It's been a couple years since I've been to the track so I'm not sure if it's me or the fact that I was running a B16 transmission that had been giving me problems. I'm currently running Redline Mtf for the first time also and it seemed notchy, along with the fact that while in gear there is a lot of play with the shifter.The transmission is equipped with a Quaife also. I know slicks would help but my goal is 12s on street tires. I guess I'm here to see if there is anything else I can do before swapping the transmission out.

Setup-
93 Civic hb
Built b20vtec 491hp
B16 transmission with Quaife LSD
Ground Control coilovers
Neogens 205-50-15


Joe

 

Get more seat time, the trans is fine.

 

get your 60ft down

 

You're on 205 street tires that's your problem. You're running 250whp times with double that. Get some better tires.

 

What would be "better" tires (size wise)

 

get some 24.5x9x13 tires.

 

Unless you're after some record, street tires on a 500whp car is dumb. You run a huge risk of breaking driveline components over running slicks. If you MUST run them, drag radials or toyo r888 are your best options.

 

Do you have boost by gear ? I ran 12.5@130 on some Nangkang 205s but Im on wastegate pressure until the top of second gear.

 

Jockobo I do and I'm still in the process of getting it dialed in. I wanted to make some test hits because I haven't really taken it to the track on boost.

 

My goal is for a fast street car. Gonna buy some slicks next year but till then I'd like to get as fast as possible on DOT tires.

 

yea you need some slicks. I ran 11s with 375whp stock gsr.

 

It is still a street car but when you go to a dragstrip you are drag racing so you need the proper equipment. That's like me wearing dress shoes to the gym to play basketball so I know how would play with what I wear all day. No, you put on the right shoes. All you're going to do is go slow and break parts.

 

get slicks

 

+1 i ran 11.70 making 293whp on 24.5x9x13 with a b16 tranny.

 

Correct me if I'm wrong, but wouldn't running slicks/radials actually increase the likelihood of breaking driveline components? If the wheels are allowed to spin off the line it prevents the axles/trans from taking on all that load and energy as a sudden shock.

That's assuming he's not getting wheel hop though.

On an EG the widest street tires you can run are 225/45/15, and that's with rolled fenders all around.

Also, not to thread jack, but people with ~350WHP->400WHP and a b16 trans, are you having to shift into 5th in the quarter? What RPM/Traps are you getting if you're staying in 4th?

 

What kills the driveline is wheel hop, I never drove my car down the track with street tires for that specific reason. I ran on DSS stage 2.9 axles for 10 years, made over 900whp with them and ran mid 9's with those. I only started using the 5.9 end of last year.

I remember a couple years ago Locash ran a DOT street slick and the wheel hop was so back it destroyed a couple PPG gears and vibrated the crank pulley bolt out and messed a couple other things up. Street tires and way worse then using a good slick.

 

I run a GSR trans on 205/45/16 and basically have to shift into 5th and at the worst time about the 1000' mark. I have a set of 22/8/13 but have not used them yet, I hope I can run a much better time. I cut almost the same 60ft as the OP @ 2.2

 

I actually have to shift into 5th when I get a good pass otherwise I hit the limiter for a good half second with a 8600 redline.

 

10.40s on stock em1 b16 with quaife lsd here

 

You're shifting into 5th trapping only 112? 4th gear on a B16 with your tire size should be getting you into the low 120mph before redlining.

 

Yup. The highest I've trapped was 114. I have the tune from the tuner and the rev limit is 8600.

 

The zeal trans calculator says 8500 at the top of 4th would be 119 on a 205/50-15. Remember trap speed is the average mph AFTER you cross the finish line for 40 or so feet. If you are letting off right at the finish line your trap speed will be slower than your max mph in the 1/4.

 

Datalog the next run and upload it. That will be what we need to determine exactly what's going on.

 

I ran 11.7's at 115 on a 22x8 inch slick b16 tranny and never shifted to 5th.

 

What spring stiffness are you running? Since its a street car I'm assuming the spring rate is soft, that's killing the 60 foot time. Also a traction bar would help with your 60. Most street spring rates are around 8-10k, depending.

Just my .02