Backfire
Hi guys,
I understand that a single point dizzy will be no good for high rpm. It pulled 7000 back in the commo with the twin point lol, the engine is in a 4x4 now and could really use a torquier cam. I converted the current dizzy with to an optical pickup with a crane xr700 conversion kit. In an effort to find the cause of carb backfire I threw points back in, ill get around to re-instating the xr700 shortly.
As for the back fire, when free revving the engine I hold the revs up at about 1000 to 1500 then crack the throttle wide open, CHOOF, back fire, from what I can tell there is no flame (riding valve on compression stroke?) the revs then pick up.
When driving it constantly back-fires during acceleration under load, once the revs get up it seems to be ok. I can sometimes avoid the backfiring by gently feathering the throttle up to speed.
Point to note, i did put a new power valve in the holley a while back....
Your thoughts?
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