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SU carb
Posted by: bmwtodd1 ()
Date: January 05, 2021 05:42AM

I know articles have been addressed about the SU carb for turbo application. I have an HD8 that I plan to use, and also a 65 YH as an option. Can anyone point me to the article? Also looking to buy a SU adapter, or one to borrow, so I can machine one.

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Re: SU carb
Posted by: steve c goodman ()
Date: January 05, 2021 08:18AM

The most detailed article was in COMMUNIQUE Dec 1980 by Bob Matthew, Peter Jacob also wrote a couple or three smaller articles that were in COMMUNIQUE through the years. Looking in 'tech topic index' OR maybe in CORSA tech guide should turn them up too.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC/V8 Registry

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Re: SU carb
Posted by: Darrin ()
Date: January 05, 2021 09:51AM

Clarks had their SU adapters on clearance for cheap not so long ago.

Darrin Hartzler
Bethesda, MD/Catlett, VA

Northern Virginia Corvairs & Group Corvair

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Re: SU carb
Posted by: bmwtodd1 ()
Date: January 05, 2021 02:22PM

Thanks, I will see if they have any left.

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Re: SU carb
Posted by: roger65180 ()
Date: January 06, 2021 06:58AM

all tho I have very little SU experiance I will take a jab at this , I have an hd8 also it came with the needed adapter in the same parts purchess I also got a 1.75 SU I made the adapter for that carb, Not realy that hard. I put the 1.75 carb on my car and test drove it , it was easy to start and after adjusting Idle mix it was ready for test drive it did everthing well including boost . My main concern is will it go lean when you really shoudnt ( high boost 15psi ) it has a very small fuel bowl so you will have to be at the max fuel psi the carb will tollerate .then I had the hd8 repaired and installed it, it was very finicky and hard to get stable idle , I DO NOT BLAME THE HD8 I believe there is still a problem with the 1 I have and since I have run a QJET for 20 years I went back to what works for me. I also know a fellow in new york that runs a 2 in SU in his road race car for years

Roger R
Madison Wi
62 ct pg turbo
65intercooled 180 4sp,autocrosser
62 Rampy

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Re: SU carb
Posted by: Phil Dally ()
Date: January 06, 2021 06:37PM

The SU is a fine carburetor for street and asphalt racing.

Make sure to install a very good air filtration system.

If any dirt or silt gets in the venturi it will hang up.

Making a lean condition...burning exhaust valves.

Ran an H8 and double E-flow Rajay in landspeed.

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Re: SU carb
Posted by: Phil Dally ()
Date: January 06, 2021 06:45PM

Built my adapters starting with the three bolt pattern.

Then the 3" E-flow finishing up with the 500 Holley.

SU got silt from the dirt track one too many times.

My humble recommendation is put a Holley on it!!

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Re: SU carb
Posted by: Chilly Willy ()
Date: January 12, 2021 05:30PM

I have an unopened a crown adapter SU kit (with some surface rust on the hardware)and a Dirty Su carb for sale. $200 plus the ride.




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: SU carb
Posted by: chuckvh ()
Date: January 12, 2021 05:45PM

PM sent

Chuck vonHofen
Brentwood, California

66 Corsa Turbo Convertible
64 Spyder Convertible
64 Spyder Coupe
62 Monza Convertible
Amazingly Patient Wife

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Re: SU carb
Posted by: Chilly Willy ()
Date: January 12, 2021 05:53PM

PM Replied




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: SU carb
Posted by: Chilly Willy ()
Date: January 12, 2021 06:09PM

Sold




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: SU carb
Posted by: Chilly Willy ()
Date: January 16, 2021 05:48PM

Good meeting you today Chuck, looking forward to seeing the SU in action.




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: SU carb
Posted by: chuckvh ()
Date: January 16, 2021 11:09PM

Thanks again Will! Found my copy of the Dec 1980 Communique, ordered two SU manuals, and already checked it for installation clearance on the 62 Vert. Hope to have the car running in a couple of weeks (mechanicals are all done, wiring of all the add-ons and instruments in progress). It's a nice 64 Spyder motor with a F-flow/B-flow turbo, Dale vacuum advance/pressure retard distributor, Snow Performance water/methanol injection, and wide-band A/F oxy sensor. Starting off with a 180 HP YH, then when the car is dialed in I'll be playing with the carb changes. Have 45 DCOE to try out, a Holly 390 prepped for the turbo, and now the SU to play with. This is actually a "mule" motor that belongs to my Spyder coupe, with the "real" engine sitting in multiple boxes of new parts waiting for final cam selection. My wife shakes her head a lot these days...

Chuck vonHofen
Brentwood, California

66 Corsa Turbo Convertible
64 Spyder Convertible
64 Spyder Coupe
62 Monza Convertible
Amazingly Patient Wife

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Re: SU carb
Posted by: Chilly Willy ()
Date: January 17, 2021 07:12AM

Nice! Thanks for the engine case. Pretty sure your wife said ”if you buy something
You need to get rid of something” grinning smiley




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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