Yandards 0 Posted July 28, 2005 Finished knife edging my TB for my project last night at work, quite pleased with it so here is a picture.. ..and yes I know it does not need to be shinny but it looks nice and you can see you have taken all the sanding and filing marks out then :wink: Quote Share this post Link to post Share on other sites
NickVR6 0 Posted July 28, 2005 Fancy doing mine mate! Or have you had enough of my car in your life!! Looks fantastic. Quote Share this post Link to post Share on other sites
Son of a Beesting 0 Posted July 28, 2005 Looks good!! Hate to think how many hours went into it!! Still good job, your right to be pleased with it 8) Quote Share this post Link to post Share on other sites
Yandards 0 Posted July 28, 2005 Er no more than 4 hours work.. air tools are good :D Quote Share this post Link to post Share on other sites
Son of a Beesting 0 Posted July 28, 2005 Oh to have the money for air tools!! :wink: Quote Share this post Link to post Share on other sites
h100vw 0 Posted July 28, 2005 Glad my tax £s aren't being wasted! Got no wars to attend to? :mrgreen: Quote Share this post Link to post Share on other sites
randal 0 Posted July 28, 2005 Looks pretty sweet 8) Let us know what improvements you get over the stock, cos I think I'll be doing mine too. Albeit without air tools, might take a little while longer.... Quote Share this post Link to post Share on other sites
Yandards 0 Posted July 28, 2005 Not at all Gavin...:lol: It was of course worked during my tea breaks :wink: Can't let you know what the improvement will be Randal as its part of a larger package (16v G60) Quote Share this post Link to post Share on other sites
chrishill 0 Posted July 28, 2005 can anyone explain knife edging and its advantages to the uneducated? (ie me) Quote Share this post Link to post Share on other sites
randal 0 Posted July 28, 2005 Can't let you know what the improvement will be Randal as its part of a larger package (16v G60) Nice, very nice. 8) Quote Share this post Link to post Share on other sites
Yandards 0 Posted July 28, 2005 If you look at a 16v TB (Not sure about a VR) you will that VW have made the casting similar to the work I have done on my TB. Previously it looked like the picture below (Its the back but it will do) As you have air entering this area it creates turbulence because of the large flat area - this is very ineffcient as it creates excess pressure. By knife edging the flat lump you allow the air to separate cleanly and it reduces turbulence. The guys on here that have done this report an increased crispness in the throttle response (No turbulence to overcome) and a noticeable increase in acceleration (Improved effciency) Quote Share this post Link to post Share on other sites
chrishill 0 Posted July 28, 2005 got you, so basically you've 'thinned out' the middle section between the two circles to improve the flow through the TB? Quote Share this post Link to post Share on other sites
davidwort 0 Posted July 28, 2005 If you look at a 16v TB (Not sure about a VR) you will that VW have made the casting similar to the work I have done on my TB. Previously it looked like the picture below (Its the back but it will do) As you have air entering this area it creates turbulence because of the large flat area - this is very ineffcient as it creates excess pressure. By knife edging the flat lump you allow the air to separate cleanly and it reduces turbulence. The guys on here that have done this report an increased crispness in the throttle response (No turbulence to overcome) and a noticeable increase in acceleration (Improved effciency) would it be worthwhile narrowing part of the spindles too, they seem like quite an obstruction, especially on full throttle? David. Quote Share this post Link to post Share on other sites
Yandards 0 Posted July 28, 2005 Yup, creating a smoother path for the air flow, you can see the old gasket marks on the pic above to give you an idea of area that was worked. In an ideal world you would take more out but the TB is not a uniform width so you would end up with a hole in it! Quote Share this post Link to post Share on other sites
olly elworthy 0 Posted July 28, 2005 its also worth porting the adaptor that bolts between the throtttle body and the boost inlet pipe as it is about 4 - 5mm thick where it enters the pipe,, also not good for turbulence,, Quote Share this post Link to post Share on other sites
Henny 0 Posted July 28, 2005 olly elworthy, ooh, yes... mine's about 2mm thick now... ;) Quote Share this post Link to post Share on other sites
2cc 0 Posted July 28, 2005 Looks cool Yan. Once I get moved and take the valver to bits I'll be round to see you........ Quote Share this post Link to post Share on other sites
olly elworthy 0 Posted July 28, 2005 olly elworthy, ooh, yes... mine's about 2mm thick now... ;) ideal, gonna sort mine out when i fit my flowed inlet manifold and big valve head,,,, cant wait!! just gotta get my nurburgring trip done first!! :wink: Quote Share this post Link to post Share on other sites
flusted 0 Posted July 28, 2005 I slimmed my spindles down and fitted countersunk screws cos the screw heads are massive and a big restriction Quote Share this post Link to post Share on other sites
billinjah 0 Posted July 29, 2005 ot but flusted where did you get the ally expansion tank? Quote Share this post Link to post Share on other sites
h100vw 0 Posted July 30, 2005 Not at all Gavin...:lol: It was of course worked during my tea breaks :wink: ) Which, as you are a heavy are much shorter than those of the fairies eh :roll: :wink: Quote Share this post Link to post Share on other sites
flusted 0 Posted July 30, 2005 ot but flusted where did you get the ally expansion tank? Allard motorsport used to sell em on ebay,give em a buzz Quote Share this post Link to post Share on other sites
Yandards 0 Posted July 30, 2005 Fairies dont work they just come in and attend 'Card School' Was already 'de-coring' the other section of the TB, thanks for the tip about the bolt heads though flusted :) Quote Share this post Link to post Share on other sites
