Would anyone know of a roller cam with specs very close to those of the LT1 solid lifter cam? Thanks for any input.

Dave64

 

No need to, we already have the LT1 cam, and besides why put all that breakable junk in a good engine.

 

I'm on the other side of the fence from Iron Cross. 35+ years ago they didn't have the metal technology they do today. Springs were the limiting factor in cam designs.

So all those factory hot cams used big duration and very little lift in an attemp to make power. Today much more power can be made with steep ramps and keeping the valve open longer at higher lifts with not all the bad effects of big duration numbers.

You can kick an LT1's original 375 hp car with a modern H-flat cam. That old junk had it's place in history and that's where it belongs. Lt1er who owns a real 71 LT1 uses a modern mech flat cam and new parts. He knows how the original ran and how his over 400 hp runs now.

 

I disagree! We had all of the stuff you refered to as I was a user of those products. .700 lift cams, titanium valves, aluminum blocks and heads, Nitro, plus the springs to handle the load. But these were not stock items as I thought Dave wanted. And there has never been a hydraulic cam that could ever surpass a solid lifter cam for max performance if you wanted to be the first to light up the win light and collect the $$$. I have never raced for laughs

 

To clarify why I asked about the LT1 roller equivalent: I'm building a 327similar to my original 365hp 327, I'm using Edelbrock RPM heads and MassFlo EFI. I'm going with a solid lifter cam and am wondering if anyone has used a solid roller with similar specs and what they thought of the roller vs. the flat tappet cam.

Thanks,
Dave64

 

I don't think that a roller = was ever made. Crane street solid roller start at really mild. I think that Crane does sell a blue print line of cams or if you could get a cam card with the .050 valve event numbers and lift of the Lt1 cam you could figure out what they were really doing.

I had a street rod 4.060 X 3.25 motor with this cam and 1.6 roller rockers and it really ran nice. That's something like 336 ci.

Iron Cross - One of the local Vette guys installed the 30/30 duntov cam in his 69 and it sounded bad with the big side pipes, but the performance just wasn't there in comparison to Lt1ers ported 186 with flat tops and this same cam I ran. Were all Vette guys here - right!

Camshaft Specification Card BACK TO LIST
Part Number: 113841 Grind Number: F-278-2 (REPLACES CC-278-2)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 FAIR IDLE, MODERATE PERFORMANCE USAGE, GOOD MID-RANGE HP, BRACKET RACING, 3400-3800 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
Engine Size Configuration
262-400 C.I. V
Valve Setting: Intake .022 Exhaust .022 HOT
Lift: Intake @Cam 320 @Valve 480 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3334 @Valve 500
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @.018
Lift: Opens Closes ADV Duration
Intake 29.0 BTDC 69.0 ABDC 278 °
Exhaust 82.0 BBDC 26.0 ATDC 288 °
Spring Requirements: Triple Dual Outer Inner
Part Number 96877
Loads Closed 126 LBS @ 1.850 or 1 27/32
Open 304 LBS @ 1.400

Recommended RPM range with matching components
Minimum RPM 3000
Maximum RPM 6800
Valve Float 7400
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 10.0 BTDC 48.0 ABDC 109 238 °
Exhaust 63.0 BBDC 5.0 ATDC 119 248 °