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turbominivanman

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OK Guys.

Done loads of searching and I think I have some of the answers but I need some help please.

I've got a buyer for my SC K1200RS twin cam head kit and exhaust but I've been asked to supply a pair of used pulleys.

Forget the expensive vernier Kent and Piper jobs, they're just too much money.

I'm trying to ascertain what standard OEM pulleys will work - presumably Ford.

I know each pulley needs 38 teeth (as per the SC conversion) and was under the impression that Ford SOHC Pinto pulleys were suitable.

However, there are a pair of Cosworth YB STD DOHC pulleys for sale on a 'Buy it Now' price on Fleebay for £20 and if suitable would fit the bill perfectly. Here's the link :

http://cgi.ebay.co.uk/Ford-Cosworth-YB-STD...=item20b12e5272.

Can anyone advise which car, engine, CC etc I could use the pulleys from or indeed if the above Cossie pulleys would be suitable.

Many thanks.

Richard.


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Brett

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i think alot use honda pullys. The ones in the pic look like the supra ones i have a home ill dig them out and look over them if there any good to you you can have them for postage im not getting another supra in a while if at all

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Jimster
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I use the honda b16 pulleys, no problems in the 4 years of running them

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Brett

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sorry Richard mine are mahoosive and 48 teeth :/

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John

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turbominivanman

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Thanks Guys.

Keep it coming.

I need to know what Ford pulleys can be used.

The ones in my pic above are Cosworth YB STD pulleys.

Cheers.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
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turbominivanman

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On 15th Jun, 2010 Jimster said:
I use the honda b16 pulleys, no problems in the 4 years of running them

Jim.

Cheers mate.

Do you use the 'standard' 19 tooth bottom crank pulley as supplied in the SC kit with your B16 cam pulley wheels or one which has a different number of teeth ?

I think the SC crank pulley has 19 teeth, I could be wrong.

Cheers.

Richard.

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Rod S

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Richard,

I have a pair of Cosie vernier pulleys which I have not yet got around to fitting.

They are 38 teeth.

If you want me to take any other key measurements, let me know.

I thought I had a set of standard used ones (came in a box of assorted bits) which you could have had for free (just postage), but it looks like I threw them when I got the verniers....

EDIT - no I haven't thrown them, well not if my "database" is right, but they are in a box right at the bottom of a large stack.

I'll dig them out if you want but I'd rather take a few measurements off the vernier ones first to see if the used ones are of any use to you.

Edited by Rod S on 15th Jun, 2010.

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Sprocket

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Square or round tooth profile?

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Rod S

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On 15th Jun, 2010 Sprocket said:
Square or round tooth profile?


Not sure if that was directed at me or not Sprocket, but the Cossie pulleys I have sitting next to me are square at the top, round at the bottom.

How relevant that is to the BMW conversion, I haven't a clue *happy*

But if Richard wants measurements off a Cossie pully, as he suggested earlier, I can do it :)

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Sprocket

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Sorry Rod, It was not directed at you, it was meant to be in general:)

Specialist components sold/ sell kits with square tooth profile, as well as round. One will not work with the other :)

Edited by Sprocket on 15th Jun, 2010.

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Rod S

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No problem :)

On 15th Jun, 2010 Sprocket said:
Specialist components sold/ sell kits with square tooth profile, as well as round. One will not work with the other :)


I wasn't aware of them offering both square and round profiles but then I'm not following the BMW route. *happy*

Even the "round" profile seems to have two different industry standards, at least within Ford, as I found to my cost, 16 bent valves..... *frown*

Schrödinger's cat - so which one am I ???


turbominivanman

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Sprocket.

If I check the SC crank and cam/jackshaft pulleys for their teeth profile I have in my kit, this will tell me what tooth profile I need on the cam pulleys shouldn't it ?

Rod.

I'd like to take you up on the used pulleys please but as you suggest, we'll check a few measurements first and make sure the tooth profile is the right one.

Could you measure A) the total outer diameter, tip of tooth to tip of tooth for me please Rod.

Also, B) the small inner diameter of the shaftway bore where the keyway is, along with C) the keyway width and D) keyway height.

Lastly, E) the depth of the inner bore, face to face and F) how much each pulley small inner mounting hub protrudes from the back face of the pulley.

Many thanks.

All being well, if the dimensions suit the SC cam drive adapters I have in the kit and the tooth profile is correct, then I'd welcome taking yours off your hands if they're in that box (I'll pay for the pulleys Rod, no probs, and the P&P) or I'll buy the Cosie pulleys off fleebay as shown above.

Cheers chaps.

Hopefully, these would be a cheaper alternative than very expensive vernier pulleys, given that if they're ok, they could be used with offset keys to obtain the correct camshaft timing if required.

Richard.

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turbominivanman

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On 15th Jun, 2010 John said:
http://cgi.ebay.co.uk/HONDA-INTEGRA-DC2-DOHC-B16-B18-VTi-VERNIER-PULLEY-SET-/270540716191

John, I dont think I can use these buddy as they only have 34 teeth.

Jimster or Sprocket : I take it the Honda B16 have 38 teeth ?

Richard.

