Zenith Stromberg CD 175 Needle/Jet modifications

General Chat About Exhaust, Cylinder Heads, Fuel Systems And Intake

Moderator: phpBB2 - Administrators

Post Reply
garrycol
Knows His Stuff
Knows His Stuff
Posts: 374
Joined: Thu Jul 16, 2015 2:47 pm
Location: Australia

Zenith Stromberg CD 175 Needle/Jet modifications

Post by garrycol » Sun Sep 22, 2019 1:15 am

I have got 2 Zenith Stromberg CD175 carbs from a 3.5 RV8 in a RV8 4.6 - they run the engine Ok but do not have needles/jets suitable for the larger capacity engine. Can anyone outline what mods such as larger needles and jets are required to be made to the carbs for the larger engine.

Yes I know there are alternatives to the CD175s such as injection and other carbs etc but today's question just relates to the above.

Thanks

Garry



paul c
Getting There
Getting There
Posts: 185
Joined: Tue Mar 11, 2008 7:41 am
Location: Takaka New Zealand

Re: Zenith Stromberg CD 175 Needle/Jet modifications

Post by paul c » Mon Sep 23, 2019 8:31 am


garrycol
Knows His Stuff
Knows His Stuff
Posts: 374
Joined: Thu Jul 16, 2015 2:47 pm
Location: Australia

Re: Zenith Stromberg CD 175 Needle/Jet modifications

Post by garrycol » Mon Sep 23, 2019 1:04 pm

Thanks.

garrycol
Knows His Stuff
Knows His Stuff
Posts: 374
Joined: Thu Jul 16, 2015 2:47 pm
Location: Australia

Re: Zenith Stromberg CD 175 Needle/Jet modifications

Post by garrycol » Sun Sep 29, 2019 2:09 am

So I guess no one has an idea = other than Pauls suggestion to buy the book.

I was hoping that someone had done it.

Cheers

Garry

unstable load
Top Dog
Top Dog
Posts: 1227
Joined: Mon May 04, 2009 6:53 am

Re: Zenith Stromberg CD 175 Needle/Jet modifications

Post by unstable load » Sat Oct 19, 2019 12:40 am

When it comes to needles and modifications, you are best advised to use a dyno or it will all be guess work.
Cheers,
John

User avatar
ChrisJC
Top Dog
Top Dog
Posts: 4641
Joined: Mon Nov 20, 2006 1:13 pm
Location: Northants / Cambs
Contact:

Re: Zenith Stromberg CD 175 Needle/Jet modifications

Post by ChrisJC » Mon Oct 21, 2019 6:54 pm

I had the same issue with 1.75" SU's. I had it rolling roaded at Wilshers Garage, Wimpole and it was a vast improvement.

I don't know if the old boy who did it still does it, and whether they can do Strombergs.

Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8

Post Reply

Return to “Exhaust, Cylinder Heads, Fuel And Intake Area”