Jump to content
Caseyjames

Need help getting my Side draft Weber’s dialed in...

78 posts / 2456 viewsLast Reply

Recommended Posts

Hey guys. I could really use some help/advice. Almost three years ago I rescued a 1976 2002 from a garage In Southern California that had been sitting for nearly 15 years. Had a mechanic there go through the car extensively to get it running. It has excellent compression, a schrick cam, dual DC45 Weber carbs and a Korman intake. When I had the car shipped over to me in western MA it was running “decent” but seemed super rich, would get really loaded up when idling/under 1500 RPMs, has a timing surge on the highway and a massive intake leak. Did a ton of research, adjusted the carbs and made it a little better, converted to electronic ignition, and fixed the intake leak. But still runs rough. Messed with timing, found TDC, timed it- this helped a little, but still can’t get it dialed in. It’s super Happy at wide open throttle but hates cruising around town and has a massive misfire/stutter (pops/backfires through the intake) especially when letting off throttle and coasting in gear. I’ve brought it to two local “specialized” euro mechanics in western Ma but to no avail. I’m about ready to give up. Is it possible to actually get it to run Right with the set up I have or lost cause? I can send all the invoices as to what’s been done or helpful. Any advice (specifically a good mechanic in New England that could help) would be much appreciated. Thanks! 

AB977015-977A-40FD-93A1-F87F7401B57A.jpeg

  • Like 1

Share this post


Link to post
Share on other sites
(edited)

Not going to get into precise jetting. 45s and a cam above 292 is going to be at the limit of "streetable" when picking up your dry cleaning or getting granola at the co-op. 

Piston specs, compression numbers, leak down numbers. Cam, current jetting, float levels, emulsion tube fuel levels, timing, ignition components, fuel grade. Throttle position observations, carb sync, what plugs, plug reading....

Or you can just take a hose to your ear and the velocity stack and work from there.

 

Good luck

 

YMMV

Edited by Guest_anonymous
YMMV

Share this post


Link to post
Share on other sites

I had 45DCOE's, Schrick 304, w/11:1 CR, Pertronix settled in a tii distributor.  was able to get it to idle at 500 rpm. it was very "streetable," however, not a lot of power until 2700 rpm and up. All on pump gas (premium only).  It can be tuned.  

 

Matt

 

Share this post


Link to post
Share on other sites

Do you know how the carbs are jetted, or at least what venturi size you've got? What grind is the cam? How did you time it? What do the plugs look like after idling and after normal running? Need some basic info before diagnostics can be started. Baseline first, then adjust.

  • Like 1

Share this post


Link to post
Share on other sites

What did you set timing at?

How are the carbs mounted to manifold?

Share this post


Link to post
Share on other sites

Thanks everyone for your input.

1. The Jets: I don’t know the exact size, the mechanic just said he called Weber and “jetted them according to their original spec” I can try to get some more information though.

2. Plug condition: I’ll try to attract a pic of the plug as well as the invoices as to what’s been done so far.

3. Timing: Set the timing according to the specs I found in an old Haynes manual, but not sure If that’s accurate due to the cam? I took a paint stick, found TDC on the flywheel by the timing ball and then used a timing light to line it up through the peep hole on the bellhousing. 

 

Ill also attach a pic a pic of the engine so you can see how the carbs are mounted. 

AE0FC939-DD82-4389-B7EF-C0CBCC38CCA6.jpeg

A176FE9D-0F64-481B-AC5B-761E571845FF.png

16C3B009-E648-4334-9249-CC6C70C2DA56.jpeg

Share this post


Link to post
Share on other sites
(edited)

Casey,

 

If you’d like someone to set it up for you, I’d trust SCR (Sports Car Restoration) in Plainville, Connecticut (just west of Hartford). They are one of the best ‘02 shops in the U.S.

 

Regards,

 

Steve

 

Edited by Conserv

Share this post


Link to post
Share on other sites
3 minutes ago, Conserv said:

Casey,

 

If you’d like someone to set it up for you, I’d trust SCR (Sports Car Restoration) in Plainville, Connecticut. They are one of the best ‘02 shops in the U.S.

 

Regards,

 

Steve

 

Awesome! Ill Give them a ring tomorrow👍🏼

Share this post


Link to post
Share on other sites

Looks like the start of a decent formula. Sounds like there is an electric fuel pump. Keep pressure around 2psi. Check float levels. Time to max advance of 32-35° at 3500 rpm pull back from any pre detonation. If it is hard to sync the carbs short of twisting the butterflies I would suspect there is a lope in vacuum in the firing order due to the 20psi drop between 4 and 2. That might be some of the in between read of the cylinder head rebuild and not the bottom end. Purely internet speculation ymmv 

Share this post


Link to post
Share on other sites

Also don't discount your mechanic's comment about the distributor and timing advance. Check to see if you have something approaching a proper advance curve.

 

Cheers,

Share this post


Link to post
Share on other sites
9 minutes ago, ray_ said:

Also don't discount your mechanic's comment about the distributor and timing advance. Check to see if you have something approaching a proper advance curve.

 

Cheers,

Good call, excuse my lack Of experience- but what/how is the best way to check or test that?  

Share this post


Link to post
Share on other sites
30 minutes ago, Guest_anonymous said:

Looks like the start of a decent formula. Sounds like there is an electric fuel pump. Keep pressure around 2psi. Check float levels. Time to max advance of 32-35° at 3500 rpm pull back from any pre detonation. If it is hard to sync the carbs short of twisting the butterflies I would suspect there is a lope in vacuum in the firing order due to the 20psi drop between 4 and 2. That might be some of the in between read of the cylinder head rebuild and not the bottom end. Purely internet speculation ymmv 

Ok, awesome advice. I’ll try to mess with the timing again and go from

there. Thanks again for all you input, appreciate it so much. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.