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#1
12-22-2009, 08:35 PM
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Obviously to get 700 cid you are moving the bore spacing? What would the bore spacing be vs the deck height?
Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#2
12-22-2009, 08:42 PM
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Quote:
How do you know we are not doing a W-bore block?  (I think it would be so cool!) Has Ford tried it? I bet they have. I think Lycoming did one. Pretty sure Honda did one. (Just Joking!)I really think talking about bore spacing is superfluous. We do whatever we need to do in order to get the bore/power the customer wants. Even my 455SD SS engine doesnt have the stock bore spacing. It is the first thing a SSer and Ser does for power is to offset the bore. It is why you see lots of blocks in NHRA done with 8 sleeves. Deck height the same thing, whatever fits for the bore and stroke the customer wants. A 400 cubic inch engine with a 10.250 deck height is ridiculous in my book. Everyone knows that a 303-400 short deck is faster, dont they? Lynn Last edited by NHRASuperStock455SD; 12-22-2009 at 08:49 PM. |
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#3
12-22-2009, 09:28 PM
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Yes Lynn, we have looked at "W" Bore Blocks several times over the years. So how much deck do you have left on the block after the .400 short deck?
Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#4
12-22-2009, 11:36 PM
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It really depends on which block you wish ie what bore and stroke desired. Most blocks come with a 0.650 inch deck, so cutting .400 is no problem. However if we rub the sand cores we can add metal in the critical areas. Each block has its own critical factors. Best thing for me to ask is what exactly are you looking for and I will see if we can do it. Lynn |
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#5
12-22-2009, 11:41 PM
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Lynn,call dave and setup shipping.I think I have 250 in it after dave had it cleaned and magged.We can take it off a set of heads when they are ready.Tom
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#6
12-23-2009, 12:07 PM
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Quote:
Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#7
12-23-2009, 01:02 PM
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Tom,the IIA alu blocks were 9.7,a "shorter" block but NOT a short deck.Tom
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#8
12-23-2009, 12:01 AM
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are the rav heads done yet?
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#9
12-23-2009, 03:10 PM
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Quote:
Lynn [email protected] |
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#10
12-23-2009, 03:17 PM
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Lynn did you get my email? Not sure if it was the right email address in my Aol contacts.
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#11
12-24-2009, 01:31 PM
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Go it Exil. Question for everyone. I have made the RA-V intake the stock height as it seems all Pontiac engines including the crate motor all had the same height so that they could go into any chassis config. Any thoughts? Lynn [email protected] |
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#12
12-24-2009, 02:46 PM
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Lynn,I have a brand new shortdeck sheetmetal 2-4 intake you can borrow if you build a motor.Tom
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#13
12-23-2009, 01:25 PM
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Its my understanding that a BBC is 9.8 and a tall deck is 10.2 ???
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#14
12-23-2009, 01:36 PM
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Man I had a bunch of mixed concepts in my typing that time.
I was thinking -.400 from a traditional Pontiac 10.243 would be about 9.8 but many think that the Ford 9.2 deck is a better deal all around so it you were going to do a short deck then do a 9.2 vs a 9.8. It never came out that way though. LOL Too late to learn how to type correctly and sometimes too lazy to proofread properly. Thanks Tom S and Cgeise. Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#15
12-23-2009, 03:00 PM
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I know the IA-II blocks have about 0.650 on the deck. I dont see what is wrong with going down to 9.800. The Hemi guys do it all the time. They have the same deck thickness and often go from 10.750 down to 10.200 to 10.300. The really fast ones rub the sand molds and get down to 9.800. Makes for a really light piston for that short 3.75 stroke.
Lynn |
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#16
12-26-2009, 01:29 PM
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Cool thanks Tom, on your short deck street engines what compression ratio seems to be working out? Tom V could probably answer another question, but we have always used the fact that a turbo doubles cubic inch relative size by enhancing induction like a big cubic inch engine draws air. So what pounds of boost is required to double relative cubic inch size?
IE....300CID = 600 CID or 400CID = 800CID @ X lbs of boost. X = ? (my guess is 12?) |
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#17
12-26-2009, 01:36 PM
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I try and stay with 9.5 on a N/A engine with 91 gas.I think my current engine is 10.1 and seems OK.Tom
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#18
12-26-2009, 06:14 PM
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My guess, X = 14.7 psi.
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#19
12-27-2009, 12:02 PM
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Lynn, tell me what the mass flow is for the 300 cid engine and the 400 cid engine and I will give you the answer, LOL
Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#20
12-27-2009, 04:09 PM
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Quote:
Lynn |
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