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This stuff never ceases to amaze me

Posted by Speedracer

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This stuff never ceases to amaze me #1
Speedracer Hap Waldrop Greenville, SC, USA 1967 MG MGB "The Biscuit"	Posted: April 10, 2012 02:41PM Registered: 7 years ago Posts: 20,301

I'm tearing down a set of SU carbs for rebuilding, and you never know what you are going to find, or who's work you will be following. Well here's the float lid inverted showing what the float level was set at, it has Grose jet in it, which is not even remotely close to the size needle valve body that would be correct for HS4 jacking the float way down, so how 3/4" of float level grab you ? cool smiley

Hap Waldrop
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Edited 2 time(s). Last edit at 04/10/2012 02:43PM by Speedracer.

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Re: This stuff never ceases to amaze me #2
dickmoritz Dick Moritz Philly 'burbs, PA, USA	Posted: April 10, 2012 02:43PM Registered: 3 years ago Posts: 7,221

Hap,

Think she was runnin' a little lean? eye popping smiley

Dick

Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

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Re: This stuff never ceases to amaze me #3
Speedracer Hap Waldrop Greenville, SC, USA 1967 MG MGB "The Biscuit"	Posted: April 10, 2012 02:44PM Registered: 7 years ago Posts: 20,301

Actually the customer was complaining of the engine flooding.

Hap Waldrop
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Re: This stuff never ceases to amaze me #4
dickmoritz Dick Moritz Philly 'burbs, PA, USA	Posted: April 10, 2012 02:53PM Registered: 3 years ago Posts: 7,221

In reply to # 2036459 by Speedracer Actually the customer was complaining of the engine flooding.

Another reason not to use Grose-jets...

Dick

Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

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Re: This stuff never ceases to amaze me #5
Beagle Bob Eagleson Nepean, Ontario, Canada 1967 MG MGB GT "Lil Echo"	Posted: April 10, 2012 03:08PM Registered: 2 years ago Posts: 39

Speaking of SU's...

I have a pair of HS6 carbs on a 3/4 race MG motor, what do you 2 experts recommend for fuel pressure?
I have done a fair amount of research on this and the range is 1.5 lbs. - 4.0 lbs. ???
What do you guys recommend ?

Thanks for any advice.
Bob

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Re: This stuff never ceases to amaze me #6
dickmoritz Dick Moritz Philly 'burbs, PA, USA	Posted: April 10, 2012 03:12PM Registered: 3 years ago Posts: 7,221

In reply to # 2036486 by Beagle Speaking of SU's...

I have a pair of HS6 carbs on a 3/4 race MG motor, what do you 2 experts recommend for fuel pressure?
I have done a fair amount of research on this and the range is 1.5 lbs. - 4.0 lbs. ???
What do you guys recommend ?

Thanks for any advice.
Bob

2.5-3 psi...

Dick

Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

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Re: This stuff never ceases to amaze me #7
balloonfoot Lloyd Faust New Mexico, USA 1964 Porsche C Coupe 1967 MG MGB "MAX" 1985 Chevrolet Corvette "EASY 1ST" 1986 Chevrolet Corvette "Gas Mileage Special" 1989 Chevrolet Camaro ""I Rock""	Posted: April 10, 2012 03:31PM Registered: 4 years ago Posts: 8,260

Hap....it is your destiny in life to discover such things.....if you think you were put on this earth just to drive #40....you be smokin' the wrong shit.....

“Better to remain silent and be thought a fool than to speak out and remove all doubt”.
- Abraham Lincoln

"Anyone with an intense emotional interest in a subject loses the ability to observe it objectively: You selectively perceive events. You ignore data and facts that disagree with your main philosophy. Even your memory works to fool you, as you selectively retain what you believe in, and subtly mask any memories that might conflict."

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Re: This stuff never ceases to amaze me #8
underdog Jim Underwood Pittsburgh, USA 1972 MG MGB 1980 Triumph TR8 "Fabulous Trashwagon" 1999 Chevrolet Corvette "Darth Vader" 1999 Chevrolet S10 "Spare Change" 2003 Jaguar S-Type "Eleanor"	Posted: April 10, 2012 04:05PM Registered: 5 years ago Posts: 9,387

One trip to the machine shop, Jerry was showing me what he found in a 1275 he tore down. A square headed stove bolt in place for one of the rod bolts. eye popping smiley

And younz guys think you need ARP stuff. winking smiley

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Re: This stuff never ceases to amaze me #9
ingoldsb Terry Ingoldsby Calgary, Alberta, Canada 1971 MG MGB	Posted: April 10, 2012 05:50PM Registered: 9 years ago Posts: 9,752

I would wager this was intentional. My experience with Grose (gross ?) valves is that they don't seal completely with engine vibration. Some poor sap set this one very low in the hope of preventing flooding. At least, that's my guess.

