I recently purchased a new carb (Holley 670) and was wondering what was involed in putting it on. It does not really seem that hard but I dont want to leave anything out. Did the mav come with a radiator overflow resevior. I need one and dont want to spend 50.00 on an aftermarket one.
My cars were built prior to 1973 and none of them were equipped with overflow tanks...just discharged by hose to the ground. Not knowing what carb your swapping from its hard to say what probs you may have. The only Holley I ever put on I was pulling an Autolite off and it was no prob at all, some slight tuning on the air to fuel ratio and it worked perfectly.
In that case it should just bolt right on but you might wan`t to look both of them over before you dig into it
None that I'm aware of...just snug em up good. I run a light bead of RTV caulk around both sides of the gasket also.
thought of a problem. The new carb has electric choke. How do I wire that in. I have a Mallory 6 ignition box and an MSD dist. (I wish this thing would have come with instructions but thats the price you pay for saving money on used items)
The choke wire runs off the back of the alternator, if your original was electric than the wire is already there. If not, you can run off any source of ignition positive. Do not use battery positive, just ignition positive. The only other difference might be your fuel intake lines. If your 650 is a double pumper, you may have dual fuel inlets, where all the 600cfm carbs have single inlets, for the most part. Check before you start, and if you have dual inlets, you will need to buy the lines. Buy a name brand, the Summit house brand stuff is cheap and leaks more often than not. You don't need rtv to seal the carb to intake. A fresh gasket will be fine and require no clean up down the road. You shouldn't need rtv for anything vacuum related.
OK I ran into a problem. Apparently one of the carb mounting studs had been striped out of the intake before and not fixed. What should I do, helicoil or by a new intake. The old intake is (I think) a single plane holley street dominator. It has one big intake hole instead of a split intake hole. With this being a street car, I figure a dual plane should put the power where I need it. I was thinking of going with the Edelbrock Air Gap but am open to suggestions. Engine specs are as follows: 306 cid Holley 670 street avenger Intake _to be determined 351 windsor heads - ported (upgrading to AFR next year) Headman 1 5/8 headers TRW forged pistons (compression ~9.5:1) Comp Cams 270h C4 2500 stall (changing to T5 next year) 3.00 open rear (3.55 or 3.80 locker next year) Thanks
I will be installing my new intake this weekend. There is a heat difuser plate between the carb and intake. Is it really needed? I also removed my valve covers to do some customizing. Someone mentioned to me that I might want o check my valve lashing. Any idea on what it should be set at and how to check it? Thanks for the help.
Your cam is hydraulic. Unless you are hearing any funny noises, I wouldn't worry about valve lash. That's a concern for mechanical cams mostly, not hydraulic. A Performer RPM would be a good manifold for that combo.
the intake is actually the Edelbrock air gap. I hope I picked a good one. Anyway, thanks for the info.
Your cam is hydraulic. Unless you are hearing any funny noises, I wouldn't worry about valve lash. That's a concern for mechanical cams mostly, not hydraulic. A Performer RPM would be a good manifold for that combo.
