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

[porschetub]

In your carb pic the vacuum advance port isn't capped off ??
If you are infact running a 09 it will need to capped off,check the other side carb also ,you may or may not have the same there.
Do you know the spec's of the carbs ?? ,been said many times but they are still large carbs for even a 2.4 if not setup right...that will leave a very soggy mid range if not right.
If your carbs are close to being dialed in you could try a vacuum advance dizzy such as the SVDA or 034 (?) Bosch type if you have vacuum ports on both carbs ,larger carbs and a hot street cam will most like see the 09 being even less desirable.
Are you running the right fuel pressure ?,is your fuel from a regulated source or direct from a LP pump ?.
Someone like John Walker will most likely need to see the engine fully tuned (plugs ,leads,timing and valve clearances ) before he will attempt tuning the carbs ,that's the order its done in.