BFG Drag radials, what pressure are U running?

[ROJO99]

I am hesistant to go below 25psi. I have 275/35/18's on my basically stock 99 C5. I average mid 1.9's with the occasional feakish 1.85's for the 60' times.

[REDGAR]

You 60's are very good for a basically stock c5.

I run 19 in mine which are 275 17's

[ROJO99]

My best 60' was a 1.808 which resulted in a 12.58 run. Sometimes a 3.5 clutch dump yeilds spinning thru 1st, and other times it bogs the motor. I am trying to do at least a 7 second burn-out. If I am feeling all macho and stuff I will hold 10 seconds or better and get the big plume going.

[robz]

Originally Posted by ROJO99

I am hesistant to go below 25psi. I have 275/35/18's on my basically stock 99 C5. I average mid 1.9's with the occasional feakish 1.85's for the 60' times.

I've gone down to 15psi with bfg's 315 35 17's with no problems.

[ROJO99]

At 15psi and the tire being a "radial" is this counter productive due to the tire contact patch is now concave in relation to the pavement?

[Greybeard ZR1]

The lowest I've gone is 20lbs. Which yielded a 1.74 60ft.(stock motor) Real low pressure can give you some real spooky handling, watch out.

[Pete K]

18 psi warm works for me.

[C5 CU]

16lbs, 295/18....4000rpm clutch dump with a little spin gets consistent 1.70.

[robz]

Originally Posted by ROJO99

At 15psi and the tire being a "radial" is this counter productive due to the tire contact patch is now concave in relation to the pavement?

Not sure but I was able to cut 1.5x's on a well prepped track with 15 psi cold.

[ROJO99]

1.5 is just . I do not think I will ever get that close with 318 at the wheels.

[Matt383]

When I use DR's I go with 18 lbs all day.
Matt383

[C5pilot]

I also use 19 psi in my 275 17's. Watch your 60' times along with tread wear when you think you're close.

[MikeNMaxZO6]

I run between 17.5 and 20. Seem to work for me.

[Mr Mojo]

You have to experiment, what works for us may not work for you. Too many factors involved.

But, I run 275/50R15's and have 22psi hot.