Rik 0 Posted August 23, 2007 Is there any constraints for fitting the air filter to throttle body trumpets? I.e. Is there a suggested gap to leave? or no gap? etc etc...? I'm sure it would make a difference if the filter was touching the actual trumpets or if it was 30mm away? I'm running 90mm jenvey trumpets modified to fit to GSXR 750 48mm throttle bodies. Rik Share this post Link to post Share on other sites
Richie-Van-GTi 74 2 Cars Posted August 23, 2007 I was told have 10mm between the filter and trumpet end and then 15mm in front of the filter minimum. Unless you use socks. Share this post Link to post Share on other sites
engine killer 6 Posted August 23, 2007 Is there any constraints for fitting the air filter to throttle body trumpets? I.e. Is there a suggested gap to leave? or no gap? etc etc...? I'm sure it would make a difference if the filter was touching the actual trumpets or if it was 30mm away? I'm running 90mm jenvey trumpets modified to fit to GSXR 750 48mm throttle bodies. Rik if you are using socks, minimum of 20mm-30mm is needed otherwise it will suck the circle bit of the filter into the tb. using an air box will be much safer. due to room constrain (no airbox), i have replaced a few set of sock already in the last two years. Share this post Link to post Share on other sites
Sam 4 Posted August 23, 2007 Those socks are dog turd. So many stories of them being sucked into the trumpet. I'd recommend the PX500 style filter any day with decent clearance. Here's an example Share this post Link to post Share on other sites
Rik 0 Posted August 23, 2007 I was told have 10mm between the filter and trumpet end and then 15mm in front of the filter minimum. Unless you use socks. Richie-Van-GTi - not really sure what your saying here! What do you mean in front of the filter? do you mean make sure there is space in front of the element? I.e so the rad aint in the way etc?!? Not thought about airbox, would be nice to have one like Martins (Crf450) and have a panel filter, but i dont want to start messing about with a carbon/plastic airbox! Rik Share this post Link to post Share on other sites
Sandy 191 Posted August 23, 2007 If you want an airbox badly, keep the volume and entry as large as practically possible, or your lovely TB's will not be able to give their full potential. Share this post Link to post Share on other sites
benlilly 0 Posted August 23, 2007 Hi Rik, Just found this on Pipercross's website "NOTE - Always fit the largest filter possible and ensure that there is a minimum of 19mm between the trumpet mouth and the inner face of the filter." Share this post Link to post Share on other sites
engine killer 6 Posted August 24, 2007 Those socks are dog turd. So many stories of them being sucked into the trumpet. I'd recommend the PX500 style filter any day with decent clearance. Here's an example I can hardly fit one of this because lack of room This was what I have done to ensure enough cold fresh air for the engine. http://rides.webshots.com/photo/2637827940084130750PFUZQs http://rides.webshots.com/photo/2071615600084130750ImkMZx And this is the second generation of the induction panel with the bonnet lock removed. http://rides.webshots.com/photo/2740068070084130750qHsEvj http://rides.webshots.com/photo/2097161520084130750cwCiIG I guess the air pressure in front of the filter with this setup (when the car is on the move, the air banging into the filter) should be higher than inside an airbox. Share this post Link to post Share on other sites
Rik 0 Posted August 24, 2007 anyone know of a filter with the internal depth of about 125mm? was gonna get an ITG but they only do upto 100mm internals, (I could possibly but a spacer between the back plate and the throttle body to push the filter out?) I'll be running 90mm Trumpets. Rik Share this post Link to post Share on other sites
Sandy 191 Posted August 24, 2007 Get the back plate welded onto the back of the trumpet bellmouths, works brilliantly and very space efficient. Socks are poo, they kill power and noise, I've taken mine off, it's a silly risk I know, but they really do take the edge off the performance and I haven't had a chance to sort my backplate out yet. Share this post Link to post Share on other sites
Rik 0 Posted August 27, 2007 thats exactly what i'll be doing sandy, got 90mm jenvey trumpets, and i'm designing a flange that i can weld to the throttle body so the trumpets bolt straight on! Any one know of a 110mm internal filter i can fit? Rik Share this post Link to post Share on other sites
Sandy 191 Posted August 27, 2007 Ah right, I meant onto the back of the trumpet mouths, like this: http://noboost.com/temp/sandy/16v07.jpg Share this post Link to post Share on other sites
Rik 0 Posted August 27, 2007 I was told by jenvey this can sap the power? cant see the difference myself. What filter are you going to run with that then? Share this post Link to post Share on other sites
Sandy 191 Posted August 27, 2007 Don't believe everything Jenvey say, not all of their advice is definitive. Not in my experience anyway... Share this post Link to post Share on other sites
Rik 0 Posted August 27, 2007 I didnt believe it myself, surely it makes no difference what so ever? The only reasonable explanation is the air filter protects the trumpets keeping them cooler, meaning the inlet air temp would be lower... And how about the filter? Share this post Link to post Share on other sites
Sandy 191 Posted August 27, 2007 Over hypothesising I reckon. The temp of the incoming air dictates the trumpet temp more than radiated heat I would say. Then use a shallower filter, around 30-40mm clearance. Share this post Link to post Share on other sites
