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#276 | |
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
Quote:
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#277 |
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Location: Toppenish, WA
Posts: 15,538
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Re: Eliminate draft tube options
Only if the torque on launch dictates the need. That same motormount setup worked in two ton trucks coming out of fields well overloaded in compound low with engines putting out all the torque they could muster without failures. At least I never heard of them failing. Leaking oil compromising the rubber was normally the reason for failure. At least every one I seen that was bad was oil soaked. That isn't likely to happen on that engine.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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#278 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,647
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Re: Eliminate draft tube options
Considering the quality of new parts these days, anything could happen.
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#279 |
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Location: Toppenish, WA
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Re: Eliminate draft tube options
It doesn't take much effort or $ to install a chain to keep the engine from torqueing over too much and that is old school tech. You just leave enough slack so that the chain stops it from moving too far but still lets it move normally.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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#280 |
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Join Date: Mar 2022
Location: Surrey BC
Posts: 816
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Re: Eliminate draft tube options
With the cable throttle torque reaction of the motor won't pin the throttle open.
Anyone reading this with a solid rod throttle setup: the key safety thing for you is to make sure the link between firewall and engine is angled so that if the motor rises up after a mount brakes the arc of the link moving closes the throttle, not opens. With new mounts I'd just keep an eye on them. Or weld a tab to the cross member to limit how much the motor can twist if RR mount breaks. Or run the ignition wire so it unplugs itself if the motor flops over. That is a very pretty engine bay, a chunk of chain is going to look off. |
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#281 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,080
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Re: Eliminate draft tube options
as for new motor mounts, they don't make'em like they used to...
a short length of cable with pressed on ends and possibly covered with black shrink tube or the like would not be noticed too much under the hood, wouldn't rattle or remove paint etc. it's just a suggestion because I have see and worked with the "new" motor mounts for that truck and thought about how they didn't look as tough as they did in "the old days" and thought about the extra torque your new motor with the supercharger would have. it would be a shame to have something let go and not be ready for it, thats all. like LG says, new mounts, keep an eye on them. |
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#282 | |
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
Quote:
I like the idea of a cable versus a jangling chain. Could I attach it to the block on the drivers side where the three bolt side motor mount holes on the block already exist? Where on the frame would it be attached? Since this hot rod inspired truck isn't going to have bumpers, there are existing holes in the frame for the bumper bracket bolts. How heavy/gauge of a cable would I need?
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#283 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: Eliminate draft tube options
Obviously the higher up on the engine the better the leverage would be. It also doesn't need to be located at the front.
I think 3/8 cable would be fine with swaged steel ends. Attaching to the web if the frame is best, or a crossmember. Think of where it will achieve the best leverage advantage. |
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#284 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,647
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Re: Eliminate draft tube options
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#285 | |
Senior Member
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
Quote:
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#286 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,647
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Re: Eliminate draft tube options
I’d wait until everything is in place and figure it out last. Could save doing it over.
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#287 |
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
Yeah, thats what I'm thinking. The headers and the intake manifold for the supercharger make things a bit challenging. Just this morning I had to modify the spin-on oil filer and associated hoses as the way the builder installed them, they interfered with the rear header section.
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#288 |
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Location: Lucas, TX
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Re: Eliminate draft tube options
As I prepare to mount the headers and intake manifold, I have a question. Should I use any kind of gasket sealant between the head and the silver three piece gasket? Between the gasket and the headers/intake?
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#289 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,080
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Re: Eliminate draft tube options
post 284 is what I was talking about. looks decent. good idea to leave that till last so it doesn't interfere with anything.
I don't usually use anything on a header gasket. some guys use the heat resistant silicone as a thin layer on the gasket contact surface. some bue loctite on the threads of the fasteners may be a good idea. |
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#290 |
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
Progress is being made albeit at my pace.....LOL. Intake and headers mounted, along with starter and McCulloch supercharger. Lots of wiring left to do and I'm re-thinking the plumbing of my fuels lines (feed and return) along with the hoses that were previously used for the boost line coming from the sealed carb to the fuel pressure regulator.
I also had the engine builder insert a freeze plug and PCV in the former home of the road draft tube. I plan on using some tubing to plumb the PCV up the side of the engine, across the thermostat area, along the valve cover and over to the intake fitting. So plenty of plumbing and wiring left to do.
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#291 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: Eliminate draft tube options
Looks really nice. Take your time and work through it, thinking of how one thing affects another.
One thing I always try to think of when doing that kinda stuff is how engine vibration affects things. Like the oil pressure sender manifold. Over time will the fitting crack and break causing oil to pump out before you realize it and then it's too late? It only takes a minute to make a brace or whatever. |
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#292 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,647
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Re: Eliminate draft tube options
Pcv and road draft tube.
What do you have for a baffle under the pcv? |
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#293 |
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Location: Lucas, TX
Posts: 517
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Re: Eliminate draft tube options
As I recall there was a piece of sheet metal that was attached to the underside of the block shielding old from being splashed and drawn into the road draft tube/PCV
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1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere." |
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#294 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,647
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Re: Eliminate draft tube options
You might get lucky and not pull oil into the pcv.
I used a section of clear hose on my pcv line to monitor any oil movement. And for your tubing, why run it forward? Plenty of room around the back. |
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