B303 + Speed Density = ?? November 18, 2007, 12:31:43 PM Any personal experiences????I really wanna know how the idle will be, it's not a large cam so I'm thinking I can get away with it. Quote Selected
B303 + Speed Density = ?? Reply #1 – November 18, 2007, 06:03:50 PM If you want to put a cam in speed density auto car i think the e303 is the way to go,b303 is more of a stick cam. Quote Selected
B303 + Speed Density = ?? Reply #2 – November 18, 2007, 06:36:04 PM Neither one will idle well. Ford alphabet cams have poor vacuum characteristics at idle and low RPM's. Speed Density likes lots of vacuum. There are plenty of "bigger" cams that will actually work much better. Quote Selected
B303 + Speed Density = ?? Reply #3 – November 18, 2007, 08:23:53 PM Quote from: V8Demon;188418 There are plenty of "bigger" cams that will actually work much better.Got examples?TED Quote Selected
B303 + Speed Density = ?? Reply #4 – November 19, 2007, 02:54:14 AM T-jet posted a chart from 50tech.com http://www.foxtbirdcougarforums.com/showthread.php?t=16085&highlight=speed+density+cam Quote Selected
B303 + Speed Density = ?? Reply #5 – November 19, 2007, 08:27:17 PM Quote from: 88XR7;188361Any personal experiences????I really wanna know how the idle will be, it's not a large cam so I'm thinking I can get away with it.Chances are ZERO & NONE... Speed Densety will not like ANY cam with more than approx 212-215* @ .050 and less than 114* lobe center... Quote Selected
B303 + Speed Density = ?? Reply #6 – November 20, 2007, 10:46:42 AM Think of SPEED DENSITY as the evil green peace overlord of hell. who's number one goal is non-performance cars, no horsepower, and no speed. you wanna live forever , drive speed density, and all the old people will fly passed you. sorry about the rant.....i'm either old school, or mass air. the speed density e.c.m. has very little room to play with your cars engine setup. sorry Quote Selected
B303 + Speed Density = ?? Reply #7 – November 20, 2007, 12:03:17 PM Quote from: screaming306;188735Think of SPEED DENSITY as the evil green peace overlord of hell. who's number one goal is non-performance cars, no horsepower, and no speed. you wanna live forever , drive speed density, and all the old people will fly passed you. sorry about the rant.....i'm either old school, or mass air. the speed density e.c.m. has very little room to play with your cars engine setup. sorryum, thats why the '87-'88 stangs where faster out of the factory then the '89-'93's? I had my stock speed density '88 stang running in the 12's @104mph... Thats not fast? Quote Selected
B303 + Speed Density = ?? Reply #8 – November 20, 2007, 12:27:56 PM I helped a friend of mine gasket port (matched the port openings to the gaskets size on the intake and exhuast) the heads on his 87 f-150. (thought it would help) truck ran great before. afterwards it ran like shiznit, wouldn't idle, fell flat on its face. no power. after lots of cusing and a few months he ponied up and bought the $700.00 kit from jegs to convert to mass air. no problems since. so after watching his bad luck unfold, i stay away from the speed density. Quote Selected
B303 + Speed Density = ?? Reply #9 – November 20, 2007, 01:41:38 PM As long as you have more than 16/17" vac the speed densety will be happy(idle)... This isn't to say it could lean out with large enough airflow(heads, intake, exhaust, etc)...The SD is not a bad system, it just has to be programmed for the particular engine it is operating... IF you had large cam, heads, inj etc and it was programmed for these and to idle on 12" of vac it would be great... Quote Selected
B303 + Speed Density = ?? Reply #10 – November 20, 2007, 03:40:15 PM Quote from: screaming306;188735Think of SPEED DENSITY as the evil green peace overlord of hell. who's number one goal is non-performance cars, no horsepower, and no speed. you wanna live forever , drive speed density, and all the old people will fly passed you. sorry about the rant.....i'm either old school, or mass air. the speed density e.c.m. has very little room to play with your cars engine setup. sorryQuote from: screaming306;188753I helped a friend of mine gasket port (matched the port openings to the gaskets size on the intake and exhuast) the heads on his 87 f-150. (thought it would help) truck ran great before. afterwards it ran like shiznit, wouldn't idle, fell flat on its face. no power. after lots of cusing and a few months he ponied up and bought the $700.00 kit from jegs to convert to mass air. no problems since. so after watching his bad luck unfold, i stay away from the speed density.Your friend fvcked up then. My GT40 headed .533 lift cammed SD Bird runs fine. Probably has just as much balls as your carbed set up. Quote Selected
B303 + Speed Density = ?? Reply #11 – November 20, 2007, 03:58:49 PM Quote from: thunderjet302;188775Your friend fvcked up then. My GT40 headed .533 lift cammed SD Bird runs fine. Probably has just as much balls as your carbed set up.your cam works fine because of the short duration(more vacuum). if you were to bump up to a cam with more duration(less vacuum), it would run like shiznit without Mass Air.lift isnt the only thing different on aftermarket cams. Quote Selected
B303 + Speed Density = ?? Reply #12 – November 20, 2007, 04:18:55 PM Quote from: 32VFoxBird;188778your cam works fine because of the short duration(more vacuum). if you were to bump up to a cam with more duration(less vacuum), it would run like shiznit without Mass Air.lift isnt the only thing different on aftermarket cams.I know. But if his friend just ported the heads and caused the SD computer to go crazy..............he had to do something else besides port match the heads. GT40Ps flow more than simple port matched E7s and I have no problems. He had to add too big of a cam or something...... Quote Selected
B303 + Speed Density = ?? Reply #13 – November 20, 2007, 04:54:20 PM I'd have to agree. I had an aftermarket cam with speed density. The previous owner of the car installed the cam. The heads and intake had work done to them too.Something else was wrong IMHO. Like Tom said once you start to go nuts you have to calibrate the SD for the combo. Most aftermarket computer setups are SD.The '87 F-150 cam has the same lift as the SO cam. I've never been able to find duration #'s to compare the two, but I'll guess it has a little more duration than the SO cam due to the extra weight, E7 heads from the factory and 19 pound injectors as opposed to 14's. I can't really see the duration being too much though, at least not enough to interfere with a simple port match job to the point where it makes it run all messed up. The cam specs on Thunderjet's cam are here: http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-308-8***With all this being said, I've had an idea floating in my head for a while that I'd like to try, but just haven't gotten around to it. It involves my current motor setup in the Cougar, a vacuum sytem and speed density. Perhaps in the springtime..... Quote Selected
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