cam help

d21hardbody · 04-09-2009, 09:45 PM

whats the biggest cam i can run on a speed density car?

89five0Gt · 04-10-2009, 06:47 AM

I would leave the stock cam in it until you convert it to mass-air. That's JMO
The speed density computer can not adjust for the air difference needed for an aftermarket cam

EHardy1971 · 04-10-2009, 07:40 AM

Quote:

Originally Posted by 89five0Gt

I would leave the stock cam in it until you convert it to mass-air. That's JMO
The speed density computer can not adjust for the air difference needed for an aftermarket cam

+1. You CAN throw some 1.7 roller rockers on it though. This will bump up your lift & duration on the stock cam. Somebody used to make a SD friendly cam a few years ago,but I forgot who. It's pretty easy to convert yours over to mass air.

coupe · 04-10-2009, 08:52 AM

If it's mild enough, you can compensate with some fuel-pressure... but I wouldn't recommend anything over about 212º duration.

86nu · 04-19-2009, 05:20 PM

Quote:

Originally Posted by EHardy1971

+1. You CAN throw some 1.7 roller rockers on it though. This will bump up your lift & duration on the stock cam. Somebody used to make a SD friendly cam a few years ago,but I forgot who. It's pretty easy to convert yours over to mass air.

rockers only affect lift fyi

EHardy1971 · 04-19-2009, 05:40 PM

Quote:

Originally Posted by 86nu

rockers only affect lift fyi

Negative,they do affect the duration,although it's a small amount compared to the affected lift.

qkjuicedpony · 04-19-2009, 05:41 PM

B303 will work on a SD car.

I ran one for near 2 years with no issues at all

86nu · 04-19-2009, 06:22 PM

Quote:

Originally Posted by EHardy1971

Negative,they do affect the duration,although it's a small amount compared to the affected lift.

duration is the time the valve opens, the rocker just effects how far the valve opens

93cobra1928 · 04-19-2009, 06:25 PM

EHardy1971 · 04-19-2009, 06:39 PM

Quote:

Originally Posted by 86nu

duration is the time the valve opens, the rocker just effects how far the valve opens

This is true,however the increased ratio on 1.7's also causes the valves to open earlier,and close later. Ed Curtis explained it on the corral. I'll see if I can find the thread.

04-09-2009, 09:45 PM	#1
d21hardbody Junior Member Join Date: Mar 2009 Posts: 6	cam help whats the biggest cam i can run on a speed density car?

04-10-2009, 06:47 AM	#2
89five0Gt Senior Member Join Date: Dec 2006 Location: behind Skillet Posts: 1,356	I would leave the stock cam in it until you convert it to mass-air. That's JMO The speed density computer can not adjust for the air difference needed for an aftermarket cam Last edited by 89five0Gt; 04-10-2009 at 06:50 AM.

04-10-2009, 08:52 AM	#4
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	If it's mild enough, you can compensate with some fuel-pressure... but I wouldn't recommend anything over about 212º duration. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

04-19-2009, 05:41 PM	#7
qkjuicedpony Dayuuuuuuum!!!!! Join Date: Dec 2004 Location: Dallas GA Posts: 2,933	B303 will work on a SD car. I ran one for near 2 years with no issues at all __________________ 86 Mustang Gt......Mods piling up in my garage. 07 F350 dooly.....Tows my fifth wheel

04-19-2009, 06:25 PM	#9
93cobra1928 Dazed and Confused Join Date: Mar 2009 Location: Northport, Al Posts: 778	__________________ Proud owner of 93 Cobra #1928 306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards