87 Saltaire engine stunting /dying at 3500rpm with full throttle

[suprasaltareaud]

Hi guys. Have rebuilt the 454 in My 87 Saltaire after having 2 bent conrods. If I give it full throttle it takes off perfectly but at about 3500rpm with full throttle it stunts/dies like pushing the choke on an already warm engine. If I pull the throttle back a little it is fine but if I push throttle on further it stunts. I had the car by serviced thinking it may be the car by but didn't help.

Any ideas please.
Thank you.

[michael hunter]

Fuel pump pressure and volume , Fuel filter?

[cadunkle]

Float levels, particularly secondaries? Secondaries opening? Check timing and advance. About 10* initial and full at 34*-38* by 3000 RPM.

[suprasaltareaud]

Have replaced fuel pump with 80gpm and new fuel filter forgot to mention sorry Michael. Have checked timing although used a timing light without dial so might check with a better timing light. I'm will definitely look at floats. Secondaries weren't opening until it bent the arm that attaches it to throttle cable so it will make sure it is opening properly.

Thanks for advice. I will update once in have tested.

[Wulphie]

Have replaced fuel pump with 80gpm and new fuel filter forgot to mention sorry Michael. Have checked timing although used a timing light without dial so might check with a better timing light. I'm will definitely look at floats. Secondaries weren't opening until it bent the arm that attaches it to throttle cable so it will make sure it is opening properly.

Thanks for advice. I will update once in have tested.

Kinked or clogged fuel tank vent?

[suprasaltareaud]

Haven't had a chance to look into problem yet. Hope to get a spare our or 2 tomorrow to look into it. Will update then. Have to look into fuel air mix also. Will look up how to do as I don't think I have an external adjustment screw on the holly 600. Anybody know is there an easy way to check? Thanks.

[suprasaltareaud]

How do u adjust the advance? I thought it was vacuum based. Thanks

[Wulphie]

How do u adjust the advance? I thought it was vacuum based. Thanks

No vacuum advance on a marinized distributor, should have weights.

[suprasaltareaud]

So is it adjustable ? If so anybody have any directions please

Thanks.

[Wulphie]

So is it adjustable ? If so anybody have any directions please

Thanks.

Technically yes the advance can be adjusted but it is not something you are going to be able to do. Just make sure the weights and springs move freely.

Have you checked that the gas tank is venting properly? Always check the simplest things first.

[lively]

what is your timing ?

[Outsick]

Take the anti-syphon valve out of the fuel tank, replace it with a regular 90 and give it a try.

[suprasaltareaud]

Adjusted timing and fuel mixture on carb and now much better. Still missing a little but so much better. Will check spark plug gaps also. Thank you guys. I thought the timing was right but was a little to advanced.