39 replies to this topic

[mattyglover16]

Hi, Just wondering if to get a duplex timing chain kit for my 1293cc build or just the single one ? any suggestions 

 

Thanks

[Fast Ivan]

Duplex

[mattyglover16]

Thanks

[Stiggytoo]

You may need to modify your timing cover. No biggy.

[mattyglover16]

.

Edited by mattyglover16, 08 September 2015 - 06:55 PM.

[mattyglover16]

You may need to modify your timing cover. No biggy.

It's a 1275 1994 A+ engine. What modicatitions have to be done ? Or can you buy the modified part ? Thanks

[Matt's Dad]

Forget a cheap duplex. From my experience going back to the 80's they're no better than a simplex. The single IWIS chain that Keith Calver (amongst others) sells is far superior to most and will handle pretty much as much valve train load as you can put into it.

On an A+ if you use the IWIS chain, use a new tensioner pad and adjust it so that it just kisses the chain, it doesn't need loading up. The IWIS chain doesn't need modification to the timing cover.

[gazza82]

Bought one of the Minispares EVO chains recently which is an IWIS product ... so saved money!

Edited by gazza82, 08 September 2015 - 07:59 PM.

[Spider]

Duplex every time, but as mentioned, don't fit a cheap chain. Most sprocket sets I've come across have been OK, but there's some cheap rubbish chains about.

 

To fit a Duplex, there's two screws you need to replace with countersunk ones, they are behind the crank sprocket. You may - not always - need to knock out a bump that maybe in your timing cover, not all covers have it. I have a photo, I'll post up later.

[mattyglover16]

Duplex every time, but as mentioned, don't fit a cheap chain. Most sprocket sets I've come across have been OK, but there's some cheap rubbish chains about.
 
To fit a Duplex, there's two screws you need to replace with countersunk ones, they are behind the crank sprocket. You may - not always - need to knock out a bump that maybe in your timing cover, not all covers have it. I have a photo, I'll post up later.

Okay doesn't seem too complicated then. Would appreciate it if you could upload the picture as it would help me loads. Thank you!

[mattyglover16]

Would you reckon this would be ideal ?

http://www.minispare...12.aspx|Back to

[Matt's Dad]

It'll do the job, but really, unless the engine is very 'hot', you don't need any more than the single Minispares 3H2127EVO as mentioned by gazza82 above.

If you have an extremely high revving engine with very heavy valve train load the Swiftune vernier duplex set (which also uses an IWIS chain) is probably the ultimate.

[mattyglover16]

I see what you mean but most people say just upgrade to the duplex one when tuning the engine. Mini Spares recommend it too but thanks for the help and idea really appreciate it

[gazza82]

Just to clarify that EVO chain I bought is a duplex

[mattyglover16]

Just to clarify that EVO chain I bought is a duplex

 

 

Which kit did you buy off Mini Spares? then did you buy the chain separate ?