350 engine deck

[elisalvador]

hi , i have a 350 that im stroking to 383
i had the machine shop deck the block , so the piton sits .015 in the whole,
i installed the heads , and im using .040 thick mls gaskets. the problem im having is that im ready to instal the intake manifold, but were the intake meets the block, is very tight,
were talkin .006 of gap between intake and actual block surface and the intake sits a little funny , the bolt wholes kinda sorta lign up , i got the the manifold to bolt. but i noticed
the mating from intake to heads was not tight it was tight on the top portion of the manifold
but the closer it got to the block the mating gap had increased, im confused on whats going on here, does the block need to be resurfaced were the intake meets, or does the intake manifold
need machining .. thanks :?

 

[grumpyvette]

what your experiencing is very common with milled heads or a milled deck block, the distance changed from the stock location and geometry, in effect the heads moved closer to the crank center-line effectively making the distance between the heads less and the lifter gallery tighter moving the stock intake matching surface up higher on the heads as the intake flange width is up till now remaining at the stock width
the cure is to have both intake to head mating flanges machined a few thousands to get the relation ship back to stock, but that will obviously mean the intake will only fit that engine perfectly unless thicker intake gaskets are used if that intakes ever used on a different engine.
your local machine shop will be familiar with the changes to the intake manifold width required if they milled the block

TWO BOLT MAIN CAP BLOCK

4 bolt SBC block

you might want to read thru this link
http://www.hotrod.com/techarticles/engi ... omparison/

viewtopic.php?f=50&t=2988&p=9055&hilit=milling+angle#p9055

http://www.hotrod.com/how-to/engine/hrd ... omparison/

 

[elisalvador]

thanks, again, ill have the manifold machined then , thanks

 

[chromebumpers]

what your experiencing is very common with milled heads or a milled deck block, the distance changed from the stock location and geometry, in effect the heads moved closer to the crank center-line effectively making the distance between the heads less and the lifter gallery tighter moving the stock intake matching surface up higher on the heads as the intake flange width is up till now remaining at the stock width
the cure is to have both intake to head mating flanges machined a few thousands to get the relation ship back to stock, but that will obviously mean the intake will only fit that engine perfectly unless thicker intake gaskets are used if that intakes ever used on a different engine.
your local machine shop will be familiar with the changes to the intake manifold width required if they milled the block
you might want to read thru this link
viewtopic.php?f=50&t=2988&p=9055&hilit=milling+angle#p9055

That's one long sentence Grumpy! :lol: :lol: :lol:

 

[grumpyvette]

sorry, punctuation , capitalization and paragraphs, were never my strong point, I had a secretary, as an engineer that took and made the stuff I wrote far more legible, she eventually just gave up trying to get me to do more than clearly post the response, information to questions or proposals in our department.
I got away with it mostly because I was really really good at my job in all the other areas required, and most info, being passed along was on a face to face on site basis in the department