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Engine angle?

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clintonvillian
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Engine angle?

Post #1 by clintonvillian » Tue Jul 28, 2020 8:06 pm

When I setup my F100 it had really stiff springs up front.

I set the motor level, and the pinion angles to match. After I got all of the sheet metal, the front of the truck needed to drop a few inches to get the stance correct.

Now my motor slopes downhill toward the front of the truck. Close to 3/8" across the top of the head.

Do I roll with it? Should I drop the transmission some to level it back up?

If I do the pinion angles will no longer match, I'll have to shim the rear axle...or not.

Thoughts?
Last edited by clintonvillian on Tue Jul 28, 2020 9:06 pm, edited 1 time in total.

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bubba22349
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Re: Engine angle?

Post #2 by bubba22349 » Tue Jul 28, 2020 8:58 pm

Idealy starting with the chassis at ride height before setting all the angles is the best way to go, however with the engine at 3/8 inch downward angle it could still work okay. IE like with many older stock chassis cars that were setup with the chassis level and they originally used the same size tires all around. Later someone installs a set big and littles (tires) and gives the car a downward rake thousands of cars were done this way and they seem to run fine. Best of luck. :thumbup: :nod:
Even a bad day Drag Racing is still better than a good day at work!

Current project is a 1988 John Deere 420 Garden Tractor I need a few small parts to get it fixed, plus some cosmetic items, maybe a few attachments, if you happen to have or know of JD 420 parts would welcome the help!

My Ex-Inline 6 Fleet 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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THE FRENCHTOWN FLYER
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Re: Engine angle?

Post #3 by THE FRENCHTOWN FLYER » Tue Jul 28, 2020 11:11 pm

I'd find a way to level the carb pad and address the air pocket in the back of the head.
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING

BigBlue94
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Re: Engine angle?

Post #4 by BigBlue94 » Wed Jul 29, 2020 11:07 am

Can you raise the engine up? That would give the same results as lowering the trans, without much of a pinion angle change at all.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

clintonvillian
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Re: Engine angle?

Post #5 by clintonvillian » Wed Jul 29, 2020 11:09 am

THE FRENCHTOWN FLYER wrote:I'd find a way to level the carb pad and address the air pocket in the back of the head.


If I run EFI will the plane matter?

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wallen7
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Re: Engine angle?

Post #6 by wallen7 » Wed Jul 29, 2020 1:18 pm

I think that what FTF was talking about was having air trapped in the back of the head. It will over heat the rear cylinder unless it has coolant. Ford built them with the carb pad level. When I was racing we installed the engine a nd transmission tilted 3 degrees down in the rear and worked the angles from there.

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THE FRENCHTOWN FLYER
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Re: Engine angle?

Post #7 by THE FRENCHTOWN FLYER » Wed Jul 29, 2020 2:26 pm

I was thinking carbed. EFI doesn't care - you can run the engine upside down for all the injectors will care.
As for tilted down in front I have done this and I ran a 1/4" line from the top of the rear of the head to the gooseneck to vent the air. I tapped a 1/8" pipe fitting hole adjacent to the last head bolt boss.
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING

arse_sidewards
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Re: Engine angle?

Post #8 by arse_sidewards » Mon Aug 03, 2020 7:53 am

Park it on a slight uphill or ramps when you fill the coolant. You should do that anyway so you can just top it off all from the radiator cap without having to wait several cycles for the air to come out of the heater core. The 300 doesn't really have problems with trapped air. Even if you fill it on flat ground I wouldn't worry about 3/8" over the length of the engine.
1994 F150 4x4 8ft, engine is basically stock.

66" leafs, extended radius arms, lockers in both ends, nothing special.

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