Mild 460 Cam ?
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Joined: Dec 2003
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From: iowa
This site has a bunch of auto calculators including one for mph, gear ratio, tire diameter and rpm calculations.
https://www.ford-trucks.com/calculat...-mph_rpm/a-gr/
Neil I would guess either your tach or your speedo is way off, using the one I linked above shows to be doing 4800 rpm at 65 mph with a 33" tire you would need 7.25:1 gears (double checked it with another site I use for calculators and came up with the same answer)
Now just playing with some numbers if you have 4.88 gears then at 65mph your rpms would be 3229, AND if by chance your tach is set for a 6 cyl it would read 3200rpm on a V8 as 4800 rpm so those numbers start getting closer. so what I would look for is if your tach is actually set for 6 cylinder operation, or is just for a 6 cylinder instead of for the 8.
Sorry for hijacking it again.
https://www.ford-trucks.com/calculat...-mph_rpm/a-gr/
Neil I would guess either your tach or your speedo is way off, using the one I linked above shows to be doing 4800 rpm at 65 mph with a 33" tire you would need 7.25:1 gears (double checked it with another site I use for calculators and came up with the same answer)
Now just playing with some numbers if you have 4.88 gears then at 65mph your rpms would be 3229, AND if by chance your tach is set for a 6 cyl it would read 3200rpm on a V8 as 4800 rpm so those numbers start getting closer. so what I would look for is if your tach is actually set for 6 cylinder operation, or is just for a 6 cylinder instead of for the 8.
Sorry for hijacking it again.
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Joined: Nov 2008
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From: Nashville NC
Oldracer,
Well, I'm confused now about the tach, but anyways, by the tach when its at 1000 rpm its smooth.
Now the other day for some reason it idle down around 700 & had just a slite lope to it, not anything like a race car, but just a little. Anything above that rpm though, its smooth as can be.
Got a more harder hit out the exhaust as well, sounds good.
I did do some cutting in the exhaust port, opened it up to increase & smooth out the flow, wouldnt call it a port job though.
Neil
Well, I'm confused now about the tach, but anyways, by the tach when its at 1000 rpm its smooth.
Now the other day for some reason it idle down around 700 & had just a slite lope to it, not anything like a race car, but just a little. Anything above that rpm though, its smooth as can be.
Got a more harder hit out the exhaust as well, sounds good.
I did do some cutting in the exhaust port, opened it up to increase & smooth out the flow, wouldnt call it a port job though.
Neil
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Freshman User
Joined: Aug 2008
Posts: 25
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From: New Baltimore MI
Thanks all...I think I'm gonna stick with the 3500 as well. I don't need anything big and im not trying to over do anything...Just wanted a little more low end.
Thanks for all the help that everyones given me.
Justin
New Baltimore, MI
Thanks for all the help that everyones given me.
Justin
New Baltimore, MI
Senior User
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From: Nashville NC
When you ready to put that cam in, mop that tube of lube on the cam real good & put a big blobs on bottom of those lifters. Ol cam need all the help it can get right to start with keep it from wearing & get the bottle of ZDDP additive for the oil when you order the cam.
Neil
Neil
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Joined: Dec 2005
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When you ready to put that cam in, mop that tube of lube on the cam real good & put a big blobs on bottom of those lifters. Ol cam need all the help it can get right to start with keep it from wearing & get the bottle of ZDDP additive for the oil when you order the cam.
Neil
Neil
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Freshman User
Joined: Aug 2008
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From: New Baltimore MI
C Leigh - Thanks for the advice...I'll be sure to do that when i get to putting the cam in.
Jeeps&Fords - As for the Rotella oil for the break in..would you use just the straight 30 weight...or something else? I've always ran there 15-40 weight in both my Oldsmobile and I"ll be sure to start using it in this truck as well. I've always liked there oil.
Justin
New Baltimore, MI
Jeeps&Fords - As for the Rotella oil for the break in..would you use just the straight 30 weight...or something else? I've always ran there 15-40 weight in both my Oldsmobile and I"ll be sure to start using it in this truck as well. I've always liked there oil.
Justin
New Baltimore, MI
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Joined: Dec 2003
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From: iowa
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From: Nashville NC
Monsterbaby, 
I been meaning to ask, your avitar, you put that in to remind us,
if we stick with Jackie D thats what we'll end up looking like.
ol Gentelman Jack.
Now you want to see a real tuff man, check his bag & see if he has Macnaughton, if so then hes grown up two times cause it takes a FULL grown man to drink that stuff.
Neil
I been meaning to ask, your avitar, you put that in to remind us,
if we stick with Jackie D thats what we'll end up looking like.ol Gentelman Jack.Now you want to see a real tuff man, check his bag & see if he has Macnaughton, if so then hes grown up two times cause it takes a FULL grown man to drink that stuff.
Neil
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
MacNaughton's was the first whiskey I ever drank, I didn't think anyone even had heard of it.
Back in the 70s my grandfather worked for a trucking company based in Bremerton WA called Blackball frieght doing P&D. When a truck would get into a wreck the company would offer the load for sale for salvage at cost of the shipping costs, grandpa bought one of those trailers full, ended up with 18 CASES of 1/2 gallon bottles of MacNaughtons. When grandma sold the house and moved into a nursing home 5yrs ago there was still a couple cases left LOL
Back in the 70s my grandfather worked for a trucking company based in Bremerton WA called Blackball frieght doing P&D. When a truck would get into a wreck the company would offer the load for sale for salvage at cost of the shipping costs, grandpa bought one of those trailers full, ended up with 18 CASES of 1/2 gallon bottles of MacNaughtons. When grandma sold the house and moved into a nursing home 5yrs ago there was still a couple cases left LOL
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