snowprophet1 Posted April 10, 2004 Report Share Posted April 10, 2004 I found the timing curve in the banshee manual, and it really seems to drop off a lot! I advanced my timing a couple of degrees, but it drops off so drasticly, it should probably be re-curved instead of just advanced a couple of degrees?! What is up w/a timing curve like that? (I tried to attatch a picture but can't do it). Quote Link to comment Share on other sites More sharing options...
banshee76179 Posted April 11, 2004 Report Share Posted April 11, 2004 How much did u advance it... Around here pretty much +4 is the way to go! Quote Link to comment Share on other sites More sharing options...
snowprophet1 Posted April 11, 2004 Author Report Share Posted April 11, 2004 (edited) I only had it 2* advanced, but I just advanced it to 4* tonight. I can go more if I have to, but what puzzles me is why does the timing drop off so much the higher you rev it? Although the better the gas atomizes (higher velocity through the carbs) the better the burn, but gas only explodes at a certain speed period. The higher the rpms, the sooner you should be lighting it up (to a certain degree of course). Other factors come into play, but it just seems that the curve doesn't need to retard so much on top end . Any answers are welcome. Edited April 11, 2004 by snowprophet1 Quote Link to comment Share on other sites More sharing options...
Banchetta Posted April 11, 2004 Report Share Posted April 11, 2004 The stock curve is designed for port specs as well as the stock exhaust. The stock exhaust peaks out at 6500 rpms. Any aftermarket exhaust will peak at 8500-11000 depending if you have a high rev or torque pipe.....I've done some dyno testing w/ stock cylinders and ported cylinders w/ a 4mil stroker and both setups like the +4 degrees the best across the WHOLE curve. So I'd say the stock curve is pretty accurate....I've got a dyno sheet w/ 0, +4, and +7 timing to compare. I'll post them tonight.... Quote Link to comment Share on other sites More sharing options...
snowprophet1 Posted April 11, 2004 Author Report Share Posted April 11, 2004 Wow! I'd like to see those dyno sheets. I never thought a curve like that would hurt the top end w/7 degrees advance. Maybe they did their homework when making that timing curve. Thanks for all the help! Marc. Quote Link to comment Share on other sites More sharing options...
Banchetta Posted April 11, 2004 Report Share Posted April 11, 2004 (edited) Here you go.. Edited April 11, 2004 by Banchetta Quote Link to comment Share on other sites More sharing options...
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