Won't pull past 6000

[buguy]

PLX is a bit cheaper and everyone i know has had good luck with them. Including myself.
https://www.plxdevices.com/ProductDetails.asp?ProductCode=897346002719

[King_vw61]

Plx is good I have one also. But no recording options at all. Just a gauge. When you can look at a graph and see exactly what the car is doing for the entire drive instead of trying to watch it and drive.
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1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
https://www.instagram.com/king_vw61/?hl=en

[madmike]

what size exhaust Header? what goes in must come out , seen this happen with 1 5/8"
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[58 Plastic Tub]

[dwightly]

Hello Mike. The headers are 1 3/4" . I believe I bought it from you several years back.. I will check throttle wot when I get home.in a couple of days.

[King_vw61]

my pulling issue was 100% bad valve springs, they can go bad fast if your floating the valves... Or if they are set up wrong
_________________
1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
https://www.instagram.com/king_vw61/?hl=en

[dwightly]

Tims set them up .I double checked them. About a 1000 mi. on them.

[mark tucker]

exhaust/muffler, air filters,fuel return returing tomuch,what do the plugs look like on a clean cut run?low voltage to the coil,throttell opening,cam off a tooth or 2.....if it's valve float you should be able to hear that....well some can and some cant. dead/dying coil wire...sealed engine compartment making the carbs&fan compeate for air...tach on the rong setting

[74 Thing]

Post a photo

[dwightly]

Mark, I'm suspecting coil supply voltage and or tach wiring cuz my tack is erratic.was going to run direct wire from alt batt pos to coil positive first.if that doest work i will disconnect tach from coil.hopefully that's the problem

[dwightly]

How does valve float sound like ?

[King_vw61]

Instead of pulling it will lay over and the engine pitch will change.
_________________
1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
https://www.instagram.com/king_vw61/?hl=en

[dwightly]

Like a lower pitch ?

[King_vw61]

Lower or level out kinda. Drive a stock bug and don’t shift. At 4K or a little above the valves will float. Sounds like that.

Or you stop feeling it pull using your butt Dyno.
_________________
1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
https://www.instagram.com/king_vw61/?hl=en

[dwightly]

When it does it ,it sounds like it choking or gasping for air kinda.i know its actually not an air restriction problem(stand off lid,no air filters or stack screens).hard to believe its valve float with properly set up new cb650 springs tho.

[74 Thing]

Get out your multimeter and check out the ignition.

[evanfrucht]

If you keep flooring it at the 6000 mark what does it do? Does it want to just die out? Does the firing get erratic or does it full on stumble like poor mixture?

Could it be a bad ECU or coil that isn't able to handle the RPM?
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1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder )

[dwightly]

Boggs down.like its runs out of fuel.lower sounding engine tone

[nsracing]

18-degrees of initial timing? why so advanced on idle? That may be your problem there.

and what size venturis?

[Bill Schwimmer]

The oval gas cap is not vented enough. I have run into this before. Try a little run with the cap off. If it still does it. Look elsewhere, but the tank still needs to be vented.