Running with no dumpvalve
06 January 2008, 05:10 PM
#1
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Running with no dumpvalve
could anyone on here give me some info on how a car will behave if running with no recirc/dump valve???
Am thinking of removing it but would like to know if the car will behave differently ie tickover/smoothness/etc.
P.s car in question is a version 5 sti ra with autronics ecu/Turbo Dynamics GT30/frontmount/etc....
Thanks
Am thinking of removing it but would like to know if the car will behave differently ie tickover/smoothness/etc.
P.s car in question is a version 5 sti ra with autronics ecu/Turbo Dynamics GT30/frontmount/etc....
Thanks
06 January 2008, 10:25 PM
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that turbo should be fine without it..
when you lift off it will stall the turbo blades and the air will pass back through the turbo.. makes a nice noise.. does stress the turbo but yours should be fine.
do it!
Simon
when you lift off it will stall the turbo blades and the air will pass back through the turbo.. makes a nice noise.. does stress the turbo but yours should be fine.
do it!
Simon
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06 January 2008, 11:36 PM
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blank em all off. Prepare to shorten the life span of your turbo though. And it will likely overfuel as well. should spit some flames out the rear. ultimately though there is a rearson that its on there. car will also feel slightly more jirky.
07 January 2008, 07:56 AM
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I suppose its easily reversible if i dont like it.......so the map will need a tweek when it is removed or can i run without it to see if i prefer it valveless.?
Car is going in for final mapping in a couple of weeks .......
Car is going in for final mapping in a couple of weeks .......
07 January 2008, 08:25 AM
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Is there any other sound make due to different pressure (i dont mean the sound dompvalves make) just any other sound. For instance a different sound of spool or a sound when you let off (yet again not the pssttt lol)
07 January 2008, 08:27 AM
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Im running with no DV at the moment on a TD04, replaced my Intercooler with one from a 97/98 car and some new pipwork (as my original pipework broke)...
Don't like it, car is deffinatly more jerky and dips at idle.. Getting the pipework to return it too standard... Going to wait till I have a few more bob before i do anything more performance wise to my motor!
Don't like it, car is deffinatly more jerky and dips at idle.. Getting the pipework to return it too standard... Going to wait till I have a few more bob before i do anything more performance wise to my motor!
18 February 2008, 07:06 PM
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Yes have ditched the valve completely and am now fully mapped.....Get a loud flutter at low revs on gearchange now and at high revs (ie over about 4500/5000 and above)you get a loud screech,quite high pitched...
Add this to the 3" straight through system and the Antilag function on the Autronics .....
A friend of mine who used to own a Tuscan and now has an M3 CSL was grinning like a schoolboy when i took him for a blast in it at the weekend.LOL...
Thanks to Paul and team(Zen Performance)...
19 February 2008, 02:14 PM
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Not good for the trubo, but the MHI's seem to survive it OK.
Simon
19 February 2008, 02:27 PM
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Seems to be a SN myth that all VFs can't take it. I'll be running my VF35 without a DV soon on the advice of a few well known peeps on here (I wn't name drop for once
)Fingers crossed I won't be eating my words...or should that be 'it won't be eating my compressor blades?'
19 February 2008, 04:11 PM
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19 February 2008, 04:38 PM
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I've blanked my wagon TD04 off and love the chatter u get from the blades stalling, i know it'll send her to an earlier grave but all the more reason to upgrade sooner!. Old bob is running 1.5 bar through a TD05 fully blanked and apparently no problems at all. So far so good.
20 February 2008, 07:25 AM
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ok i 'm gonna do this as well. iv got a baileys on just now, and the big pipe already has a bung in it - cool, i take it i remove the dumpvalve alltogether and joey up some sort of plate to cover the intercooler, then find a bung for the vacuum pipe?
20 February 2008, 07:37 AM
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I've blanked my wagon TD04 off and love the chatter u get from the blades stalling, i know it'll send her to an earlier grave but all the more reason to upgrade sooner!. Old bob is running 1.5 bar through a TD05 fully blanked and apparently no problems at all. So far so good.
this is true, no probs at all, not running a MAF so no jirky, runs and sounds spot on