Was able to run Larry's STS-SS up to 8lbs of boost, successfully and it scooted like a bandit. Too bad the prep wasnt there, tires werent there either. Once he can launch under some boost w/o blowing the tires it should easily knock a second off the current new best of 13.13 @ 108! Way to go Larry, going to have to sharpen the ice skates for the next round out.

Keep in mind, his best 60' was like a 2.4 or something and as Dennis (our track announcer and friend) noted, he was spinning all the way through 1st, and most all of second, not to mention the 2-3 shift put her sideways more than once Embarassed
Adjusted:
Fueling, noticed the AFR around 12.0:1 on the way to the track, so richened her up some more. I am not sure exactly where we want it, but I know that 12:1 is a little lean for a stock bottom 8lbs of boost turbo LS1. Wasnt able to log the AFR, using Larry's LM1 forgot the EIO interface cable to piggyback onto the HP Tuners logging Ugh..
Timing, was able to add in a couple more degree of timing. Max now is around 13*, which can probably come up to 18 once he gets the #15 Meth Nozzle in.
IAT's, with meth we logged a steady 7-10* increase per lb of boost over 5lbs. Used to be ~105 on 5psi, logged 113* @ 6psi, 127 @ 8psi...we kind of decided to skip 7psi Wink Add fueling for temps above "X" IAT, to reduce chances of KR, also reduced timing with "X" IAT.
Next time out, hope to have the larger meth nozzle in place, some race gas mix, and some big bad sticky tires to hook at the line under 5-8psi boost. I am pretty happy about it and I believe Larry is too, well after scrapping the **** out of drawers from the new tune and oh yeah the addition of a 3800 2.4str Stall.

Run down of the setup:
2002 35th SS 1LE, add STS with T67 upgrade, and a Fuddle Racing 3800 2.4str TC, Walbro 340 intank, 42lb injectors, TR-6 plugs.

Next mods should include, addition of sticky tires, some suspension work, LSX 78 or 90mm setup, headers and Y pipe, 918 springs, hardened pushrods, maybe a small turbo cam Hopefully some weight reduction too, this thing is a pig compared to my 3260# car. Cant wait to get some decent track prep (yeah right!) and some tires to match to get out of the hole on boost! Starting to like the tuning the turbo routine.

Charlie

 

Not bad. Gotta keep chipping away at it. My first run after I installed the blower was a 12.95@108. If you don't feel like messing with E.T. streets try the M/T drag radials. He won't be able to spin them that easily.

 

Get the air/fuel down to 11.3/1 to 11.5/1 so you don't hurt the #7 piston. You should be able to run 16 to 18 degrees of timing. Bob

 

what is the elevation at the track?

 

what were your times i read the post and didn't see any


OH i see them at the top 13.13 @ 108

 

looks like some decent runs

 

Bob, thanks for confirming my thought on the timing and fueling. I have been reading here and teaching myself how to tune his car, so far so good. Have a couple runs here and there with some KR, but have made clean runs with it at 6psi and 8psi. I am trying to fingure out he keeps getting a misfire SES now and then, factory cam, so not that. Normally will get a SES after snapping the throttle closed, like the burnout box, or last night it went to shift to 3rd and the tires spun he let off and SES? Any ideas?

Elevation is about 6pack more than the ocean, but our DA was up around 3000 or so last night. We're getting feedback in form of rain and the trade winds lacking their push from the tropical depression from last week, and this weeks Trop. Storm Kenneth.

 

That MPH is way low for 8 psi on that turbo. Should be trapping 115+

As for the missfires, what is your plug gap. If it's not .030 then change it. I have mine at .031 right now and am blowing out the spark at 12-13 psi so now i'm going to .025.

 

108....I trap higher with a lid and exhaust. DId he let out at like the 1000' mark or soething, that is WAY off.

