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Guys... canīt set the initial Timing on a mild 455 to nearly 10-16 degr. after a cam swap.
Old cam was the Cam Comp cam 260H (not Xtreme Energy)- the new was one stepper higher 268H with cloyes timing chain in combination with a new harmonic balancer : http://professional-products.com/har...armonic-damper
The old and the new cam was degree and break in.
Both cams are mild cams in the 212 to 218 degr. range
No vacuum leak.
Now the problem:
as i put the HEI Distr. in the same position in the engine like i do with the 260H, i canīt set the timing as i say above at 10-16 Initial.
The best what i handle was 25 deg. with vacuum can touch the intake.( SEE PIC @ TDC)- it run -not well but it run- but have heavy starting problems with this timing-
With the 260H i can set the Initial at 16deg. but vacuum can touch the firewall and no chance to get the 17 or more degr.
I try try to put the finger a few position clockwise and c.clockwise to see if it helps but i canīt the engine run smooth & get the correct readings ...so whats wrong here.
How i can handle it to set the timing in 10 deg. area ?
New 268H cam -
Initial 25deg.-
TDC -
Red mark at firewall was the finger position with old cam!
Turn the engine to TDC by hand then install the distributor so its pointing at cylinder 1. Cylinder 1 is driver side closest to you when youre standing in front of it. It will be dead obvious when you have it in right. There is a Ford setting and an Olds setting on some timing sets but if you said you were able to degree it then you got it right.
Okay , i position the HEI one toth counter clockwise ( engine donīt start)
Than i position the ignition cable one position counter clockwise like the pic
- Engine start but i canīt become more than 12 degr initial timing because vacuum can hit the firewall.
Engine run, but not perfect...seems engine need more .
January 28th, 2018, 12:54 AM
