| Author |
Message |
steve souza (Stevebnut) (24.91.90.28)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 24, 2002 - 6:51 pm: | |
I am a firefighter in massachusetts and one of the reserve engines has a straight 671 with a allison automatic.
It is around a 1975 and has been with us for a while.
What i am asking is has anyone ever heard of a 671 shifting at 3100 rpm's? yeah 3100!!
This truck really moves and when it shifts it is like a race car with a shift kit!
I drove this on several occasions over the years and cannot believe it has not blown up.
Some engines these straight 671's
Can i run my 6v71 anywhere near these revs?
naw, no way
Da book seez 2150.
Steve Souza |
Buswarrior (Buswarrior) (64.229.213.99)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 24, 2002 - 10:30 pm: | |
Hello Steve.
Wow, either God and DD pay a particular and special attention to the engines of the fire service, or the tach is reading a little on the high side!
Call me a godless heathen but my guess is the latter, not the former.
Such obvious signs of divine intervention are usually reserved for more significant things...
Or, you just jinxed it by telling us about it!
happy coaching!
buswarrior |
steve souza (Stevebnut) (24.91.90.28)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, April 25, 2002 - 9:52 pm: | |
buswarrior--
the tach is cable driven and could be wrong but you should hear this thing scream.
I probably would not believe the story except for driving this screaming monster myself.
I think the fact that these fire engines hold up with all these different people driving them is in fact a near miracle already!! LOL
Can't wait to drive it again!
The next time i see the mechanic in the repair shop i am going to see what he has to say on the matter. Till then don't turn yur guvner up ha ha ha.
Steve S. |
Jim Nelson (166.90.108.178)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 29, 2002 - 5:12 pm: | |
That's where the nickname "Screaming Jimmy" came from. I've only seen one 6-71 run away - and even then, that old sucker held 4100 rpm for about 30 seconds before it blew! Those old engines are beasts. The big reason for the lower rpms in the book are beacuse most clutches fragged at higher rpm's, and automatic tranny's didn't like it, either. |
Henry R. Bergman, Jr. (Henryofcj) (63.224.197.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 18, 2002 - 6:53 pm: | |
Hello Steve;
3100 rpm sounds a tad high. Our old LaFrance engines had 671 and 8V71 mills with N90 injectors (no turbos) and 2500 was about they ever saw.
The shop also swapped out some V12 Seagreave gassers for 8V71 Detroits and the tack cable drive was never quite right.
The tack read 3000 while the Detroits only were turning about 2350. Still sounded very cool on a cold clear winter night roaring thru the gears.
Having said that, some crazy things are done with Detroit two-strokes. Truck racing, tractor pulling, some marine applications--who knows for sure. Thanks Henry |