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Old 03-03-2002, 09:26 PM
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Unhappy 454 in my Model A Ford

Thank you all for your input. I really appreciate having access to all of your knowledge. I finally resolved this issue and I thought you might be interested in the cure. It turns out that this 3310-1 has a power valve in the secondaries (kind of superfluous). I removed and plugged using a Mr. Gasket plug, and the carb now functions properly revving nicely (even under a load) to 5500 RPM. In as much as the power valve accounts for 8 jet sizes, it was "washing out the plugs" above 4400 RPM or so (too rich). I couldn't imagine that this carb was jetted too rich with the factory jets for a 375 Horse 396 which is where the 3310 originated, but it was the power valve's contribution. Any way, thanks a lot for all of your ideas. I'm greatful to you all for your ideas.

[ March 21, 2002: Message edited by: sacrod ]</p>

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Old 03-04-2002, 01:56 PM
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i'm not an engine expert by any means..

although your rpm range does seem low, i know that hydraulic cams cannot rev as high as mechanical cams, don't know why.

This may have something to do with your problem.

JB
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Old 03-04-2002, 02:12 PM
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I just thought of something else.

Maybe an experienced engine builder can say for sure, but did you change your valve springs at all? I'm just thinking with a heavier cam maybe you need stronger springs?

Just an idea.

JB
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Old 03-04-2002, 03:52 PM
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I would check fuel pressure for starters.Its quick easy and will eliminate or confirm if fuel delivery is a problem.
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Old 03-04-2002, 04:50 PM
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That's the order I would go with;
[*] Fuel pressure and volume delivery
[*] Valve float (weak springs) especially if it begins to break down)
[*] Make sure the advance mechanism is not frozen in the distributor (also spring(s) broken
[*] Substitute a known good DELCO module in place of the Petronix and check the results.


If the advance mechanism is frozen and requires overhaul, have it setup on a distributor machine.

[ March 04, 2002: Message edited by: KULTULZ ]</p>
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Old 03-04-2002, 07:41 PM
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how about you buy a 460????
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Old 03-05-2002, 10:13 AM
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With the transmission in park and the engine running you say it wont biuld revs past 4400 or so. Does it make any sounds or start to run rough when this happens? If so I would check the incoming voltage that supplys the module. You will want a good voltage . If you can get a meter and check your voltage where it goes into the module and monitor it while you run it up to or past 4400rpm.Check your fuel pressure while you run it up to or past 4400 rpm .If the motor is brand new, who installed the cam was it put in and degreed properly? Who first fired the motor? Was the cam "broken in" properly , you may have wore some of the lobes down . A hydraulic cam ( flat tappet) like the one you are probably using has to be broken in, when the engine is first started. You will need a dial indicator to check that one.How long has the engine run? If it is real fresh still the oil should still be clean looking . If it is really black already that could be a sign the cam is worn also.
Hope this was of some help.
Good luck :-)
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Old 03-06-2002, 04:38 PM
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Don't forget the simple things, like is your linkage not allowing wide open throttle? total advance set? suffient fuel and pressure?
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Old 03-07-2002, 04:12 AM
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Is there enough Fuel getting to the Engine to run above 4400?
Check that the Fuel Pump can deliver enough Fuel to run higher and that the Fuel pipes allow enough Fuel to flow through them, and that they don't go through any sharp bends as this will slow the Fuel down and may even cause Turbulant flow.

hope this help
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Old 03-07-2002, 04:38 AM
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I may be wrong, but your cam duration and lift seem to be awfully mild for your 454 build-up. The cam's top-end rev limit is probably at 4400-4500 rpm's. I imagine that it has loads of low-end torque with this cam. I would modestly suggest, at a minimum, 310-320 duration with a .600+ lift. Call (also on-line) Herbert Performance tech line, and they will put you onto the right cam for your combo. I've had great results from their solid cams. Good luck.
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Old 03-07-2002, 06:06 AM
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Kultutz(?)
Get on the Y-Block chat site and ask, there are guys there who like thise thingies. We even had a Tri-Power Turnpike Cruiser at the Y Block Nats in Columbus last year. Went pretty good!
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Old 03-07-2002, 06:33 AM
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The flywheel governs your RPM. Your stats do not include this info. Are you using a "stock" F/W? Has it been changed? Is it now aluminum? Let me know.
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Old 03-07-2002, 08:47 AM
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[quote]Originally posted by sacrod:
<strong>I have a 454 chev with a edelbrock performer RPM a 3310-1 780 CFM Carb, HEI with Pertronix Moddule and Coil, A Crower 290 Hydraulic .510 lift, iron oval port heads with stock valves and large exhaust manifolds with 2 1/2 in. pipes and turbo mufflers. I cannot get this engine (all new) to rev past 4400 RPM or so. I have been all over the map with the timing (initial, mechanical and vacuum)and I'm sure that the secondaries on the Holley are opening. Does anyone have any ideas Please.</strong><hr></blockquote>
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Old 03-07-2002, 08:53 PM
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I sort of agree with NASTY NOVA. I have a 67 Mustang (sorry Nasty Nova) with a Crane hydraulic cam with roller rockers. The spec sheet for this cam shows operating cruise rpm at 3200-3800 with maximum rpm at 5000 and valve float at 6500. I have 10-1 pistons, 650 Holley vacumm secondaries, Edelbrock streetmaster intake (old version of performer) MSD6A box and full length headers. My rear end is a 3.25 posi with a toploader 4-speed stick. This car has loads of low end torque that I cannot get to the ground efficiently. I only rev the motor to about 4000-4500 before shifting as staying on the gas past 4500 is useless, so this car is strictly a stop light bandit and only drive the freeways at 65-70 mph to keep the rpms down.
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Old 03-07-2002, 10:35 PM
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are you running to valve float if not cams ok with springs check ign module and fuel supply . had 1 car drive me crazy would run good till on highway at revs and would not run for beans was pinhole in fuel line where it goes through frame . hope this helps
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