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Post by Zed. on Apr 14, 2019 16:03:50 GMT
I've been looking into playing at a few sprint & hillclimbs locally (Pembrey & Epynt are ~30-45 mins away) and am trying to decipher the regs & rules  licencing shouldnt be a problem, I've held the 'non-race' national B on&off for the last 25+ years for rallying so (hopefully) no ARDS worries but that does mean paying the 'Motor-sports-Assasin's' licence fees  I've been trying to decipher the blue-book & had a look at the Welsh Assocciation's SR's wshc.wamc.org.uk/images/pdfs/supplementaryregs/2019wshcregs.pdf and ' think' they suggest Class 3B : Modified Series Production Car Class 1401cc to 2000cc so blue-book Technical Regulation (S) 12. I think?  so... whats the actual safety regs? ie. rollcage / seat / harness / ppe (helmet / overalls?) / battery cutoff & extinguisher? or am I looking in the wrong place  I'm intending to visit a meeting of the Welsh Sprint and Hillclimb Club (luckily the meetings are held ~15 miles away so no roadtrip) to find out about the legalities but thats not untill next month ao any ideas or advice from competitors is welcome  Rich. |
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Post by Horney on Apr 14, 2019 17:41:37 GMT
Your car road going with carpets etc?
If so you need suit, gloves, helmet, yellow battery earth lead, sticker for ignition switch and clearly marked tow eyes.
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Post by Zed. on Apr 14, 2019 18:08:50 GMT
Your car road going with carpets etc? If so you need suit, gloves, helmet, yellow battery earth lead, sticker for ignition switch and clearly marked tow eyes. presumed those, forgot about the tow points (red paint to the rescue  ) carpets are sorta there for show  also wondering on car spec, if I read correctly, it's sorta open as long as the origonal engine type is retained? and maybe origonal seatbelts but harnesses are allowed rollcages are a disaster area but thats another story Rich. |
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Post by howardb66 on Apr 15, 2019 6:58:00 GMT
What Horney says above/\
Check out the roll over protection requirements for modified classes... as you say, cages are a can of worms.
If you have a roll bar (which is only advisory in road going) make sure there’s a barrier between the boot & cabin. Most people (me included) cut the parcel shelf panel to fit the bar, you just have to reinstall some kind of fireproof barrier. I used an old printing plate (about 1/2 mm ally & filled the void with firefoam) Oh & some silver tape on the rubber fuel lines thru the boot from the filler to tank.
Much easier to stay in road going. You’re right, original engine but induction, brakes etc are free.
You need a non-race National B licence. No medical or ARDS tests required.
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Post by howardb66 on Apr 15, 2019 7:27:01 GMT
Just had a look at the regs for what you’re thinking of. Are you staying NA or will be FI by then? If the latter, you might have your work cut out as there’s no separate 4WD class...
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Post by Zed. on Apr 15, 2019 9:54:26 GMT
Just had a look at the regs for what you’re thinking of. Are you staying NA or will be FI by then? If the latter, you might have your work cut out as there’s no separate 4WD class... I'm staying NA (in an NA?) as I'm concentrating on the car not powah - I do have a merc / eaton supercharger but still undecided..... buying a plate lsd & sorting the 6" to 7" driveline is high on my priorities (already have a Kia 4.778:1 cwp, maybe 2), I'm also looking at a multiplate clutch - this is complicated as to use a Mazda gearbox I've only 1 source of plates (USA) but I have a Sierra based Tran-x 5speed sccr gearbox & the clutchplates are easily available locally also looking at a bias pedalbox - hence the road-modified as I guess its not a standard car after that Rich. |
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Post by howardb66 on Apr 15, 2019 11:07:43 GMT
A Torsen with a 4.7 is perfect for NA+NA, I know some one who has a clutch diff in his & it understeers like a pig: It’s an expensive way of going slowly... A load of torque is needed to make a clutch diff work. Have a look at the blue book section S before you go spending your hard earned cash. No point in doing loads of work then being at the back of the field. www.motorsportuk.org/News-Publications/Publications/Yearbook |
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Post by Zed. on Apr 15, 2019 11:36:32 GMT
I know some one who has a clutch diff in his & it understeers like a pig: It’s an expensive way of going slowly... A load of torque is needed to make a clutch diff work. I don't have a 7" diff so need to buy, I like plate lsd's & set them 'slack' so they can grip when needed (also, easier to drive as opposed to pushing-on or sideways everywhere!) I'm not a fan of torsen / quaife / blackline type diff's as I believe they are just an overcomplication of an 'open' diff - especially when you lift a wheel reading the blue-book is always fun, I believe that nobody knows the rules fully and individual scrutineers interpret diferently! a good friend is a scrutineer (rally) & I'm going to bend his ear for ideas as I said above re. possible spec & modifications, I'm not building untill I know if it's usable (maybe, but just a fun roadcar?  ) although I'm looking at the possibilities..... Rich. |
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Post by sandys on Apr 15, 2019 23:41:12 GMT
My experience of a clutch diff is not understeery but it will depend on its setup and how you drive it, can't say it slowed me down at all, quite the opposite.
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Post by apextwin on Apr 16, 2019 8:20:27 GMT
Kaaz plate diffs come set on 100% locking from the factory. This prob explains the person in questions understeer. Setting the clutch plates to a more sensible 33% setting will rectify that Id imagine.
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Post by sandys on Apr 16, 2019 11:47:25 GMT
They can often come set 2 way which is full locking, mine did, I changed mine to 1.5 rather than turn clutch plates, you can also adjust ramp angles to suit requirements, give less understeer then due to reduced lock up on deceleration. Normally you can unbolt housing and set what you need with 90 degree turn or if modular a new cam ring  can't wait to get back out there, not driven competitively for a while, having a little go a clay pigeon this weekend, will be interesting to try my new nutter clutch, lets hope I can manage down shifts with something so aggressive or there will be lots of spins on my future. |
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Post by apextwin on Apr 16, 2019 13:38:25 GMT
Educational video!
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Post by howardb66 on Apr 16, 2019 20:14:59 GMT
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)
) although I'm looking at the possibilities.....
le sigh