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Old 06-13-2010, 05:21 PM
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tuning prob 750 blow through demon

hi guys i have a cleveland 351 twin to4 turbo set up, i bought a 750 blow through demon , I am having a bad surging problem under boost I was wondering if you guys have seen this before and could help me at all, thanks

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Old 06-14-2010, 02:42 PM
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Quote:
Originally Posted by colin j
hi guys i have a cleveland 351 twin to4 turbo set up, i bought a 750 blow through demon , I am having a bad surging problem under boost I was wondering if you guys have seen this before and could help me at all, thanks
Couple thoughts:

Can you describe this "surge" a bit clearer? Like under WOT, or just accelerating w/positive boost, top of the rev band, lower down?

Is the carb in a box or are you using a hat? What's the fuel system? Pump/regulator type and psi setting? Size of lines, type fuel, filters?

Any possibility this is valve train related- as in float/lofting valves, too weak springs, etc.?

What is the ignition system?
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