Measurements of HS6 Carb

[blkcorvair]

Anyone got an loose HS6 Carb handy that they can take a measurement on? I just need the overall length, from gasket surface to gasket surface. Thanks

 

[bigjones]

Scott,
Here is a rough measurement off my TR3A: 5 9/16"

Cheers,
Adrian

 

[PeterC]

Those are H6s.... and there's a gopher in your engine bay!

 

[bigjones]

Peter,

Wow. You are quite correct, of course. Thanks for pointing that out - hope I didn't cause confusion. What is the difference between H and HS, anyways?

As for the gopher, well spotted. Maybe that is the cause of funny noises I hear under the hood?

Cheers,
Adrian

 

[Hap Waldrop]

Sorry late on the scene, I have one in the shop, I'll look and post later today, if I forget, just call me Scott.

 

[billspohn]

The HS has the flexible hose from floatbowl to jet. It is also a shorter carb, flange to flange, than the H series. If Hap doesn't surface with a measurement, remind me and I'll throw a tape on some I have in the garage.

 

[Hap Waldrop]

4.010"

 

[PeterC]

Peter,

Wow. You are quite correct, of course. Thanks for pointing that out - hope I didn't cause confusion. What is the difference between H and HS, anyways?

As for the gopher, well spotted. Maybe that is the cause of funny noises I hear under the hood?

Cheers,
Adrian

Adrian, LOL The way I know it, and some of this is true knowledge, and some may be interpreted, but:

H means side draught (tho I haven't seen an up or down draught SU) They all have the float bowl attached with a banjo bolt through which the gas flows to the jet

H S have a remote float bowl hung on the carb body and the aforementioned flexible jet tube, (Side bowl, maybe?)

H D is has the float bowl beneath the carb body with a Diaphragm on the jet.

H IF has an Integral Float bowl under the carb, no diaphragm and the jet sits in the bowl.

Bill Murray could help with the gopher, but beware of collateral damage!

Peter

 

[Roger]

FYI, the C-type MG Midget had a downdraught SU, and as far as I know, they were the first to have a return spring in the dashpot. Contemporary sidedraught SUs had heavy pistons, and relied on gravity.
There were some updraught SUs, but I can't remember to what they were fitted, except of course for the famous ones, of different design, on the R-R Merlin!

 

[PeterC]

Thanks Roger. I figured there had to be some.

Oh, I forgot, the number (4, 6, etc) in the case of these carbs, is he number of 1/8s eighths of an inch over 1" of the butterfly bore. So in this case 6 is 6/8 or 3/4" or 1-3/4.

The HIF44 are 44mm or 1-3/4"

Peter

 

[rick_ingram]

Thanks Roger. I figured there had to be some.

Oh, I forgot, the number (4, 6, etc) in the case of these carbs, is he number of 1/8s eighths of an inch over 1" of the butterfly bore. So in this case 6 is 6/8 or 3/4" or 1-3/4.

The HIF44 are 44mm or 1-3/4"

Peter

Cool bit of trivia!

And...the HIF44 (now being touted by Moss and Vicky Brit as a bolt on replacement for the ZS175 for the RB MGB) is very similar to the HIF6 that I used on my 1978 MGB back in 1992.

 

[PeterC]

Cool bit of trivia!

And...the HIF44 (now being touted by Moss and Vicky Brit as a bolt on replacement for the ZS175 for the RB MGB) is very similar to the HIF6 that I used on my 1978 MGB back in 1992.

and a ZS175 = 1.75" and a ZS150 = 1.50"

In case you didn't know.

Peter

 

[rick_ingram]

Cool bit of trivia!

And...the HIF44 (now being touted by Moss and Vicky Brit as a bolt on replacement for the ZS175 for the RB MGB) is very similar to the HIF6 that I used on my 1978 MGB back in 1992.

and a ZS175 = 1.75" and a ZS150 = 1.50"

In case you didn't know.

Peter

Actually, I did know that one!

:wink: