Little update *9/29 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-17-2005, 03:00 PM   #1
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Default Little update *9/29

I got two chips today from Sinster Performance.
Both had higher shifts and fueling adjustments except one had 2* advanced timing and the other had 4* advanced timing.
The fueling is closer and right now (with the 4* chip) and I'm getting about 21* of timing @ WOT with no knock. Time to bump it up even higher.
I'm shifting at 66xx now too. I can feel that after I shift, I'm right in my powerband. The car just starts pulling. My transmission sometimes won't shift at 66xx though. The rpms just kinda hang out there. My trans has done that a few times before when it down shifts. I might go back down 100 rpms. It'* giving me a pretty good scare. I emailed Ryan at *.P. of course so I'll see what he has to say about it.
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Old 09-17-2005, 03:13 PM   #2
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6600....holy crap...i bet that sounds amazing eh? i love the series 2 sound at the ol 5900 limiter...i can only imagine at 6600.

although ill admit the 3.5 DOHC sings quite a lovely song at about 6200...it redlines at 6500 but i didnt hit it.
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Old 09-17-2005, 03:40 PM   #3
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I'll bet with 4* more timing and higher shift points that car just woke up -again.
You seriously have to go to a track with that thing. I don't have a clue what you'd run, but you no doubt should be able to hold even with a lightly modded SI L67.

How much were those chips?
Can they do chips for 95 SI L67'*?

Sorry for the semi-off topic.
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Old 09-17-2005, 03:46 PM   #4
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Woah.... 6600 rpms... Thats a little much for that trans to handle....

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Old 09-17-2005, 04:10 PM   #5
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6600 is pretty high, man. I feel like my engine is screaming at 6000. Are our stock rods engineered to handle those kind of revs? I'd hate to see parts start flying out of that thing

You may want to dyno a couple different times with different chips in the PCM. That way you can pick which powerband you prefer, thus figuring out where your ideal shift points should be. If you're willing to spend the money at the dyno shop, do it right. Use the info to help achieve your optimum tune, instead of trying to show up on the dyno with huge numbers right off the bat.

Still, for lack of a better word, I'm quite proud that you're flying the flag for the NA crowd. With the increased timing of those chips, you may just beat my estimates for your car. Please, stop torturing us. Take it to the dyno ASAP.
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Old 09-17-2005, 04:16 PM   #6
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Quote:
Originally Posted by LittleHoov
6600....holy crap...i bet that sounds amazing eh? i love the series 2 sound at the ol 5900 limiter...i can only imagine at 6600.

although ill admit the 3.5 DOHC sings quite a lovely song at about 6200...it redlines at 6500 but i didnt hit it.
Yeah it gets pretty high pitched/loud. It dosen't really sound like anything else I've heard.

Quote:
Originally Posted by OLBlueEyesBonne
I'll bet with 4* more timing and higher shift points that car just woke up -again.
You seriously have to go to a track with that thing. I don't have a clue what you'd run, but you no doubt should be able to hold even with a lightly modded SI L67.

How much were those chips?
Can they do chips for 95 SI L67'*?

Sorry for the semi-off topic.
Yeah it did wake my car up a little bit.
I'm planning on goin to the track sooooon. (Dyno first though)
So far all I paid was $40 plus shipping. I think I have about 8 different chips already.
If your comfortable with collecting data, I'm sure they can do a chip for the 95 ser1 L67.

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Originally Posted by jr's3800
Woah.... 6600 rpms... Thats a little much for that trans to handle....
Yeah.... I was at 64xx before. It seemed fine there. ...... Mabye 65xx........ Trannys are scary.
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Old 09-17-2005, 04:18 PM   #7
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can you please get a video of that shift???
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Old 09-17-2005, 04:22 PM   #8
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I think the transmission has had all it can handle at 6500 rpms... That was one of the issues with the old 3.4 DOHC, the trans could not tollerate the redline of the 3.4... lol

I think this trans is going to have to be built to handle those extreme shifts

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Old 09-17-2005, 04:28 PM   #9
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Ryan has a list of powertrains he can tune at

www.gmtuners.com
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Old 09-17-2005, 04:30 PM   #10
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Quote:
Originally Posted by big_news_1
6600 is pretty high, man. I feel like my engine is screaming at 6000. Are our stock rods engineered to handle those kind of revs? I'd hate to see parts start flying out of that thing

You may want to dyno a couple different times with different chips in the PCM. That way you can pick which powerband you prefer, thus figuring out where your ideal shift points should be. If you're willing to spend the money at the dyno shop, do it right. Use the info to help achieve your optimum tune, instead of trying to show up on the dyno with huge numbers right off the bat.

Still, for lack of a better word, I'm quite proud that you're flying the flag for the NA crowd. With the increased timing of those chips, you may just beat my estimates for your car. Please, stop torturing us. Take it to the dyno ASAP.
There have been a few people on cgp reving past 66xx without issue. And I know the n/a 3.8l zzp car is revving past that with a stock bottom end. And I have stiffined/ lightened up my valvetrain to rev higher.

As far as preping for the dyno goes, I was just planning on advancing the timing till I start to see denotation then back off a few degrees. So I'm going to try and get more chips by next weekend with even more advanced timing. All along we will be bringing the AFC settings closer to 100%.
Once I max out on timing, I'll hit the dyno. There I'll be able to wideband my car, temporarily adjust the fuel with the afc, then adjust the actual fuel curve accordingly.
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