GARDRB Posted March 27, 2022 Share Posted March 27, 2022 On 26/03/2022 at 23:35, Roman said: A++ will attend again on suitable tyres Queue @Roman showing up on rally tyres Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 28, 2022 Author Popular Post Share Posted March 28, 2022 Definitely not joining this group. Definitely not. 2 10 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted March 28, 2022 Share Posted March 28, 2022 2 hours ago, GARDRB said: Queue @Roman showing up on rally tyres *tractor grips...... 1 Quote Link to comment Share on other sites More sharing options...
datlow Posted March 28, 2022 Share Posted March 28, 2022 Probably more ride on sized ..... Quote Link to comment Share on other sites More sharing options...
Stu Posted March 28, 2022 Share Posted March 28, 2022 Please enter this in dirt drags... 1 Quote Link to comment Share on other sites More sharing options...
Willdat? Posted March 28, 2022 Share Posted March 28, 2022 5 hours ago, Roman said: Definitely not joining this group. Definitely not. Our local car club spotted this strategy so banned anything Rally or M+S. 7mm tread supercats hook up pretty well and will last 17 seasons... 2 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted March 28, 2022 Share Posted March 28, 2022 5 hours ago, Roman said: Definitely not joining this group. Definitely not. Gave 6 near new 15 inch rally tyres away late last year. Probably would have been a bit tall with regards to clearance though.. I reckon @vivaspeed would have something in his stash unless he's had a decent clean out / burn pile? 1 Quote Link to comment Share on other sites More sharing options...
kws Posted March 28, 2022 Share Posted March 28, 2022 I think i've heard somewhere that rally block tires arent allowed at some events because of the damage they do to the surface? 1 Quote Link to comment Share on other sites More sharing options...
vivaspeed Posted March 28, 2022 Share Posted March 28, 2022 @Roman you’re not allowed to use rally tyres at TECT park for autocross or motorkhana. Find the cheapest open block tread pattern you can find. I’ve got some cheap GT radials with big open tread pattern. Terrible as a road/tarmac tyre but ideal for the loose stuff. 1 Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted March 28, 2022 Share Posted March 28, 2022 Back in my day, everyone was using those mud & snow tyres that come in on jap cars, are they still a thing? 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 28, 2022 Author Popular Post Share Posted March 28, 2022 I went to pick a part takanini today, while I was up in Auckland for work. There was a fairly intact (auto) vitz RS there. Scabbed the RS type front bumper and grill, as these usually sell straight away or are already gone when the car comes in. Not 100% great condition but fixable. Will likely pass these on to a friend who's RS front is pretty beaten up. At least thats my justification for hoarding at the moment. While there, I thought I'd have a dig through the tyres and see if I could find anything with big chunky tread blocks for cheap autocross goodness. I didnt find anything good. However this got me sidetracked to go looking for any cars that had 13" alloys on them to find something to run on the back when at the drags. Surprisingly I actually found heaps! Every set I found, I tried one of them on the Vitz RS. But none of them would clear the brakes. So no chance of 13" all round, unless I go back to the smaller front brakes. But they'll all fit over the rear drums, so long as I never bother doing the rear disc conversion. There were a few different styles but I was stoked to find these, because they look a similarish style to the lensos I'll have on the front. Will look considerably less gumby than mismatched 14s on the back. Hopefully they're lighter than my other current rears as well. Happy with that. Also, BMW throttles turned up today. So I've measured them up, and the dimensions are looking really bloody good for a 1NZ. These are advertised as having 48mm throttle plates. Which is true but they are tapered housings from start to finish. So the exit is a 45mm wide by 43mm tall slightly oval shape. Then 53mm ID at the entrance. Modelling them up, it will work out awesome! This is a comparison of intake runner cross sectional area, for both sets of throttles. Will be interesting to see if the nicer taper gives any benefits. I'm out of filament at the moment but as soon as I've got some more, and got another small print job out of the way, I'll bang something out and see how it looks. exciting! #NoExhaustProgressYetAgain 13 2 Quote Link to comment Share on other sites More sharing options...
