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preheater troubles



 
 
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  #51  
Old December 12th 11, 11:59 PM posted to rec.autos.makers.vw.aircooled
tricky[_2_]
external usenet poster
 
Posts: 50
Default preheater troubles



On 12/12/11 17:08, John J Stafford wrote:
> In article<iPWdndAAJZW6vHzTnZ2dnUVZ5tCdnZ2d@giganews. com>,
> David > wrote:
>
>> On 12/08/2011 12:13 PM, David Gravereaux wrote:
>>> 2) A pair of Weber ICH carbs and the CB performance 3083 kit
>>> http://www.webercarbsdirect.com/34_ICH_p/15290.027.htm
>>> http://www.cbperformance.com/catalog.asp?ProductID=539
>>>

>>
>>
>> Done. Money spent.<sigh> At least I'll have some boxes to wrap for
>> under the tree.. To: Dave From: Santa

>
> You will be blown away by the performance. Take care, however. You CAN
> over-rev a dual carb ACVW! (For the rest - you with single carbs have a
> restrictor - the carb itself.)


If you think this might be a problem, you can get rev limiting rotor arms
Ads
  #52  
Old December 13th 11, 12:23 AM posted to rec.autos.makers.vw.aircooled
P.J.Berg[_8_]
external usenet poster
 
Posts: 20
Default preheater troubles

On Mon, 12 Dec 2011 23:59:38 +0100, tricky
> wrote:

>
>
> On 12/12/11 17:08, John J Stafford wrote:
>> In article<iPWdndAAJZW6vHzTnZ2dnUVZ5tCdnZ2d@giganews. com>,
>> David > wrote:
>>
>>> On 12/08/2011 12:13 PM, David Gravereaux wrote:
>>>> 2) A pair of Weber ICH carbs and the CB performance 3083 kit
>>>> http://www.webercarbsdirect.com/34_ICH_p/15290.027.htm
>>>> http://www.cbperformance.com/catalog.asp?ProductID=539
>>>>
>>>
>>>
>>> Done. Money spent.<sigh> At least I'll have some boxes to wrap for
>>> under the tree.. To: Dave From: Santa

>>
>> You will be blown away by the performance. Take care, however. You CAN
>> over-rev a dual carb ACVW! (For the rest - you with single carbs have a
>> restrictor - the carb itself.)

>
> If you think this might be a problem, you can get rev limiting rotor arms


If the engine has the original valve springs or others with the same
spring rate the valves will float before you do any damage.

J.
--
P.J.Berg

--- Posted via news://freenews.netfront.net/ - Complaints to ---
  #53  
Old December 13th 11, 04:18 PM posted to rec.autos.makers.vw.aircooled
John J Stafford[_2_]
external usenet poster
 
Posts: 25
Default preheater troubles

In article >,
tricky > wrote:

> > You will be blown away by the performance. Take care, however. You CAN
> > over-rev a dual carb ACVW! (For the rest - you with single carbs have a
> > restrictor - the carb itself.)

>
> If you think this might be a problem, you can get rev limiting rotor arms


Got one and it does not work. Fortunately my engine is so well balanced
that it soars to 8,000 RPM with no damage. I've had it to 9,000. The rev
limiting rotor was set to 7,000. Not working.
  #54  
Old December 13th 11, 04:20 PM posted to rec.autos.makers.vw.aircooled
John J Stafford[_2_]
external usenet poster
 
Posts: 25
Default preheater troubles

In article >,
"P.J.Berg" > wrote:

> On Mon, 12 Dec 2011 23:59:38 +0100, tricky
> > wrote:


> > If you think this might be a problem, you can get rev limiting rotor arms

>
> If the engine has the original valve springs or others with the same
> spring rate the valves will float before you do any damage.


Heavy duty double springs and zero-lash roller-rockers. This engine is
really built. Too bad it has a very serious backfire. It's too darn cold
to work on it now.
  #55  
Old December 13th 11, 07:49 PM posted to rec.autos.makers.vw.aircooled
davygrvy
external usenet poster
 
Posts: 15
Default preheater troubles

On Dec 12, 9:06*am, John J Stafford > wrote:
> In article >,
> *David Gravereaux > wrote:
>
> > > Agreed! *I'm thinking the redline K1411 kit with the Weber ICT carbs
> > > (but with manual choke)

>
> In my Weber duals there is a disabled enriching circuit for the choke. I
> have read where sometimes an activation cylinder moves causing it to
> constantly flood. Anywho, those chokes are in there. Maybe you can get
> just the activating parts.


The IDF enrichment circuit is a bit different than the ICH which uses
a real choke flap. Interesting story with IDFs... In my 2270cc T4
motor with dual 44-IDFs, I didn't have the enrichment mechanicals,
just the block-off plate. Just two days on the motor, I did a 7000
rpm downshift into second gear coming off a highway exit ramp. I
think that's what pulled the enrichment cylinder and wedged one in the
up (open) position. It drove me nutts for a week trying to solve why
the motor was running all unbalanced.

summary: blocking plates bad. Get the IDF choke mechanicals if only
to make sure the enrichment "cylinders" don't get pulled up and wedged
open on you.
  #56  
Old December 14th 11, 06:11 PM posted to rec.autos.makers.vw.aircooled
John J Stafford[_2_]
external usenet poster
 
Posts: 25
Default preheater troubles

In article
>,
davygrvy > wrote:

> The IDF enrichment circuit is a bit different than the ICH which uses
> a real choke flap. Interesting story with IDFs... In my 2270cc T4
> motor with dual 44-IDFs, I didn't have the enrichment mechanicals,
> just the block-off plate. Just two days on the motor, I did a 7000
> rpm downshift into second gear coming off a highway exit ramp. I
> think that's what pulled the enrichment cylinder and wedged one in the
> up (open) position. It drove me nutts for a week trying to solve why
> the motor was running all unbalanced.
>
> summary: blocking plates bad. Get the IDF choke mechanicals if only
> to make sure the enrichment "cylinders" don't get pulled up and wedged
> open on you.


One of mine is partly up! So that's the wrong direction. I think I'll
pull it down and pin it in place. Wow, it would be awesome if that were
the only problem!
 




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