Terry Ingoldsby
terry.ingoldsby@DCExperts.com

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Re: This stuff never ceases to amaze me #10
mgbanthony Anthony Henderson Gananoque, Ontario, Canada 1962 MG MGB 1962 MG MGB 1970 MG MGB GT 1974 MG MGB 1991 GMC Sierra 1500 → more	Posted: April 10, 2012 05:53PM Registered: 7 years ago Posts: 2,857

Those carbs didn't come from Ontario did they Hap? I sent someone your way recently...and that would be about what you'd get.

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Re: This stuff never ceases to amaze me #11
rocannon Frank L Oklahoma, USA 1980 MG MGB "Restored By Photoshop Inc."	Posted: April 10, 2012 06:11PM Registered: 3 years ago Posts: 2,115

the lower the fuel level in the bowl, the greater the fuel economy... right? winking smiley

Procrastinate... later.

TANSTAAFL !

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Re: This stuff never ceases to amaze me #12
bobmunch Bob Muenchausen PC, Oregon, USA 1968 MG MGB GT "Traveler"	Posted: April 10, 2012 06:14PM Registered: 13 years ago Posts: 11,520

If the Grose Jets were made after about 1996, all bets are off for both performance and even fit.

Not here to promote Grose Jets, but we are far enough along in the history of some of this aftermarket stuff to question whether much of it still justifies its reputation or not. Especially after things have changed hands - sometimes more than once.

And those who were seen dancing were thought to be insane by those who could not hear the music.
Nietzsche

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Re: This stuff never ceases to amaze me #13
Fogliner Mark Vanherd Thornhill,British Columbia, Canada 1974 MG MGB	Posted: April 10, 2012 06:27PM Registered: 2 years ago Posts: 710

Check the wear on the float bowl lid screws.I picture some poor chap having purchased grose jets and then spent the next 2 weeks or months bending the tangs more and more, and pulling more and more hair out the whole while. hot smiley

Then finally changing to a weber carb. confused smiley

But then I always try to imagine the story behind how it got to that point too. drinking smiley

I think I've been watching too many forensics shows. smileys with beer

Have fun guys and gals

Mark

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Re: This stuff never ceases to amaze me #14
jrhickmn James Hickman Sevierville, TN, USA 1958 MG Magnette ZB "Maggie Rose" 1963 MG Magnette MkIV "Iris" 1972 MG MGB GT "Liz" 1977 MG MGB "Sophie"	Posted: April 10, 2012 11:27PM Registered: 5 years ago Posts: 2,503

OH, THERES where i put those carbs i just rebuilt....

(you know there's a dozen newbies on this site reading this thread and asking "whaaa?" winking smiley

Jim H. is a grease-stained wretch, too.

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Re: This stuff never ceases to amaze me #15
MGB567 Barrie Braxton Sunshine Coast, Australia 1966 MG MGB MkI "Money Guzzler"	Posted: April 11, 2012 01:45AM Registered: 2 years ago Posts: 5,292

Because of you miserable wretches spinning smiley sticking its tongue out

I have a new set of grose jets waiting for a cannon - someone mentioned some time ago they were such fodder! Yes I have a pair of viton tipped now!

CKD 11/66 first registered 8/5/67 owned since 3/77. Undergoing nut and bolt restoration. Tartan Red (now). 18GB +40 balanced with almost all new internals. Peter Burgess big valve fast road head. Piper 285. TT exhaust. ARP everywhere. 123 ign. Needham 4synchro c/r box. Stock rebuilt/replaced suspension. Superpro bushes. New brakes all round including all pipes in SS flex. Interior redone. CAMS approved roll bar and side bars. Lots more. Hybrid of o/e and show/fast road car. Not for sale - it's my toy!

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Re: This stuff never ceases to amaze me #16
ANTIQBOB B0B R0SS QUICKSBURG VA, USA	Posted: April 11, 2012 03:32AM Registered: 2 years ago Posts: 2

Hey guys,
I have always wondered if they were any good ... So, needing a set, I ordered a set for my 1275 spridget... And guess what... that 3/4 inch is what you are going to get with the plastic floats shown. I happened to have an extra set of the old style floats with the adjustable metal which worked fine once I adjusted them but I was not able to use the plastic ones with no adjustment. The jets come with a washer and was of no value...

Having changed my floats, the 3/8-1/4 float setting works well...

Certainly there has to be an alternative??? I am of the opinion that they will probably say tough but it might be worth asking people like Moss if there is anything other than replacing the floats??? Of course I guess the Vitron tipped needle and seat for a dollar more will also work without having to do away with the plastic float assys...

Antiqbob

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