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Discussion Starter #1
i got told yesterday i could put a blow off valve into my golf 1.9tdi, now im not running anything extravagent yet but i do love that ksssssss sound.

I know that it may not be a necesary addition to the engine but lets just say i WANT to put it in for ****s n giggles the only thing im worried about is if it would have any negative effect on the engine cause then it would be a no brainer. Also are there any positive effects i may experience?

Im hearing stuff all over the place about this subject and i need some help to make a final decision.

any input is welcome and well recieved

ps: i told this person i was getting an egr elimination kit and he said i could put the blowoff there....is that something i wanna do? i thought it went on the regular intake not the intercooler return.
 

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A blow off valve was originally an emissions device on gas cars.

When the throttle quickly closed during boost the backed up pressure had to go somewhere and that was out a recirculation or blow off valve. If not, it's not good for the turbo and the MAF sensor wasn't smart enough to tell the difference between air coming in or out.

Your TDI does not have a throttle and even if it did, the MAF sensor is smart enough to tell the difference between air coming in or out. I don't see how placing a blow off valve at the EGR spot will do anything.

So to answer your post, no pros, cons=wasted money. Also, no need for double posts, I have removed your mk4 section post.
 

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Discussion Starter #4
meh well i straightpiped my car no cat no muffler so im happy with my turbo whistle il live without that bov sound. what about an egr delete kit??? that should help with that gunk buildup right??? are there any other pros?
 

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The EGR delete kit will help with reducing carbon buildup. If you have emissions checks where you live you won't pass though since it'll set a CEL. You need chip tuning to delete the EGR w/no CEL. As a side benefit, chip tuning can increase fueling and boost = :D Cons: longer engine warmup and obviously higher emissions. The reason the engine will take slightly longer to warm up is because you don't have engine coolant being warmed by the EGR cooler. The EGR cooler not only cools the EGR, it also transfers heat to the coolant. This lets the engine warm up slightly faster (always a good thing).

You can try a racepipe for your TDI from dieselgeek or a simple block off plate. The other pro is simpler maintenance since you're removing a bunch of stuff.
 

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Discussion Starter #6
speaking of chips i was looking on ebay for a performance mod chip/box is there any brand you would recomend i stay away from because of quality or risk involved. It's seems like everyone and his uncle has their own brand of mod chip

Thanks alot for taking the time to answer my questions chitty
 

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Remap bud, the tuning boxes are a bit lame in comparison and are just a way of fooling the ecu into giving more fuel but the remap takes care of the whole engine so ups the fuel and the turbo plus deals with timing etc too.:)
 

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speaking of chips i was looking on ebay for a performance mod chip/box is there any brand you would recomend i stay away from because of quality or risk involved. It's seems like everyone and his uncle has their own brand of mod chip

Thanks alot for taking the time to answer my questions chitty
2nd, a chip is what you want, not a tuning box. Check out kermatdi.com.
 

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Ok, to go down the list, first the BOV, the BOV works by opening if pressure exceeds a certain threshold. Since you don't have a throttle plate, the BOV is unlikely to ever open. Worse is if it ever does malfunction and open, it's most likely to do so under boost which kills performance.

Next, EGR delete, cleaner oil, no gunk buildup, engine lasts longer and is lower maintenance. Downsides, as stated, longer warmup and emissions issues possible.

Finally tuning. Skip the box, just go with a good flash. It can be done through the OBD2 port so it's actually easier than a tuning box which has to be spliced in. You'll also get better results. Finally, it's pretty much a must if you're doing any emissions deletes at all.
 
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