Is dyno tuning worth it?

[wm_sorg]

Hi All,

I am getting to the point where I have to figure out what I am doing with my exhaust. I am probably going to take the car to ls1speed in all the way IL so hey can fabricate my exhaust. I discovered that they offer dyno tuning. I am considering it over the regular tuning method. Is it worth it? How is it normally done without the dyno and wide-band o2s?

[farmtruc]

What kind/size/setup of exhaust are you going with. I'd go with headers and 3" exhaust, no bigger. You can acutally restrict the exhaust enuff for the huge 3" if you go with a set of custom headers that are step down style.
Don't forget your H pipe.

Since you're going to be there, I'd go ahead and get the dyno tuning, along with wideband. Your a/f ratio is going to make that car run awesome if you get it dyno tuned with wb. You'll be able to squeeze every last HP out of the car.


good luck, your right sounds awesome,

allen

[wm_sorg]

Thanks Allen,

Unfortunately, I can not do headers due to space constraints. I was looking into shorties, but the general consensus seems to be that the 01/02 exhaust manifolds flow as well if not better. Any thoughts on this? So far I was planning 3 inch with dual random cats.

Lastly, will wide band tuning negitively impact emissions?

[farmtruc]

I agree on the manifolds, i guess gm did thier work on them this time. IMO, shorties aren't worth it. I'm sure you'll do fine with the stock manifolds. Hell, i think speartech was running 11's or something like that on stock manifolds.

The wideband is the best way to ensure your a/f ratio is accurate. The stock ones do ok at WOT only, but the wideband is a must on a dyno tune.
They'll simply drill a hole in your exhaust and weld a bung in, then hook up the wideband sensor, when you're done, they just cap it off.
I don't see it hurting emissions at all, it can only improve your tuning.

when's the going on?

later,

allen

[wm_sorg]

NO2 Probably not for a while. I do not think my 10 bolt will take it. After I get the springs in and have it painted I will be done with it for this year. In 04 I am planning going to 17" ZR1/GS wheels and ported heads.

With luck the drivetrain will hold up until get the money to upgrade it. I am going to have to stay on street tires. Keep away from the bottle, and the track, to make that happen.

Incidentally, how much did it cost for your last rebuild? (just in case I fall off the wagon )

[farmtruc]

Are you talking about the transmission:

I can't disclose my price, hahahha, but, a 4l60e rebuild is typically 1200-1400$, most of that is labor, parts are cheap and labor is $$$$, so if you know how, go for it and save a ton.

The engine:
My original engine did have a spun cam bearing, but that didn't cost my anything because Shaun from SMC Performance warr. my engine and sent my another shor block. The only thing i lost was my time to switch the heads and stuff. I learned a lot though. The ls1 engine is awesome, but i don't have to tell you that.

If you have a stock trans, get it rebuilt soon, i don't think they last long, plus it's cheaper to rebuild a tranny that isn't broken, plus if you burn some clutches up you wont have all that material in your TC , lines, and cooler. I know, i had that happen.


good luck,


allen

[wm_sorg]

I have never done one. Not sure I have the right tools either. My trans is stock, but low mileage. Looks like I will have to take it easy on it for a while. Did you learn how to do one on your own after all of those rebuilds?

[farmtruc]

ah yi yi, don't remind me, lol jk

i def. learned what all the parts look like inside and i know i could def. replace the third cluth pack. the internals used to be a mystery to me before my big trama with rebuilds, but now i think i could rebuild one. however, i would only attempt it on my own truck, lol.

when the 99 tahoe takes sht, i'll probably try to rebuild that one, or if i get some spare time ( i dont see that happening) i'll pull it and rebuild it.



i'm sure you can get one it quite a bit and it will hold up, at least you can run it and see how it feels and get some times, i just wouldn't count on it lasting like one would with a stock ls1 infront of it, that's all i meant.


when do you get to drive it?

i want times,

[Sleeper]

so allen...havent found anybody who makes a header set that'll fit our trucks yet? me and domeskilla have been discussing it now for a while.

Brandon

[GMCwantsLS1]

WM Sorg I'm with you I'll be spending all my cash on the conversion so I will have to be carefull and happy with the stock setup for awhile. Like Farmtruk sait the wideband tuneing is the only way to get every ounce of WOT power out of your car. I got to get mine started!!!