i got a 2001 silverado has a 05 tahoe 5.3 in it how much power to rear wheels yall thinking im making and what tuner do yall recomend im lookin into blackbear the most but i have the following mods

pacesetter longtubes in to a y pipe and maganflow
slp 25% undedrive pulley
ported and polished throttle body
ported intake manifold
cold air intake with airraid tb spacer
electric fans
3:73s
and a diablo but im bout to junk it and get a real tune how much power do yall think im puttin down ?
thanks

 

You honestly havent gained a whole lot. Youve probably gotten some better throttle response out of it. And im sure it feels quicker to you but truthfully I doubt youve gained much over the 285 there rated bone stock.

 

255/275 at the rear is my guess; that's where I was with your mods, a 93 octane tune less your longtubes. Nelson, Wheatley and Blackbear are all top notch.

 

**** I didnt post numbers. Were not far off I was gonna say around 240ish

 

thanks for the info yall it does feel alot more quicker by the seatometer im tryin to get it around 315 wheel somewhere in there i was gunna do a tsp 220 or 224 cam and springs but time i went to go order it my tci 3k stall broke so i didnt have the money to order the cam and new stall so i put it on the back burner and i was thinking bout go 4:10 would that be worth the diffrance from 3:73 and do yall recomend any other power mods besides like a turbo or supercharger haha

 

what heads are on your engine??? 243/799 ??

i would say around 280, i would wait to do a custom tune for when you get a cam.

that gear swap wouldnt be worth the time. cam is cheaper anyways

 

280 to the wheels? Theres no way I dont think

 

there 243s and 280 is more around what i was thinking

 

Im not bashing your truck at all man. Not trying to **** you off either but I think that is way high. Get it dynod before you start with any more mods and see where youre at then again later after some power adders

 

I bet you're looking at 240RWHP as well with those mods. You haven't actually added much horsepower to the engine, maybe freed up some but haven't gotten into adding any yet. With a stock cam all those porting mods basically do nothing for you right now. With the headers you might slightly improve breathing but again on the stock cam the longtubes are just overkill and not really netting you any power.

FYI: 243's don't do anything for a stock engine. Their increased flow characteristics need a bigger cam.

A good cam will add ~60HP and in some cases as much as ~80HP but that's pushing it. To give you an idea: