Chevy Engine Build Part 26 - Comp Cams

Besides tying all the rocker studs together for strength, the stud girdle offers another benefit. Instead of just relying on the poly-locks to hold rocker adjustment, stud girdles clamp down on the locks for added strength.
Besides tying all the rocker studs together for strength, the stud girdle offers another b
In order to find the most power, we moved cam timing up and down in 2-degree increments. Best power came with the cam at a 106-intake centerline, which is 2 degrees advanced from Lunati's recommended position.
In order to find the most power, we moved cam timing up and down in 2-degree increments. B
Whenever moving cam timing around, you also have to readjust the ignition timing, which changes equally to your cam adjustment. In other words, if you advance the cam 2 degrees, your timing will advance 2 degrees.
Whenever moving cam timing around, you also have to readjust the ignition timing, which ch

Note that the power for T42 does not begin until 3600 rpm. We had some difficulty loading the engine that low in last month's test. But this month, DM had no trouble pulling down there so we were able to get some power figures in the lower RPM range. As we said last month, "sometimes the dyno does not act like a car". But, now we know that if this engine were in a car, it'd be able to accelerate strongly from well below 3,500 rpm.

We're always looking for new ideas. Do you have a better one for Danger Mouse? Send your test suggestions to:

Super Chevy Magazine
Attn: Danger Mouse
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Placentia, CA 92870
Or e-mail: terry.cole@primedia.com

DANGER MOUSE COMPONENTS FOR PART 26
CAM	LUNATI CAMS SOLID ROLLER, CUSTOM (PN 50105)
CARBS	HOLLEY HP650 (PN 0-80541-1)
GASKETS	FEL-PRO (head PN 1003, intake PN 1205)
HEADS	EDELBROCK VICTOR JR. (PN 77599)
IGNITION	MSD 8977 MULTI-FUNCTION DIGITAL CONTROLLER
LIFTERS	COMP CAMS ENDURE-X SOLID ROLLER (PN 888-16)
MANIFOLD	WEIAND HI RAM (PN 1984)
PISTONS	LUNATI CUSTOM FORGINGS
ROCKERS	COMP CAMS 1.6:1 PRO MAGNUM (PN 1302-16)
STUD GIRDLE	COMP CAMS (PN 4007)

	Test 42		T43		T42 vs. T43
RPM	TQ	HP	TQ	HP	TQ	HP
2600	n/d	n/d	353	175	n/d	n/d
2800	n/d	n/d	390	208	n/d	n/d
3000	n/d	n/d	418	239	n/d	n/d
3200	n/d	n/d	424	258	n/d	n/d
3400	n/d	n/d	423	274	n/d	n/d
3600	428	293	428	293	0	0
3800	439	318	441	319	2	+1
4000	459	350	456	348	-3	-2
4200	468	374	463	370	-5	-4
4400	463	388	462	387	-1	-1
4600	465	407	465	407	0	0
4800	470	430	479	437	+9	+7
5000	475	452	497	473	+22	+21
5200	479	474	509	504	+30	+30
5400	481	495	514	529	+33	+34
5600	477	509	511	545	+34	+36
5800	469	518	503	555	+34	+37
6000	460	526	494	565	+34	+39
6200	450	531	485	573	+35	+42
6400	436	531	475	579	+39	+48
6600	421	529	462	580	+41	+51
6800	407	527	445	576	+38	+49
7000	395	526	431	574	+36	+48
Max	481	531	514	580	+41	+51
Avg	452	454	473	479	+21	+24
n/d=No Data

SOURCES
Autotronic Controls Corp. (MSD Ignition) 1490 Henry Brennan Dr. El Paso TX 79936	Lunati Cams Olive Branch MS 6-62/-892-1500 lunatipower.com
Bill Mitchell Hardcore Racing Products 51 Trade Zone Ct Source for World Products Ronkonkoma NY 11779	Royal Purple
Blower Drive Service(BDS) 12140 E. Washington Blvd. Whittier CA 90606	Speed-O-Motive 131 W. Lang Ave. West Covina CA 91790 6-26/-869-0270 speedomotive.com
COMP Cams	Total Seal Dept. SC 11202 N. 24th Ave. Suite 101 Phoenix AZ 85029
Edelbrock Dept. 5.0 2700 California St. Torrance CA 90503 310-781-2222 www.edelbrock.com	VP Racing Fuels 210-635-7744 www.vpracingfuels.com
Fel-Pro 26555 Northwestern Hwy. Southfield MI 48033	Vrbancic Brothers Racing 1463 E. Philadelphia Ontario CA 91761 909-930-9980
Holley Performance Products 1801 Russellville Rd. Bowling Green, KY 42101 KY 42101 270-782-2900 www.holley.com	Weiand N/A 800-HOL-LEY1 www.holley.com.