Motor mounts, and brake booster

Kinja'd!!! "The Swedish Bandit" (swedishbandit)
04/08/2020 at 19:50 • Filed to: joy

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Continuing from my interior work we’re moving back out to the engine bay.

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First up was the motor mount situation. The original 76' 350 pontiac the car had had a 3 holes for the motor mount. The new 65' 389 going into the car only has 2 holes for the mount and they are in a completely different spot than the 350.

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So with some backyard engineering a new mount was designed that would allow the new motor to sit in the same location as the old one.

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Made out of some really thick square tubing. These thinks won’t give up easily.

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Test fitting the mounts . As of right now they don’t make any po lyurathane mounts for P ontiac cars. However I was able to buy some from some 90's C hevy v8 and then modify them to fit the Pontiac mounts.

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After some edge cleanup and paint.

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Engine is permanently mounted and sitting rock-solid. Really happy with how these turned out.

Now with the engine mounted in the correct spot we can move on to the next issue; the brake booster touching the valve covers.

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This is because of the roller rocker arms I’m running I had to raise the valve covers up with a spacer to avoid interference . but this of course had it’s own set of issues as they were now touching the booster.

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Luckily I had just scrapped a 90's Chevy 3500 van so I just happened to have a hydrobooster laying around.

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The hydrobooster would give me tonnes of space but it also came with some issues of it’s own.

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Main issue was the mounting plate which didn’t fit the firebird at all.

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But after some small modification

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It fit like a charm

The hydrobooster also eliminates another problem I’ve had. With the old engine I ran such a hot cam so I almost never had any vacuum for brakes when I needed it. With the new motor I’m running an even hotter cam so I didn’t expect the vacuum to be any better. A hydrobooster eliminates this problem altogether and I can run it of the original power steering pump so the hp loss will be minimal.  


DISCUSSION (4)


Kinja'd!!! Ready for an adventure! > The Swedish Bandit
04/08/2020 at 20:18

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I LOVE the look of the paint on the motor mounts! Could you please te ll us what brand and flavor that is? Great work!


Kinja'd!!! The Swedish Bandit > Ready for an adventure!
04/08/2020 at 20:23

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Uhhm black? Honestly it’s just some cheapo se migloss black bought at biltema (S weden’s version of harbor freight). I usually paint all my smaller details  with this paint. Not the best, but quick and cheap to put on.


Kinja'd!!! Ready for an adventure! > The Swedish Bandit
04/08/2020 at 20:26

Kinja'd!!!0

LOL - I hadda ask because there’s a dude here in the hood that says ya have to use certain such-and-such for this, such-and-such for that, and the paint job you did looks like it came out of one of his $20.00 spray cans he touts...


Kinja'd!!! The Swedish Bandit > Ready for an adventure!
04/08/2020 at 20:33

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Ha ha okay, not bad for an $8 can then I guess. I have a hard time with guys that say things like that. I’d rather just do it with whatever I can get a hold of and if it turns out it’s not up to par I’ll simply redo it with a different product.