Info about Bosch Bypass valves

[aye mate]

A nice write-up to read for anyone considering getting rid of that weak stock bypass valve and who doesn't want a atmospherically vented Blow Off Valve(BOV) Enjoy!

http://wwwrsphysse.anu.edu.au/~amh110/Technical_pages/blow_off_valve.htm

 

[isnms]

http://www.maximumautoparts.com/SA_Charge~Air~Bypass~Valve_mo.html
the second one on this page has the correct part number

$26.82

 

[jester1341]

if anyone goes bosch be sure to get the 110 NOT the 103........ask jake what happens if you get a 103......hehe

john

P.S.........okay i'll tell you........you BREAK IT!!

 

[aye mate]

Wrong! My 103 still works! It was the TB->3000 pipe coupler that was leaking. The 103 does "hoot" more than my 110 tho'. I wouldn't trust it with more than 12 psi.

 

[isnms]

If I recall correctly, the 110 is the new number for the 103.
It's the 108 that you don't want.
edit: don't take that as gospel. i'll have to look for the info i am referring to.
edit2: ok, it seems that 103 and 108 are the same. 110 is still the one to get.
http://www.supraforums.com/forum/showthread.php?t=72552&p=632088
http://www.s4biturbo.com/art-dvtests2.shtml
http://www.s4biturbo.com/art-dvtests.shtml

 

[aye mate]

The 103 I got is not metal inside, my 110 does. Its also a little bit lighter than my 110(cause no metal internals.) It might be just me but I also think that the spring in the 103 is not as stiff cause, as I said before, it hoots more than my 110. There is a difference between the 103 and 110, if there wasn't why 2 part numbers? Not trying to be a jerk but that doesn't make sense to me.

 

[isnms]

If you're asking me, I corrected myself

edit2: ok, it seems that 103 and 108 are the same. 110 is still the one to get.

This information, is in the link, on the very first post

I compared the readily available Bosch valve # 0 280 142 103 (recommended in magazine tests) that I and others have used for a couple of years in Volvo turbos, against a Bosch valve used in Porsches (and sold only through a Porsche dealer # 993.110.337.50) (in reality Bosch # 0 280 142 108); described in Porsche speak as an 'Air Cut Off Valve' (reportably off a 933 twin turbo).
Both valves are plastic moulded, look the same, and have exactly the same inside and outside diameters.

One reason they could be the same but have different numbers is that one is for Volvo and the other for Porsche :dunno:

 

[aye mate]

Sorry about that, I did't see your edits. I guess that could be a possibility about one number for Porsche and one for Volvo. I don't know. I guess it doesn't really matter cause the one to get is the 110! Cheers!

 

[jester1341]

glad to see you guys made up....hehe

and i was wrong, you 'might' not break it.....but lets all play it safe and buy the 110

speaking of which i have one for sale with everything you need to drop it right in only used it for a month or two good as new[which is how i bought it] 50 bux plus shipping

john

 

[isnms]

haha, it's all good
following this thread, I had to confirm what I had. It came with the car and turns out to be a 103. Well I got the 110 and put it on this weekend

 

[malloynx]

here is what i found out. i have been running a 110 for a long ass time. the 110 was never designed as a "upgraded" BPV. it simply replaced the 103. the 103 has been long out of production and if you get one, chance are it was made long ago.

saab started using the 110 series on the viggen models (higher end car) and porsche used them on their 911's.

i just get pissed when vendors jack up the price on these and claim there the performance model.

 

[jester1341]

i dunno about 'performance' model but have you compared the two side by side??

it is quite evident they are different, the main difference is the 110 is heavier[due to it's metal inerds]

i dunno how much more efficent it is but more than a few pepl have atested to the 110's superiority.

that said i doubt it costs saab 50 bux to get one.....more like 5

john

 

[aye mate]

http://www.turbosmart.com.au/bov_kompact.htm

Heres a link for a different BPV that used as a replacement for the Bosch units. Says on the site that its a higher flowing valve than the Bosch ones. Might be a good idea for folks wanting a BPV but higher flow than a Bosch.

BTW, IJ posted this in a technical question post. So give points to IJ for this one!

 

[isnms]

APS has a similar one too
http://www.supramania.com/forums/showthread.php?t=5330

 

[Wendigo]

Is there any advantage/disadventage to using the 110 in line with, let's say, a GReddy type R BOV?

 

[shaeff]

yes. it'll cause LESS of a rich condition when the BOV purges, causing less stumbling, no stalling, etc...

many people run two BOV/BPV's, one vented, and one non vented.

-shaeff