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> Keep Dellorto DRLA 45s and Bosch 009?
98101
post Nov 25 2017, 05:44 AM
Post #1


Michael in Seattle
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From: Seattle, WA
Member No.: 21,495
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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.

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Is this kind of linkage OK?
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Here's the idle you may have seen in another post:


Any help you can provide is appreciated!

--Michael in Seattle
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Posts in this topic
98101   Keep Dellorto DRLA 45s and Bosch 009?   Nov 25 2017, 05:44 AM
GeorgeRud   I don’t think a micro squirt conversion runs tha...   Nov 25 2017, 08:37 AM
Mark Henry   Cheapest would be to ditch the hex bar and get a C...   Nov 25 2017, 11:14 AM
bandjoey   Buy the CBPerformance Dellorto book and your carb ...   Nov 25 2017, 01:04 PM
HarveyH   Once upon a time long, long ago in a galaxy far, f...   Nov 25 2017, 01:15 PM
98101   I found what might be the linkage Mark's recom...   Nov 25 2017, 02:18 PM
rhodyguy   Invest in the CB dell manual and a synchronizing t...   Nov 25 2017, 01:36 PM
98101   Invest in the CB dell manual and a synchronizing ...   Nov 25 2017, 02:34 PM
98101   You could buy a 123 dist for a carbed engine and ...   Nov 26 2017, 03:03 AM
rhodyguy   The Mallory distributor body is rather large. Dimp...   Nov 25 2017, 03:36 PM
porschetub   In your carb pic the vacuum advance port isn't...   Nov 25 2017, 04:03 PM
98101   In your carb pic the vacuum advance port isn...   Nov 26 2017, 03:34 AM
98101   In your carb pic the vacuum advance port isn...   Jan 5 2018, 03:25 AM
MarkV   I have a 2056 with Dellorto 40's. My car came ...   Nov 25 2017, 09:20 PM
98101   Bought a $75 used dual point Mallory and con...   Nov 26 2017, 03:18 AM
Mark Henry   Bought a $75 used dual point Mallory and co...   Nov 26 2017, 10:46 AM
thelogo   I assumed when you test drove the car it was runni...   Nov 25 2017, 11:39 PM
98101   Its a carbed , 91 octane , with headers brute . A...   Nov 26 2017, 03:10 AM
GregAmy   Its a carbed , 91 octane , with headers brute . ...   Nov 26 2017, 10:54 AM
MarkV   [quote name='MarkV' post='2551753' date='Nov 25 2...   Nov 26 2017, 10:49 AM
MarkV   Mine has a black cap... I bought a second one as a...   Nov 26 2017, 11:02 AM
Mark Henry   I think the black and red caps are interchangeabl...   Nov 26 2017, 12:38 PM
MarkV   In your carb pic the vacuum advance port isn...   Nov 26 2017, 11:27 AM
porschetub   [quote name='98101' post='2551799' date='Nov 26 2...   Nov 26 2017, 03:18 PM
98101   Not sure this engine would idle as per the suppli...   Nov 28 2017, 07:09 PM
98101   I don't believe those ports are active on Del...   Nov 28 2017, 06:21 PM
Elliot Cannon   My carb experience has been with Webers but your s...   Nov 26 2017, 11:55 AM
MarkV   I think the black and red caps are interchangeab...   Nov 26 2017, 04:59 PM
Mark Henry   Well ...I know I'm correct. Black the can (bo...   Nov 26 2017, 08:25 PM
Mark Henry   Vacuum advance doesn't play well with dual car...   Nov 28 2017, 09:03 PM
MarkV   I didn't realize that dual carbs don't pro...   Nov 28 2017, 10:09 PM
thelogo   Sorry but just want to make sure all the facts are...   Nov 28 2017, 11:20 PM
98101   Sorry but just want to make sure all the facts ar...   Nov 28 2017, 11:32 PM
thelogo   Sounds like you have a lot more experience with th...   Nov 29 2017, 12:20 AM
98101   As y'all advised, I bought an air-flow meter. ...   Dec 14 2017, 07:42 PM
MarkV   I always disconnect at least on carb from the link...   Dec 14 2017, 08:19 PM
98101   No reason to by new studs just measure them and t...   Dec 14 2017, 08:36 PM
MarkV   The studs are #10 X 32 thread size.   Dec 14 2017, 08:24 PM
MarkV   I fought with mine when I first set them up. Make ...   Dec 14 2017, 08:54 PM
MarkV   Maybe this will help you: https://www.youtube.com...   Dec 14 2017, 09:23 PM
thelogo   Yeh that throttle cable spring is intresting ...   Dec 15 2017, 12:14 AM
rhodyguy   Back the pass side idle speed adj screw off of the...   Dec 15 2017, 08:30 AM
craig downs   I have a 2270 with 45 Dellortos and a Mallory Unil...   Dec 15 2017, 11:39 AM
98101   I hope another newbie question is appropriate. I ...   Dec 16 2017, 05:04 PM
rhodyguy   I've never seen one like that. Neoprene? If yo...   Dec 17 2017, 01:42 PM
porschetub   Holy cr#p never seen base caskets like that,WAY to...   Dec 17 2017, 02:38 PM
rhodyguy   One thing at a time. Any VW/bug shop in the Seat...   Dec 17 2017, 03:38 PM
