First real drive!
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Senior User
Joined: May 2004
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First real drive!
Well I drove the F-250 to work for the first time with the rebuilt 390!
First real drive other than around the block.
I figure the commute to work and back will help with the break-in.
So far it runs well.
I get a little lifter noise on #8 cylinder. Replaced exhaust pushrod with a 60 over and still makes some noise.
I think I will be replacing the rocker shaft. it has a little wear in that end.
The motor specs are
flat top forged pistons
Crane 901 cam
Edelbrock performer intake with Holley 600 Vacuum secondaries.
Headers with 2 1/2 dual exhaust
Pertronix ignition
First real drive other than around the block.
I figure the commute to work and back will help with the break-in.
So far it runs well.
I get a little lifter noise on #8 cylinder. Replaced exhaust pushrod with a 60 over and still makes some noise.
I think I will be replacing the rocker shaft. it has a little wear in that end.
The motor specs are
flat top forged pistons
Crane 901 cam
Edelbrock performer intake with Holley 600 Vacuum secondaries.
Headers with 2 1/2 dual exhaust
Pertronix ignition
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Senior User
Joined: May 2004
Posts: 278
Likes: 0
Thanks for the response.
I am running a C-6, 3.73 gears and have 245/75/16 tires on it now but have a set of 235/85/16 tires that will be going on there soon.
The truck will be seeing most of it's life as a daily drive and to tow my Jeep and maybe a few other things so I was looking to keep the hp/torque range on the lower side to help pull the grades.
I am running a C-6, 3.73 gears and have 245/75/16 tires on it now but have a set of 235/85/16 tires that will be going on there soon.
The truck will be seeing most of it's life as a daily drive and to tow my Jeep and maybe a few other things so I was looking to keep the hp/torque range on the lower side to help pull the grades.
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Senior User
Joined: May 2004
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I wanted 4.11s at first but am very happy with the 3.73s
They even spin up a little on the freeway.
That is why I am going to try out the taller tires on it.
I want to put a tach in the truck to see where I am running the motor.
I am getting a little pinging when the motor lugs in 3rd so I have to retard the timing a little.
I think the motor should have close to 10 to 1 compression with the pistons I installed so pinging under load may be an issue while running on regular gas.
They even spin up a little on the freeway.
That is why I am going to try out the taller tires on it.
I want to put a tach in the truck to see where I am running the motor.
I am getting a little pinging when the motor lugs in 3rd so I have to retard the timing a little.
I think the motor should have close to 10 to 1 compression with the pistons I installed so pinging under load may be an issue while running on regular gas.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
10:1 with a 901 cam? I'm surprised it doesn't ping all the time. Crane recommends 8.0 - 9.5 compression for the 901 cam.
You might have to get your distributor recurved, or just put heavier advance springs in it.
You might have to get your distributor recurved, or just put heavier advance springs in it.
