Tuning Cinq 899cc bob

[Razman]

Hey,

Does the 899cc bob need modification to accomadate the crankcase breather hose? (My car is a sporting)

Thanks in advance

 

[fingers99]

Yes. An air line fitting is probably the neatest solution.

 

[Razman]

Cheers mate, where would i get one of these thatd fit?

 

[fingers99]

Take the bob and the breather hose to anywhere that sells compressors (Machine Mart is worth a go, but a more specialised place will have a wider range of bits).

 

[Razman]

What about breather filters?

 

[Eklipze3k]

I got one off ebay. Partially bored a hole in the bob (it's very soft plastic) with a knife so that it was slightly smaller than the thread of the fitting, then just twisted it in. A little sealant on the inside and bob's your uncle.

Can't remember the exact sizes off the top of my head, think it's a 16mm barb and 5/8" thread but don't quote me on that The car is elsewhere at the moment so can't measure it.

 

[Eklipze3k]

What about breather filters?

Won't pass an MOT, not allowed to vent to atmosphere.

 

[Razman]

Won't pass an MOT, not allowed to vent to atmosphere.

Ahh okay good to know ill get it all sorted

I cant seem to get the 899 bob onto the tb? It doesnt fit over the rubber seal, i thought it was a straight swap?

 

[Eklipze3k]

2 options - turn the rubber seal upside down, or cut the thinner section off so that it sits flat.

 

[Razman]

Okay mate, thanks a bunch

 

[blu73]

or if lazy like me just tighten it down onto the seal as is - seals fine on my car

 

[Eklipze3k]

or if lazy like me just tighten it down onto the seal as is - seals fine on my car

I'm sure yours is upside down isn't it?

 

[blu73]

no, normal way up with the thinner bit at top

 

[Razman]

I dont have any bolts for the bob, what size are they?

 

[fingers99]

I can't remember -- but they're pretty long, I think.

See if you can find some in a scrappy?

 

[Razman]

Ill have a look, i know a guy that only breaks cinqs and seis (one a week) he might have a couple. Ive been looking at the silicone pipe to connect the bob to the cone and it looks like ill need at least 4 pieces! But ive seen member on here with a single pipe?

 

[Eklipze3k]

The single piece ones you've seen are most likely GSR, custom made to fit exactly and expensive.
Mine is 4 pieces: reducer 45-50mm -> Short straight 50mm ALU pipe (around 10cm length) -> 50-76mm reducer elbow -> 76mm straight ALU pipe (again around 10cm) -> Cone

As for the bolts to hold the bob down, I got mine from B&Q and took the original airbox stud things with me so I could get the right thread. They were a little too long though so they each use 3 washers on top to get a tight seal

 

[Razman]

Cheers mate, trying to get it all together and MOT'd before MITCAR, never been to a meet so in a hurry to get it finished