blow off valve choices

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Re: blow off valve choices [Re: ] #1444681 24/08/2013 09:35 24/08/2013 09:35
K KBT Unregistered
KBT Unregistered K	Well you just blank the fitting on the black pipe in addition to the one you have already blanked. @Gunzi. Glad to hear you have not had a problem. The turbo I broke made a peak of 34psi(Lancia 4 pot-so 6:1 and high boost). This five pot motor has 7:1 I believe so not huge pressure. Yes I know there are a few 2 bar+ cars out there, I wonder if any of those would run BOVless. When the pressure is greater than the strength of the vanes they bend. Perhaps we could hear from an expert?

Re: blow off valve choices [Re: ] #1444683 24/08/2013 09:45 24/08/2013 09:45
Joined: Dec 2005 Posts: 19,947 North wales pinin_prestatyn Forum veteran
pinin_prestatyn Forum veteran Joined: Dec 2005 Posts: 19,947 North wales	Ah, the old no DV Chestnut! If there was no need for one, why did Fiat bother? That's my thinking. You just blank off both holes Muzzy2. Coopless!

Re: blow off valve choices [Re: pinin_prestatyn] #1444700 24/08/2013 11:44 24/08/2013 11:44
S suba Unregistered
suba Unregistered S	I've not run one on the rx7 for ages, got fed up with testing a blitz one for leaks...... Runs fine, but then it's a journal bearing turbo and 0.9 bar of boost only. If buying one new I would go to forge direct, very well made etc.

Re: blow off valve choices [Re: ] #1444705 24/08/2013 12:30 24/08/2013 12:30
M Muzzynumber2 Unregistered
Muzzynumber2 Unregistered M	What about the small vac pipe that goes to the plenum? just bung that 2? Think I'll give forge a ring and see if they will send me a new top and maybe a new spring.

Re: blow off valve choices [Re: ] #1444707 24/08/2013 12:36 24/08/2013 12:36
K KBT Unregistered
KBT Unregistered K	Yep, bung that one too. But I still don`t recommend. The least problem if you have no dump valve is turbo loses some spin between gears.

Re: blow off valve choices [Re: ] #1444736 24/08/2013 14:51 24/08/2013 14:51
Joined: Jul 2012 Posts: 1,650 Dark side of the Moon H_R My life on the forum
H_R My life on the forum Joined: Jul 2012 Posts: 1,650 Dark side of the Moon	Im NO expert so don't shoot me down in flames! Just interjecting my thoughts! I thought the guys that didn't run with a dump valve were the rally cars as they generally flat shift (change gear whilst flat out on the throttle) its generally only a suddenly closed throttle whilst at high boost levels that's supposedly a problem (boost has no where to go all of a sudden so sends shock waves up and down the pipe work, I believe it's the shock waves that can damage the turbo My car is for pleasure only and I would like as many years pleasure from it as possible so basically it had a dump valve as standard so it will always have one, unless somebody convinced me otherwise, but I quite understand the idea of people trying out things and being different and the noise without one is pretty cool!

Re: blow off valve choices [Re: ] #1503241 15/08/2014 20:25 15/08/2014 20:25
F furry Unregistered
furry Unregistered F	Originally Posted by KBT This one came on the car. I just converted it to recirculate yesterday. Best of both worlds, stealthy or remove one pipe from SIP and fit silicon endcap for maximum attention. 60 second job. Sorry to resurrect an old thread but I have one of these hks valves minus the recirc. Is this one you have fitted (if you still own one or use the site) on a straight induction pipe, or the standard s pipe? can anyone else help me in this matter on what I need to fit as I know not what to get? Cheers David

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