dump valve safe or not
#1
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dump valve safe or not
right i know most on here hate them but i would like to fit a dump valve to my 98 2000 turbo if only for a while but am worried if it will course my engine to play up or destroy it or will it be ok
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got a baileys dv on mine came with the car when i bought it,had it on the rolling road for diagnostics power run etc and it caused no issues,does get annoying sometimes though as it is loud
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As you already know, pointless unless you have a MAF-less ECU set up... but all that will happen is that you'll run a bit rich for a fraction when you get back on the throttle.
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#11
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I love these threads (popcorn in hand)
There is plenty that can be said, but from my point of view listen to other peoples opinions, they cause poor running.
Something to chuckle at if your a BOV mad
http://www.youtube.com/watch?v=Z_fG_b65WiU
Rob
There is plenty that can be said, but from my point of view listen to other peoples opinions, they cause poor running.
Something to chuckle at if your a BOV mad
http://www.youtube.com/watch?v=Z_fG_b65WiU
Rob
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I've got a HKS SSQV on my 2005 UK STi with no trouble at all.
Last edited by malevolent_sti; 27 January 2012 at 10:03 PM. Reason: Extra!
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My old classic came with one (baileys one) it became tiresome and so I ended up reverting to standard. Plenty of scoobs and other turbo cars run with a "chav horn" fitted - best bet is to try yourself
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I love these threads (popcorn in hand)
There is plenty that can be said, but from my point of view listen to other peoples opinions, they cause poor running.
Something to chuckle at if your a BOV mad
http://www.youtube.com/watch?v=Z_fG_b65WiU
Rob
There is plenty that can be said, but from my point of view listen to other peoples opinions, they cause poor running.
Something to chuckle at if your a BOV mad
http://www.youtube.com/watch?v=Z_fG_b65WiU
Rob
Massive improvement when changing gears coming back onto boost.
Very pleased.
For all the firm believers out that stock is best, I would say upgrading even to decent recirc is a good move
#21
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The only way you can tell if your gaining imho is if you go from OEM to after market and feel a better response through the gears, that you didnt through the OEM, that would say to me that your OEM was on its way out. The OEM is by far the better valve for under 400+bhp apart from expensive after market recirc.
VTA's are far from ideal.
Ideal you would need to drive the car on a RR to get proper realistic verdict if you think the VTA is giving you better throttle response through the gears.
For me I found they were sh!te. I even bought a recirc kit for a HKS SSQV which was one of the best you could buy at the time, and for a £300< valve to recirc is what ****e, it did nothing over what a OEM valve would do, in fact it was very poor.
Rob
VTA's are far from ideal.
Ideal you would need to drive the car on a RR to get proper realistic verdict if you think the VTA is giving you better throttle response through the gears.
For me I found they were sh!te. I even bought a recirc kit for a HKS SSQV which was one of the best you could buy at the time, and for a £300< valve to recirc is what ****e, it did nothing over what a OEM valve would do, in fact it was very poor.
Rob
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#29
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I recently fitted a Turbosmart plumback recirculating dv @ £270, I had my suspicions on the safety of my oem dv at 1.6 bar boost, partly from what I was hearing, that very occaisionly some benifit was obtained from changing to an aftermarket item but mainly because I was getting some high turbo outlet temperatures, easily 180c-185c +,this at WOT, the sensor is at the end of the turbo/intercooler connecting pipe. The car had recently made 380hp/450lbsft on the RCM rollers, the turbo is a MD321h, AVO tmic,water/ meth injection, forged 2.5 conversion, 10% meth in fuel.The indication was and has been for some time that the turbo was on it's limit and a bigger turbo /frontmount was the way to go.
I decided to invest in a new DV first and after fitting, immediately had a problem with too much boost at WOT, so it was back onto the RCM rollers and at which point I decided to use the opportunity to increase the meth in the fuel by 10% to 20%inclusion and have it mapped accordingly. It wasn't many minutes before the car produced 434hp, a jump of 54hp!. Unfortunately at this level my 650 injectors maxed out and the car was running lean, final figure 419.7hp/450lbsft @1.45bar.
Interestingly turbo outlet temps are now down to 130c at WOT and thats 50c less my TMIC has to deal with.
My view and it is just that, ok the extra meth is known to have a big impact but at some point the oem dv had started to bleed boost back into the inlet tract. The turbo masked this by having to work harder but in doing so created a substantial amount of heat having a direct impact on ACT's.
thanks for reading
Trev
I decided to invest in a new DV first and after fitting, immediately had a problem with too much boost at WOT, so it was back onto the RCM rollers and at which point I decided to use the opportunity to increase the meth in the fuel by 10% to 20%inclusion and have it mapped accordingly. It wasn't many minutes before the car produced 434hp, a jump of 54hp!. Unfortunately at this level my 650 injectors maxed out and the car was running lean, final figure 419.7hp/450lbsft @1.45bar.
Interestingly turbo outlet temps are now down to 130c at WOT and thats 50c less my TMIC has to deal with.
My view and it is just that, ok the extra meth is known to have a big impact but at some point the oem dv had started to bleed boost back into the inlet tract. The turbo masked this by having to work harder but in doing so created a substantial amount of heat having a direct impact on ACT's.
thanks for reading
Trev
Last edited by trevsjwood; 29 January 2012 at 06:09 PM.
#30
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