351w timing help PLZ!

[68stang73]

I have a 351w .030 over. msd pro billit with street fire ign. i have the 35-601-4 mutha thumper cam.i set timing to greatest vac and had 9hg checked timing and was 25 degrees. throttle responce was awsome. alot of peopl say its too much. i have it now at 17 initial without vac adv plugged in and 35 total. dead spot in carb good power but not what i expected. i have a 650 speed demon carb. i drive this on the street and hwy. will setting this @ 25 and total @ 36 hurt my motor? i dont want to burn it up. but i do want the power i built this for. anyone out there can help me that has delt with this cam before?????

[amick]

As far as your 25/36 timing setting goes, if the motor is not high compression the timing settings should be ok. Can you tell me what the compression ratio is? Honestly it seems like the there may be another issue with the motor though if it wants that much timing. I noticed you said you are using a Street Demon Carb. This may not be the best carb to use with the low vacuum the Thumpr cam is producing. This is something you might call Demons tech line about as they will be the expert there. I apologize if you felt ignored but I did not see your question as it is not under the normal Comp Cams tech area. Fortunatley someone e-mailed me a link to it so I could get you an answer.

[68stang73]

i am in the 9:5:1 compression area. and yeah i did call demon and of course they said it will work just fine. i have found out tht i may need to get a different power valve to help with the low vac it is producing. i have it now at 20 initial and it seems the dead spot in carb is gone but i cannot drive it due to nasty snow storm now. i did put it in gear and applied break and slowly gave it gas to make it stumble and it seemed fine tht way. so who knows...ill report this to my mechanic when i drop the dizzy off again he had ordered a adjustable vac adv for the msd and we will discuss the bench tunning.