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Rod S

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(a) OD, 113.5
(b) shaft size 24.0
( c) keyway width 5.0
(d) keyway depth ~2.2 (very difficult to measure accurately on the pulley)
(e) boss depth/thickness 22.3
(f) it doesn't, it protrudes from the front by ~3.5

The only thing you didn't ask for is pulley/belt width 27.0



Hope that helps, I can't imagine the Cossie ones are right or why are most people using Honda ??? The Cossies are much more readily available.

But you're welcome to my old standard ones if the measurements do make sense.....

EDIT - last point, it's pulley width 27.0, belt is 25.4 (ie old 1").

And here's how to bend all sixteen valves...



strip a few teeth off and the belt picks up drive again for at least 4 engine revolutions about 360 degrees out....

Edited by Rod S on 15th Jun, 2010.

Schrödinger's cat - so which one am I ???


apbellamy

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Sprocket

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Yes looking at the jackshaft and crank pullies you will be able to see which profile square or round

On 15th Jun, 2010 turbominivanman said:

Jimster or Sprocket : I take it the Honda B16 have 38 teeth ?

Richard.



IIRC they have 36 teeth and are a smaller diameter. They are round tooth profile. I had to source from the US to get the 38 tooth Honda pulley from the American 2.5 SOHC, but there may be other options that I have not come across.

Rod. Yes, there are many tooth profiles that look similar. Ford used a veriety. Some of the earlier stuff used a HTD8 or HTD9.525 profile, I am not sure which, while on their Zetec engines they used the HTDA9.525 profile. The same profile that I use, as I based my DIY conversion around the Fiesta 1.25 pullies

The belt is the same length and IIRC both profiles were used on Volvo's.

As for exact pulley measurements, I cannot help, But I do know that the center bore and key way of the honda pullies are different. Nothing to stop some one making new cam adapters, but then that in itself incurs a cost

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


turbominivanman

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On 15th Jun, 2010 apbellamy said:
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=367983&lastpost=1

Cheers Andy mate, but again, the Honda cam pulleys in this for sale post only have 34 teeth and the SC kit uses pulleys with 38 teeth to go with their bottom SC crank wheel, which I have.

So, I'm restricted to 38 tooth cam wheels.

Richard.

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Sprocket

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Ah thats right, the Honda B series are 34 not 36 :)

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


turbominivanman

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Many thanks Rod & Sprocket.

I'll go check the crank and jackshaft wheel tooth profiles and by elimination, this will allow a decision on whether the Cossie YB cam pulleys are ok to use.

Cheers.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
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turbominivanman

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Right Rod.

The two pulleys in my SC kit are square tooth top profile and square tooth trough profile.

The 'Gates' belt supplied by SC has a square profile tooth pattern to match the jackshaft and crank pulley wheels.

Rod, I've also checked the dimensions you supplied (VMT) and these look perfectly ok with the kit I've got.

If you wouldn't mind checking your old 38 tooth Cossie pulleys, if they are square tooth profile I'd like them please Rod if they're still available.

I'll send you a PM. Happy to send some dosh for them, plus postage.

Many thanks for your help.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
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Sprocket

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Kent cams CA11

Piper Cams PULDOHC

Ford 1.6, 1.8, 2.0 'Pinto'

IIRC

Edited by Sprocket on 18th Jun, 2010.

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


turbominivanman

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On 18th Jun, 2010 Sprocket said:
Kent cams CA11

Piper Cams PULDOHC

Ford 1.6, 1.8, 2.0 'Pinto'

IIRC

Cheers Sprocket.

That certainly opens it up a bit better !

Richard

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Rod S

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On 18th Jun, 2010 turbominivanman said:
Right Rod.

The two pulleys in my SC kit are square tooth top profile and square tooth trough profile.

The 'Gates' belt supplied by SC has a square profile tooth pattern to match the jackshaft and crank pulley wheels.

Rod, I've also checked the dimensions you supplied (VMT) and these look perfectly ok with the kit I've got.

If you wouldn't mind checking your old 38 tooth Cossie pulleys, if they are square tooth profile I'd like them please Rod if they're still available.

I'll send you a PM. Happy to send some dosh for them, plus postage.

Many thanks for your help.

Richard.


Richard,

You have me a bit confused, the Cossie ones are as in my photo, round at the buttom of the pulley and square at the top.

ie, the belt is square but with rounded teeth.

Are you sure this is what you want from your description of square/square ???

Schrödinger's cat - so which one am I ???


turbominivanman

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On 18th Jun, 2010 Rod S said:
Richard,

You have me a bit confused, the Cossie ones are as in my photo, round at the buttom of the pulley and square at the top.

ie, the belt is square but with rounded teeth.

Are you sure this is what you want from your description of square/square ???

Yeah, sorry Rod, just realised my mistake, thanks.

The Cossie pulleys ones will not work as the trough profile is rounded and requires a rounded tooth belt.

I think I'm with Sprocket on this, the pulleys I need have the square teeth and use a belt with square teeth.

As the Pinto 1.6, 1.8 & 2.0 engines are very commonplace, I'll source a pair of pulleys from my local scrappy rather than buy Kent or Piper new ones.

Cheers.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
http://www.youtube.com/profile?user=minimadmotorman#p/u

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