anthony1956 Posted October 11, 2019 Share Posted October 11, 2019 Why don't we do the hole in the bonnet anymore for all that yummy "cool" air instead of spending stacks on air boxes and tubes etc? I have long wondered and blow me,, someone on here just did the hole cutting thing. (Sorry forgot you) anthony Link to comment Share on other sites More sharing options...
CageyH Posted October 11, 2019 Share Posted October 11, 2019 Induction noise would be my guess. Link to comment Share on other sites More sharing options...
anthony1956 Posted October 11, 2019 Author Share Posted October 11, 2019 I like induction noise Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 11, 2019 Share Posted October 11, 2019 Depends what your engine requires...... mine simply wouldn't fit under the bonnet with the inlet length required.95% of my filter is external Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted October 12, 2019 Area Representative Share Posted October 12, 2019 Same....an airbox with inlet tube would not work for my R400D RBTB. Big hole in bonnet, fat filter, lots of induction noise.Just depends on the application for the particular model.On my last car a 1.6K Supersport with Jenveys I managed a GRP plenum box with intake tube & filter on the offside. Link to comment Share on other sites More sharing options...
anthony1956 Posted October 12, 2019 Author Share Posted October 12, 2019 can we see some pics? sounds lovely Link to comment Share on other sites More sharing options...
John Vine Posted October 12, 2019 Share Posted October 12, 2019 can we see some pics?This is mine (with RBTBs). I suspect Geoff B's is much the same.JV Link to comment Share on other sites More sharing options...
anthony1956 Posted October 15, 2019 Author Share Posted October 15, 2019 That's what I want. I worry about how to get the hole correct and what happens in inclement weather Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted October 16, 2019 Area Representative Share Posted October 16, 2019 You could purchase a new bonnet? Mine is an R500D bonnet - label on inside still attached. Cut the hole out using a template then use edge trim? There must be a suitable template available in Blat Chat land. As to inclement weather the Pipercross filter is synthetic & resists moisture ingress. Rain through the cut out is very limited. It lets in more road dirt & flies than anything else! Link to comment Share on other sites More sharing options...
John Vine Posted October 16, 2019 Share Posted October 16, 2019 Mine was cut by CC when they fitted RBs. The bonnet was new as the car was in for some chassis/body repair work (which needed a new bonnet).JV Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 16, 2019 Share Posted October 16, 2019 Cant beat a little water injection to boost the power..... Link to comment Share on other sites More sharing options...
anthony1956 Posted October 16, 2019 Author Share Posted October 16, 2019 Good point, CC may be able to cut a new bonnet to suit as they have all the specs. Link to comment Share on other sites More sharing options...
SM25T Posted October 17, 2019 Share Posted October 17, 2019 CC retaining details of stuff on a car from 2000 !! When my car was only 5 years old, they couldn't tell me what the sump plug thread was. Link to comment Share on other sites More sharing options...
Wrightpayne Posted October 17, 2019 Share Posted October 17, 2019 Arch might be a better port of call...I’m sure the ‘official’ bonnets with cut outs (eg crossflows) have a nice rolled edge which gives a bit of extra rigidity.Ones cut to fit a particular install just have a plain edge. Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted October 17, 2019 Area Representative Share Posted October 17, 2019 Yes the factory bonnets have a rolled edge to the aperture.In my opinion the standard 'universal' aperture is too large for the Pipercross filter but for expediency it was created to accommodate the optional R500D CF intake box. I am sure that careful cutting with a Dremel disc would produce a reasonably good finish if you have a VERY steady hand...... Link to comment Share on other sites More sharing options...
anthony1956 Posted October 17, 2019 Author Share Posted October 17, 2019 no steady hand here.. Link to comment Share on other sites More sharing options...
anthony1956 Posted October 17, 2019 Author Share Posted October 17, 2019 Just spoken with Arch, no problem (of course).Raised an interesting point of interest, that there won't be any airfilter poking out of the hole, as it already is less high than those that do, defined by the fact the bonnet fits over it. Link to comment Share on other sites More sharing options...
SM25T Posted October 17, 2019 Share Posted October 17, 2019 So you could have a hole with a black mesh bonded on from behind. Link to comment Share on other sites More sharing options...
anthony1956 Posted October 17, 2019 Author Share Posted October 17, 2019 aha!thank you Link to comment Share on other sites More sharing options...
SM25T Posted October 17, 2019 Share Posted October 17, 2019 Thus positioning and size of hole not quite so critical. Would of course allow more sound to escape into that controlled and certified mountain air ! Link to comment Share on other sites More sharing options...
anthony1956 Posted October 17, 2019 Author Share Posted October 17, 2019 thoughts about rain ingress? Link to comment Share on other sites More sharing options...
SM25T Posted October 17, 2019 Share Posted October 17, 2019 It will indeed ingress !! It wouldn't be a hole otherwise ! Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 17, 2019 Share Posted October 17, 2019 Link to comment Share on other sites More sharing options...
anthony1956 Posted October 17, 2019 Author Share Posted October 17, 2019 oops Link to comment Share on other sites More sharing options...
SM25T Posted October 17, 2019 Share Posted October 17, 2019 We could cut a hole .... very carefully. If we are really careful, we could use the piece we cut out, to fit back into the hole to stop the rain getting in !! Link to comment Share on other sites More sharing options...
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