Detroit Diesel 6-71 engined "MG" type Leyland Leopard - ex-CIÉ / Bus Eireann MG210 (1971)

[markthebusman]

@danpower71 - I havent a clue what you are saying, English please!!

[icenijohn2]

3500 RPM! I don't think so. 71 Detroits can run up to 2300 RPM, but anything more will give them a very short life. My Crown's 6V92 is governed at 2100 RPM, which gives me 67 MPH with a 4.1 axle and 12R22.5 tires. Remember that a 6-71 at 2300 RPM will sound like a 4-stroke at 4600 RPM!  Detroits love to run at WOT, and you won't hurt them running at governor all day long. Nothing kills them quicker than lugging them.

[volker185]

On the introduction of this video it said DUAL EXHAUSTS. Mistake,or were there actually dual manifolds for 671 Detroits, or wre they home made?

[markthebusman]

@volker185 what introduction??! Also how could you have dual exhaust manifolds on an inline engine? Only get dual exhausts on a V engine. Are you sure your looking at the right video, buddy?

[volker185]

Check your videos. Lots of info on BACK DROP MANIFOLDS for Cummins 220 etc. This was a manifold made years ago by the ELLIS company. Allows for dual exhaust on in line Cummins. Also, something I have been trying for some time to find out ''Can you split an exhaust manifold on a non turbo 6-71 Detroit engine for dual exhaust ?''. I refer You to

MANCUB61081. Check his site and ask him this question. ''OLD IRON! GMC DIESEL'' video. Thanks for your reply.

[chinitalokita21]

@markthebusman actually some of these did have 2 manifolds, one for the front 3 cylinders and one for the back

[mrspivvy]

That's something different- a leopard with a detroit! possibly the only engine conversion thats guarenteed to use more diesel than the original o.680!

[markthebusman]

Yeah, it might have used more diesel, but it lasted a hell of alot longer than an O.680 engine!

[mrspivvy]

if you see much more than 300,000 miles from a detroit you're doing very well. they need constant revving which knackers them up quickly.

[tpvalley]

I think the railways used the 149 series detroits in railcars and 567 upwards in locomotives, I could be wrong.

Quite narrow rev range detroits evidently, sound good, have a look at checkmate the tractor puller on youtube its insane.

[neurocytohemotoxic]

This bus sounds amazing! Screamin detroit!

[irishmanufan]

is that something similar to a bomabrdier engine . it sounds it .

[markthebusman]

Yes it sounds and works pretty much the same (2 stroke diesel with a supercharger) but its a different design, KD/KE/MG bus had exactly the same displacement (436cu inch/6.9 litre) except this is an inline-6-71 engine, a Bombardier KD or KE was a V6-71

[burghill1979]

the detroit is alot smaller than the 680. the detroit 6v71means no of cylinders x cubic inches so is much smaller and if u dont believe me than look em up on google

[markthebusman]

Yes you are correct, the dsplacement is smaller in a 6-71 (436cu inch (6.9 litre) - the 680 is [11.1 litres] 680cu inch displacement, however the overall 6-71 block is bigger and a hell of alot heavier than a 680, trust me - I have seen two of them side by side on a bench!

[ClassicTVMan81]

It's actually 426 cubic inches (7 liters) for the 6-71 and 6V-71. "6V" means V-6 engine while "8V" means V-8 engine and "12V" means V-12 engine.

[gcbus]

Wow - that sounds meaty and kinda weird at the same time :-)