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Old 03-23-2019, 11:12 AM   #1
Hacksaw
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Default Re: H-I-J '76 Nova re-fit.

Is there some way you can fill the slots in the lifter bores other than using bronze bushings? With todays chemicals, I would think there must be something that should work.
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Old 03-23-2019, 11:28 AM   #2
FED 387
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Default Re: H-I-J '76 Nova re-fit.

I know you don't want to hear this but maybe its time to get another block and start over unless you want to do bronze bushings---not sure what your guy will charge you but doing 16 lifter bores in labor & the cost of the bushings can get kind of expensive---you will still have your rotating stuff and heads etc so all you are really doing is getting to the point where you have a straight good block to work from---you want to do any tricks you can always do that but there has to be a ton of good SBC blocks you can choose from and move forward on your project---as somebody suggested go back to the basics and go on from there---FED 387
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Old 03-23-2019, 11:55 AM   #3
Pat6868
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Default Re: H-I-J '76 Nova re-fit.

That engine will live grooved bores and all. Pay attention to lifter bore diameter, push rod hole size, oil drain back, oil viscosity. Good quality solid lifters (no hole), quality standard volume, standard pressure pump. Good starter or back up engine. Put it together and have fun. Not gonna cost that much.
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Old 03-23-2019, 02:48 PM   #4
Jim Hanig
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Default Re: H-I-J '76 Nova re-fit.

Just a though ,make sure the screw in plugs in the front are not in to deep, Center one .
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Old 03-23-2019, 06:33 PM   #5
Nmbr1GMfan
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Default Re: H-I-J '76 Nova re-fit.

Quote:
Originally Posted by Jim Hanig View Post
Just a though ,make sure the screw in plugs in the front are not in to deep, Center one .
Yes, they were checked carefully.
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Old 03-23-2019, 06:42 PM   #6
Nmbr1GMfan
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Default Re: H-I-J '76 Nova re-fit.

It was nice to get away from the engine for a day (we'll be back to that tomorrow) Autumn and I went down to work on the car today. Although I may get hamered here for this kind of work, we had a nice afternoon cleaning the underneath/underhood of the car.

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Old 03-23-2019, 07:08 PM   #7
Dissident
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Default Re: H-I-J '76 Nova re-fit.

Todd,
Someone mentioned that the thing would live.....but recent history doesn't support that notion. If you were running on the dyno at 600rpm/sec and going from 4000 to 7500, that only takes 5.833 seconds at 300rpm/sec twice that time. SO, if you total the pulls in time, that is not a livable package.Normal lifter to bore clearances is where a normal leak occurs. If it is sloppy, as an example 0.002", that leakage is approx equal to a jet of about 0.058" diameter oer lifter bore/lifter and that is additional to the groove that somebody increased the leakage path with. That flow number would scare most folks.Not a good package at all. IF you had the block reamed and honed for larger lifters, it would probably take a 0.904" lifter to clean up the groove leak. Yeah, not legal, but might save the block but would cost for another set of lifters and the cost of increasing the lifter bores. BTW - all that leakage and resultant deluge drops right down on the rotating assembly and the windage losses go up exponentially with RPM.


The lifter/bore flow above is in excess of 8gpm!!!


Best of luck to you and Autumn. Hope you get to race soon.

Regards,
HB2
Dissident

Last edited by Dissident; 03-23-2019 at 07:16 PM. Reason: number shuffle
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Old 03-23-2019, 06:31 PM   #8
Nmbr1GMfan
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Default Re: H-I-J '76 Nova re-fit.

Quote:
Originally Posted by FED 387 View Post
I know you don't want to hear this but maybe its time to get another block and start over unless you want to do bronze bushings---not sure what your guy will charge you but doing 16 lifter bores in labor & the cost of the bushings can get kind of expensive---you will still have your rotating stuff and heads etc so all you are really doing is getting to the point where you have a straight good block to work from---you want to do any tricks you can always do that but there has to be a ton of good SBC blocks you can choose from and move forward on your project---as somebody suggested go back to the basics and go on from there---FED 387
The pistons and this block are pretty much junk without each other, so if I have to get a block I have to buy pistons and vice versa. IMO, It will be fine when I get the oiling straight, it ran before. I just need to make this reliable so I have a spare. When it runs I'll start with a Dart block and all new internals.
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