Re: The rebuild of the Pantera coloured 509
 

Does anyone know how you tell if the carbs are boost referenced?! Is the only way to reference to have the hose from the carbs to the intake, or is there any other way?

Re: The rebuild of the Pantera coloured 509
 

The head gaskets in the engine was Fel-Pro Wire Loc's. Is it possible to use the Cometic/MLS gaskets instead or am I stuck with the Wire Loc's?!

Loc Wire head gaskets require machining a special receiver groove into the cylinder heads by a skilled machinist.

Re: The rebuild of the Pantera coloured 509
 

Does your heads have a reciever groove in them now ?
How about the block is , Does it have a wire orings around the cylnders ? By the pictures it is hard to tell.

Re: The rebuild of the Pantera coloured 509
 

The heads have a receiver cutout about .05 wide in them. Nothing in the block.

Re: The rebuild of the Pantera coloured 509
 

I could be wrong but inorder to run the cometic I believe that you would have to mill the reciever grooves out of the head.
Unless something changes I am going to mill the grooves out of mine , keep the wire orings in my block & run a copper gasket with graphite inserts around the water jackets. ( per. Dean Gellners advise.)
If you only have grooves in the heads & nothing in the block
I would probably mill the grooves out & run the cometic. But that is just my opinion. I am shure others will have theirs.

Re: The rebuild of the Pantera coloured 509
 

i ran these gaskets on a blower motor and every time i ran the motor hard it would milk up the oil. cut the groove off your head put cometic gaskets on it or the felpro that is like the cometic and the water will stop also we run a pcv valve this helps with the water up in the top of the motor (merc runs a pcv on about all of there motors) as for the carbs being boost referenced they will have vacum lines that go down to the intake below the blower and the power valve vent hole in the base plate of the carb will be pluged

Re: The rebuild of the Pantera coloured 509
 

Thanks Mikes, I will look into the groove to see if there is any other way since I really don't want to increase the static compression.

I got the cam out and the 80%-leakdown piston last night. The cam looks good but we will measure it next week to see if it's ok and if we will go with a roller instead.

Since the leak in that cylinder seemed to be from the piston,I had my hopes that the rings would be torn. I only had time to get the top ring off and the play was about .04. I will check the other ring tonight but I will probably have to look elsewhere for the leak. :(

Re: The rebuild of the Pantera coloured 509
 

Do you guys have some more info on this UltraDyne cam?!

The numbers as is say on the cam:

J3854
272 282F14
15 16
200278

Re: The rebuild of the Pantera coloured 509
 

Got the info from rmbuilder:

Mechanical flat tappet:
J3854 serial #
272º/282º Seat duration
238º/248º @ .050"
146º/155º @ .200"
.550"/570" lift valve
.3233"/.3353" lift lobe
114 LSA
15 16 (lobe master #)

Re: The rebuild of the Pantera coloured 509
 

Would you guys want to change something in this combo?

The engine is as follows:

Block: Merlin II 509ci
Crank: Callies
Rods: Manley H-Beam
Pistons: JE blower pistons (757F)
Comp: 8-8.5 according to engine builder
Cam: UltraDyne mechanical flat tappet (J3854)
272º/282º Seat duration
238º/248º @ .050"
146º/155º @ .200"
.550"/570" lift valve
.3233"/.3353" lift lobe
114 LSA
15 16 (lobe master #)

Heads: GM 188
Head gaskets: FelPro Wire-Loc
Valves: 1.88/2.25
Rockers: Jesel Comp Series 1.7
Intake: Blower intake
Blower: BDS 8-71
Boost: About 5psi
Carbs: 2x Holley 9022 800cfm
Ignition: Mercruiser
Exhaust: Mercruiser/GIL Hi Performance

According to engine builder (MDG Performance) it dynoed at 720-740HP@5600-5700rpm on 91 octane.

Planning on switching to and adding:
Exhaust: Stainless Marine Gen III with 5" dry tails
Intercooler: Superchiller