ve3ray

Hello all.
Ok here goes I have a 351 Windsor that I cant seem to get running right.
This is not my first time sending a message on this motor but it is on this problem.
Here goes when the car gets hot its seems to run rich and fouls up the plugs.
I have been all over the map with jetting 750 dbl Demon.
I just put another carb on 750 holly vac secondary.
That still did not solve my problem with the plugs.
So what I did was a compression test.
Here is some info on motor first.
Trw 8.5 comp forged pistons, Dart Windsor Heads 64 cc.
Cam is Comp cam FW XE284H-10
Lift Intake 541 Exhaust 544
Duration &.050 240 Intake Exhaust 246
Ok here is what I found after compression test.
Please keep in mind that this test was done on a room temperature motor.

(Plug Compression ) ........... ( Condition )

#1 102 ........................ Very Black
#2 97 ........................... -----"-----
#3 105 ......................... -----"-----
#4 98 ......................... ----"------
#5 103 ........................ Running Good
#6 98 ......................... -----"-----
#7 100 ......................... -----"------
#8 102 ........................ Very Black

Yes I know it should be hot but I did a test on #1 102 hot and also # 5 103 hot no difference from cold.

OK thats it by the way the motor is Farly fresh maybe 200 miles on it.
Heads where just done also new guides and flow work.
So as you can see it driving me crazy any Ideas ???
I need help lol.
Thanks in advance Ray.

Attached Images

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RobertXW

Hi Ray,

I have a similar combo, except cast heads, I solved my problem with jetting, idle mixture adjustment, and going back to "stock" Bosch plugs.

What plugs are you using ?

What HP are you getting out if this combo anyway ?