deankdx Posted March 28, 2022 Share Posted March 28, 2022 7 minutes ago, Roman said: While there, I thought I'd have a dig through the tyres and see if I could find anything with big chunky tread blocks for cheap autocross goodness. would it be worth getting a regrooving tool on some simple ish tyre designs. the speedway guys i used to sell my panels to(when i'd buy a car wreck for an engine/box etc) used to always use retread tyres because A: they were cheap, B: the rubber was softer and C: the tread design was kind of aggressive (at least the style they were buying was) but they also did groove them also a bit from memory Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 28, 2022 Author Popular Post Share Posted March 28, 2022 Hmmm nah I dont think I'll bother going that far. Literally just any tyre that has actual tread will be a vast improvement haha. I weighed the 13s for the rear and they were about 9.5kg each which is incredible For context my 14" wheels I took off were 15kg each. ROH and R888s were 17kg each so nearly double! I might put smaller brakes back on the front, and go get the other pair of these and run 13s full time. I drove it down to the dump in drag spec tyres, but with passenger seat still in and quarter tank of gas. Came in at 810kg which is awesome. So 790ish drag spec once passenger seat is out. 18 4 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted March 29, 2022 Share Posted March 29, 2022 20 minutes ago, Roman said: So 790ish drag spec once passenger seat is out. 200kg lighter than my ek civic which has minimal interior, door side intrusion removed, no heater etc.. There is of course some additional weight in the rollcage. 2 Quote Link to comment Share on other sites More sharing options...
Popular Post yoeddynz Posted March 29, 2022 Popular Post Share Posted March 29, 2022 19 hours ago, Willdat? said: supercats They also squeal most superbly on tarseal with the minimum amount of effort. Which creates many dirty looks from walkers and cyclists on twisty roads even when you're not even driving very fast. 3 7 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 29, 2022 Author Popular Post Share Posted March 29, 2022 Okay so apart from the fact I drew the flange backwards so the two outer bolts wont go in. HOW GOOD IS THIS! It's amazing how well it all fits up. 1NZ port spacing is like 83.33mm x 3 These are approx 83-82-83 and looks way tidier. I also think I've got more room for trumpets compared to before, so I can have a bit of a gentler curve in them if needed. Gonna be awesome! 26 5 Quote Link to comment Share on other sites More sharing options...
shrike Posted March 29, 2022 Share Posted March 29, 2022 Did these end up having dual injection bosses? Probably not useful for your setup however? Dual injector setup probably wouldn't be of any benefit as most bigger injectors have good low end control Part of me wonders if small injectors for lower end would give better control/results and then a larger set as you need more fuel but tipping you don't need huge injectors anyway Keen to see cruise control and other cool DBW stuff setup (cold start/idle/launch control etc) Wonder how they would go on a 4/7/9A Quote Link to comment Share on other sites More sharing options...
tortron Posted March 29, 2022 Share Posted March 29, 2022 2nd injector for methanol? 3 1 Quote Link to comment Share on other sites More sharing options...
Roman Posted March 29, 2022 Author Share Posted March 29, 2022 Yeah the factory setup has dual length intake runners in the airbox (top half of the runner lifts off) and then also two stages of injectors, the normal ones which you can see the holes for there, then a second set which is inside the airbox and sprays into the trumpets. However it's unlikely I'll be pulling enough rpm to see any tangible benefit from it, and from past experience it causes more problems than it's worth. Second injectors for a second fuel though like methanol. sure. haha 4 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted March 30, 2022 Share Posted March 30, 2022 What's the bore size on these? Do you know of any similar fbw itb setups that run really small bores? Like 35mm thereabouts. Quote Link to comment Share on other sites More sharing options...
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