Running @ 2700 RPMS highway What is to much RPM - Ford Powerstroke Diesel Forum
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post #1 of 19 Old 12-14-2008, 06:42 AM Thread Starter
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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?

early 99 (11/98)
PSD F250 lariat crew cab sb.
3"lift w/ 33/12.50 24's
5" silverline stright pipe
k&n intake filter
1705 max microtuner
otherwise all stock.

94.5 PSD Fsuperduty 450 wheel lift wrecker
5 speed
BB mod
5:13 gears
Top speed 69mph
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post #2 of 19 Old 12-14-2008, 06:45 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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post #3 of 19 Old 12-14-2008, 07:21 AM Thread Starter
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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.

early 99 (11/98)
PSD F250 lariat crew cab sb.
3"lift w/ 33/12.50 24's
5" silverline stright pipe
k&n intake filter
1705 max microtuner
otherwise all stock.

94.5 PSD Fsuperduty 450 wheel lift wrecker
5 speed
BB mod
5:13 gears
Top speed 69mph
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post #4 of 19 Old 12-14-2008, 08:34 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

04 F-550 CC 6.0 4x4 cab n chassis 4.88 XLT 193K
Money maker with utility bed.
97 F-350 CC 7.3 ZF-5 4x4 4.10 324K
Moves my stuff around.
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post #5 of 19 Old 12-14-2008, 10:26 AM Thread Starter
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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.

early 99 (11/98)
PSD F250 lariat crew cab sb.
3"lift w/ 33/12.50 24's
5" silverline stright pipe
k&n intake filter
1705 max microtuner
otherwise all stock.

94.5 PSD Fsuperduty 450 wheel lift wrecker
5 speed
BB mod
5:13 gears
Top speed 69mph
street-legal? is offline  
post #6 of 19 Old 12-14-2008, 03:12 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 ...

1999 F250 XLT 2WD 7.3, 6 spd, South Bend Con OFE, Detroit Truetrac, Tony Wildman tunes, Autometer Boost&Pyro, AFE Stage II, 4" MBRP Exhaust, 2" Daystars, 17x9 DC1 wheels wrapped in 33x12.50 MTZ's

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post #7 of 19 Old 12-14-2008, 03:17 PM
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What are your EGT numbers lookin at crusin like that?

1997 7.3 extended cab 8ft.

4" straight piped
DIY intake- 6637 filter
178K on the dash
Boost, PYRO, Trans temp gauges (auto meter)
33" nittos on stock height
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post #8 of 19 Old 12-14-2008, 03:28 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

1999 F250 XLT 2WD 7.3, 6 spd, South Bend Con OFE, Detroit Truetrac, Tony Wildman tunes, Autometer Boost&Pyro, AFE Stage II, 4" MBRP Exhaust, 2" Daystars, 17x9 DC1 wheels wrapped in 33x12.50 MTZ's

Chris


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post #9 of 19 Old 12-14-2008, 04:28 PM Thread Starter
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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.

early 99 (11/98)
PSD F250 lariat crew cab sb.
3"lift w/ 33/12.50 24's
5" silverline stright pipe
k&n intake filter
1705 max microtuner
otherwise all stock.

94.5 PSD Fsuperduty 450 wheel lift wrecker
5 speed
BB mod
5:13 gears
Top speed 69mph
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post #10 of 19 Old 12-14-2008, 04:29 PM Thread Starter
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Oh look ive hit my 100th post.... Its like a b-day. yea haw! big thanks to powerstroke.org

early 99 (11/98)
PSD F250 lariat crew cab sb.
3"lift w/ 33/12.50 24's
5" silverline stright pipe
k&n intake filter
1705 max microtuner
otherwise all stock.

94.5 PSD Fsuperduty 450 wheel lift wrecker
5 speed
BB mod
5:13 gears
Top speed 69mph
street-legal? is offline  
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