Author Topic: Engine idle with EB 268 cam (Read 3374 times)

toeyota · « **on:** Jun 29, 2007, 02:33:01 PM »

Just got everything put together after upgrading to the Engine builder 268 cam. Was wondering how you guys trucks idle with this cam. Ive got the timing dead on and the carb adjusted pretty dang good and it does have a pretty good lope to it. Also during normal driving there seems to be more vibration/rumble coming from the engine. I do have quite an exhast leak so that may have something to do with it.

But anyway, just looking for some opinions of the guys who run this cam. Thanks alot.

79coyotefrg · « **Reply #1 on:** Jun 29, 2007, 03:12:52 PM »

a 268 isnt gonna lope, you got a spec sheet?? whats the lift?? duration is i assume 268*

is this a 20R or 22R or 22RE

toeyota · « **Reply #2 on:** Jun 29, 2007, 04:27:50 PM »

its a 22r sorry about that. lift is .425.

79coyotefrg · « **Reply #3 on:** Jun 29, 2007, 05:18:36 PM »

i guess it could have a slight lope at a low idle, but im running a stage 2 LCengineering racing cam 460 lift with 280 duration, and it lopes anywhere under 1000 rpm but i like it

79coyotefrg · « **Reply #4 on:** Jun 29, 2007, 05:21:49 PM »

btw

to marlin

toeyota · « **Reply #5 on:** Jun 29, 2007, 06:59:54 PM »

Quote from: 79coyotefrg on Jun 29, 2007, 05:21:49 PM

btw to marlin

thanks buddy, yeah i dont mind the lope either. I did a little more tweaking to the valves, its alot better. Its got a slight lope under 1000 like you said about yours, sounds good though, especially out of the tail pipe. I think the rumble and vibration is my header, not sure what kind it is, probably a cheaper one, got it off a parts truck.

Anyway all is good now i believe, pretty pleased with that cam. Nothing drastic but it pulls pretty hard high in the rpms. Thanks for the help.

79coyotefrg · « **Reply #6 on:** Jun 29, 2007, 07:03:17 PM »

you bet man, where ya from??

yea theres a link in my signature http://www.mhdfl.com/forum/Glens-truck.mp3 you can listen to my truck

toeyota · « **Reply #7 on:** Jun 29, 2007, 08:48:19 PM »

Im from louisiana.

Haha that sounds cool as hell. What kind of exhast do you have? Also did you do all kinds of work to the head, or just that cam? Sounds awesome.

79coyotefrg · « **Reply #8 on:** Jun 30, 2007, 01:28:08 PM »

Quote from: toeyota on Jun 29, 2007, 08:48:19 PM

Im from louisiana.

Haha that sounds cool as hell. What kind of exhast do you have? Also did you do all kinds of work to the head, or just that cam? Sounds awesome.

old LC header, into 2 1/4 inch exhaust into see thru glasspack, then a turn down

yea 22R bored .060 oversize, (wouldnt go over .040 again) , head ported by me, milled .005, running a 3236 weber on a ported intake, swirl polished valves on 3 angle grind (removes all bures from valve) um

plasma moly rings, KeithBlack pistons OH and the crank was custom turned for 1mm more stroke

79coyotefrg · « **Reply #9 on:** Jun 30, 2007, 01:32:14 PM »

what part of LA im in Arkansas

toeyota · « **Reply #10 on:** Jun 30, 2007, 02:50:46 PM »

Ruston, la about 45 minutes from shreveport.

Truck sounds crazy, i know what all ill be doing to mine the next time i have to build it, haha. Thanks for all your help, ill definatly be hitting you up for some advice when i need to build an engine.

toeyota · « **Reply #11 on:** Jun 30, 2007, 03:34:29 PM »

Hey quick question. Im only getting about15-20 psi oil pressure at idle after the engine warms up. going about 55 it will get up to almost 40. Is this normal? I must mention that i have a cheap gauge and also it drips oil where the small hose goes into the fitting, at the block. Im going to get a new one, just wondering what the normal oill pressure is for these engines. I figure its slinging oil becuase a tad bit will sprikle out of the dipstick tub while its running. thanks!

79coyotefrg · « **Reply #12 on:** Jun 30, 2007, 05:55:31 PM »

you need to be running some castrol 20-50 thats what i run during the summer

fix that hose, if it breaks you can loose all

i said ALL of your engine oil in about a mile, $I\'m Down$ dont ask me how i know $I\'m Down$

with 20-50 i run 80 psi at start up, then as the engine warms it comes down, at 180* at idle i have about 40psi, on the road around 50-60 depending on rpm,
when the weather gets cooler i switch to 10-40 but NEVER USE WALMART OIL

toeyota · « **Reply #13 on:** Jun 30, 2007, 07:13:57 PM »

Quote from: 79coyotefrg on Jun 30, 2007, 05:55:31 PM

you need to be running some castrol 20-50 thats what i run during the summer

fix that hose, if it breaks you can loose all i said ALL of your engine oil in about a mile, $I\'m Down$ dont ask me how i know $I\'m Down$

with 20-50 i run 80 psi at start up, then as the engine warms it comes down, at 180* at idle i have about 40psi, on the road around 50-60 depending on rpm,
when the weather gets cooler i switch to 10-40 but NEVER USE WALMART OIL

Gotcha man. I was wanting to go to a thicker oil but i didnt know whether or not it was ok. Whats the different in that 20-50 than 10w30? just thicker? thanks again

79coyotefrg · « **Reply #14 on:** Jun 30, 2007, 07:17:32 PM »

Quote from: toeyota on Jun 30, 2007, 07:13:57 PM

Gotcha man. I was wanting to go to a thicker oil but i didnt know whether or not it was ok. Whats the different in that 20-50 than 10w30? just thicker? thanks again

yea just a little thicker, and get Castrol brand you wont be sorry , worth the money for sure

79coyotefrg · « **Reply #15 on:** Jun 30, 2007, 07:20:27 PM »

hey check it out http://board.marlincrawler.com/index.php?topic=34607.msg404052#new

toeyota · « **Reply #16 on:** Jul 02, 2007, 04:18:30 PM »

Hey man, did you have to rejet your carb? Im running the same carb as you and i got to reading about the correct adjustments...

so i went out and double checked mine, and it says if you have to turn the mixture screw out more than 2 turns then you should rejet to larger jets. Well i reset the mixture and idle screws and before it will run right i have to turn the mixture screw out about 3.5 to 4 turns. Just curious. I mean it runs great but it does feel alittle rich, not the best throttle response i feel i could/should have. Thanks.

79coyotefrg · « **Reply #17 on:** Jul 02, 2007, 04:29:42 PM »

sounds like your air jets are too small, i have 142 fuel 180air primary and 150fuel 185air secondary

toeyota · « **Reply #18 on:** Jul 02, 2007, 07:09:59 PM »

hmm ok then, ill look into it. Think it would run that much better by rejetting? whens that ride yall going on?

79coyotefrg · « **Reply #19 on:** Jul 03, 2007, 08:59:38 AM »

september 22-23

toeyota [OP]

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