07-20-2020, 01:39 PM | #1 |
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Location: Warsaw IN
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bore spacing
Hi folks, first I have to give a retraction. I had stated that I was getting a 24 port 24 valve cross flow head for my 292. I was looking at an airplane head or something else. The head I'm actually getting is a 12 port 12 valve aluminum cross flow. On one of the "I'm smarter than anybody and your an idiot" forums it was stated that the bore spacing on the head would never work on an I6. Freaked out a little I called Ryan Falconer today and ask him. It's the same. In the process it accrued to me that the I6 and the SBC have the same bore spacing. Was this a product of the manufacturing and/or the casting process when they started producing the SBC?
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07-20-2020, 04:20 PM | #2 |
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Re: bore spacing
Small blocks came years before the late six but evidently the engineers kept the bore spacing.
I'm thinking that someone cut the ends off small block heads To bolt them to a late six back in the 70's. This is one that Rotten Leonard on the Hamb was building
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
07-20-2020, 08:00 PM | #3 |
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Re: bore spacing
i have worked in engineering/manufacturing most of my career and I can tell you that derivative designs are really common, I have seen aircraft design engineers take lofts from older aircraft designs and I have personally seen the production line pin locations on trucks 35 years apart line up exactly. it wouldnt surprise me at all if the spacing was the same on purpose, because if it works dont fix it!
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07-20-2020, 09:29 PM | #4 |
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Re: bore spacing
I also just noticed that after over 40 years of owning my truck that the 235 is 2" off center to the right?
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07-20-2020, 10:05 PM | #5 | ||
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Location: Lakes Region NH
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Re: bore spacing
Quote:
Here's a partial list of engine families using 4.4" bore spacing: Smalblock Chevrolet, 262 through 400 ci Chevrolet I6 including 235, 250, and 292 ci GM 60 degree V6 including 2.8l through 3.9l engines Quote:
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07-21-2020, 01:19 AM | #6 | |
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Re: bore spacing
Quote:
Chevy = All of a certain year and model had the same stuff or the HD package had bigger stuff.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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07-23-2020, 12:19 PM | #7 | ||
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Re: bore spacing
Quote:
Quote:
i won a 64 for wagon in a poker game, i had no use for it and sold it to a friend that needed a motor for his ford van. he pulled both motors before figuring out the motor wouldn't fit. luckily he was able to sell everything to recoup his money
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07-23-2020, 12:23 PM | #8 | |
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Re: bore spacing
Quote:
i believe the new sbc will bolt up to the old belhousings with the exception of the top bolt not gm but the aftermarket also makes the sbc 454
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07-23-2020, 12:32 PM | #9 |
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Re: bore spacing
I'm just thinking that I might have to make a road trip to hear Mick's engine run some day. I've wanted to do a road trip to Indiana anyhow.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
07-23-2020, 02:53 PM | #10 |
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Re: bore spacing
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07-23-2020, 10:13 PM | #11 |
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Re: bore spacing
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