Everything posted by j1mmytt
-
Tyre pressures....getting them right
just for proof, does this look like the tyre walls are folding over on the edge? I think not, and this is at full lean as you can see the sideskirts are almost touching the ground lol
-
Tyre pressures....getting them right
Ok now i can say i completely disagree, to begin with you propably dont realise a track tyre has very hard sidewalls very different to a road tyre they are also a fatter profile than what im using on the road, and also the higher the pressure the quicker it heats up forget about sidewall temperature for a minute and think about the centre of the tyre and what its doing, also the negative camber i am running which is 2.5degrees which means when leaning into the corner the tyre remains more flat than leaning onto the outside wall of the tyre so im using more of the tyre and not wasting the insides like a road setup. Now i did start of with about 35psi but they got too hot and i had to reduce pressure, if i show you the wear pattern you will see that they are wearing evenly across the tread which is what you want, i probed the tyres and they were also pretty even temp from outside in, i bet if you used your car how it is now you would notice excessive wear on the outsides of the tyres while the insides remained pretty new. ok now read this taken from toyo tyres. The pressures you use will initially depend on the weight of the car, too little pressure on a heavy car can lead to over deflection of the tyre and subsequent failure. Below are some basic settings: VEHICLE WEIGHT COLD PRESSURE HOT PRESSURE Very Light Light 800kg - 1000kg 20 - 26 psi 24 - 32 psi Heavy 1000kg - 1400kg 23 - 27 psi 28 - 40 psi Very Heavy > 1400kg 27 - 35 psi 37 - 40 psi As a tyre gets hotter the pressure increases, this is due to the moisture in the air. The cold pressure you set to achieve a desired hot pressure will depend on the conditions on the day i.e. ambient and track temperature, wet or dry. If the day/track is cold you will need to start with a higher cold pressure as the tyre will not get as hot therefore the pressure increase will not be so great. Hot pressures must be balanced side to side. Once the tyres have cooled you will find that you will have a difference in pressure side to side, if you have been racing on a right hand track you will find the offside pressures will usually be higher than the nearside. Changing hot inflation pressures by small amounts can be used to fine tune handling. Reduce Oversteer Reduce rear pressures or increase front pressures Increase Oversteer Increase rear pressures or reduce front pressures Reduce Understeer Reduce front pressures or increase rear pressures Increase Understeer Increase front pressures or reduce rear pressures Achieving the required tread temperatures will depend again on the conditions on the day i.e. ambient and track temperature, wet or dry. You often here competitors saying “My tyres started to go off towards the end of the race”, this is usually due to the tread getting to hot. Basically williyo your getting mixed up, the less pressure the less the surface tyre patch heats up vise versus.
-
Tyre pressures....getting them right
on the track the temp of the tyres are way beyond normal running temps unless using nitrogen the pressures can raise from 3-8psi meaning instead of being 30psi they are now 35 or so. You cant just put pressures down to a bog standard pressure you have to try and test them too see what works best for you, read my first post.
-
thinking of making my own hicas eliminator, any tips or ideas?
oh yeah the eliminator bar wont eliminate any play in the joints lol you will still have to use the stock arms if you make or buy just the eliminator bar :(
-
thinking of making my own hicas eliminator, any tips or ideas?
measure the rear hicas rack length, then fabricate it from stainless steel so you can weld brackets for it to be bolted on, then you will need to thread both ends for the arms to screw into ;) canbe done, just seems easy to buy one, way less hassle imo.
-
license plate for 99 spec bumper.
yeah i got one of those and i still havent stuck it on yet.....
-
Wheel offset question
fronts will stick in a bit, rears will be tight. you might wanna use a 265/35/18 as the 40 profile will be a bit fat.
-
license plate for 99 spec bumper.
Whats a licence plate?
-
Tyre pressures....getting them right
I will be trying this one day :D
-
Tyre pressures....getting them right
They were r888's tho?!?!?! they heat up very quickly, pressure went up to 45psi lol
-
tiny tiny paint blisters?
hmmm might be screwed :( cant think of anyway the moisture can escape....
-
Tyre pressures....getting them right
lol forget forza i been testing it out for real :D I had to much pressure at one point and the rear tyres over heated, the rear was all over the place almost hit the grass a few times, so pulled in and reduced pressures. had a temp probe and everything.
-
daft question no# 00212133424
smaller compressors for quick spool but give out lower pressure basically you get no turbo lag so nice power low down the revs as diesel turbos dont rev much anyway. but exactly the same as any thrust bearing turbo layout.
-
Tyre pressures....getting them right
so what bout tyre types ie soft/hard , side wall stiffness, hot and cold pressures and rear/front weight, more or less understeer. the more pressure the less surface area but you get less flex and more response the tyre also warms up quicker with more pressure, the other way round with less pressure you get more surface area more grip but more flex and less response and takes longer to warm up (unless of course using nitrogen instead of air.), there are loads more factors, i think it depends what you want from your tyres if it be fast road, high wear rates or even track use. you cant really put it down to a certain pressure setting, imo anyway. On the track i had to set my pressure at 24psi which then when hot shot up to about 32psi.
-
Attaching images
i am indeed :D
-
Attaching images
paper clip or some bluetack works for me :D
-
Hicas removal
I have the DW kit and kept the TT pump and removed the hicas ecu, it will feel very different in a good way trust me ;)
-
Engine rebuild black smoke rev'd
if its an aftermarket regulator presently on the car you can use a fuel gauge and set the pressure to 40psi this is the stock settings.
-
Engine rebuild black smoke rev'd
Running rich will bore wash it slowly.... so u have some time :D but its best not to run it like that, get it on a wideband and see how rich it really is.
-
Engine rebuild black smoke rev'd
thats a fueling issue. could be the regulator, there is only one, the other which looks like one is actually a fuel damper. Did you happen to fit uprated injectors without changing the ecu? when you say overun sounds like antilag you mean its backfiring off throttle down hills etc? duno why this is but fuel must be injecting off throttle which is strange coz the stock ecu doesnt allow this, standalone ecus have the option of injecting fuel on overrun tho. pssshhh i duno.
-
Photo session VERY pic heavy.
Last couple engine shots....
-
Photo session VERY pic heavy.
jesus christ,,,,,, ha ha ha ha your still alive, still alive? ;) Cheers vincey boy :D
-
Photo session VERY pic heavy.
sticker has been there from when it left the factory. Yes i think i need another rear number plate which fits :D thanks everyone for the kind comments, makes me feel proud :D
-
Photo session VERY pic heavy.
very soon andy, next meets just up my road :D
-
Photo session VERY pic heavy.
Thats a perfect job there, your skills are so good, you sure thats not real? :P