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#1
27-02-09, 03:33
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235 vs 261 engines
Hello All,
Questions for the 235 / 261 engines experts, 1) Does the camshaft is the same between 235 and 261 engines? 2) Does the hydraulic lifters requires the same camshaft that for the mechanical lifters? 3) Does the hydraulic lifters has the same length as the mechanical lifters? 4) On a 235 engine which has mechanical lifters, and pushrods which come with, may I change these mechanical lifters by hydraulic ones? Cheers Guy
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Guy aka M38CDNBill 1945 Willys MB 1942 Chevrolet G7107 
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#2
27-02-09, 04:08
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Camshafts made for mechanical lifters have a ramp to take up the clearance and a camshaft made for hydraulic lifters doesn't have it. Being made like this, it's not a good idea to mix them up. I've used solid lifters on a juice cam and they were quite noisy even when the lash was set real close. This will cause premature cam lobe failure. You can do it but it probably won't last as long.
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2
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#3
27-02-09, 19:45
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Cams
I read recently that the 1953 (and presumably 1954) 261 cam was used in the Corvette 235s to improve performance.
I would query if the 1955-1962 Pontiac 'Astro-Six' 261 car engine derivative of the 261 'Jobmaster Six' truck engine had higher lift lobes? The car engine with its higher CR produced up to 152 bhp depending on year, which compares with from memory 135 in the truck engine.
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#4
27-02-09, 21:31
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Cams..
Quote:
When I read this an old memory stirred so looked it up.. I don't think the 235 was recammed but know for sure that Duntov recammed the new 265V8 for '55 to a 3/4 race cam.. I had one..a 265V8.. It was super hot.. You had to have been there in those days..I was.. Read this.. http://www.islandnet.com/~kpolsson/vettehis/
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Alex Blair :remember :support :drunk:
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#5
27-02-09, 21:54
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Alex, speaking of having to be there, that engine that I put the solid lifters in was a 56 Chrysler 354 that I put in a 57 Plymouth 4 door hardtop. In the early 60s it was the coolest rig around.
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2
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#6
28-02-09, 02:19
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The old days..
Quote:
That Chrysler 354 engine was an early Hemi..I had the same engine in a '56 Desoto.. in Chatham,NB..in '64..and then another Chrysler screamer..a Red Ram V8 that I stuffed into a .59 Plymouth..in North Bay in '67..I had the 265 In a '56 Pontiac at the same time..Just couldn't stay away from that old iron.. But the hottest of them all Was a 361 Edsel engine stuffed into an'58 Ford.. had a 4 barrel on it that two men could get inside to adjust.. Couldn't keep transmissions in it til i finally put a four speed out of a '54 Merc 3/4ton.. Had to change the yoke on the drive shaft..had a course spline on that tran end and a fine spline on the diff end..but what a piece of work..No speed shifter but would it ever light up after we got rollin'//    
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Alex Blair :remember :support :drunk:
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