Keep Dellorto DRLA 45s and Bosch 009? Options

[98101]

I suddenly find myself owning 1970 4-cylinder 2.4 with Web hot street Cam idles nicely and pulls hard at WOT. Part throttle response is not great, often with carbs coughing and even backfiring on trailing throttle. My use is mostly street, so I'd like to get this part throttle stuff sorted.

Here's pictures of the stuff that's in there now. I guess that's the infamous Bosch 009 with no vacuum advance and a PerTronix 1847A. The carbs are Dellorto DRLA 45s with short velocity stacks and these tall foam things that don't seal against the air cleaner housings. I'm willing to learn about the carbs but I don't have much confidence in the 009 for running nicely on the street. Please correct me if I'm wrong about any of this stuff.

Also from other threads I gather that switching to EFI such as MicroSquirt would cost $5K or so ... though I'm not ruling this out completely. Correct me if I'm wrong about that.






Is this kind of linkage OK?


Here's the idle you may have seen in another post:

https://www.youtube.com/watch?v=-AC53RRrXOU


Any help you can provide is appreciated!

--Michael in Seattle

[MarkV]

Nyloc nuts are probably not what I would use but no big deal. The problem with them is they may want to unscrew the stud from the manifold when you go to loosen them. I would just snug them evenly.

[type2man]

Looks like you have the dellorto upgrade kit because you have the longer idle jet holders. Look inside and see if you have a fuel rail that goes across. These upgrade kits are good. I would start by removing the idle jets and the pump jets that are on the sides of the carbs and blowing them out with air. When reinstalling them, make sure the notch on the pump jet is pointing up. You'll need patience when reinstalling them so take your time. Then drive it and see how it responds. If that doesnt work, I would suspect the rubber gaskets which were used to stop the dellorto whistle