Cam Spec question

89 Cobra LX · 06-11-2001, 12:13 PM

Below are some of the specs for my cam. Can someone tell me how my motor should be behaving? I have some good lift #s, but the duration #s look a little low. Does the low duration mean my power band will be lower in the RPM range? I recently dyno'd my car and the peak HP occured at 4500RPM.

Lift
Intake .499
Exhaust .510

Duration
Intake 275
Exhuast 279

Thanks

------------------
Eric - 89 Mustang LX
302 - Cobra Intake - GT40p heads - Naturally Aspirated

Rick 91GT · 06-11-2001, 04:31 PM

The duration seems normal for a good mid range NA cam, for instannce my cam pulls from 2500-6500 I have 280/288 or 228/236 @ .050. What are the rest on the numbers on your cam so I an help you, when do the valves open and close, lobe centerline, is it advanced, etc.. Can you scan the cam card?

------------------
Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon! FIRST TIME OUT 12.16@111 WHEELS-UP

06-11-2001, 12:13 PM	#1
89 Cobra LX Don Corlione Join Date: Jun 2001 Location: Omaha NE USA Posts: 491	Cam Spec question Below are some of the specs for my cam. Can someone tell me how my motor should be behaving? I have some good lift #s, but the duration #s look a little low. Does the low duration mean my power band will be lower in the RPM range? I recently dyno'd my car and the peak HP occured at 4500RPM. Lift Intake .499 Exhaust .510 Duration Intake 275 Exhuast 279 Thanks ------------------ Eric - 89 Mustang LX 302 - Cobra Intake - GT40p heads - Naturally Aspirated

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
A stupid question I hate asking about exhaust sound	jwboner	Windsor Power	4	08-05-2003 05:55 PM
Tremec 3550 & SPEC Stage 2	JRowlette	Windsor Power	0	10-20-2002 10:40 PM
simple question	Lonzo	Classic Mustangs	3	09-10-2002 09:37 AM
What is the spec for main bearing clearance	Stang_ROTY	Windsor Power	4	04-24-2002 11:32 AM
Newby here, I have a question on Odometers	mustangmama	Blue Oval Lounge	3	03-03-2001 06:43 AM

06-11-2001, 04:31 PM	#2
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	The duration seems normal for a good mid range NA cam, for instannce my cam pulls from 2500-6500 I have 280/288 or 228/236 @ .050. What are the rest on the numbers on your cam so I an help you, when do the valves open and close, lobe centerline, is it advanced, etc.. Can you scan the cam card? ------------------ Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon! FIRST TIME OUT 12.16@111 WHEELS-UP