the hillpower bend

[benji&eka]

how does this perform? i take it its silicone, therfore does it get sucked in under load? i.e how stiff is it?

 

[len_beach]

I am currently researching this subject as I am looking to use a piece of universal Samco hosing if it is possible.
The benefit of the silicone bend is that it allows a much smoother flow of air into the inlet manifold over the standard ribbed pipe. Furthemore, the silicone bend will not compress under acceleration, I don't think the standard pipe will either but the silicone will be even less prone to this.

 

[benji&eka]

i beleive the silicone would have less strength, hence the question

 

[gh172]

It's extremely stiff ... I can't imagine it distorting under any circumstances. There is also a small outlet halfway round for connecting a breather pipe - so some standard hose wouldn't cut it I don't think.

G

 

[benji&eka]

lol ta gh172. i'll probs phone hillpower tomorrow any way

 

[len_beach]

The 70mm bore Samco hose has a 5mm wall thickness which I would imagine to be extremely tough thus eliminating distortion.
gh172, I have been asking the question, on a couple of my previous cars, I have vented the oil breather pipe, do you think it would be an issue if I did the same on the 172?

 

[benji&eka]

its not an oil breather (if we are talking about the same one) it goes to the iscv and therfore needs to be where it is. the ccv goes in the bottom of the throttle body (if i remember correctly)

 

[len_beach]

The pipe which connects at 90 degrees to the inlet elbow? I haven't investigated this fully yet but I have slight oily deposits coming from this into my intake so presumed this would be the rocker cover breather pipe.

 

[benji&eka]

nah its the idle speed control valve pipe (iscv) the oily residue is from the crankcase ventilation that goes in the bottom of the throttle body (it pulls a little from there 'cos its closest to it) the rocker box breather goes to the charcoal canister

 

[Nick Hill]

The pipe you are talking about from beneath the coil area to the inlet pipe is the engine crankcase breather, which, for emmision regulations should be feed back into the engine intake. That said you wont find them recirculating on a race car often. The Mk 2 172 has fly by wire throttle and hence there is no idle speed valve fitted to them. The throttle stepper motor varies the butterfly to control idle speed.
With our elbow I have incorperated the breather pipe so it mets emmision regs still.

 

[Fred@BTM]

^^^and it works very well^^^

highly recomended

watch what happens to an OE pipe on the rollers!!

 

[len_beach]

So this pipe:

Is the crankcase breather as I first suspected?
If that is the case I will vent it and seal the inlet as emissions are only tested from the exhaust and not the entire car.
Less dirty gasses means more o2 meaning better combustion. Superb.

 

[benji&eka]

aaah, i thought it was a ph1 172
the pic was kinda a giveaway

 

[Ali]

how much are the samco/Hillpower bends?

 

[gh172]

The pipe you are talking about from beneath the coil area to the inlet pipe is the engine crankcase breather, which, for emmision regulations should be feed back into the engine intake. That said you wont find them recirculating on a race car often.

But if you don't recirculate it you're going to need a catch tank aren't you? Or a lot of engine cleaner... My 7 had a simple bottle clipped to a chassis rail to take the output from the crankcase breather, and it's not a trivial amount of crap comes out.

G

 

[Nick Hill]

If you have wear in the engine bores you are likely to get oil coming from the breather and as you say it does make a bit of a mess. If you dont want any mess then you are best getting a catch bottle, by which time you may as well have bought one of our inlet hoses which recilculates the engine breather.

 

[gh172]

by which time you may as well have bought one of our inlet hoses which recilculates the engine breather.

Agree with that. But I found Nick's bend was too tight to fit over the standard airbox.

G

 

[len_beach]

But if you don't recirculate it you're going to need a catch tank aren't you? Or a lot of engine cleaner... My 7 had a simple bottle clipped to a chassis rail to take the output from the crankcase breather, and it's not a trivial amount of crap comes out.

G

Well I found out the other night that I was achieving the same effect as no recirculating breather.
My car was bogging down when pulling away in 1st. On investigation I found that the breather pipe was off on the block end so the car was drawing air constantly. The inside of the engine cover is now covered in an oily film.
My plan is a custom straight through bend made by Team Think then a long length of hose running down the firewall aimed at the road.
If that doesn't work, Team Think do 1 litre catch tanks at a cracking price.

 

[benji&eka]

team think?
are they anything to do with think automotive?

 

[benji&eka]

and back to my question
i take it hillpower do one for a ph1 172 and that it is fairly strong?

 

[len_beach]

team think?
are they anything to do with think automotive?

That's the one mate. I've sorted out with Matt who seems like a top bloke.
As for the mk1, I suppose someone must make one. PM Team Think and see what they can knock.

 

[benji&eka]

are team think on here then??
'cos i got an account with think automotive

 

[benji&eka]

think automotive do oil coolers, pipe, joiners. vehicle plumbing ect.
are we talkin' bout the same people?

 

[len_beach]

Yes mate: http://cliosport.net/forum/member.php?userid=4380
Or contact Matt on: 020 8568 1172 during working hours or email matt@thinkauto.com
I ordered my elbow today, straight through with no breather inlet all for less than £20 delivered. I think the Hill Power bend is about £50. Top job, should be here tomorrow.
Crank case breather is now a 1m length of pipe vented under the car.
I'll post pics when it arrives.