Brennan Posted June 23, 2015 Share Posted June 23, 2015 Yeah it depends on the shape of your adaptor manifold, whether it would suit silvertop or blacktop throttles. As blacktops have the silly shaped exit hole, silvertop a bit rounder. Yeah I think there are some bikes running bigger throttles than that. Some of the other options are trickier to adjust the spacing between the throttles, I think the GTR ones are in cast pairs? I was browsing some Honda forums and a lot of those guys run 50+mm or 60mm quad throttles, they've got off the shelf kits... but they cost a friggen fortune! the cast adaptor i used has heaps of chunkiness to shave off to be either blacktop or silvertop. and yes GTR is cast in pairs, but that shouldn't be to much of a problem. We shall see. 1 Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 23, 2015 Share Posted June 23, 2015 is the honda k series motor running the cam direct on bucket or do they set the cams the same as sr20 with hydrolic rocker arms Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 23, 2015 Share Posted June 23, 2015 and the biggest quads i have seen on the hondas is 52 mm Link to comment Share on other sites More sharing options...
Rookie Posted June 23, 2015 Share Posted June 23, 2015 The K head isn't cam on bucket, so you get a huge advantage there in terms of lift and allowable cam profiles. Low lift flow is paramount to making a motor drivable, and again Honda killed it in this respect. Basically it isn't much trouble to get a Honda head to flow 370+ cfm at 28", which is phenomenal. Also it is reasonably common to see K series on 60mm ITBs, which is needed to keep up with 370 cfm. The real magic of hondas is how they manage to keep a 99mm stroke bottom end together at 10,000 rpm... 1 Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 25, 2015 Share Posted June 25, 2015 yeah thats real good the best we have had from a beams head is 340 cfm at 550 thou lift in 28 inches Link to comment Share on other sites More sharing options...
Rookie Posted June 25, 2015 Share Posted June 25, 2015 How do you get 550 on a cam on bucket? Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 25, 2015 Share Posted June 25, 2015 easy the cams i have at the moment are 560 thou lift with some vvti on inlet and 540 on the exhaust pearce has a set as well Link to comment Share on other sites More sharing options...
Rookie Posted June 25, 2015 Share Posted June 25, 2015 They must kill the buckets no? Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 25, 2015 Share Posted June 25, 2015 no they were designed to fit onto a 33mm bucket ,also running a 98lb spring seated Link to comment Share on other sites More sharing options...
yoeddynz Posted June 27, 2015 Share Posted June 27, 2015 Ignore comparing the differences in cross section and just think of the quick on/off reaction of ITBs, the extra doort noises and the looks of them with a pipercross filter 1 Link to comment Share on other sites More sharing options...
Roman Posted June 28, 2015 Share Posted June 28, 2015 Heh yep I hear ya - all good points. At this point I'm keen to go back to the staged injection manifold once the engine is back in the car, and experiment with that a bit more. 1 Link to comment Share on other sites More sharing options...
Truenotch Posted June 30, 2015 Share Posted June 30, 2015 Are those measurements both taken the same way though? i.e. @50thou lift? Link to comment Share on other sites More sharing options...
Roman Posted June 30, 2015 Share Posted June 30, 2015 Not too sure to be honest. Does your engine have standard cams still? In other news, I've been pestering Link to add an RPM based table for setting the inner/outer ratio for the staged injection - They've said it'll be included in an upcoming firmware version, yuss!As currently you can only go by MAP (Boost=MOAR INJECTORS!) or TPS which isnt too useful for NA stuff either. Link to comment Share on other sites More sharing options...
Celica RA45 Posted June 30, 2015 Share Posted June 30, 2015 the honda would have a different rocker ratio than the direct on bucket set up Link to comment Share on other sites More sharing options...
Maru-So Posted July 16, 2015 Share Posted July 16, 2015 Nice development work on the airbox! Something about that long airbox simulation is ringing warning bells for me. Shouldn't there be some boundary layer effects visible? I would expect to see some effects akin to fluid flow between two plates (but 3D) what does the velocity contour look like? Link to comment Share on other sites More sharing options...
Roman Posted July 16, 2015 Share Posted July 16, 2015 When cross sectional area is that big the airspeed is super low which is why i think no boundary layer visible at that scale. and also why bends dont seem to matter as much. Using a 20 micron surface roughness as a random guess. Link to comment Share on other sites More sharing options...
Stu Posted July 16, 2015 Share Posted July 16, 2015 All this flash calcumalationaries going on - pretty sweet! Just get a 4age... 1 Link to comment Share on other sites More sharing options...
Roman Posted July 16, 2015 Share Posted July 16, 2015 I'll get a 4age if Sentra Dave gets a 3SGTE. 2 Link to comment Share on other sites More sharing options...
Celica RA45 Posted July 16, 2015 Share Posted July 16, 2015 the k20 has rocker arms are you sure if you work out the ratio that they have the same as direct on bucket as in 260 to 320 duration or are you looking at the high cam and not the smaller 1 most cam on buckets are 1 to 1 ratio the k20 might be 1 to 6 ratio etc Link to comment Share on other sites More sharing options...
Celica RA45 Posted July 16, 2015 Share Posted July 16, 2015 and dave you can buy a kit that bolts to your rear end and you can re lower your rear trailing arms .they have 2 new positions for the traling arms to attach 2 Link to comment Share on other sites More sharing options...
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