MT drag radial

Transmission to Rear-end

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A_VAS
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Re: MT drag radial

Post by A_VAS » Tue Jul 25, 2017 1:13 pm

i've run those same size 255/60/15 and also a 255/50/16 MT radials, at 18 psi and no screws.
I typically put a paint mark on tire and rim to see if it is moving...on the 16" rims I would see some very little movement, like 1/8" after 20 or so runs.
with the 15" I never saw any movement...figured maybe the sidewall deflected more and kept in place on the rim better.
I was also using a clutch and only turning 60' at 1.60-1.61 so I'm not sure if I was hitting the tire similar to your setup

actually I found a pic of the 16" setup....and it's even an Aussie car how bout that. with the 16" rim and 255 width the 60' were in 1.68-1.69 range
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too lazy to make power w/o boost

autogear
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Re: MT drag radial

Post by autogear » Tue Jul 25, 2017 4:15 pm

Thats a quick "Pontiac" you have there :)

AMXstocker1
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Re: MT drag radial

Post by AMXstocker1 » Fri Jul 28, 2017 8:55 am

steve cowan wrote:amx,
i went test and tune last night,it was very busy so i only managed 2 x runs
last meeting the car ran 11.42 with a 1.78 sixty ft tyres on 24 psi

last night
1st run 11.31 @ 120.94
1.72 sixty ft small burnout and 22psi in rear tyres wheel spun on startline
2nd run 11.100 @ 120.65
1.57 sixty with a bigger burnout and dead hooked of the line
at 19psi in the rear tyres
remember i am using the older M/T street radial
the pro radial is not legal here but can use the older style M/T
NEW 5600 EIGHT INCH CONVERTER FITTED THIS WEEK
i was only bringing up to 2500 rpm on the footbrake
Sounds like a good outing 1.57 60ft for your mph and weight is pretty much in the ball park, what converter is in the car now? and do you have a trans-brake?

steve cowan
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Re: MT drag radial

Post by steve cowan » Fri Jul 28, 2017 3:20 pm

Hey amx
Thanks for your reply
Just had a 8 inch 5600 stall done by
tce converters in Melbourne Australia
There service was excellent
They recommended that stall speed and I thought it was to high for a street driver
It drives really nice and has woke the engine up
Yes I am happy with the cars performance considered it has 10 passes on that engine that started at 12.5 @ 114 MPH with carb issues
Steve C

steve cowan
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Re: MT drag radial

Post by steve cowan » Fri Jul 28, 2017 3:21 pm

No transbrake
No two step
Full street trim

autogear
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Re: MT drag radial

Post by autogear » Mon Jul 31, 2017 11:20 am

Its amazing what a custom torque converter can do for an application. Thats a hard charging car. And you deserve credit as a driver too.

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Re: MT drag radial

Post by steve cowan » Tue Aug 01, 2017 2:13 pm

i just purchased a set of koni adjustable shocks for the rear,i wont run them this weekend,it will be next month street points series
i found out that the jesel belt is on the the loose side and retarding the ignition timing by three degrees( i posted this as a different thread a while back)
so i put an extra three degrees in the cam timing to hopefully compensate for this and going to run a points deal this weekend
hopefully with that little tweak,tyre pressures and stall speed off the start line i can maybe get that 11.00 something
fingers crossed
steve c

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