cheapy BOOST controller valves ??

steptoe · Post by **steptoe** » Sun Jan 16, 2011 10:31 pm

Who has got one in use?

I know that the more you spend the better you get, but I got this before I read that these are not the greatest for the job. Just wanna try it to see if it holds boost better than the factory diafragem jigger (maybe wind it up a pound or two ! )

I am looking to solve a little issue at load that is not there on the flat screaming runs but look at a hill or even slight incline and there is a bit of fluffing going on and new tune bits in place not fixing it. Have new coil from factory to replace year old Chinese bosch unit

Paid about $25 posted on ebay a few years back now, big knob with + - symbols, a path across the bleed screw and I think ( not sure where it is now) a bleed off at the bottom that I had better plumb its LPG vapours back somewhere safe.
The Chinglish destructions that came with it were of little help from memory but think it can be mounted inside so need some rigid vacuum hose - any recommendations with this baby and hoses?

Thanks

Gannon · Post by **Gannon** » Mon Jan 17, 2011 5:15 am

www.ebay.com.au/Turbotech manual turbo boost controller

For $29.90, this is the best value for money boost controller you can buy, and its a ball and spring setup, better than just a bleed valve

Post by **Alex** » Mon Jan 17, 2011 10:14 am

i had a blead valve setup on my l-series. Was abit spikey, but worked well.

alex

steptoe · Post by **steptoe** » Tue Jan 18, 2011 7:44 am

Thanks, might look into the link Gannon. I note that when I had a weak valve spring causing all sorts of greif, the boost gauge quivered with auto box, immediately after fitting new valve spring set and jam the 5 speed box in I got nice sharp indication and it went well hoding boost up hills in 4 and 5 gear.Still got an odd lack of power coming on up inclines and boost stays fine. Just a coil to try now.

To read the article reprinted on ebay snow storm blots out retail price top of article, yet at the end of 2nd page has $24.90 as price. Old mag, inflation or popularity ? If it has such good results I will be happy, happy too if it fixes my problem.

Gannon, thanks for your efforts. That light switch is still a project to look at.....

steptoe · Post by **steptoe** » Thu Jan 20, 2011 7:01 pm

OK. Got one in mail today. They have a good review on themselves don't they?

Something is different i see now - only two connections, IN and OUT. The bleed is a little hole in the back where I will lose vapours (and they STINK!)

I'll make a casing at the end of a hose to return volatile bleed off to air box and come back in here to advise of result if any. Option to increase boost now with not so much trepidation as with the one from Ong Fa's little workshop

Gannon · Post by **Gannon** » Thu Jan 20, 2011 7:20 pm

Did you get the one i suggested?

If you did, it isnt a bleed valve, and thus wont leak air.

It is a spring and valve that works like a pressure reducer. The little hole is just to let air out of the wastegate hose when the ball valve closes.

steptoe · Post by **steptoe** » Thu Jan 20, 2011 10:39 pm

it is the one you linked, the turbosmart PMBC, yep. need to put brain in for this one - the pressure in my waste gate actuator line does not contain share same air of inlet manifold. You challenge my head at this time of night (daytime too). I feed LPG vapours just after air filter, they then enter turbo get mixed and compressed spit out into throttle body.

I am trying to work out where else I have seen this style of pressure valve where if you restruct the outlet get a vibration. Water plumbing gadget in cottage construction??

One for sure was a fuel pressure control valve in a Lucas mechanical fuel injection , jigger o ring inside was shot, internals shimmable to alter pressure and return line was walloping against rear inside boot panel....

this unit seems ingenius don't it.

Wanna buy Fong Ahs boost controller

cheap....

Gannon · Post by **Gannon** » Fri Jan 21, 2011 5:35 am

Have a read of this - [URL="http://autospeed.com.au/cms/article.html?&A=2687"[Autospeed.com/Thirty Dollar Boost Control[/URL]

A small hole in the valve body (called an "excess pressure valve") allows pressurised air to escape from between the controller and wastegate actuator following a boost event.

So this means that it is not venting LPG vapours during boosting, it only releases the pressure wastegate hose when you finish boosting so the wastegate can close again.

If the wastegate hose is 6mm in diameter and 200mm long, the total air you will loose to the engine bay every time you un-boostwill be 5.6mL. And seeing that it is mixed with gas at 15.7:1, there will be .35mL of gas lost, or bugger all.

steptoe · Post by **steptoe** » Fri Jan 21, 2011 8:22 pm

Another good article there on this little unit. Something has also dawned on me is that I cannot reduce max boost pressure below that of the preset factory diaphragm. The obvious use of this unit is to increase boost presure above factory with some precision.

Gonna be some real short hoses, 1/4" fuel hose and some injector clamps, and of course I pulled mine apart losing their preset level, just before this next pic appeared. I put it back with spring going other way than depicted on the red unit. I got a blue one !!

steptoe · Post by **steptoe** » Sat Jan 22, 2011 11:54 am

It is in - took about five minutes or less. It feels crisper way before it gets near maximum boost of TWELVE psi !!?? How could it feel better, surely 5 pounds is five pounds? Need to adjust that down a notch. One article claimed a full turn gave them another pound, from 12 to 13. Instructions do say adjustments are very small. I only gave it an eighth or less of a turn to go from 8 to 12, and boost gauge [Speco] still quivers at maximum. Enjoying very short bursts of twelve and also watching my knock sensors readout - still no detonation indication as it stays dead flat 1.7Volts

littlewhiteute · Post by **littlewhiteute** » Sat Jan 22, 2011 12:21 pm

The sensitivity of the valve depends on the size of the restrictor you run prior to the tee.

steptoe · Post by **steptoe** » Sat Jan 22, 2011 5:12 pm

control valve or gauge? My gauge could be Te'd in a better place, I will try. The controlle is just 80mm in and 100mm out in hose between turbo and wastegate with 1/4" hose.

Gees, 12 pounds boost huh ? Feels too strong with front boots losing traction more often !

littlewhiteute · Post by **littlewhiteute** » Sat Jan 22, 2011 5:17 pm

littlewhiteute wrote:The sensitivity of the valve depends on the size of the restrictor you run prior to the tee.

Valve - needle valve - manual boost controller.

A lot of factory turbos run a restrictor (about .030 - .040) in the actuator line prior to the tee piece for boost bleed valves.

steptoe · Post by **steptoe** » Sat Jan 22, 2011 8:18 pm

Ah, righto, so that is another benfit of this design, no needle valve just ball and spring and ball seat and that little bleed off valve that is bleeding off LPG vapours under boost - will need to harness these for safety

This unit, not sure of the benefits in my application as no dyno handy but it has got harder to get traction in the wet, or easier to lose it to put it another way

steptoe · Post by **steptoe** » Thu Mar 03, 2011 9:36 am

and, so i don't lose instructions, here they are , preserved

[IMG=http://img38.imageshack.us/img38/1092/t ... ctions.jpg][/IMG]

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steptoe · Post by **steptoe** » Thu Mar 03, 2011 9:37 am

oops, wrong line

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