Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller.. - Chevelle Tech
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post #1 of 11 (permalink) Old Oct 18th, 19, 4:35 PM Thread Starter
 
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Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Pump Gas BBC 475CID (4.350 x 4" x 6.535") AFR 265 Out of the Box, Straub GTA Semi custom hyd roller .600/.600 243 @ .050" on a 109, Morel 5374, Dart Block fully prepped, Victor 2904, AED 850, B&B Oil pan, Straub Crank and H-Beam rods. Goal was 600HP. Going to AL to live in a Camaro!!!
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Jerry Briggs and horton409 like this.

Chris Straub
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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #2 of 11 (permalink) Old Oct 19th, 19, 10:50 AM
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Todd
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Why was a Dart block used for such a small big block? No good GM cores available?

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post #3 of 11 (permalink) Old Oct 20th, 19, 9:38 PM
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Very nice. Should be a lot of fun. If it’s anything like my straub street set up, start buying rear tires now.
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post #4 of 11 (permalink) Old Oct 20th, 19, 11:04 PM
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Jason
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Quote:
Originally Posted by 496blaze View Post
Why was a Dart block used for such a small big block? No good GM cores available?
Im guessing the customer maybe already had pistons?

Otherwise, you are right. Why not go straight to a 4.500 bore and pick up displacement and power and still have plenty of room for rebuilds.

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post #5 of 11 (permalink) Old Oct 21st, 19, 10:16 AM Thread Starter
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Quote:
Originally Posted by 496blaze View Post
Why was a Dart block used for such a small big block? No good GM cores available?
The customer wanted a Dart block.

Chris Straub
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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #6 of 11 (permalink) Old Oct 21st, 19, 11:47 AM
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Gary
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

i agree with the guys above. why in the world would you not run atleast a 4500 bore. i wouldn't even consider smaller than that. otherwise great combination and power
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post #7 of 11 (permalink) Old Oct 21st, 19, 11:55 AM Thread Starter
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Hotrodding roots come from being different and building something that you wanted, not what somebody else had. We all want what we want. Customer wanted 600HP and a Dart block. Hotrodding goals achieved.

Chris Straub
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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #8 of 11 (permalink) Old Oct 21st, 19, 12:07 PM
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Quote:
Originally Posted by gnicholson View Post
i agree with the guys above. why in the world would you not run at least a 4500 bore.

I see nothing wrong with the small bore or the Dart block. By the time you find a decent used 40 year old GM block and do all of the prep work and machining you are not that far off from the Dart. As far as the bore size goes 4.500 bore does not leave a lot of room between cylinders for gasket seal plus not everyone wants or needs any more power. This should be a very nice reliable street engine

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post #9 of 11 (permalink) Old Oct 21st, 19, 12:45 PM
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Scott Foxwell
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

600hp, 620 tq...not many street cars, even with contemporary aftermarket suspension and tires, can use all that power on the street and very few people have any idea what that kind of power is like.
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post #10 of 11 (permalink) Old Oct 21st, 19, 1:22 PM
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Chris
 
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Re: Pump gas BBC 475 CID with AFR265/Straub GTA Hyd roller..

Why only taken to 5500? Power was still climbing judging from the torque peak, I'd assume peak HP would be close to 6000 rpm.

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post #11 of 11 (permalink) Old Oct 21st, 19, 6:37 PM
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Quote:
Originally Posted by cstraub View Post
Hotrodding roots come from being different and building something that you wanted, not what somebody else had. We all want what we want. Customer wanted 600HP and a Dart block. Hotrodding goals achieved.
Hey, let’s keep this in mind when we chat about my standard deck height, factory block, 4.5” stroke 525 build 😉

I want it to run like a Buick, powering into those 2.56 gears on 255/60 radials using a very small converter.
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