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Post by batou on Nov 17, 2020 19:49:22 GMT
I want to keep the standard arches and body line so I can still get into the standard hillclimb categories. A 225/45/15 tyre on a 9" wheel is the biggest tyre you can put on a 5 with the standard arches, without work on the arches or silly camber. The 9" 6UL is et 36, which doesn't need any special camber or arch pulling or anything. You need to fold the tabs back on the front but that's about it. A 225 tyre on a 9" is faster than on an 8", the tyre moves around too much on an 8. On a 10", there's too much stretch and it gets slower again. My 7.5" wheels with 195 tyres gets the same effect, 195s are faster on a 7.5" than on a 6.5" or 7. 195 on an 8 is slower because of the stretch. Obviously that's all for track speed and ultimate performance, but I like to plan for the times I made it to the track Russell Ahh this is all coming back to me now, this is exactly why on my last car (MINI R53) I was running a 215/45 on a 16x8" when everyone was telling me wider and lower profile = better. I wanted a little bit more side wall to hit kerbs without putting too much shock through the suspension and driveshafts as I was going through them like brake pads at one point. I'd previously ran a wider tyre and you could feel it move around too much so went down to a 215 and it instantly felt more responsive without any compromise in grip. So ideally a 195/50 on a 7.5J or, if I did go 8, a 205 would be about right, I mean I don't want maximum outright grip mind but somewhere in the middle of aesthetically pleasing and functionaly optimal would do. Good to know there isn't much faff for 9" +36 on a 225/45, are you still running the arch liners or have they gone? I was looking 7.5" +26 on a 195/50 which puts it around 9mm more arch clearance I think. Do you have any pictures of this setup?  |
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Post by Vindi (Russell) on Nov 17, 2020 20:49:39 GMT
For a balance between performance and useability / cost, a 195 on a 7 or 7.5, or 205 on a 7.5 or 8 is about as good as it gets.
There are some pics of my car at Rockingham on the first page of this thread with the 9s on, I should have more somewhere from when I had them. I was running 225/45 R888s.
The arch liners were still there in mine, some people remove them but I was still using mine as a daily at that point.
I know a few guys in the US have squeezed 245s under the standard arches but I think they had to roll & pull them a bit
If you like the idea of 9s, the 6ULs are not being made at the moment. Rota did a 15 x 9 et36 wheel, but I'm not sure of it's still available. There are a bunch of options in the US ... the IMS wheels look like a superb track option, basically an RPF1 copy but fairly light, and in 15 x 9 et32
Russell
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Post by Vindi (Russell) on Nov 17, 2020 20:59:23 GMT
Found a few pics ... When first fitted, I lowered it a bit after testing them for a few weeks  About a year later, 2nd set of tyres just fitted  At Rockingham, under fairly hard cornering  Russell |
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Post by batou on Nov 17, 2020 21:06:34 GMT
For a balance between performance and useability / cost, a 195 on a 7 or 7.5, or 205 on a 7.5 or 8 is about as good as it gets. There are some pics of my car at Rockingham on the first page of this thread with the 8s on, I should have more somewhere from when I had them. I was running 225/45 R888s. I know a few guys in the US have squeezed 245s under the standard arches but I think they had to roll & pull them a bit If you like the idea of 9s, the 6ULs are not being made at the moment. Rota did a 15 x 9 et36 wheel, but I'm not sure of it's still available. There are a bunch of options in the US ... the IMS wheels look like a superb track option, basically an RPF1 copy but fairly light, and in 15 x 9 et32 Russell I think 9s might be a bit much for where I want to be as its a road car I might put on track for a couple of sessions (not something I turn up and beat on all day at an OPL format). In the pics you suggested they don't look that lairy as I expected from those angles, thats suprising! Mainly I'm frothing at the mouth at the cheapness and options tyre wise. AD08Rs at £60 a corner... yes please  . I ran Rota grid-v's on my old track car, good wheels for the money and served the purpose but not exactly light and the finish on them didn't last well. I'm planning options from Work, Volk, Wanatabe or enkei, BBS Mahles on the cheaper end for this build if other things don't don't get in the way money wise . |
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Post by Vindi (Russell) on Nov 17, 2020 23:19:52 GMT
Cost is a big part of why I ended up on 195s on 7.5", there aren't many options for 225s and they start at around £140 a corner
Russell
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Post by Zed. on Nov 17, 2020 23:32:53 GMT
there aren't many options for 225s and they start at around £140 a corner be cheaper to run slicks  Rich. |
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Post by Vindi (Russell) on Nov 18, 2020 9:53:30 GMT
there aren't many options for 225s and they start at around £140 a corner be cheaper to run slicks Rich. They're not road legal though, this was my daily Russell |
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Post by Zed. on Nov 18, 2020 10:36:11 GMT
be cheaper to run slicks Rich. They're not road legal though, this was my daily Russell by 'slicks' I'm refering to rally legal 'racing' tyres, they've got the ~17% tread (or whatever it is?) for road-legality & are just about as legal as can be argued  also look similar to yoko / nankang / hankook performance tyres tread wise.... Rich. |
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Post by scottydugg on Nov 18, 2020 10:36:18 GMT
I'm not feeling so bad about my 195 on 7's, certainly interesting wheel/tyre chat.
