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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 27 Jun 2011 :  11:55:42 Show Profile Reply with Quote
Does anyone know the correct jet sizes for a 27mm choke 34ich on a 1500 V4?

This info used to be on the much missed Performance96 website! Does anyone have a copy of the jetting table from there?

--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"

n/a
deleted

60 Posts

Posted - 27 Jun 2011 :  13:52:26 Show Profile Reply with Quote
I printed a copy in 2009

Main jet 155
Idle jet 50
Emulsion tube F6
Air corrector 175
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n/a
deleted

60 Posts

Posted - 27 Jun 2011 :  13:58:44 Show Profile Reply with Quote
sorry pressed the wrong key - to continue

Accelerator pump jet 40
And I'm using a 175 neddle valve

Tried this setup at the weekend, acceleration was so much better. Some fine tuning required to the linkage system and a cheap air filter didn't help. Also need to check ignition advance. Getting there slowly.
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 27 Jun 2011 :  16:39:28 Show Profile Reply with Quote
Many thanks for the info! Just what I needed!

8)



--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 29 Jun 2011 :  10:49:34 Show Profile Reply with Quote
Repair kit arrived in the post yesterday (Tuesday). Not bad, seeing as I only ordered it late on Sunday! Well done Fast Road Cars!

I've splashed out (groan!) on a small ultrasonic cleaner. Its not big enough to take the complete carb, but should hold the dis-assembled bits. Hope to start work on it on Friday, will let you know how I get on....!

--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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john-saab
Administrator

United Kingdom
2647 Posts

Posted - 29 Jun 2011 :  15:08:16 Show Profile Reply with Quote
I re-built my spare one today (kit ordered yesterday afternoon and arrived this morning..Fast Road cars again!)and found an internal spring missing and the wrong idle air jet..that could explain why I couldn't get it to idle!

current V4 models..'72 95 (The Flying Banana),'72 96 (Bridget),'74 95 (Veronica),'74 96 (The Brown one)NOW SOLD..destined for greater things

Edited by - john-saab on 29 Jun 2011 15:09:10
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 29 Jun 2011 :  16:23:31 Show Profile Reply with Quote
Looking at the exploded diagram that came with mine, it looks as if the pushrod that links the choke to the throttle link (presumably for fast idle under choke) is missing! I wondered what that floppy link on the throttle link was for!

Hope I can find an old coathanger to fabricate another one....!



--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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Derek
V4 Guru

United Kingdom
1778 Posts

Posted - 29 Jun 2011 :  19:25:34 Show Profile Reply with Quote
I've just looked at a 28/36 I have and that doesn't have a rod at all. The choke cable works a richening valve on the side of the carb body but there aren't any choke butterflies like the Ford and Weber ICH.
This pdf might be useful
http://foxed.ca/rx7manual/manuals/36dcd%20manual.PDF
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john-saab
Administrator

United Kingdom
2647 Posts

Posted - 29 Jun 2011 :  19:48:08 Show Profile Reply with Quote
Peter..a coat hanger will be way too thick. It would be worth asking Anthony at FRC..he might have one as these are a common carb (larger 29's fitted to Land Rovers)..if not a standard fomoco carb may yield a rod!
I dropped other work today so that I could fit mine..for the 1st time ever it idles at 800rpm without a hic-cup. I had do an emergency stop and she still ticked over at the perfect speed. The car drives so differently..even the temperature stayed steady. I had smooth driving in traffic..that's also a 1st!

current V4 models..'72 95 (The Flying Banana),'72 96 (Bridget),'74 95 (Veronica),'74 96 (The Brown one)NOW SOLD..destined for greater things
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Derek
V4 Guru

United Kingdom
1778 Posts

Posted - 29 Jun 2011 :  23:39:47 Show Profile Reply with Quote
Whoops, I was sure we were talking about a 28/36 Oh, that's the other thread...
Which carb is your preferred option or is it 28/36 on the 96 and ICH on the 95?
ICH rod mics up at about 0.115". Meaured on a 25 and a 29 so I'd think the 27 is the same. Check a few hooks on the top of plastic coat hangers. I found a couple at about 0.118" which should be close enough.

Edited by - Derek on 29 Jun 2011 23:43:23
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 30 Jun 2011 :  09:24:40 Show Profile Reply with Quote
Hi Derek,

Yes, the 28/36 is on my 96 and is the one with the vacuum leak. As you rightly say, it has no link to increase the tickover when on the "choke" - which is a shame, 'coz it would benefit enormously from that!