 

Well, you wouldnt be trapping that here in Hawaii, trust me! Most lid/exhaust are trapping 104 on a good day.. Our DA varies as much as probably 500-1000' from one run to the next on a bad day. I know last weekend, friday night DA 158', then 24hrs later it was almost 3000'. That and the track not being prepped, and if you run here, you will understand that in Hawaii you can go ice skating. Yeah I am making excuses, not because I am tuning it, hell he and I both know I am fricken guessing at this ****. But...the track honestly does suck, so bad last night, he had let off at each shift cuz he was sideways. I looked at the log to see it also. Each shift, he let off, after the first run which put the rear out of the groove. Anyway, I do think the gap is larger than that, as we never expected to run 8psi so soon, figure we'd stay with 5psi a lot longer. Oh well, will get them regapped and try that. Thanks.

 

damn is he shifting manually?...spinning after each shift sounds like an m6...does he have a shift kit?...doesent make much sense spinning after each shift in an auto?...that guy needs driving lessons and tires....lol...good luck

 

Tires no doubt, he was running his 18" streets (doesnt have his slicks mounted yet). Not shifting manually, just with the new Stall and some tuning tweaks to the trans it is pretty crisp and responsive. The couple times he was able to keep it straight @ 5psi, he seen 8psi spike at the shifts, is that normal? If it is, I can see why it only got worse when we cranked it up to 8psi and his has 100% TPS until shift, then it was down and back to 100% etc.

 

Other than the mileage, and years your setup and Larry's are very similar. He's running the 67 w/ 42's, and meth no FMIC. What kind of IATs are you seeing, and your ambients. Ambient last night was fluctuating from 72* to 80* as the trade winds rolled in another storm, and IATs @ 8psi were at 133*average ON METH. Seemed kind of high, but then he told me he hadnt swapped in the # 15 meth nozzle yet.
Did you change the Advance vs. IAT at all? I put in some -x advance based off the meth running out, having issues etc, or getting too high IAT's.
Also added fuel the same, vs IAT's.

TIA,

Charlie

 

well on a 90* day my iats at wot are at about 100-115 and cruising 140* and I can boost up to 10psi on the street with 13-14*timing on 91octane with no meth. On a 100 octane my iats were at about 90-100 and I ran 17*timing and almost 9psi....I have the sts methanol kit installed i just havent ran it yet, but if your seeing iats at 130*plus with the methanol working something is wrong....I did change my advance vs iat but I have it at 0.

 

My meth results (i am intercooled) from today are. 110 cruising on the high way, 55 when the meth kicked in creeping up to 58 degrees by the end of 4th.

The STS meth kit sprays after the IAT sensor which is dumb in my opinion. You should reroute it to spray before it for best results.

BTW, I trapped 126 on 13psi t67 with 4600 DA here in vegas. Our track is at 2200'

 

I dont need driving lessons. Just need tires.I was running streets. The track here in Hawaii is terribly slick and on top of that it rained on it all last week. Everytime the car shifts (not manually) it spins them. The trap speed was probably so slow because I couldnt even get deep in the throttle until around the 60ft without smacking the wall. I will adjust my plug gap. I have it at .35 now. If I remember correct my IAT w/o meth last time at the track were around 160 at 5psi and then adding meth dropped it to 117 with the m-10 nozzle.

 

You remember correct Larry. I think it would be good idea to redo the nozzle, and use the bigger #15. I wish I would have known where the meth was before, ie post IAT sensor...gees. Go gap your plugs and I'm mounting the lightweight battery...gee just so you can have a red top for the 2001Z28 you have!

 

My meth nozzle is before the IAT sensor. it goes nozzle, IAT, then throttle body. Why would you want it after the IAT sensor?

 

I mentioned that because i've seen several of STS's kits plumbed after the IAT instead of before it.

 

I'm just running 5psi stock no meth. and I'm spinning into 3rd but I'm still traping at 114 at 13.0. Thats in St. louis with bad humdity. Sounds like the track your at needs better prep.