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Post by Vindi (Russell) on Nov 18, 2020 10:37:09 GMT
They're not road legal though, this was my daily Russell by 'slicks' I'm refering to rally legal 'racing' tyres, they've got the ~17% tread (or whatever it is?) for road-legality & are just about as legal as can be argued also look similar to yoko / nankang / hankook performance tyres tread wise.... Rich. As far as I'm aware, they don't exist in a useful size Russell |
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Post by Vindi (Russell) on Nov 18, 2020 10:40:15 GMT
I'm not feeling so bad about my 195 on 7's, certainly interesting wheel/tyre chat. Honestly it's pretty much the sweet spot. I'll certainly grab a set of 9" 6ULs if any come up for sale but in the real world they don't make that much sense. 195s are common, so there's lots of choice and they're cheap to replace. Once my car has a load more power I might need to rethink it, but for now they're perfect for me Russell |
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jon
Chats A Lot
Posts: 270
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Post by jon on Nov 18, 2020 11:33:06 GMT
We are a bit scuppered for tyres in the UK - in the US there's all sorts of interesting performance road/trackday type tyres all the way up to insane widths.
Here there's a whole load of choice in 195s, 205s there's a couple of options, any wider and the price rockets and it's mainly dry trackday type tyres (r888s, semi slicks) which are legal but probably not good on a daily driven car..
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Post by batou on Nov 18, 2020 12:26:48 GMT
We are a bit scuppered for tyres in the UK - in the US there's all sorts of interesting performance road/trackday type tyres all the way up to insane widths. Here there's a whole load of choice in 195s, 205s there's a couple of options, any wider and the price rockets and it's mainly dry trackday type tyres (r888s, semi slicks) which are legal but probably not good on a daily driven car.. Absolutely this, why we don't get Direzza Star specs drives me mad. I prefer 14s for size if it wasn't for tyre choice. |
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Post by noobie on Nov 18, 2020 12:29:45 GMT
We are a bit scuppered for tyres in the UK - in the US there's all sorts of interesting performance road/trackday type tyres all the way up to insane widths. Here there's a whole load of choice in 195s, 205s there's a couple of options, any wider and the price rockets and it's mainly dry trackday type tyres (r888s, semi slicks) which are legal but probably not good on a daily driven car.. Prices shoot up in the US too. Well over 100$ for anything over a 205 but they do have a lot more choice. Brexit might fix that for you Brits, since it is a particular cancer-inducing rubber softener that the EU has outlawed that is causing the reduced availability. Not much point imho, available 195's will hit 95% of a 225s performance for 50% of the cost. Unless you are competing there isn't a sane business case to be made. |
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Post by Vindi (Russell) on Jan 19, 2021 19:33:31 GMT
Interesting times ... I'm gradually selling more and more parts that I didn't ever think I'd let go of ... partly to create space in my garage and partly to bring in some cash to get the V6 swap moving forwards.
The result of all the selling is that I placed an order today for a gearbox adaptor, flywheel adaptor and some Honda engine parts as well. That should (when they arrive) allow me to attach the J35 engine block to my 6 speed gearbox, and start mocking things up in the engine bay
I'm not getting too carried away with the engine at this point, but the J35 block and J32 heads should give me 260bhp. The tubular manifolds, Holley intake manifold and cnc machined runners should hopefully get me to 275? That's enough for now, although I've got a lead on some 12.0:1 pistons that might get me to 280 ish? It's guesswork at this stage, but I shouldn't be too far out
I've been speaking to quite a few people with the same conversion and have got a good combination worked out for the clutch and flywheel ... by all accounts the "uprated" setup Minitec sell isn't great, so I'll try a lighter custom flywheel and a different Honda clutch to the one they suggest to free up the revs a bit
I've also decided to sell the Mk2 RS engine and go straight into the V6 swap ... it's not like I'd use it if I put it on the road as a standard car anyway, I'm pretty much glued to my desk these days! Hopefully the engine & ecu, maxim works manifold, funky cam cover and ... yes, the Fujitsubo exhaust will go to someone that appreciates them. This will be the second Fujitsubo RM-01a exhaust I've bought brand new from 949 Racing, left in the box for a year and then sold!!
Russell
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. 
le sigh