Went back over the pond tonight in hopes of an 11.99. Maybe you guys remember my last attempt at Grand Bend from my "Canadian Adventure" thread where I smoked my clutch on the very first pass. Anyways, since getting the McLeod RST in I went to Milan once, but just on my Invos and wheel hopped horribly to a 12.50 @ 117. Tonight I bolted on the 305/35/18 MT's and went back to Oh Canada! I will tell you guys right now I have a lot to go on my launch. I seem to not get back into the gas quick enough after I release the clutch and let it bog too much (demise of 2 of my runs!)

First pass- Wheel hopped AWFUL out of the hole (Forgot to change my coilover settings from my road racing set-up, oops!) Little anxious I suppose. I also proceeded to wiff 3rd to a stellar 12.8 @ 111.

2nd pass- Rode clutch a little too long but kept RPMs up okay. 1.9 60' 12.20 @ 117.97 (Best MPH to date and was a new current best ET)

3rd pass- Hooked but I didn't get into it quick enough and it bogged bad, run abort

4th pass- same ****

5th pass- got back into it barely in time and saved the launch I guess. 1.85 60' (Best to date) 12.16 @ 117 (New best ET)

We are getting there, I know with the right launch an 11.99 is in the car as it sits. It hooks great I just can't seem to get my right foot to lay the hammer quick enough! My car does have a lightweight flywheel in it which probably isn't helping this aspect of the situation but you can't have the best of everything to drag and road race I guess!
Also the car is strange with stock m6 3.42 gearing and my healthy cam with sky's the limit rev limiter.... I don't ever touch 4th. I used to HATE hitting 4th stocker right before the trap to shut down immediately. Well now with my cam making power higher and my limiter way up there, I can just ring out 3rd instead of just tapping 4th and shutdown. I see damn near 7k on the tach (who knows what it really is?) and you will see in my vid it is buried at 7k at the very end!

Enjoy and all tips, comments, thoughts are appreciated! Now we switch out the rear tires back to the R888's, tweak suspension a tad, and hit the road course next weekend!


-Jon

 

Nice vid. Sounds to me like all you need to do is deal with tire pressure to get rid of the bog

 

Nice Vid

I usually just put it in "drive" and leave it there

 

He needs a gear to get rid of that bog...M6 and 342s SUCK...if he wants to stay with that...then high tire pressure, higher launch rpm, and a smoother/slower clutch release will help some...but 1.85 isnt bad for minimal seat time with a clutch and that gearing

also a gear will be nicer so you dont have to do that holding 3rd gear until the stripe stuff and will put in your power band quicker and for longer

 

OP whats your launch RPM? what was the DA at the time of the run?

 

launch rpm was right about 5k, rpm's dropped to about 2k after the launch, you can sort of see the tach in the video I posted.

I can't find the track on the DA calculator site, bummer! Grand Bend Motorplex in Ontario, Canada

 

shifts look good. Only thing other than changing gears is slipping the clutch more. I would be happy getting a 1.85 sixty and bogging.

 

thanks! Yea the flywheel and gears hurt. Think a 3.90 or 4.10 would better suit my dual purpose strip/course car?

 

good job!!

hopefully you can get that 11 soon!!

 

Sounded real good.

Bog off the launch doesn't help, probably had an 11 in there if you can get past that. The gears don't help but more feathering of the clutch could help that a bit, it takes practice for sure.

If you're going to change gears this calculator is worth looking at...

http://www.xse.com/leres/bin/gearrat...diameter=25.21

I have 3.90s with the M12 trans so my gears are even shorter, I'm at the top of 4th going through the traps vs 3rd.

Do you plan on making the august Motown event at milan?

 

Gotchya, I am definitely doing a gear next, just have to pick which one now! I will try to make that rental, have to hop on over to motown and check the date and times!

The one weekend I could not do it, grr! We have our golf Invitational that Weds-Sat (11th-14th)

 

Also that calculator helped great! Looks like with my tires, a 3.90 would put me a hair shy of 6k at the trap and a 4.10 would put me about 6200.... both in 4th obviously, pending I still trap about 118

 

The launch looked good. You did alot of the things necessary to get the car out of the hole with your setup. I feel you can run the sub 12 pass with the current set up and same track/air conditions.

-I agree with Pit. With the same setup, I would start by increasing the air pressure by .5-1 psi at a time with the same launch technique and burnout and see if you can shave another .05 or better off your 60'. If your 60' doesn't get much better (it should), your 330' will, probably just enough to dip into the 11's. [You should experience a controlled spin so be prepared to keep the car straight on the launch].

-You can also tweak the suspension slightly to help with the 60. On that launch I would probably try one click tighter on the rears. Alot depends on track prep too.

-A third thing to try without changinging anything else is to bring the clutch up to the engagement point after you single bulb. Bump the car forward being staged and have the clutch pedal just below the engagement point ready to launch. If done correctly, you should bog less.

Next time go on a better air day for some cushionand always remember the "Golden Rule", only change one thing at a time. You are close. Have fun with it.

 

Enjoyed the video...

 

Big thanks Rob, I appreciate it! Will make another post next time I get there and try all of the pointers... one at a time though!

 

Also, do you feel my car would pick up a lot with a 3.90/4.10 or maybe just a little or maybe not much at all?

 

With your trans I think you'd pickup the most with the 4:10. Keep in mind even past your peak hp you probably still make good power. At that point you're pulling through your best power band vs crossing the finish at peak. I stumbled on that calculator over the winter and it too helped me a great deal when choosing my new gear.

I can't say how much you would gain, I never had a chance to run my car beforehand and did the gear when I put in a new clutch. Even with 500whp my car felt like a dog shifting into 4th gear with the 3.42 until about 130mph, which I rarely see those speeds.

You will lose some mileage, specifically on the highway but not much. My gauge fuel/mpg gauge used to read 32mpg, now i sits at about 29. I'd get a real average if I had willpower to run through a tank without my foot to the floor.

Since you can't make the motown rental when can I stop by to pickup those drag radials? I'd like to try and break into the 10s jk

Edited to add:
When choosing a gear keep in mind your future power goals. If you choose a gear and add a lot more power, you'll find yourself shifting into 5th. I keep thinking about nitrous now, however if I had planned on going that route I probably should have gone with a 3.73. Although I could also change ratio by altering going with a taller rear tire for the track setup so.. there's always options.

 

Swing by and borrow the drag radials/wheels, no joke! Just make sure you return them!

I have (2) of the 18x9.5's up front with 275/35/18 Toyo R888s that I run up front for the road course AND drag strip. I have (2) 18x10.5's with 305/35/18 MTs for the drag strip and (2) 18x10.5's with 305/35/18 Toyo R888's for the road course. So a simple rear wheel change is all I need to swap for the different racing! I will have the toyo's on next weekend as I will be going to Grattan and will not be racing that weekend so feel free to use the Mickey's! I am always glad to help out, but don't blame me if they help you blow up some driveline pieces!

Oh yea, this car is not a Honda, its my toy ... I could give a rat's behind if I lose 3 mpg..... I think 4.10's might be in my very near future!

-Jon

 

Just a thought, but have you tried back to back runs making a 3-4 shift? I know you said the car has a healthy cam, but if HP is tailing off, maybe the time lost on the 3-4 shift would be made up by being more in the power band at the traps. I see your 1-2 and 2-3 shifts are at a much lower rpm.

btw-I'm gettin a lot of use out of the wagons I bought from you

 

Great to hear!

The 3-4 shift would be right before the traps, basically I would hit 4th and shut down, last time I tried it I got the run on video from outside and saw the lights show up with my time right before I made the shift, hahaha.