What cools your engine?
Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
Back the timing off. You may not be hearing the detonation. What do the plugs look like? Take it out for a normal rpm run, then shut it straight off and coast to the side of the road. Pull a plug and see what it looks like. If it's bone white, your timing is too high. Or Just go the easy route and set the timing with a timing light.
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Elder User
Joined: Oct 2009
Posts: 871
Likes: 1
From: New Albany, MS
Good points, I do have a timing light somewhere, what would be a good starting place, for a basically stock 460 (Weiand Intake and mild cam)?
Also since ya'll seem to be more learned than me in the area of motors, why does my 460 fall on it's face when I floor it off of idle? If I slowly get on the throttle I don't I have a problem but if I through all the coal to her at once, its spit sputter, and often go dead. It runs great other wise though.
Also since ya'll seem to be more learned than me in the area of motors, why does my 460 fall on it's face when I floor it off of idle? If I slowly get on the throttle I don't I have a problem but if I through all the coal to her at once, its spit sputter, and often go dead. It runs great other wise though.
Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
Good points, I do have a timing light somewhere, what would be a good starting place, for a basically stock 460 (Weiand Intake and mild cam)?
Also since ya'll seem to be more learned than me in the area of motors, why does my 460 fall on it's face when I floor it off of idle? If I slowly get on the throttle I don't I have a problem but if I through all the coal to her at once, its spit sputter, and often go dead. It runs great other wise though.
Also since ya'll seem to be more learned than me in the area of motors, why does my 460 fall on it's face when I floor it off of idle? If I slowly get on the throttle I don't I have a problem but if I through all the coal to her at once, its spit sputter, and often go dead. It runs great other wise though.
As for the spit/sputter deal, what size and type carb are you running? Vac, dp, holley, demon?? Sounds like it's jetted a little rich and needs some tuning. There are several things to check but I need to know what carb 1st. Basically when you ease in the motor is building power, the fuel demand is kept on track, but when you dump the throttle it's trying to pour all the fuel from the accelerator pumps and secondarys all at once flooding the motor. Changing the pump cams and jets will fix all that.
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Elder User
Joined: Oct 2009
Posts: 871
Likes: 1
From: New Albany, MS
The carb is a 670 Holley, I actually richened the jets by two sizes which made my MPG's drop, but the engine builder said the go up a few sizes, and thats why I did it. It was stumbling before that though so I don't know if changing the jets did much other than kill gas mileage. I don't know if that changes the diagnoses any.
Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
You need to read your plugs to verify. dp or vac secondary carb? If dp, is the secondary power valve got a plug in it? What size jets in it now? Need to know a bunch more info to get you close.
Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
Holy crap! You have WWAAYYYYY to much spread from front to rear. That's a big part of your problem. I'm guessing you originally had 68/89 jets. If it runs good at low rpm and is just rough at the upper end, swap back to the 89 jets in the rear and see how it does. Like I said before, you need to read your plugs and see what it's doing. Do you still have the destructions for the carb? Might want to go back and read them again an look over the tuning section.
http://www.holley.com/data/Products/...0268-4rev2.pdf
As it goes right now, check and adjust timing along with adjusting the carb and I can almost guarantee your hot running problems will be fixed.
http://www.holley.com/data/Products/...0268-4rev2.pdf
As it goes right now, check and adjust timing along with adjusting the carb and I can almost guarantee your hot running problems will be fixed.
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Elder User
Joined: Oct 2009
Posts: 871
Likes: 1
From: New Albany, MS
I do have the destructions. I will read the plugs this weekend when I get back to the truck. The way too much spread part, are you suggesting to keep the 70's in the front and just change 93's back to 89's?
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Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
you can try it and see. Set the timing 1st before you do anything. Then go get a couple of new plugs and just change 1 that you can get to easily. Run it at idle for a few minutes, shut it down and look at the plug. Should be nice and light greyish. Next, run it at normal rpm and shut right off without letting it come to an idle. Read the plug. Swap in a new one, and take it out for a hard launch and run it ar wot for a few seconds shutting it right off without going to an idle. It should still be nice and ashy grey. If it's black it's too rich. Pure while, too lean. Then we can change carb settings from there.
