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

[type2man]

I ordered parts from CIP and they showed up two days later and I live across the country. My mailmans feet were on fire. You just need to make sure your throttle cable will reach the CSP setup which bolts onto the case at the lowest point and closest to the trans housing

[98101]

I ordered parts from CIP and they showed up two days later and I live across the country. My mailmans feet were on fire. You just need to make sure your throttle cable will reach the CSP setup which bolts onto the case at the lowest point and closest to the trans housing

I put in a request to CIP to find out when it will be back in stock. Failing that, order from CSP-shop.com in Germany I guess.

In other news, at the VW shop I finally got a glimpse of the current venturi size for these DRLA 45s:



He thought this size venturi might restrict the top end. The engine is 2366cc (71mm stroke with 103mm pistons) Web street cam, stock 2 liter valves. It has a lot of power already, so I'm not sure going to a bigger venturi than this would make sense since I also want it to be drivable.

Oh, I also put in the 123 Bluetooth distributor with a conservative curve for now. It will be fun to experiment with that once the carbs are sorted.