Engine: Avanti r2

[jerry1]

Hello Everyone.

Took my Avanti R2 out for a spin today. It was a fun ride until I found out my top speed was around 60-65mph. The trans is shifting properly,but something is holding it back. I have a Mallory Dist and was think of re-curing it to a R2 Spec. Do you think that will work? I bought the kit at York this weekend. What springs should I use. Thank you again for all your help.

[PackardV8]

At what RPM?

Have you confirmed the throttle linkage fully opens the carburetor butterflies?

What ignition advance are you seeing at the RPM?

[53k]

Hello Everyone.

Took my Avanti R2 out for a spin today. It was a fun ride until I found out my top speed was around 60-65mph. The trans is shifting properly,but something is holding it back. I have a Mallory Dist and was think of re-curing it to a R2 Spec. Do you think that will work? I bought the kit at York this weekend. What springs should I use. Thank you again for all your help.

Sounds like a fuel starvation problem. Could be a clogged filter, a non-vented gas cap, a fuel line smashed almost closed (happened to me once- like to never figured it out).

[Xcalibur]

Or, fuel line rusting closed, from the inside out.

[ed ellis]

Although rare and much more likely with catalytic converters, check for an exhaust restriction-----rodent nests, a muffler or glass pack with collapsed internals will cause similar symptoms

[jerry1]

Thank you. I will keep trying.

[63 R2 Hawk]

Rancid fuel?

[studegary]

Unless you have one or more brakes dragging, I think that your problem is in the fuel system - fuel lines (either blocked or leaking air in), fuel pump, blockage in tank or line, fuel more than three months old.

[StudeNorm]

If you haven't found it yet, check for leaking intake manifold gaskets. Usually, but not always, you can hear that as a funny hiss or whistle. WD-40 sprayed around the runners should provide results if that is your problem. Spray it around your carb, also, as carb gaskets have a habit of drying out and leaking after so much sitting.