Track results with my Limited

[gusszgs]

I thought you didn't have a trailer. That's ok, it didn't break so it is still a very successful outing. A couple more trips like that and you'll be hitting 11s more often than not.

I don't own a trailer....... .a good friend was kind enough to lend me his.

[Scoobum]

Thanks guys,
The brake set-up is stock fresh rotors/pads on front. flex hoses are Russell braided (all 3)
Drums are cast with soft shoes adjusted tight with S-10 wheel cylinders. System bled properly. Yes I do have line lock.

You should be able to hold a shitload of RPM's on the line. I'd be curious what the convertor is doing on the line...and what it's flashing to. Another situation where PL is invaluable.

[gusszgs]

UPDATE


Spent a good part of 2 days addressing my brake holding issues. Adjusted, adjusted,adjusted. bled bled bled.......wit h the proportioning valve depressed. By late Sat afternoon I was holding 5-7 psi in driveway and over 10 with the e-brake as well.
So, off to the track again today in my snow suit to see if I could improve on last week. Got there, and thought it was closed. For the 1st 45 minutes I was the only tard there. They took my money so I was racing. About 10-12 cars only showed for the day.
Anyway,
1st pass no ticket, I think the kid hadn't turned the printer on 
[size=78%] [/size]
2nd pass 12.10 @ 113 1.94 60 24psi
3rd pass 12.56 @113 2.30 60ft spinning (-20% fuel out 1st gear)
4th pass abort (blew DR's off, got back in and blew em off again about 330 mark)
5th pass 12.6 @112 again spinning out of the gate 2.16 60ft
6th pass 12.6@ 112.5 2.30 60 ft leaving at a gentle 0-1 psi and spinning
7th pass 12.46 @ 113 but crappy 60 again 2.17 Mickeys lowered to 15psi from 20


Track was cold I know as the temps were no more than 45* with a nasty head wind. Got a tinkle of KR on 1 pass of .9 at 44mph when I bumped the timing in 1st 26*
I had the tire pressure all over the place to try and help hook but no luck. The 1.94 was at 20 psi tires are MT DR'S 255/60


*NOTE there was delays waiting for the plows to clear the ice n snow 


Yes Brad.......... ...PL and slics are on the list 
 

[Scoobum]

Jim, I'm likely gonna be at Cayuga next Sunday. I have 9" slicks on GN rims...and also 10.5's on GN rims. You're welcome to try both. I can promise you ya' won't spin 'em. 


I have a spare ECM sitting here...and I can nip it open to accept PL. PL is in my car...and I can't get to it...but I'm sure Dan Keller will lend me his...and I'll use my laptop.

[gusszgs]

Oh I'm sure I wouldn't............a nd I appreciate the offer Brad but next weekend is out for me. I've a 25th wedding anniversary party to attend for my best bud. I have a set of Hoosiers QT's I use on the GS but they're 11.5 x 27"......I doubt they'd fit, but man they hook.

[Scoobum]

Jim...any idea what your RPM's were at the traps? Stock cam in that engine? Steve...do you think with that convertor unlocked...and the 26" tire...that the stock cam was out of breath before he hit the traps? If so...will the 28" slick pull the RPM's down in a more useable range? Just thinking out loud here.

[gusszgs]

By the way what slick fits nice in these cars without any rubbing worries? Will a 28 x 10" fit in there ok on a 8" steel rim? Offset needs to be 3.5? correct.

[Scoobum]

I had a look at the 27x11.5 Quick Time Pros. They come in with a section width of 11.3. The 9" MT's come in at 10.8...and the 10.5S comes in at 12.5. Jim...double check that I got the Quick Time sidewall measurement correct. If they're 11.3...then they'll fit on an 8" rim with a 4" backspace and aluminum drums...or a thin spacer with cast drums.

[Scoobum]

Here's what fits...and please take note. I run aluminum drums...which are a tad thicker. If you have cast drums...you'll have to adjust with shims.

GN rim 3 and 7/8th" BS

MT 28x9 slick...no shim
MT 28x10.5S and 10.5C...no shim
MT 275/60/15 DR...no shim

Billet Specialties 4.5" BS

MT 28x9 slick...7/32" shim
MT 275/60/15 DR...7/32" shim

The MT 275/60/15 DR shares the same sidewall measurement as the MT 28x9 slick.

[gusszgs]

Thanks for the tire info Brad.

 The car was pulling hard all the way to the end.........fe lt really good. Yes, stock factory cam still 110k on unopened block.Just a set of Comp 980's
Sorry I don't have the rpm's at the traps. Oh, also I testED out the converter after getting the brakes sorted out. At 0 psi SM read 2750. Went to 2950 at 2 psi. about where Dave said it should stall with my set-up
I did try leaving at 5 psi on one of the runs and felt like I was at the ACC racing the Zamboni

[Scoobum]

Sounds like David got the stall correct. The cigarette lighter bouncing off the back window is an indication of a good launch. I always know if I've done a 1.7 launch or better...as it knocks the wind out of me. A 1.7 launch is 1G on the body.

[TexasT]

I think you are on the right track. Just cold today and it doesn't sound like they did any track prep. And with a head wind I think your mph looks good. Just have to get her to launch and hook. It'll be in the 11s fo sho!

[good2win22]

How long of a burnout were you doing?  I learned from Gary Schatz that you really have to stay in the burnout a few seconds longer than what you think is good to really get the MT's sticky.  Then again track temp and prep makes a difference too.

[larrym]

Sounds like David got the stall correct. The cigarette lighter bouncing off the back window is an indication of a good launch. I always know if I've done a 1.7 launch or better...as it knocks the wind out of me. A 1.7 launch is 1G on the body.

It's startling the first time it happens and puts a big grin on your face

[Steve Wood]

Jim...any idea what your RPM's were at the traps? Stock cam in that engine? Steve...do you think with that convertor unlocked...and the 26" tire...that the stock cam was out of breath before he hit the traps? If so...will the 28" slick pull the RPM's down in a more useable range? Just thinking out loud here.

As we don't have a trap rpm to look at, or a log to see how the rpm ramp is looking near the traps, it's hard to say.  My gut feeling says a taller tire will leave harder and ramp the boost better off the line and it will make more mph without any slow down.

Looks to me as if he should have plenty for a taller tire.