• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)

MGB HS6 or HIF4 bolt right on in place of Stromberg?


The bolt pattern on a HS6 looks right to replace the Stromberg, will it work as a single carb replacement?
Besides replacing the manifolds and going with a pair of carbs, what are my options? Some other side draft carb?
This is on my de-smogged 1980 MGB.


Staff member
Country flag
If you scroll down at this website and look at the chart, you will see that it appears to be a bit small.

That said, if you look at note #2 on the chart you are probably fine. I run a single HS4 on my 1500 and it is great. Typically you want carbs a little smaller rather than a little bigger.

At least as a stop gap it should get you going and almost anything will be better than the ZS.

As I commented on a different bulletin board, the HIF6, HS6, or HIF44 is a direct bolt-on replacement for the ZS175.

I ran an HIF6 from an Austin Marina on the combo intake/exhaust manifold of my 1978 MGB for several years.

The HIF6 is basically the same as the HIF44.

It was a bolt-on conversion, other than the need to run a manual choke to the cockpit.

Performance was OK....it was the manifold that restricted the system.

I've since switched to dual HS4s

. HIF-6_3.jpg K and N Air Filter Taper_1.jpg

Marvin Gruber

Country flag
Put dual SUs on it. I can sell you a set with intake manifold for $100 and shipping. Carbs will need cleaning and kits but otherwise good. Just PM if interested.


Great Pumpkin
Country flag
Marv said:
Put dual SUs on it. I can sell you a set with intake manifold for $100 and shipping. Carbs will need cleaning and kits but otherwise good. Just PM if interested.

:iagree: The SU's are just about bulletproof.


That's what I really intend to end up with, and I'll need to go with an earlier exhaust manifold and get rid of the catalytic converter as well.
If I put on the earlier exhaust manifold what do I do to mate it up to the rest of the exhaust?
Do I need the "test pipe" to mate to the lower end.
Or does it present another issue to deal with down there?


Sent you a couple PMs but no answer yet, I am interested in your offer - please get back to me.

Put dual SUs on it. I can sell you a set with intake manifold for $100 and shipping. Carbs will need cleaning and kits but otherwise good. Just PM if interested.
Similar threads
Thread starter Title Forum Replies Date
Y TR6 SU HS6 question Triumph 1
J TR6 Moss HS6 SU conversion kit question Triumph 4
P BJ7 HS6 Carb Baseline Setting Austin Healey 10
Carlos TR4/4A GROSE-JET or Viton-tip for SU HS6 carbs? Triumph 15
D TR4/4A SU HS6 throttle spindle size Triumph 19
BLong63AH HS6 BJ7 Carb Insulators Austin Healey 5
T TR4/4A HS6 problem Triumph 6
KVH TR4/4A Wish I Could Give Up--My Carbs Still HS6 TR4A Triumph 27
TRMark TR4/4A Convert from H6 and log to HS6 and 4A intake Triumph 6
trotti Calling all SU experts - Volvo HS6 Carbs Austin Healey 11
gbtr6 TR6 SU HS6 carb needle questions Triumph 17
KVH General Tech HS6 SU Carbs Triumph 1
toysrrus TR2/3/3A HS6 Jet Assy Linkage Request Triumph 4
A BJ7 with HS6 SU Carbs - which needles Austin Healey 1
Simmo TR2/3/3A HS6 Carburettors Triumph 4
C TR4/4A Hs6 carb rebuilding Triumph 8
KVH TR4/4A Carburetor Heat Shield for HS6 SUs Triumph 4
G TR4/4A tr4a hs6 carb Triumph 1
H TR4/4A 4A Throttle linkage for HS6 SU Triumph 2
Hap Waldrop SU H6 and HS6 carbs Triumph 9
B TR6 Hitachi HS6 HIF rebuild/TR6 Triumph 1
T SU HS6 tuning - lifting pin question Triumph 11
Lotuswins HS6's on a BJ8 motor Austin Healey 11
H TR6 TR6 HS6 Needle selection Triumph 0
TR4nut TR4/4A TR4A HS6 Factory writeup? Triumph 9
KVH HS6 SU Carbs Triumph 2
K H6 SU carb dome and HS6 carb dome? Triumph 9
T HS6 idle setting Triumph 3
R SU HS6 Carbs overflow leaking........... MG 20
T NLA SU HS6 part request Triumph 10
T Anyone have a spare HS6 pivot bolt Triumph 13
S HS6 Carburetor Austin Healey 16
T One more SU HS6 question Triumph 25
T Float & needle adjustment on SU HS6 - slightly OT Triumph 20
KVH TR4/4A SU-HS6 Carb "Choke" Issue--My TR4A Triumph 8
T TR2/3/3A Will HS6 fit in TR3? Triumph 10
H HS6 Fixed needle centering tips Triumph 1
B Measurements of HS6 Carb MG 12
H TR6 TR6 HS6 Conversion Triumph 6
H HS6 JET identification Triumph 2
H TR6 Volvo HS6 Carbs on a TR6 Triumph 9
H TR6 HS6 for Tr6 -Pics Needed Triumph 1
T TR6 HS6's on a TR6 Triumph 14
chicken is this the correct float for a HS6 carb on a BJ7 Austin Healey 4
rick_ingram HS6 Carb Rebuild Results MG 9
kindofblue TR4/4A Pictures Needed Please - SU HS6 carbs on TR4a Triumph 10
chicken HS6 Carbs for BJ7 Austin Healey 3
eschneider hs6 "414" needles - 2000 rpm idle Triumph 13
J Dual SU HS6 instructions Triumph 4

Similar threads