[grampa_ss]

So I need new DRs in an 18”. I currently run Nitto 555R in a 305/35/18. I’ll be switching to MT ET Street SS in either the
285/40/18 26.9” @29lbs
Or
305/35/18 26.6” @33 lbs

I like the 4lb weight saving of the 285. My question for you guys is will the 285 hold me?
Procharger on meth. Stock converter.

Thanks.

[mlee]

Good question... I've only had MT 305 DRs. Seems adding 8 lbs for a better 60' with 305's is the logical choice since track prep is not always great but maybe someone will chime in on 285's.

[6spdhyperblue]

Unless you’re driving in rain i strongly suggest the street r over the SS

Lighter, more grip, more flex when aired down, and doesn’t feel bad at all when aired up on the highway.

[95 imp]

It might be a little shaky with 285 dr's and knockin' on 10's door. The dr compound isn't as soft as slicks. Then there is track prep...

[grampa_ss]

Originally Posted by 6spdhyperblue

Unless you’re driving in rain i strongly suggest the street r over the SS

Lighter, more grip, more flex when aired down, and doesn’t feel bad at all when aired up on the highway.

The Street R is my preference, but they don't make it in an 18 that'll fit on my 18x9.5 wheel. This is for track only. I don't go to the track enough to justify buying 17" race stars. The closest track is over 400 miles away. For now, just going to stick with the 18s.

I found these too: Hoosier Radial Drag Slick 28 x 10.50R18 22lbs
I didn't think I'd need a slick since I only launch from an idle or so.

[grampa_ss]

Originally Posted by 95 imp

It might be a little shaky with 285 dr's and knockin' on 10's door. The dr compound isn't as soft as slicks. Then there is track prep...

I know all about track prep...rather the lack of. I just got back from a trip to Sacramento Raceway (650 miles each way). Hoping for some very low to maybe even negative DA. Only to find out when I get there that they do not prep the track at all for Wednesday night drags. I couldn't launch at all. Spinning all the way down the track. Rear coming out at over 100 mph. Scared the shit outta me.

I asked them whats up with the track prep. They said we don't prep for Wednesday fun night. You won't be setting any PB here tonight. They said come back on Saturday..full prep then. Grrrrrr.

[Evil-Bee-NH]

Yep most all dragways only prep for weekend test and tune and leave the typical Wednesday/Friday street nights without prep.

[95 imp]

Originally Posted by grampa_ss

I know all about track prep...rather the lack of. I just got back from a trip to Sacramento Raceway (650 miles each way). Hoping for some very low to maybe even negative DA. Only to find out when I get there that they do not prep the track at all for Wednesday night drags. I couldn't launch at all. Spinning all the way down the track. Rear coming out at over 100 mph. Scared the shit outta me.

I asked them whats up with the track prep. They said we don't prep for Wednesday fun night. You won't be setting any PB here tonight. They said come back on Saturday..full prep then. Grrrrrr.

Or, all the amateurs who run their street tires thru the box and drag water on the track.

Both are more than frustrating.

[wnta1ss]

As far as the S/S tires in a modest width, I have used the 275/40-17 ET Street S/S with a mild centrifugal supercharger setup (base pulley and no methanol injection kit). But it was hot out (82º and 91º the 2 times that I used that setup) so the pavement was hot, and these were weekend events during the day. Was able to get 1.6 short times and ran some 10.9s with trap speeds in the 123-125 area. I'm not saying that they are necessarily a great choice for a blower car, but I did 'get away with it' in a modest hp/hot track situation.

As far as drag slicks, I would avoid using them if you can, because they move your car to the drag race car rules, and you no longer would be covered by the 10.000sec new car rules. Drag race car rules would call for a roll bar under 11.50 ET and the slicks would also require a driveshaft loop. I've had a tech inspector tell me that you need DOT-stamped radial tires to stay within the 10.000sec new-car rules.

[grampa_ss]

Originally Posted by wnta1ss

As far as the S/S tires in a modest width, I have used the 275/40-17 ET Street S/S with a mild centrifugal supercharger setup (base pulley and no methanol injection kit). But it was hot out (82º and 91º the 2 times that I used that setup) so the pavement was hot, and these were weekend events during the day. Was able to get 1.6 short times and ran some 10.9s with trap speeds in the 123-125 area. I'm not saying that they are necessarily a great choice for a blower car, but I did 'get away with it' in a modest hp/hot track situation.

As far as drag slicks, I would avoid using them if you can, because they move your car to the drag race car rules, and you no longer would be covered by the 10.000sec new car rules. Drag race car rules would call for a roll bar under 11.50 ET and the slicks would also require a driveshaft loop. I've had a tech inspector tell me that you need DOT-stamped radial tires to stay within the 10.000sec new-car rules.

Thanks for the input. You're correct on the slicks. I didn't realize that when I first posted, so those are definitely off the table. Sticking with the 305's.

[KingLT1]

305's

[TheRealJA105]

Originally Posted by grampa_ss

Thanks for the input. You're correct on the slicks. I didn't realize that when I first posted, so those are definitely off the table. Sticking with the 305's.

I think the Hoosiers have a DOT stamp. My set of Hoosier DR2s do and i think the size you listed is called a DOT drag radial.