She's runnin but with issues
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Tuned
Joined: Nov 2002
Posts: 348
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From: Benson, AZ
She's runnin but with issues
Ok i finally got my '86 running with a few problems first i have air intrusion thinking injector return lines or where i have had to repair fuel lines no biggie there.
I have a few electrical gremlins to work out not a big issue there.
But it seems like she is running like a dog. When i have her running the motor sounds good and when I crack each injector I get a miss on each one. and on the road i get a top speed of about 55 in 4th before it sounds like i am over revving. I would need to check the Gear ratio on the rear end and on the tranny.
Just seems like i have great low end but nothing on the high end.
Any ideas before i shell out $500 on injectors a pump and install kits to go with them?
Scott
I have a few electrical gremlins to work out not a big issue there.
But it seems like she is running like a dog. When i have her running the motor sounds good and when I crack each injector I get a miss on each one. and on the road i get a top speed of about 55 in 4th before it sounds like i am over revving. I would need to check the Gear ratio on the rear end and on the tranny.
Just seems like i have great low end but nothing on the high end.
Any ideas before i shell out $500 on injectors a pump and install kits to go with them?
Scott
Fleet Owner
Joined: Jul 2006
Posts: 20,373
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From: Mi'kma'ki
what's her RPM @ 55? or you have no tach?
the IDI puts out her max hp at 3k rpm.so if you go over that,your dropping ponies.
tho i dunno how fast.i cant find a chart.
that should take some steep gears to put you up there tho with a 4th gear.wow,maybe someone before you,really geared her down for hauling seriously.
yeah.don't buy anything until you find out what short of gearing you have going on there.
the IDI puts out her max hp at 3k rpm.so if you go over that,your dropping ponies.
tho i dunno how fast.i cant find a chart.
that should take some steep gears to put you up there tho with a 4th gear.wow,maybe someone before you,really geared her down for hauling seriously.
yeah.don't buy anything until you find out what short of gearing you have going on there.
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Tuned
Joined: Nov 2002
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From: Benson, AZ
Sorry no tach wishful thinking though. We've had her for 5 yrs and my father payed $800 so can't complain. The PO swapped the rear end from 4.10 to a 3.11 i believe because the top speed tapped out was 55 but it would haul anything under the sun.
Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
Ok mine that has 4.10 gears I seldom run over 55 with it. It will actually run 75 before the govenor stops it but over 55 it changes the fuel mileage lots. and sounds like it is fixing to leave the ground.
These motors have more low end than they due top end I think peak torque is around 1400 rpms then starts back down, but at 55 it should be peppy.
Check to see if your fan clutch is locked up. Another thing to check is your muffler if it still has the original there is a good chance it is rusted inside and half stopped up and they were very inadequate new. The pipe unbolts ahead of the muffler unbolt it and see if it picks up power these things have to breath.
These motors have more low end than they due top end I think peak torque is around 1400 rpms then starts back down, but at 55 it should be peppy.
Check to see if your fan clutch is locked up. Another thing to check is your muffler if it still has the original there is a good chance it is rusted inside and half stopped up and they were very inadequate new. The pipe unbolts ahead of the muffler unbolt it and see if it picks up power these things have to breath.
Lead Driver
Joined: Nov 2003
Posts: 6,900
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From: Campbell River, B.C.
Are you running out of RPM @ 55 or simply worried about the noise and backing off? Either way, it seems unlikely that you would have any problems holding 60 or even 70 with 3.11 gears. I am stumped on this one.
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Tuned
Joined: Nov 2002
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From: Benson, AZ
With all the problems with this motor i am afraid of doing more damage to it than has already done it just seems sluggish. I may just be paranoid of hurting my baby since i just got her running again.i have unhooked the exhaust before and she did get some extra pep maby i will try it again and see what happens
Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
he could have put 4:88's or 5:13's or somewhere around that in there if he was carrying some serious weight/pulling and wanted her to just go slow and easy but whatever she had on her back or hooked to her was going with.
low numbers 3:??:1 would be more in the direction for cruising speeds macman.(higher numbers= lower gears.)
try doing this macman:
http://www.btc-bci.com/~billben/reargear.htm
low numbers 3:??:1 would be more in the direction for cruising speeds macman.(higher numbers= lower gears.)
try doing this macman:
http://www.btc-bci.com/~billben/reargear.htm
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Tuned
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From: Benson, AZ
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Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
Tranny is 1 to 1 in high gear with 4.10 gears it will top out around 75 mph max.
If he changed the gears to cruise faster the most popular gears are 3.55 and it would top out around 85. Check your speed many people that swap the rearends do not recalibrate the speedo so yours may be 10 mph off.
If he changed the gears to cruise faster the most popular gears are 3.55 and it would top out around 85. Check your speed many people that swap the rearends do not recalibrate the speedo so yours may be 10 mph off.
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
May of the 80's speedo's were off about 5 MPH, showed faster than you were actually going.
So if he did swap rear axles to 3.55's, that would leave you running 5 MPH faster than what the speedo is showing.
Do you have a tach?
If so, give me a speed, RPM, tire size and I can figure the axle ratio.
The indicated speed don't even need the tire size, but that does come into play for the actual speed.
With a 4 speed, 2150 should be 55 MPH and 2700 should be 70 MPH with 235/85-16 tires for actual speeds.
So if he did swap rear axles to 3.55's, that would leave you running 5 MPH faster than what the speedo is showing.
Do you have a tach?
If so, give me a speed, RPM, tire size and I can figure the axle ratio.
The indicated speed don't even need the tire size, but that does come into play for the actual speed.
With a 4 speed, 2150 should be 55 MPH and 2700 should be 70 MPH with 235/85-16 tires for actual speeds.
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From: burley, idaho, usa
seriously i feel ya there dude
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Tuned
Joined: Nov 2002
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From: Benson, AZ
OK i just ran to town with her with my wife behind me found she is running 15MPH over what she is reading so running at 60 i am really running 75 so not too bad plus i found that the Exaust manifold is disconnected on the driverside so it sounds really really loud on the hiway. plus i have an air intrusion problem i need to track down. also it looks like the IP is set dead center. so timing is on my todo list.
Scott
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