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Elder User
Joined: Oct 2009
Posts: 871
Likes: 1
From: New Albany, MS
Ok dialing the timing back solved the major overheatig issue, but it still gets a little hot. Runs around 190-200 down the road with a 160 thermostat, and temperture creeps up at idle. I know I need a fan shroud for sure I am going to fix my old one hopefully.
Do you think 195-210 is too hot for a 160 driving down the road? The heat today was 106 before the heat index so that probably is contributing. The other thing that Ive been thinking is my temp sender is screwed into my intake by the water neck.. Could my gauge be reading a little hot because it's reading the temp right before the radiator? Anyway I appreciate yalls help.
Do you think 195-210 is too hot for a 160 driving down the road? The heat today was 106 before the heat index so that probably is contributing. The other thing that Ive been thinking is my temp sender is screwed into my intake by the water neck.. Could my gauge be reading a little hot because it's reading the temp right before the radiator? Anyway I appreciate yalls help.
FTE Chapter Leader
Joined: May 2006
Posts: 11,273
Likes: 99
From: North Dakota
Do u have a high flow stat? 200 is warm for a 160.
I'm having heat issues too, I have a 180 high flow stat, n at idle with the A/C going, it runs 190 ish in 90* weather. I had my timing at 14* without vac advance hooked. I just today dropped it down to 10* after a short chat with Kris. Idk what my distributor curve is, as it's stock. But I have a mechanical fan, bolted directly to the pump. Never really got hot just with the van running down the road, just pulling. Im hoping the timing change helps mine out.
If I where u, get that fan shroud back on, and maybe put a 180* high flow stat in. I've never had a 160 stat work like it should. Always ran190-240* on the rigs I've tried 160s in. Better luck with 180s.
I'm having heat issues too, I have a 180 high flow stat, n at idle with the A/C going, it runs 190 ish in 90* weather. I had my timing at 14* without vac advance hooked. I just today dropped it down to 10* after a short chat with Kris. Idk what my distributor curve is, as it's stock. But I have a mechanical fan, bolted directly to the pump. Never really got hot just with the van running down the road, just pulling. Im hoping the timing change helps mine out.
If I where u, get that fan shroud back on, and maybe put a 180* high flow stat in. I've never had a 160 stat work like it should. Always ran190-240* on the rigs I've tried 160s in. Better luck with 180s.
Post Fiend
Joined: Oct 2003
Posts: 6,949
Likes: 1
From: utica il
my 85 had a 3'' body lift and no fan shroud with a no clutch flex fan. always ran 180ish thermostats in the 466 and i don't think it ever got to 205 even in summer muddin'. it did have a honkin' **** huge aluminium radiator in it though.
do a little googling on those 670 truck avengers. iirc they had a few crappy production runs that got recalled. i think 73 ford ghey had a metric shyte ton of issues with his, and karl is going to hate this, proeliator helped set him straight on the jet sizes and some other trickery on pirate. carb and timing sound like the issues, but that ain't anything i can help you with....
do a little googling on those 670 truck avengers. iirc they had a few crappy production runs that got recalled. i think 73 ford ghey had a metric shyte ton of issues with his, and karl is going to hate this, proeliator helped set him straight on the jet sizes and some other trickery on pirate. carb and timing sound like the issues, but that ain't anything i can help you with....
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Elder User
Joined: Oct 2009
Posts: 871
Likes: 1
From: New Albany, MS
Major overheating today I cobbled together a fan shroud and drive about twenty miles to the wheelin spot. By the time I got there it was running 230. I think with the winch blocking the condenser and the condenser blocking the radiator, it isn't moving enough air.
I think my only hope is to up the surface area of the radiator maybe by plumbing in another small radiator in the bed.... Maybe.
I will add.
It was 104 today.
I was not running ac.
I was running the heat to pull off a little extra heat.
I think my only hope is to up the surface area of the radiator maybe by plumbing in another small radiator in the bed.... Maybe.
I will add.
It was 104 today.
I was not running ac.
I was running the heat to pull off a little extra heat.
Post Fiend
Joined: Oct 2003
Posts: 6,949
Likes: 1
From: utica il
two radiators is not the solution this problem man. you said a more or less stock 460 right? ain't no way in hell it's making enough power(heat) to require duals. something is wrong and all you'd do with another radiator is mask the damn problem.