u01rsb Posted April 4, 2009 Share Posted April 4, 2009 I bought and fitted a blanking plate for my engine from TST last year. I have a dry sump and have just upgraded the engine to high compression. It has now been suggested that I might now be better removing this blanking plate and re-fitting the engine breather. I have a breather on my dry sump overfill tank, does this not already do the job adequetly or with a 13:1 compression ratio would I be better refitting the original breather Link to comment Share on other sites More sharing options...
GasMan Posted April 4, 2009 Share Posted April 4, 2009 The following Quote is from the SBD website Suzuki Hayabusa dry sump kit installation intructions "It is beneficial to use this dry sump system with a completely sealed engine breather, however this can ONLY be done if your particular engine creates a vacuum. In order to check this, a monometer needs to be connected to the engine breather and the crankcase pressure measured. With the engine running on either a Dyno, race track or similar and under full load a vacuum should be present at all rpm. Every engine varies, and as such it is vital to monitor the crankcase pressure in your particular engine before attempting to blank the breather, if the crankcase pressure is positive then the breather should under no circumstance be blanked or damage will occur! This is the responsibility of the customer, if you do not have the necessary equipment to carry out this task, then we recommend the engine is left breathing to the drysump tank, which in turn breathes through the catch tank to atmosphere." Hope this helps? Matthew Link to comment Share on other sites More sharing options...
The Pikey Posted April 4, 2009 Share Posted April 4, 2009 Mine goes to the catch tank but my breather has reads on it which is only on the 2008/9 engines . J Edited by - Jason Fletcher on 4 Apr 2009 23:25:59 Link to comment Share on other sites More sharing options...
Mickrick Posted April 5, 2009 Share Posted April 5, 2009 my breather has reads on it Jason, am I assuming correctly, that you mean reeds in it? Link to comment Share on other sites More sharing options...
The Pikey Posted April 5, 2009 Share Posted April 5, 2009 yes mick Link to comment Share on other sites More sharing options...
Mickrick Posted April 5, 2009 Share Posted April 5, 2009 Jason, O/T but where did you drop on a 2008 model? 🥰 Link to comment Share on other sites More sharing options...
The Pikey Posted April 5, 2009 Share Posted April 5, 2009 Mick bought a new bike.. Jason Link to comment Share on other sites More sharing options...
DSL Posted April 6, 2009 Share Posted April 6, 2009 As posted by Gasman from the SBD website, unless you definitely have a vacuum you must run a breather, even if you do have a vacuum the benefits vrs the risks are minimal so best avoided to be honest. You still need to run the breather out of the usual Suzuki spot in addition to the vent on the dry sump tank *thumbup* Just been through all this on my Radical Busa drysump installation & two races yesterday all worked like a dream Link to comment Share on other sites More sharing options...
u01rsb Posted April 6, 2009 Author Share Posted April 6, 2009 Thanks for the response gents, I will investigate to see if mine has a vacuum and take it from there. Really helpful as always! I'll let you know where I end up with this..... 😬 Link to comment Share on other sites More sharing options...
DSL Posted April 6, 2009 Share Posted April 6, 2009 Even if you do have a Vacumm now, you may not have after some wear takes place on the engine. Having taken advice from various experienced engine people the benefits don't outway the risks Link to comment Share on other sites More sharing options...
u01rsb Posted April 7, 2009 Author Share Posted April 7, 2009 I think the best solution is going to be a reed valve linked from the breather on the engine to the breather on the dry sump tank. That way I get the vacuum advantage if available and also allow the escape of any positive pressure accumulation in the engine. Jason - have you any idea if I can retro fit the 08 one to an older engine? I can then get one from the local suzuki garage and bodge it in myself. Thanks, Rob Link to comment Share on other sites More sharing options...
The Pikey Posted April 7, 2009 Share Posted April 7, 2009 Rob I would think Suzuki have just made a different breather pot and not altered the engine housing so the new one may bolt straight on your engine. heres a pic of mine here Jason Link to comment Share on other sites More sharing options...
Irrelevant Posted April 8, 2009 Share Posted April 8, 2009 Mine goes to the catch tank but my breather has reads on it which is only on the 2008/9 engines Neat idea . .. just wonder why they bothered for a wet sump stock motor Guess it's some kind of emissions thingy . . . i.e. vapours only come out when the pressure increases rather than leaking out all the time... Link to comment Share on other sites More sharing options...
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