Is it good?

[Camaro_Dave]

i have a cam motion solid roller. it going in a 418 sbc 18* deal( been changine ci a lot ha ha) i'm wanting to run a lot of spray but also be decent on motor.
quick run down of setup
418 ci 3.875 stroke
gm 18* heads
edelbrock victor jr(2967)
1050 carb
14:1
heavy car. want to get it to around 3300 but its probably 3500(never had on scale) big tire car with ladder bars.
i DO NOT have the cam card. grind number is
R2793 2891-16
.050 duration is 281in 292ex
lobe lift is .471in .432ex
(got that off the site)
was told its a 113 lsa

i'm wantng to run a fogger and spray the piss out of it. i spent big bucks on billet crank and rods so i don't want to run all motor ha hah a

is this decent or should i toss it and have one custom made? exhaust lift seems pretty small to me.

thanks a lot

[Jay Allen]

418 ci 3.875 stroke
gm 18* heads
edelbrock victor jr(2967)
1050 carb
14:1
heavy car. want to get it to around 3300 but its probably 3500(never had on scale) big tire car with ladder bars.
i DO NOT have the cam card. grind number is
R2793 2891-16
.050 duration is 281in 292ex
lobe lift is .471in .432ex
(got that off the site)
was told its a 113 lsa
I have the Cam Motion master list here.

The R2793 is 281 at .050 based on a small base circle camshaft with a .842 lifter and a .750 wheel. If you do not have a small base circle, you have a STD base circle, or you have roller bearings, then that number is going to grow, significantly. It does have .471" of lobe lift and the duration at .200 is 199. Again, those duration numbers are based off of the small stuff can ONLY get bigger.

The R2891 is 291.5 at .050 and only 201 at .200 again based off the small basecircle. That .200 number is not very good. The 432" of lobe lift is puzzling. I ran those lobes through my programs and that exhaust lobe has FAR LESS area than the intake does. So what does that mean? The engine will think the exhaust is smaller because it has far less area. Yes it has way more duration, but remember a cam is 2 dimmensional. It has duration, but it too has lift.

Would you use a 250/240 at .050 550/540 lift cam? Do not let the numbers decieve you. The exhaust is much smaller. Did I say that already? LOL!

Now where you are off is -16 portion of the grind number. Cam Motion's numbering system says the last 2 numbers are the LSA. That means this cam has a LSA of 116*. Thus the IC is more than likely what was conveyed to you as being 113. The cam is advanced 3 degrees.

You'll need NOS just to do a burn-out. Not because I am a custom cam guy, but you asked the question and thus I'll answer. That cam is not worth much. I'd throw it away.

Good Luck!

[Camaro_Dave]

damn. i guess its good i asked. where should i go to get one that will work for me? and how much is a custom ground cam going to cost? should i just try this one and see what happens?

[Jay Allen]

I wouldn't run that thing. probably won't fit P-V wise anyways unless you have gigantic ditches for valve reliefs! LOL

And whom to call.......I have a good guess! LOL

[Camaro_Dave]

ok another question...what would the cam be good for? besides a paper weight. like a forced induction engine or something? i don't know. my buddy is building a 400 sbc with 18* heads and a blow through procharger. he's just barely begining so he hasn't got a cam yet. if it would work for something like that i'll just give it to him.

you don't think it will fit? i mean tis kinda big but not like .850 big. guy has same heads (smaller cc i think then mine) and he has over .8xx lift no problems. but i guess every engine is different.

thanks

[Jay Allen]

P-V has is not really dictated by lift. Its the events that make it happen.

The camshaft would be in an application where the head volume is very limited on the intake side., Even though I almost never pay attention to this (because it doesn't matter) the intake to exhaust ratio should be 85-90%. Cams such as this are used to restrict engine RPM. There are many cams from the factory that have lots less exhaust duration. They are called negative split cams. Restricted applications can use these as well. Yes your duration is larger, but a cam is 2 dimmensional. Factor the lift in, and the exhaust is a lot smaller than the exhaust.

Its the exhaust that is killing it. The duration at .200" is wacky. You could run lots more rocker on the exhaust to try and help it, but it is a band-aid.

Good Luck.

