Hi all,
I want to swap some components for my 76 Custom Cruiser 455 to have the car breath a bit better and increased mpg.
It is still bone stock and I don't want to open the engine up yet (no other intake or heads) but I will remove all the EGR/AIR crap and will install headers with dual exhaust.
I did the Comp Cams Camquest check and these 3 came up:
252H
XE250H
255DEH
I want bottom end torque with good rpm/mpg for a 5000 lbs car with 2.73 gears, but I don't know the difference with Dual Energy, High Energy etc.
Also to consider if I decide to swap to an Edelbrock intake and other heads later on.
Cheers!

 

High energy is a single pattern, Dual energy is a dual pattern cam. A dual pattern cam will have different lifts and durations for intake vs exhaust.

What you really need is a single pattern on a 112 or so lobe sep. I don't believe Comp offers that but you might continue looking.

 

I will have to take a look at the Crane Cams but Lunati has 2 cams with both 112 LSA so that will either be the:
10420211 high eff
10420700 voodoo which looks very good

 

Asking for opinions on a cam is like asking which is the best type of women, blondes, brunette, red head, etc. Here's my opinion, Comp Cam H262 (I think). It's a torque rv cam. .456/.456. I have this cam in my lo-comp 455 in my 1971 Royale. It's a combination, Edelbrock intake, upgrade exhaust. I have the same gears. This made a big difference in my car. As always, JMO. Ken

 

Do the 10420211.

Jmo.

 

Lunati shows the valve lift with 1.6RR, will the engine with this mild 262/262 cam also benefit if I change from 1.5 to 1.6 rockers?
Just for comparison, what are the specs for a 76 Olds 455 stock cam?

 

Stock 455 cam is something like 200* at .050 lift
joepenoso
I wonder what the specs were for a stock 442 cam

 

Stock rocker ratio is 1.6:1.

 

I have decided to go for the following changes for now and change to a Lunati full hydraulic roller setup with following part numbers:
Edelbrock Performer Intake Manifold #2151
Hooker Competition Headers #3902
Lunati Hydraulic Roller Camshaft 262/270 #20420710
Lunati Hydraulic Roller Lifters #72330-16
Lunati Timing Chain Set #94213
Lunati Valve Springs #73195-16
Lunati Retainers #75740-16
Lunati Valve Locks #77111-16
Lunati Teflon Valve Stem Seals #78503-16
Comp Cams Magnum Roller Rockers #1442-16
Comp Cams High Energy Pushrods #7841-16
Comp Cams 5/16“ Guideplates #4842-8
Comp Cams 3/8“ Rocker Arms Studs #4542-16
Mr. Gasket #56C
Fel-Pro Gaskets #1356 and #8171

Also the following will be done:
Since the car will be mostly highway driven, oil cooler for the tranny will be installed.
Electric fan conversion from a Lincoln MK8 4500 cfm which hopefully will fit in the standard fan shroud (and lose the nagging whining sound).
AIR pump delete with EGR, this will also remove some drag from the engine with the old visco fan.
Incredibly in the Netherlands, I found a TH400 crossmember from a 74 Impala to change from the Y-pipe to full dual exhaust with X-cross piece.
So if I get rid of the iron intake, visco fan, EGR and AIR pump and iron exhaust manifolds, it will save 100 pounds and hopefully gain 100 hp/torque and some significant MPG.
I do not want to change pistons and heads for now, I want to do that in 2 years time when the car is 40 years old and road tax exempt and then swap to LP IMPCO 425.

Any tips/hints you guys can give me when we will be working on all of the above, no issues when I install these parts on a stock 38 year old engine?