Bulldog cam problem

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12-16-2015 | 10:14 AM

ENGLAND DAVE

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Bulldog cam problem

Hello,can anyone help with info on the cam for my Bulldog,the cam I have is a crane cam that was bought some years ago,don't have the original anymore. the problem is when its in place with the sprocket bolted on, the lobes are so far out of line that they are close to touching the adjacent lifter, the number on the cam(although very hard to read)is I think H240329 134802 the casting number for the engine block is GM 14044807.

MANY THANKS FOR ANY HELP WITH THIS.

12-16-2015 | 11:00 AM

MILD THUNDER

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From: chicago

Do you have a cam card with that cam ? I looked it up and cant find any info on it

That should be a mark iv bowtie tall deck block. What timing are you using? Something seems off .

12-16-2015 | 11:07 AM

mike tkach

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From: yorkville,il

if it is a flat tappet cam this is pretty normal,it helps in spinning the lifter in the bore so the face of the lifter doe,s not go flat and ruin the cam.

12-16-2015 | 12:49 PM

Griff

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From: Omaha/LOTO

I thought the Bulldog's used the same cam as the carbed HP500 which would be a roller.

12-16-2015 | 01:04 PM

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From: On A Dirt Floor

In my notes;

Quote:

Originally Posted by MarineKinetics

]The Merc Bulldog is an exceptional platform for upgrades. Many of these were contracted to the military, hence the overkill on the hard parts. Below are the specs on the engine.

541.9 CID
GM MK 4 tall deck (cast# 14044807)
Block clearance to accommodate 4.375” stroke
Siamese Bore, reinforced decks with blind head bolt holes.
Deck 10.2”
2 pc rear seal
Bore 4.44”
Stroke 4.375”
(With a factory recommended bore range 4.250’- 4.560” there is plenty of room for upgrades)
SCR 8.6:1
4340 Lunati crank
Piston is Wiseco (Merc part #)
Connecting rod is Manley +.400" / 6.535"
Dart Single Plane Intake Manifold

Crane Camshaft Specification Card
Part Number: 13H000036
Grind Number: H-240/329-2-10 T1.2

The cam rates on a 110*LSA, 5* advance
Lift .329” Lobe .559” Valve
Lift .340” Lobe .578” Valve

Specs:

@.0042"
................Opens..........Closes............. C/L...........Duration
Intake.....43.0 BTDC.....77.0 ABDC......105*..........300 °
Exhaust...88.0 BBDC.....42.0 ATDC......115*..........310 °
85* overlap

@.050"
................Opens...........Closes...........C/L.........Duration
Intake.....15.0 BTDC.....45.0 ABDC.....105*.........240 °
Exhaust...60.0 BBDC.....10.0 ATDC.....115*.........250 °

Camshaft Is Ground with .0012" Lobe Taper

Bob