cougar though.


Jon

It's been a long time since I agree with anyone's attempts to make a practical performance marine diesel.

I wrote about similar on here a couple times, blowers on top of 7.3's, it's nice to see the Banks team finally address the low end power problems.

FYI, it's not lag that the blower solves it's lack of heat to be able to spool up any type of turbo charging starting from idle with a large load on it.

You guys make these comparisons to gas engines and you simply can not do that. The diesel has to be geared much taller than a gas engine to get equal prop speed because the top end rpm's are so much lower. Therefore the load on the engine coming off of idle is much greater.

Put anyone of your turbo charged gas engines in a car, put the car in high gear 1:1 like a diesel would be and punch the gas from idle - the engine dies if not stalls. That is how it is for a diesel in high performance boat with a fully submerged surfacing propeller.