miata2fast

iTrader: (2)

Why not a dedicated set of slicks for the track?

mx5psi

Maybe in future but at the moment cars are sending me broke

i think theese yokohamas will be more than my axels can handle has anyone tried the 400hp units from the drive shaft shop ?

patsmx5

iTrader: (16)

Can confirm these things stick.

miata2fast

iTrader: (2)

Damn the budgets. Slicks will be the best dollar you spend if you get the right ones.

You will find drag slicks are foregiving, even more so coupled with an auto trans. Don't worry about axles until you start breaking them.

mx5psi

It will happen its all a learning curve as iam not a seasoned drag racer

i think suspension will be equally important as well

im thinking about stich welding the door frame and solid mounting this hardtop before i go

miata2fast

iTrader: (2)

Suspension becomes important when you get really competitive, or when trying to get radials to work. Today's drag tires are really really good. I do plenty of drag racing, and experience has taught me there is no better investment than the right tires.

The key is choose wisely. Most people make the mistake of going too big. The right tire for a Miata will look shockingly small depending on power.

sonofthehill

iTrader: (1)

I am taking your advice and getting M&H slicks when I have a few more bucks.

patsmx5

iTrader: (16)

I run Mickey thompson ET Street R's, 225-50-15's on my setup. What do you think of those? They are bigger than stock. Seem to work best around 18 psi pressure.

mx5psi

what boost do you launch yours at pat

patsmx5

iTrader: (16)

Around 20-25 PSI with a manual transmission, RPM's vary from 4,200 to 4,800 depending on track conditions.

mx5psi

Ok maybe the drive trains stronger than i thought in my head 10-12psi max

my ultimate goal is a 10.99 but i dont know if 400hp and auto is enough

miata2fast

iTrader: (2)

I think all you need is the 7.5-23-15 for your power level. I think it will be capable of 60' in the 1.6 range. Going bigger will only slow you down on the big end.

I think it is a good tire, but drag radials are less forgiving and require a lot more suspension tuning, particularly with manual trans. Once you get it right, they are actually faster than bias tires. Are you getting wheel hop? I get none using bias ply.

my ultimate goal is a 10.99 but i dont know if 400hp and auto is enough[/QUOTE]
That is plenty of power to break in the 10's if you launch hard enough.

mx5psi

Productive day i got a mint condition hardtop with perfect seals and rubbers with frakenstien bolts and demister wiring cheap well cheap for us in oz

side latches are missing but my intention is to solid mount it

i also wired up my auto thermo fan to my unused fog light switch works a treat

mx5psi

my bluetooth module has arived so i can have music again




Has anyone thought about bumper cuts to reduce drag?

mx5psi

sorry about the video quality i will make more

tyres hook up well on high boost its so much more grip

patsmx5

iTrader: (16)

Finally a video!

Really looking forward to a video at wide open throttle going through the gears!

patsmx5

iTrader: (16)

With a manual it would cut low 1.7 60' times, but the reason for that was mostly to do with the clutch. I swapped to a puck clutch and choose not to slip it out of the hole as I knew that would destroy it fast. It would wheel hop if I tried to dump the clutch out of the hole over about 20 PSI or over 4,500. I could fix that with air, but it slowed me down on the big end. Drag radials are meant for auto cars, not manual, so it should be better now, though I'm sure it won't launch as well until I get a higher stall in it and whatnot. One thing at a time!

mx5psi

Bit worried about the converter at the moment went behind home put it on high boost and raked out third from 80kmh it sat at 6,800rpm and kept pulling like a train

if got a bad feeling converters slipping or maybe 3.63's are too tall for 80 in third

im new to this auto thing on a plus auto holds 25psi and grip

patsmx5

iTrader: (16)

Does it slip in all the gears the same under high load? Just wondering if it's the converter or the clutches in the trans slipping. The rear gears shouldn't matter.

mx5psi

i doubt it would be clutches the box is well rated higher and proven in much higher applications

iam going to put it on a friends Dyno tomorrow and see what power it makes and what the curve looks like i think we can work out converter slip with it i need to look it up