MIKE 1985

i have a rebuilt new 355 and i have some questions. This is the original motor out of the car and i reused the orig. block, crank,rods, balancer,covers etc. new parts are iron eagles,cam, weiand stealth, summit HEI 750 vac secondary.


1- for some reason to get the car to run properly i have to set the initial timing to 21 deg. even then it doesn't have any difficulties starting when 180 deg. ??


2-the pcv valve is in the pass valve cover and to the back of the intake to a port, it's always clattering, or actuating. when i pull it out and cover the bottom up with my thumb it slows the motor down ? Is this normal ?

the cam is 224-234 @.050 112LSA. it has 14" of vaccume at idle.

any suggestions ?

StealthElephant

I'm running the CC XE268H cam with 10.7:1 compression and I've been told I have to run 14*+ initial timing. My engine idles better with more initial timing. If someone wants to exlain why that is they can cause I don't know.

My Holley Street Avenger has a port on it that was marked PCV, thats what mine is connected to, it appears to work fine. I have my brake booster connected to the vacuum port in the rear of my intake manifold.

MIKE 1985

thanks.

The engine builder also told me it's not uncommon to have to run 18-20 deg initial with this cam. 224-234 @ .050 112LSA

Stekman

The best way to determine what timing to run is to turn on your engine and do some good old test and tune. Yes the cam has some determining factors on timing, but so do many things specific to that engine. you can START with that timing, but the thing to do is get a timing light if you dont have one, and adjust and test it out.

MIKE 1985

i agree with that, it just seems that it runs best with 20 initial, i thought it was way off, but the car seemed to run decent.

Then i noticed the pcv valve was just clattering away at idle, i pulled it out and covered it and the motor slowed down, just like a vac leak. I didn't know at the time that a faulty pcv valve could cause a vac leak, i have learned otherwise today.


How many of you run pcv valves as opposed to a push in breather ?

Stekman

I run PCV with a Spectre clear fuel filter inline on the vacuum line.

89RsPower!

Just about everyone that knows what a PCV valve does runs one. I have a PCV valve in one cover and a breather in the other.

MIKE 1985

that's what i was thinking, just wanted some confirmation on it.

thanks