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]

The CSP products are higher quality, that will give you better and much easier adjustment as well as smoother throttle actuation, that's what I'm saying MarkV.

No doubt the CSP is a better set. I was just trying to get him up and running with what he has in his engine bay.

[98101]

No doubt the CSP is a better set. I was just trying to get him up and running with what he has in his engine bay.

Thanks Mark. I appreciate the time and attention you've put into helping me out. I owe all you guys many rounds of beer (or maybe tequila if we're in Tucson).

This morning Franklin's, a local air-cooled VW shop, showed me a new engine with the hex bar linkage working properly, so no doubt it can be done well. He also showed me an engine with the CSP setup.

I've lost some more confident in the condition of my linkage after seeing how much play mine has is in the transition from idle to light throttle (which is also where I've started getting the rough running again).



I think mine could be gotten to work, but the CSP linkage is so cheap and I like the way it unclutters the engine compartment. It's probably worth the $150 just to have people stop blaming the hex bar linkage.