[Camaro_Dave]

so "saying" the exhaust lift "was" about the same as the intake. would it be ok? i know the rocker would be a band aid but it would work right?

i'm just not in the mood to have a cam made. especially wait time. i've waited SO LONG for this dang engine to go together. but i guess if i've waited this long i can wait a little more and do it right.

i'm not really ever home from 9am to 7pm especailly if its 7pm your time cause i live in utah so i'm most likely 2 hours behind you. or else i'd call you! i'll try to find time.

thanks for your help

[Jay Allen]

PM me a number and I'll try to make it work.

[LTLHOMER]

A cam can be the difference between a boat anchor and a billy badass motor...spend the bucks and have Jay set you up with something. His prices are on par with other 'off-the-shelf' as I call them cam guys and you are getting a custom piece designed by a guy that knows his stuff...do it once and do it right.

Good luck!

[Camaro_Dave]

yeah the more i think about it i might as well. i mean dropping like 15-20 grand on an engine then skimping on cam doesn't seem smart. i know that might not be a lot to most of you but to a 20 year old it is ha ha ha.

so jay i'll do what i can to get ahold of you. i probably won't have enough info for you though. weight is probably a big factor and i have no idea what it weighs. gearing also and it might change depending on how it runs ya know....so i'll do what i can to call ya

thanks guys

[LTLHOMER]

yeah the more i think about it i might as well. i mean dropping like 15-20 grand on an engine then skimping on cam doesn't seem smart. i know that might not be a lot to most of you but to a 20 year old it is ha ha ha.

so jay i'll do what i can to get ahold of you. i probably won't have enough info for you though. weight is probably a big factor and i have no idea what it weighs. gearing also and it might change depending on how it runs ya know....so i'll do what i can to call ya

thanks guys

I feel your pain I'm 21 and going to school full time (senior mech. engineering student) as well as working full time and I also have dropped a lot of those green things on some bucket of bolts in my garage...just gotta know where and when to save money and where and when not to...cam's not a place to skimp.

Keep us updated your project sounds pretty sweet!

[Camaro_Dave]

i couldn't imagine going to school and working ful time and trying to build a car like this!!
i'll try to post some pics but they might be really big. i don't know how to make them smaller ha ha

http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=1062.0;id=615;imag e

[Camaro_Dave]

good pic of outside
http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=173.0;id=632;image

kinda shows the interior. has stock dash with auto meter guages where the radio was.
http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=173.0;id=630;image

this is a huge pic sorry but its my new b&j tranny but doesn't have the blanket or bellhousing or clitch on it. its a 3 speed auto :)
http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=1062.0;id=617;imag e

i'll try to find some more pics...

[Camaro_Dave]

i don't have any shots of the engine yet. just barely learned how to put pics up.

don't mind the quarter...friend took the pics
http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=1035.0;id=596;imag e

http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=1035.0;id=597;imag e

this is the intake and carb. crappy picture
http://www.utahcountyracing.com/forum/index.php?action=dlattach;topic=1062.0;id=643;imag e

[LTLHOMER]

You gotta log in to see those pics...send them to my email at LTLHOMER@aol.com and I'll upload them and post them for you.

[Camaro_Dave]

i don't know how to email them....ha ha i'm a retard when it comes to computers. i click the image then click the button that says send to email and it says like not implemented or something.....i'll see what i can do though

[Camaro_Dave]

i can't figure it out... sorry. maybe you could join and log on and send them to your email that way or something....i dunno

[Camaro_Dave]

see if this worked

[Camaro_Dave]

nevermind...i'm stupid with computers. if anyone wants to see them i guess you'll have to log on.

actually.....go to this link and look at both pages it has a few pics on it and i don't think you have to log in
http://www.stylz2envy.com/forum/index.php?topic=246.15

[LTLHOMER]

I'll sign up and d/l them and rehost them and post them here for ya...gimmie a few.

[LTLHOMER]

Allright that's not working cuz it won't let me save your pics lol...ummm I'm out of idea. How did you upload those pics in the first place?

[Camaro_Dave]

awesome! thanks. sorry though ha ha

[Camaro_Dave]

oh dang.

on that forum it has a button you push to browse pics off the computer. so i push that then just click the picture thats on my computer...does that make sense?

[Camaro_Dave]

maybe this will work...how come it doesn;t show the pic only the link????

http://www.stylz2envy.com/forum/index.php?action=dlattach;topic=246.0;attach=264;i mage