Split: Cam Discussion (From:dyno day today, new numbers bwahaha)

[383BackInBlack]

Originally posted by BADASS355CIZ28
yeah auburn pd is pretty tough......i know a few but not alot....i used to work on their cruisers when i worked for fuller automotive..... i need to get my maro to the dyno one day id like to find out what it puts to the rear wheels....desktop dyno 2000 says with my engine combo im puttin out 488 hp at 6000 and 465 tq at 5000 but i know thats not correct...only a real dyno will tell :thumbsup:

ya dyno 2000 cant even understand my cam specs, it wont let me enter the ivo ivc evo evc events manually......it just changes them to what it wants.....

and it said my motor had like 650hp........which at this point is about 100hp high lol

[BADASS383CIZ28]

desktop makes a cam disk was readin an old chevy or car craft mag with over 3500 cams

[MadMalibu71]

goto www.prestage.com and into the download section.. they have a file you can get with heads and cam specs

[383BackInBlack]

Originally posted by BADASS355CIZ28
desktop makes a cam disk was readin an old chevy or car craft mag with over 3500 cams

ya it still gets the valve events wrong though, and when i try and change them, it changes the other specs too lol

it fuckin hates my cam

[BADASS383CIZ28]

yeah all i run is high octane fuel in mine..with 11:1 dont need any detonation...............kev....i picked up a solid roller cam for 50 bux a few months ago something like 549 intake and 538 exhaust lift or something.some custom cam from cam motion cams i couldnt pass a 50 dolla cam up

[383BackInBlack]

Originally posted by BADASS355CIZ28
yeah all i run is high octane fuel in mine..with 11:1 dont need any detonation...............kev....i picked up a solid roller cam for 50 bux a few months ago something like 549 intake and 538 exhaust lift or something.some custom cam from cam motion cams i couldnt pass a 50 dolla cam up

lol......mines 11.5 : 1 compression

sounds like a nice cam, its alot smaller than mine, but depending on the duration it should make some sick torque

[BADASS383CIZ28]

its a 260 intake dur and 258 exhst dur @.050 and the lift is .546 int 539 exh

[383BackInBlack]

Originally posted by BADASS355CIZ28
its a 260 intake dur and 258 exhst dur @.050 and the lift is .546 int 539 exh

actually thats fockin huge........thats not gonna idle worth shit lol

it will make great power, but have no bottom end

[540Malibu]

Originally posted by 383BackInBlack
actually thats fockin huge........thats not gonna idle worth shit lol

it will make great power, but have no bottom end

yeah, cams with durationa nd lfit figures like that usually have a narrow lobe seperation, i had my 246/256 .050 .600 lift cam made with a 114 LS so ti would idle nice and low, and save some bottom end.

[383BackInBlack]

Originally posted by 540Malibu
yeah, cams with durationa nd lfit figures like that usually have a narrow lobe seperation, i had my 246/256 .050 .600 lift cam made with a 114 LS so ti would idle nice and low, and save some bottom end.

not a bad idea spencer :thumbsup:

[Slowhawk]

I've found that 114 duration Cams give up midrange compared to 112 duration Cams.Can be a good amount too.

[BADASS383CIZ28]

quote:
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Originally posted by BADASS355CIZ28
its a 260 intake dur and 258 exhst dur @.050 and the lift is .546 int 539 exh
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actually thats fockin huge........thats not gonna idle worth shit lol

it will make great power, but have no bottom end

the current solid flat tappet cam i run has a 238/248 dur at .050 and .500 lift and i idle round 850 rpms hey keep us posted who wins fatblock jesse or kev 383 should be a nice race bbc gets :owned: by the sbc :thumbsup: mongo

[383BackInBlack]

Originally posted by BADASS355CIZ28
quote:
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Originally posted by BADASS355CIZ28
its a 260 intake dur and 258 exhst dur @.050 and the lift is .546 int 539 exh
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actually thats fockin huge........thats not gonna idle worth shit lol

it will make great power, but have no bottom end

the current solid flat tappet cam i run has a 238/248 dur at .050 and .500 lift and i idle round 850 rpms hey keep us posted who wins fatblock jesse or kev 383 should be a nice race bbc gets :owned: by the sbc :thumbsup: mongo

well ya man, but in terms of cam math......260/258 is frican enormous compared to 238/248

my car idles at 600rpm, and im 248/248........anything over 250 is REAL big

[BADASS383CIZ28]

sup kev......so ya dont think that solid roller cam i got is worth puttin in my next sbc???????????

[383BackInBlack]

Originally posted by BADASS355CIZ28
sup kev......so ya dont think that solid roller cam i got is worth puttin in my next sbc???????????

no it will fuckin rock........ just dont try and drive it in traffic.....especially if your car is an automatic without a 5000rpm stall converter lol:thumbsup:

[BADASS383CIZ28]

hey kev........i dont drive an automatic trans...id rather shift them 5 gears hahaha i run a 5 speed with 3 73s in my maro that i have now but thinkin of the t-56 trans next.......another question....if i use that cam with afr 200 heads, 12 to 13:1 comp in a 383 could i achieve 600 hp at the flywheel?