The 34 ich is going on my 95 when I've overhauled it. As far as I can tell from an external examination, the only thing missing is the fast idle rod from the choke. I'm sure I will have something in my shed with which to fabricate one. A coathanger was just the first thing that came to mind!

Bodgers of the world unite!

--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 01 Jul 2011 :  18:38:05 Show Profile Reply with Quote
Today I've overhauled the 34ich. I knew when I bought it that it hadn't been used for many years, so I wasn't surprised when I opened it up and found it full of crud! At sometime in its history, the inlet filter had split, and the whole fuel bowl was full of rusty sediment.

I had hoped to picture the rebuild, but because of the amount of debris inside, it took longer than I expected! Anyway, a combination of Carb Cleaner, cellulose thinners, wire and nylon brushes and the ultrasonic cleaner got rid of all the crud (I hope!), and the carb is now back together!

Unlike the DCD, the ich appears to have proper seals on the spindle to prevent air leaks. New ones were provided in the overhaul kit, so hopefully I won't have any problems there! All the jets looked the right size except one, which read 47 when I was expecting 50. I *think* this is the idle jet (not too familiar with the ich!), so I should be able to compensate with the needle adjustment. Its the only one externally accessible anyway, so I won't have to dismantle the whole carb if its wrong!

In one of my earlier posts, I mentioned that the pushrod for the fast idle under choke was missing. On closer study, the holes looked a familiar size, and a quick trial fit with a 3mm bolt confirmed my suspicions - they are 3mm holes!

Now by one of those unlikely coincidences so beloved of Douglas Adams, my other hobby is building RC helicopters:



Now the flybar on my smaller machines just happens to be 3mm! (The flybar is the thing on the rotorhead, at right angles to the main blades, that carries a pair of small stabiliser paddles).

Rummaging through my junk box soon provided a bent flybar - no longer airworthy, but perfectly capable of providing a stiff pushrod! A quick dab with the hacksaw and a 3mm die, and we now have:



TaDa! A perfect fast-idle pushrod for a 34 ich!



However, I can't fit it and try it just yet! My 28/36dcd off my 96 is currently away having the spindles sleeved to fix an air leak! So until I get the carb re-installed on the 96, the 95 will have to wait! I can't afford to have both cars immobile at the same time.....!

BTw - those of you of a "certain age" may recognise the helicopter on which my model was based! A packet of peanuts for the first to correctly identify it!





--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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john-saab
Administrator

United Kingdom
2647 Posts

Posted - 01 Jul 2011 :  18:44:31 Show Profile Reply with Quote
Peter..that looks a great bodge..the rod on mine isn't straight..it also has a bit of tension when fitted..I will get pics tomorrow.
I may not be old enough for the 1st showings but i remember repeats in the 70's of....



current V4 models..'72 95 (The Flying Banana),'72 96 (Bridget),'74 95 (Veronica),'74 96 (The Brown one)NOW SOLD..destined for greater things
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Derek
V4 Guru

United Kingdom
1778 Posts

Posted - 01 Jul 2011 :  18:45:04 Show Profile Reply with Quote
Bell 47 ?

You might have to put a bit of a bend in to set the fast idle correctly.

Edited by - Derek on 01 Jul 2011 18:49:17
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john-saab
Administrator

United Kingdom
2647 Posts

Posted - 01 Jul 2011 :  19:21:22 Show Profile Reply with Quote
quote:
Originally posted by Derek
Bell 47 ?


47G and a 47J Ranger

current V4 models..'72 95 (The Flying Banana),'72 96 (Bridget),'74 95 (Veronica),'74 96 (The Brown one)NOW SOLD..destined for greater things
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pchristy
V4 Guru

United Kingdom
1737 Posts

Posted - 01 Jul 2011 :  23:40:31 Show Profile Reply with Quote
quote:
Originally posted by john-saab
Peter..that looks a great bodge..the rod on mine isn't straight..it also has a bit of tension when fitted..I will get pics tomorrow.
I may not be old enough for the 1st showings but i remember repeats in the 70's of....



Congratulations! You have won today's star prize!

It is indeed a replica of N975B, the original Bell 47g used in "Whirlybirds"!



And well done Derek - a close second!

I'm actually quite proud of that model, as it took second place at both the Scottish and British National Championships last year. Alas, its currently awaiting major surgery following a mechanical failure in flight earlier this year! However, fear not! I now have all the bits necessary for reconstruction, and she will fly again - once I've sorted my carbs out!





--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"

Edited by - pchristy on 01 Jul 2011 23:46:24
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