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Canadian Poncho Homepage -> Canadian Poncho -> Off Brand Parts For Sale -> DOUBLE BUMP 202 HEADS
Post Info TOPIC: DOUBLE BUMP 202 HEADS
wagon64sd


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DOUBLE BUMP 202 HEADS
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RAN FINE ON THE MOTOR LAST 3 CASTING #`S 291..$250

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2drpost


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bill, pm sent, i may be interested....where are you located?

and do you have a casting # off the intake also?....your 'intake' picture looks like a hurst shifter. wink

-- Edited by 69 belair on Tuesday 23rd of June 2009 07:41:11 PM

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Elroy


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Are they 202's ? The double bump just means they are the small chamber big valve heads but they are usually 1.94 intake valves in those heads

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73SC


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If  a picture of the valve side was shown we could soon tell, 2.02 /1.60 basically touch , the 1.94/ 1.5 have a small space between them.

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
68 427


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I HAVE A SET OF THESE HEADS IN MY SHED. MINE ARE STOCK WITH THE 1.94/1.5 VALVES. DID THEY ALSO COME STOCK WITH THE BIGGER VALVES? I KNOW ALOT OF PEOPLE BELIEVE DOUBLE BUMP MEANS 2.02. I THOUGHT MINE WERE 2.02 UNTIL A FRIEND INFORMED ME THEY WERE NOT. I CHECKED THEM AND HE WAS RIGHT THEY WERE NOT.

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   MIKE
73SC


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Double hump, camel back whatever they are called came in two valve variations depending on engine & casting #, 1.94/1.5 or 2.02/160.

-- Edited by 73SC on Tuesday 23rd of June 2009 10:38:53 PM

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
ak 67sd


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I thought they could have the same casting numbers but some were 1.94 others 2.02... 1.94 would be more common too i would think...

ak

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Wpg, MB to London, ON

Numbers don't match! Especially HP and ET. 
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Beaumont4008


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From the by the numbers book;        Looks like everyone is correct, available with 194 or 202.



img163.jpg

 

img164.jpg



-- Edited by Beaumont4008 on Wednesday 24th of June 2009 12:17:44 AM

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73SC


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So we still need a picture of the valve side to tell for sure what's in these 291's.

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
Beaumont4008


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73SC wrote:

So we still need a picture of the valve side to tell for sure what's in these 291's.


Yep !! 

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wagon64sd


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ok i`ll get a picture valve side up..

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ak 67sd


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Just out of interest has anyone ever flow benched stock 194's to compare to stock 202s? I doubt there would be too much difference, i wonder how well gm unshrouded the combustion chamber around the 202s or did they just cut the 194 seats and thats it? a pic of a stock 202 chamber would answer that i suppose... I remember when i ported my 461s that there was alot of meat under the 194 valve and opened up the hole would be bigger than the stock 202 head...

ak

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Wpg, MB to London, ON

Numbers don't match! Especially HP and ET. 
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2drpost


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....almost forgot....

went down to the big smoke last week and picked up these heads and intake
for my L79 build.
was a pleasure to meet yet another CP member and check out his b/blk beaumont too.
thanks again bill. smile

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427carl


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ak 67sd wrote:

Just out of interest has anyone ever flow benched stock 194's to compare to stock 202s? I doubt there would be too much difference, i wonder how well gm unshrouded the combustion chamber around the 202s or did they just cut the 194 seats and thats it? a pic of a stock 202 chamber would answer that i suppose... I remember when i ported my 461s that there was alot of meat under the 194 valve and opened up the hole would be bigger than the stock 202 head...

ak


         My little Pontiac has a RD code 64 Vette motor and I installed some Ray White valve covers on it, and sent my others to  B.C.   the heads are matching 64 "461"s  biggrin



 



-- Edited by 427carl on Monday 27th of July 2009 11:03:13 PM

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