[383BackInBlack]

Originally posted by BADASS355CIZ28
hey kev........i dont drive an automatic trans...id rather shift them 5 gears hahaha i run a 5 speed with 3 73s in my maro that i have now but thinkin of the t-56 trans next.......another question....if i use that cam with afr 200 heads, 12 to 13:1 comp in a 383 could i achieve 600 hp at the flywheel?

should be......im around 550 at the flywheel now, and my cam is smaller.

i take it this is not gonna be a pump gas motor???? thats a lot of compression

[BADASS383CIZ28]

im not sure yet im tryin to stay with pump gas with octane boost so i might have to stick around 11.5:1 or 12:1 .....i run 11:1 and i need octane boost pretty sad huh lol

[BADASS383CIZ28]

im not sure what i want yet.id like to stay on pump gas if i could so id proll have to run 11.5:1 or 12:1 im at 11:1 now and need octane boost sad huh lol

[383BackInBlack]

Originally posted by BADASS355CIZ28
im not sure yet im tryin to stay with pump gas with octane boost so i might have to stick around 11.5:1 or 12:1 .....i run 11:1 and i need octane boost pretty sad huh lol

octane boost is kinda shady, cause it doesnt really do much....

when it says "raises octane up to 7 points" it means going from 93 to 93.7 not 100

if it works for you sweet

im at 11.5:1 right now and mine runs find on 93 with the timing at 12 degrees initial and 26 mechanical advance all in by 3000rpm

alot of what octane you can get away with for given compression can be based on dynamic compression too, not static.....so the more overlap your cam has, generally the more you can get away with

[BADASS383CIZ28]

i got my initial iming set at 12 also seems the best when its set there as far as the octane boost.havent run it for a few months since i re -did the ignition timing.. other than that i have no complaints

[malibu81]

That cam seems like really low lift for that kind of duration. Its also weird that the intake has more lift and duration then the exhaust. I think is usually the other way around. That cam would idle fine mine is 263 and 259 with a 108 seperation and I idle around 750.

I don't know if I would use that cam, it seems very specific for an application. The cam is so important in making you combo work that you should get one make for you application.

[BADASS383CIZ28]

malibu...cam motion cams had it made for a sbc with buick heads i think the cam im talkin bout is the solid roller with 260/258 dur

[383BackInBlack]

Originally posted by malibu81
That cam seems like really low lift for that kind of duration. Its also weird that the intake has more lift and duration then the exhaust. I think is usually the other way around. That cam would idle fine mine is 263 and 259 with a 108 seperation and I idle around 750.

I don't know if I would use that cam, it seems very specific for an application. The cam is so important in making you combo work that you should get one make for you application.

i dunno......solid cams tend to have specs like that......the duration and lift i mean.....but the difference is the ramp......the rate at which they open and close valves is RIDICULOUSLY fast compared to hydraulic cams......so they can get away with less lift

[malibu81]

Most solid rollers I have heard about have huge lift. Make sure its a roller, maybe its a flat tappet. I don't think that cam would use the full potenital of the heads due to the small lift. If that cam was speced for 1.5 rockers you could always go up to 1.6 or higher to get the lift you want.

I was just surprized because the cam for my 383 came from cam motion and the lift is ALOT bigger then that with about the same duration. Call up cam motion again and tell them your ride and they will spec you a cam, then you can compare that to the one you bought.

Also remeber with a cam that has that much overlap you will want to run alot of static compression. This is due to the fact the the overlap will bleed off alot of pressure at low rpms. But like 383 said your going to have to launch it at 5000 and it won't want to run under 3000.

[383BackInBlack]

Originally posted by malibu81
Most solid rollers I have heard about have huge lift. Make sure its a roller, maybe its a flat tappet. I don't think that cam would use the full potenital of the heads due to the small lift. If that cam was speced for 1.5 rockers you could always go up to 1.6 or higher to get the lift you want.

I was just surprized because the cam for my 383 came from cam motion and the lift is ALOT bigger then that with about the same duration. Call up cam motion again and tell them your ride and they will spec you a cam, then you can compare that to the one you bought.

Also remeber with a cam that has that much overlap you will want to run alot of static compression. This is due to the fact the the overlap will bleed off alot of pressure at low rpms. But like 383 said your going to have to launch it at 5000 and it won't want to run under 3000.

:thumbsup:

[BADASS383CIZ28]

i was reading the cam sheet on the solid roller and i noticed a max lift number of 6 something cant remember off the top of my head....and the max lift was with a 1.8 ratio rocker arm i believe...ill read the cam sheet again and let ya know mongo