Running @ 2700 RPMS highway What is to much RPM - Ford Powerstroke Diesel Forum
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Old 12-14-2008, 07:42 AM
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Running @ 2700 RPMS highway What is to much RPM

I have a 94 PSD tow truck It has 5:13 gears i beleve. Its turning 2500RPm at 55 and 26-2700 RPM @ 60-63 ish. Is this bad for that poor motor?? Its a 5 speed manual so there no chance of it not shifting into overdrive.
It sounds like its going to blow up. Ive hurd never push the PSD past 2500 for a period of time.... Is this true?
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Old 12-14-2008, 07:45 AM
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Several years ago, I had a 00 F-550 and it would be about 3200 at 70 mph..

Don't know if it's bad for them, but it can't be good.
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Old 12-14-2008, 08:21 AM
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Quote:
Originally Posted by DAYTONA392005 View Post
Several years ago, I had a 00 F-550 and it would be about 3200 at 70 mph..

Don't know if it's bad for them, but it can't be good.


Oh my god... 3200 is cranking...
I thought 2700 was extreme..

hopefully someone that knows these motors will chime in.
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Old 12-14-2008, 09:34 AM
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I have a 95 with 4.10s and 5 speed. Sometimes when we go wheeling my truck will be over 3 grand for hours at a time pulling a 18ft trailer with a rock crawler. If you have a tuner or anything over stock keep an eye on you EGTs. Have a buddy that would get his rolling as fast as it would go and never let it off of the rev limiter for hours. No problems came from this either. JJ
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Old 12-14-2008, 11:26 AM
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Wow. I didint expect that. I guess 2600 is babyin it compared to that. LOL I thought that it would blow the injectors or HPOP or somthing go horribly wrong with my luck.
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Old 12-14-2008, 04:12 PM
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our 97 F450 wrecker runs about 3000 rpm to do 65-68mph in 5th gear, it has well over 200,000km on it and its fine...

my F550 roll off runs about 2700 @70mph with the 6 speed and it just turned 400,000km

you will be fine they will burn quite a bit of fuel running that high of rpm though ...
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Old 12-14-2008, 04:17 PM
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What are your EGT numbers lookin at crusin like that?
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Old 12-14-2008, 04:28 PM
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Quote:
Originally Posted by kx592 View Post
What are your EGT numbers lookin at crusin like that?
if you were asking me I have no idea I dont have any gauges in the wreckers as they are all 100% stock the way Ford made them...

with them turning that kind of rpm the boost is up and the turbos singing I cant see the egts getting out of hand with stock tuning
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Old 12-14-2008, 05:28 PM
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That makes me feel better. I just bought it and though oh my god im going to blow this Mother Fer up driving the speed limit LOL.. I cant even hear my self think its so loud driving 60 MPH. I would like to swap my gears for 4:10s... I cant seem to find out what parts that will interchange with my 94F450 with a dana 80 rear. I only found a set or two on ebay.. Theres comflicting onfo on if i can use a 4:10 or not with mt carrier.
Honestly i have no idea. I think ill just have to give her a try. I cant take that motor screeming all the time. I cant even hear my phone ring.
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Old 12-14-2008, 05:29 PM
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Oh look ive hit my 100th post.... Its like a b-day. yea haw! big thanks to powerstroke.org
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