Pontiac G8 GT Dyno Before And After Gear Swap

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Pontiac G8 GT Dyno Before And After Gear Swap. Had a car in for a gear swap and tune so perfect time to make a video on how a rear-end gear change will make the dyno or power read differently. I also did a 3rd gear vs 4th gear pull to show how that changes things too.
Both pulls when comparing the 2.92 to 3.45 were on the same tune.
The 3rd gear vs 4th gear was also with the same tune.
All pulls were done the same day within 2-3 hours from start to finish.

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Опубликовано:

9 май 2023

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Комментарии : 31

@andrewd843 Год назад

Horsepower = Torque x Rotation per Minute (rpm) / 5,252 Gears change tq output, so it makes sense

@TheMoghrabimahmoud Год назад

You run a very interesting channel. Your technical content is unmatched on RU-vid

@andrewd843 Год назад

Thanks! There's definitely better channels though. I usually just try to make videos on things people either talk about but never have data to back up their thoughts or things I've just wondered and never saw what I was looking for.

@All_Stock_Garage Год назад

More info in this short video than half the bullshit I spend time reading online

@andrewd843 Год назад

Thanks! I try to be short and to the point with videos like this.

@TonyTheTruckGuy Год назад

Wow I wasn't expecting that. Good gains! I'm probably right in between there since my G8 has 3.27 rear end. Great video!

@andrewd843 11 месяцев назад

I've had both 3.27s and 3.42s in my ss. Sometimes I'll swap them out when I'm bored lol

@TonyTheTruckGuy 11 месяцев назад

@@andrewd843 🤣

@nastymk3 11 месяцев назад

@andrewd843 how big of a difference is the 3.27 compare to 3.42?

@andrewd843 11 месяцев назад

@nastymk3 it's a decent difference. I've done 3.45s on a few different setups. Did a header only SS went from 3.27s go 3.45s, went from 3.27s to 3.45s on my supercharged SS. I try to gear cars based off what MPHs they'll trap and what tire sizes etc.

@H111-y8f Год назад

My gmc sierra L83 used to be NA 4.10 gears and with new setup stroke mast performance 350CID single turbo kit by spike 11PSI meth injection puts down 645whp i kept 4.10 I don’t feel i need to change it, moves pretty well for roll racing also i swap rear brakes to fit 15inchs racestar wheels and MT tires, thank you for the helpful video

@sickesstvenado96 Год назад

Question did you swap out the complete differential or did you put 3.45 gears in the stock diff?

@andrewd843 Год назад

Whole diff to the camaro 3.45 it's a stronger diff vs the stock g8 one. It bolts right in with no modification.

@paulbenavides6954 Год назад

Nice video this one did it to convince me to do the swap. But how is it from a dig. Can you hook. Or from a low roll

@andrewd843 Год назад

I have 3.45s in my LSA SS, and it hooks just fine. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2YGmUMI3xFE.html

@ColdStoneRacing 11 месяцев назад

Great videos man. Been trying to learn as much as I can. I'm pretty new to e-tunning. What's your opion on the Blue Line Performance Probationary cam? I'm looking for something that'll work well with a stock TC. It's the gf's car so I don't wanna swap the TC yet.

@andrewd843 11 месяцев назад

Honestly, the stock converter is such a turd. A completely stock car with a converter and tune will usually be faster at the track and drive better than any aftermarket cam on the stock converter.

@justincruz6192 Год назад

Bro thanks for the info ! I have a Camaro and went from 3.45 to 3.91s and wondering if i lost hp i like vids like this lots of info

@andrewd843 Год назад

I mean the engine doesn't technically make anymore or any less power from a gear swap but how it equates to the tire changes. Manual or auto car? 3.91s are short gears on a 6l80.

@justincruz6192 Год назад

@@andrewd843 M6 I feel like the 3.91 really helped out with 3rd gear

@andrewd843 Год назад

@@justincruz6192 oh yeah on a manual they can be sweet

@v10tt 5 месяцев назад

@@justincruz6192 any before and after dragy 60-130 pm gear change?

@justincruz6192 3 месяца назад

No dragy but I could tell you 3rd gear is alot better than before

@ryanrobitaille5903 Год назад

What do you mean no tune changes? Would of had to tune just for swapping the dif would you not have?

@andrewd843 Год назад

@0:44 I said the only change I'm making is correcting the gear ratio. No timing, no fueling, no anything changes. Just changed the gear ratio for the mph to be correct.

@337speedway Год назад

Question so I ended up just buying 3.45 ring and pinion what else would I had to change in the diff to make this fully functional?

@andrewd843 Год назад

What do you mean? If you only bought the gears, you're going to need to take the diff apart and change the gears and make sure everything is set right.