00gmc4.3

I have a 4.3L with a 5 speed MT. Do you think the tune would really be worth the price for it? Being a MT, I really wouldn't benefit in the tranny department, but what about torque and horsies?

00ChevyScott

iTrader: (10)

Simply put, no.

A Low Dime

iTrader: (13)

Nope. I would say with a 4.3, a tune REALLY helps part throttle/full throttle shifting. But you in a manual so you would not see anything.

00gmc4.3

Thanks Brendan,
So, I'm thinkin best bet is to force more air into the sucker? That is, after I fix my annoying clutch problem.

hirdlej

iTrader: (31)

I know this'll make most guys cringe but on my 97 C1500 4,3l 5 speed truck I installed a hypertech power programmer. Set the top end to 128 MPH and adjusted everything the way I wanted it. It made a great improvement in throttle response and trust me, a 4.3L 5 speed truck with 3.42 gear WILL HIT 128mph

BlackGMC

iTrader: (31)

Wanna see what a HPP buys you on a 4.3.... Attached are stock and HypeTech tunes from the same truck (A Low Dime's truck). The only change is added timing, and PE leaned out by 0.1...

Stock


HyperTech

hirdlej

iTrader: (31)

Maybe the '97's are different. I'm not saying it's a 100% difference, but I bet it's a 5-10% difference. At least on my truck it was. I at least selected the 160deg thermo setting assuming it added more timing along with the 93 octane tune. It still hits 128 mph. Pretty impresive for a little V6 in a 4100 lb truck

BlackGMC

iTrader: (31)

I dunno man, i was not doubting you or anything, maybe brendan's was different but when i first downloaded both from his truck it made me laugh... His is a 2000 s10

stock48

iTrader: (16)

I say yes on the custom tune if it's done right. You need to be careful on the timing curve with a stick because it will rattle on the low RPM if you have too much advance. I know on a vortec 350 with the same chamber design 26~32* of timing is worth 25+ HP. I went from 19* to 28* on my 2K 4.3L S10 and it made a big difference. It was still a dog but picked up over 1/2 a sec and 4MPH on the G-tec from timing alone. Also ran best with the stock or lower shift points. After 5K power falls bad.

A Low Dime

iTrader: (13)

Im only running 24* timing now.

Mine falls off nasty above 5k as well.

If I had not planned of going boost or sprayed, Would I have spent $200-$400 on a programmer or a custom tune? No.