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Help with newly acquired 72 350 Auto


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Grahamred70

Club Member

Sun 21 Oct 18 11:17


Looks quite tidy there under the bonnet, is it a recent import or has it been here for a while? I rebuilt my carb only to find that the problem was a mismatch between the carb and manifold resulting in a vacuum leak so shiny new carb and problem solved.
Graham


--------------------
Graham, red 1970 convertible 350

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Jimbo64

Club Member

Sat 27 Oct 18 20:55


Graham - she's a new import from Florida. Now back from a wee break, so hopefully going to get cracking on her and fault find the fuelling problem and tidy up a few other issues found once I got her home, luckily all appear to be mainly cosmetic & require some tlc.


--------------------
Happy to be Grumpy

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Jimbo64

Club Member

Sat 03 Nov 18 22:25

Re: Help with newly acquired 72 350 Auto


Whilst replacing and then checking the gear selector bulbs' connection on the underside of the front console unit, thought I'd still had the battery disconnected, but clearly hadn't and duly blew the 5 amp fuse for Instrument Lamps.
The fuse is really small (10mm) and trawling through ebay etc, couldn't see anything similar. Corvette America & Rock Auto sell them, in either kits or singularly, but as I had an order about to be dispatched from Corvette Kingdom, got in touch and was advised there was a 5amp fuse in the emergency kit they sell. Asked about it's size and told it was smaller than the others in the kit.
Sadly on receiving same and checking it against mine and a quick attempt to fit it into the fuse space, confirmed It's not gonna fit, as it's 15mm and not what I need. So a bit of a waste of my time and money, as I already have plenty of the other glass fuses in kit and fuse pullers and only required this specific fuse.
Suffice to say, is there anyone on here who has or knows where I can purchase, ideally in UK, these 10mm long 5 amp fuses for the Inst Lps position In fuse box?
Many thanks,
James Gill


--------------------
Happy to be Grumpy

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vet80y

CCCUK Supporting Vendor

Sun 04 Nov 18 10:02

Re: Help with newly acquired 72 350 Auto


Im sorry the fuse you needed wasn't in that kit. Those title fuses are very hard to get and are only available as part of the fuse/flasher kit:

https://www.corvettekingdom.co.uk/part/71-73-fuse-flasher-ki...

I am pretty sure I have a couple of these separately, I'll get Chris to post one out to you tomorrow.

Scott, CK

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Jimbo64

Club Member

Sun 04 Nov 18 12:06

Re: Help with newly acquired 72 350 Auto


Scott,
That's very much appreciated.
James Gill


--------------------
Happy to be Grumpy

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Jimbo64

Club Member

Tue 06 Nov 18 19:34

Re: Help with newly acquired 72 350 Auto


Well I wish I was compiling a positive narrative about my car, but sadly, no, things are just getting worse.

Took off the Rochester carb today and began the rebuild with the kit supplied by Corvette Kingdom (many thanks guys)

All was initially looking good, when it all came apart and all the required bits in the kit re-fitted where the old bits came out etc.

Unfortunately, when it came to the choke side, this is where it has all gone so wrong.

When I looked at how this was all connected on my photos, both pre-removal from car and on my table before disassembly, it is quite obvious that this set-up is totally different from what is shown in Haynes manual, exploded diagram with kit and on any number of videos I have now watched and studied online. And it appears to me and certainly when I tried to manually move it all, this set-up does not allow the secondaries plate to move at all. There certainly seems to be a "new-ish" Choke vacuum break assembly installed at some time, but incorrectly in my opinion.

I am naturally looking for some assistance/advice (AGAIN ! so sorry!) and even more so as to how to upload photos onto this thread, which would make the above a lot easier for any carb gurus out there.

I'm going onto the Add an Attachment section, Choose File and then going into my photos on my pc, selecting and then the image info appears alongside the Choose File box, not in the empty box below and the Add Attachment box never gets bold and if I do click on it, I just get an error message in red up top.

Thanks,

Jim "not loving the American Dream yet!" Gill


--------------------
Happy to be Grumpy

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roscobbc

Committee Member

Tue 06 Nov 18 23:03

Re: Help with newly acquired 72 350 Auto


Secondaries I believe are 'locked out' unless there is a vacuum signal from primary side of carb - prevents 'bogging' if you floor the gas at low rpm.


--------------------
CCCUK Chairman
'68 coupe - 4 speed - 3.08 - 489 cu in - 570 bhp @ 5850 rpm - 606 ft/lbs torque (821 Newton Metres) @ 3850 rpm
Image

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Vetteheadtony

Club Member

Wed 07 Nov 18 02:06

Re: Help with newly acquired 72 350 Auto


For the secondary’s to open the choke flap must be open and move the weight looking thing behind the choke mechanism and the secondary’s should open on full throttle.


--------------------
Vetteheadtony
2004 Z06 lemans edition pro charged
613 BHP
Black C6 ZR1 wheels
FECKING FAST!!!

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Vetteheadtony

Club Member

Wed 07 Nov 18 02:12

Re: Help with newly acquired 72 350 Auto


Vetteheadtony wrote (View Post):For the secondary’s to open the choke flap must be open and move the weight looking thing behind the choke mechanism and the secondary’s should open on full throttle.
https://youtu.be/_mwX06-3LV8

Check this last night out!


--------------------
Vetteheadtony
2004 Z06 lemans edition pro charged
613 BHP
Black C6 ZR1 wheels
FECKING FAST!!!

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Jimbo64

Club Member

Wed 07 Nov 18 07:17

Re: Help with newly acquired 72 350 Auto


Cheers guys, understand your comments and the video, the latter which confirms that my choke & secondary set up is completely incorrect and would not allow secondary operation in any circumstance.
My Morris V8 has been running great for a good few years now with an Edelbrock and I'm 99% convinced I'm going to go the same way with my Vette now, especially when I compare prices for a rebuilt Rochester v new Edelbrock, the latter which I know and trust to work.
Obviously a little bit of work required to "swap" from the former to the latter, but it's all about me having a car that firstly has to run! & then secondly, I then have confidence and a better understanding/previous knowledge of components on same and I don't have to do what I've done these last few days/weeks i.e. have a lovely looking big red ornament to look at in my new garage !


--------------------
Happy to be Grumpy

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