Mark Henry   IIRC those are CB performance gaskets, I think the...   Dec 17 2017, 03:55 PM
MarkV   My carbs had some thick gaskets somewhat similar t...   Dec 17 2017, 03:58 PM
Mark Henry   Just googled I was thinking dellorto "Jet Doc...   Dec 17 2017, 04:06 PM
98101   Just googled I was thinking dellorto "Jet Do...   Dec 17 2017, 05:01 PM
Mark Henry   Link to the dell parts http://vwparts.aircooled.n...   Dec 17 2017, 04:10 PM
MarkV   Nice that they are still available although mine d...   Dec 17 2017, 04:37 PM
Mark Henry   Problem is with what? If it ever did fail you...   Dec 17 2017, 04:58 PM
MarkV   Nyloc nuts are probably not what I would use but n...   Dec 17 2017, 05:36 PM
type2man   Looks like you have the dellorto upgrade kit becau...   Dec 17 2017, 07:00 PM
rhodyguy   I don't get how it could bow down that much.   Dec 17 2017, 07:07 PM
98101   So the gaskets weren't leaking (at least at id...   Dec 23 2017, 03:54 PM
type2man   Check to make sure the linkage arms both come off ...   Dec 23 2017, 04:48 PM
98101   Check to make sure the linkage arms both come off...   Dec 23 2017, 08:46 PM
MarkV   I does sound like it running on three cylinders. I...   Dec 23 2017, 09:36 PM
98101   If you look at my photo you can see that my actua...   Dec 24 2017, 01:18 AM
type2man   Perhaps the allen screws backed off and the linkag...   Dec 25 2017, 10:23 PM
98101   Perhaps the allen screws backed off and the linka...   Dec 25 2017, 10:54 PM
MarkV   It looks like the hex bar is adjusted all to way t...   Dec 25 2017, 11:44 PM
98101   It looks like the hex bar is adjusted all to way ...   Dec 26 2017, 12:06 AM
zig-n-zag   Different intake manifolds created the width diffe...   Dec 25 2017, 11:55 PM
MarkV   I could be wrong but I think he has all of the cor...   Dec 26 2017, 12:09 AM
MarkV   There are two angles to check. There is a front to...   Dec 26 2017, 12:25 AM
MarkV   Here is a photo from directly above. See how there...   Dec 26 2017, 12:40 AM
rhodyguy   The CB linkage should be spring loaded on both sid...   Dec 26 2017, 08:18 AM
Perry Kiehl   From what I can see in post #43 the thick intake g...   Dec 26 2017, 10:28 AM
MarkV   So you're saying my car is a Yugo because it h...   Dec 26 2017, 10:53 AM
rhodyguy   The pictured linkage has been around. Stuff wears ...   Dec 26 2017, 11:39 AM
Perry Kiehl   The CSP products are higher quality, that will giv...   Dec 26 2017, 12:20 PM
MarkV   The CSP products are higher quality, that will gi...   Dec 26 2017, 12:34 PM
98101   No doubt the CSP is a better set. I was just tryi...   Dec 26 2017, 05:08 PM
MarkV   A new linkage and maybe some new carb base gaskets...   Dec 26 2017, 05:53 PM
type2man   I ordered parts from CIP and they showed up two da...   Dec 26 2017, 09:11 PM
98101   I ordered parts from CIP and they showed up two d...   Dec 28 2017, 12:07 AM
98101   I'm trying to put the CSP Type 4 Porsche kit o...   Jan 4 2018, 07:33 PM
Perry Kiehl   There's usually only about a half turn on that...   Jan 4 2018, 08:06 PM
MarkV   Needle nose pliers or small set of vice-grips. Put...   Jan 4 2018, 08:21 PM
98101   Needle nose pliers or small set of vice-grips. Pu...   Jan 5 2018, 01:10 AM
98101   I had to use more like 8 ft/lbs of torque (twice t...   Jan 5 2018, 02:18 AM
98101   I unscrewed the pushrod (why is it called that whe...   Jan 5 2018, 05:47 AM
rhodyguy   On a set of 45s I have, that open port has a small...   Jan 5 2018, 07:46 AM
Mark Henry   I'd look to see if I could find a brass tube t...   Jan 5 2018, 09:29 AM
98101   If you have a vac advance dizzy that's the fi...   Jan 5 2018, 02:37 PM
914_teener   [quote name='Mark Henry' post='2564554' date='Jan...   Jan 5 2018, 03:33 PM
98101   I'm just wondering that with a programmable d...   Jan 5 2018, 04:27 PM
Perry Kiehl   A thin 8mm open end wrench is the thing to snap of...   Jan 5 2018, 12:39 PM
98101   For some reason the right carburetor wasn't as...   Jan 6 2018, 01:21 AM
rhodyguy   Cork gasket under the fill Tower assembly? You can...   Jan 6 2018, 07:34 AM
98101   I didn't try adjusting the CSP linkage until t...   Jan 9 2018, 09:13 PM
98101   Once the linkage was dialed in, I started the car,...   Jan 9 2018, 09:27 PM
98101   I couldn't see how changing the linkage and ad...   Jan 9 2018, 09:38 PM
98101   The next morning I limped the car (with frequent b...   Jan 9 2018, 10:19 PM
98101   The Road Test VW shop owner asked me to drive aro...   Jan 9 2018, 11:02 PM
mobymutt   Thanks for sharing this! I'm also in the ...   Jan 10 2018, 08:32 AM
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