LLY: Questions on potential mods

[SKNKTNK]

I have an 05 GMC sierra 2500hd lly 5speed with 71k mi. It has a 9" long travel lift and I run 38" tires. I use it as a tow rig to tow desert trucks, quads, dirt bikes and stuff like that.

I'm thinking about getting a 3mm bigger turbo, efi live, egr delete, and getting the diffs regeared to 4.56 (it has the stock gears in em now)

I'm not looking to set any records or anything just want a lil more power and some better gas mileage. I know with the lift and tires I'm losing some power but that's not gonna change. I've had it dynoed at 349 hp and 1010ft lb.

What do you guys think? Any help/advice is appreciated.


Sent from my SCH-I535 using Tapatalk 2

 

[PACougar]

You didn't mention a built transmission, I'd plan that upgrade first before you go and through more power in there.

 

[SKNKTNK]

The shop I was talkin to said a new trams would be needed if i was at 550hp or above.

Would I be close to that?

Sent from my SCH-I535 using Tapatalk 2

 

[paint94979]

The shop I was talkin to said a new trams would be needed if i was at 550hp or above.

Would I be close to that?

Sent from my SCH-I535 using Tapatalk 2

im sorry but the shop you talked to doesn't know their head from their ass... the 5 speeds are good for maybe 425-450hp and given enough time they will limp and do damage to the clutches. If you want 500-550hp build the trans 4,000-$4,500 and get EFI Live, shim your FPRV, get a lift pump, and some larger boost tubes. Aftermarket intakes seem to aid in that last few hp when trying to max out a stock turbo so keep that in mind

 

[TheBac]

The shop I was talkin to said a new trams would be needed if i was at 550hp or above.

Would I be close to that?

Sent from my SCH-I535 using Tapatalk 2

Run away as fast as you can from that shop. They have no idea what they're doing.

 

[SKNKTNK]

Ok thanks guys I'll look at another shop. Would getting a 3mm bigger turbo be worth it or just do as much as I can to improve the stock ones breathing?

Changing the gearing should help as well right?

Sent from my SCH-I535 using Tapatalk 2

 

[DIESELMAFIAPER.LB7]

Ok thanks guys I'll look at another shop. Would getting a 3mm bigger turbo be worth it or just do as much as I can to improve the stock ones breathing?

Changing the gearing should help as well right?

Sent from my SCH-I535 using Tapatalk 2

gearing will help a lot where you located at?

turbo like a 4094vvt or 66mm s300 would be a good upgrade yes but imo twins will be best for towing lots

 

[SKNKTNK]

I live in las vegas. I don't tow a lot mostly just a driver.

Sent from my SCH-I535 using Tapatalk 2

 

[DIESELMAFIAPER.LB7]

what shop you go to underground?

also a billet 4094vvt would be a good choice lower egts a bit

then do 3'' boost tubes s&b mouth piece, 3'' downpipe, egr delete

 

[SKNKTNK]

Yea I'll be taking it to underground.

Any guess on hp numbers if I do all that?

Sent from my SCH-I535 using Tapatalk 2

 

[hondarider552]

That dyno was way wrong. Newly will take care of what you need and set you straight:thumb:

 

[SKNKTNK]

Was it reading too high or too low?

Sent from my SCH-I535 using Tapatalk 2

 

[DIESELMAFIAPER.LB7]

Tq was way off you should be low 600 high 500 something imo if the truck was stock the hp is high to should he 300ish