moserman

for people who are running vaccuum gauges, what is yours measuring? i have a 383 stroker and am showing 17 at idle(not sure what the measuring unit is), i need to know what others are running!!! thanks!!

playa7970

wow wish i was getting that kind of vacuum at idle im only showing 7-8hg in my stroker what type of cam is in there

JustNO

My vavuum is around 65kpa. I don't know what is it equal in hg.

moserman

its a 224/230 cam out of the 350 i had, i threw it in the stroker motor cuz i culdnt afford another cam but its way too small for what i got now

playa7970

whats the lsa

JustNO

yes its very small for a 383. But I think you got a great drivability.

moserman

not sure of the LSA, wasnt specified when i bought it, btu the lift is 536/544 with 1.6 rockers..... and driveability is good but im using this hog as a weekend warrior now.... i was lookin at a 240/240 .598/.598 cam, seems to sound pretty healthy but i need to match up what kinda power its gonna give me with the setup im runnin

Injuneer

Vacuum is expressed in inches of mercury ("Hg) or in kiloPascals (kPa). A stock cam in a 350 LT1 will pull 20-21"Hg. Your's sounds normal for that cam in a 383.

A note to JustNO.... you don't have 65kPa of vacuum. You have 65kPa of manifold absolute pressure (MAP). To calculate the vacuum, you subtract MAP from barometric pressure (BAR). With a standard barometer, you have 103kPa - 65kPa = 38kPa = 11.0"Hg.

JustNO

My cam is 240/246dur. and be ready to surging. Its a great cam tough

JustNO

Thats right, thats because higher MAP is equal to lower Vacuum.
11.0"Hg is not bad at all then.

1racerdude

Ya want a cam with at least 6* spread between I&E duration on a SBC unless your heads dictate something different. Ya would have to have heads with a 80+% I-E ratio to use an even duration cam N/A.

moserman

what kinda power are you putting down?? and whats the exact specs of the cam? cuz i need to decide in the next week and im close, but need finalization!

JustNO

423rwhp with cats and fully closed plate Borla exhaust. I also have knock retard issue.
240/246dur. around 575lift 112.7lsa
BTW I got the power from my Heads. The important part is Cylinder Heads.

Go with Lloyd Elliot, do not chose the cam randomly. Make a search about Llyod, you will find enough info to chose him.

moserman

i have ported heads and a ported intake ready to put on, so im deciding on the cam right now, im lookin for one crazy *** lope at idle so ill see what he can do for me.

JustNO

Okay if you already have your heads and intake, then make contact with Bret (SstrokerAce). He is a Camshaft Expert. I mean he has magical power on Cams Send a PM to him.
I will go with him for my next upgrade.