Truck and current mods in sig.
Goal is a 400rwhp stock bottom end 5.3l DD. I dynoed 285rwhp/330rwtq pre tranny and tq and new exhaust. I plan on using WCCH 5.3 heads ported/Polished & milled to 11:1cr with 2.00" int./1.xxexh. valves and supporting valvetrain. I'm set on the TR220-112 high lift cam, and a ported FAST 78 to go with my BBK 80mm TB. I'll be doing some additional bolt ons as well...e-fans, ud pulley,cutouts and maybe even e-waterpump. To put it on the ground I'll be using Hoosier slicks w/longbars and dragshocks for track. What do you guys think? And what kind of 1/4mi et could be achievable if I can get a 1.5-1.7 60'?
Once I blow the bottom end or get bored I'll either end up punching it out to 5.7 with forged goodies and the above mods or build a 408 NA, but for now I want to see what I can squeeze out of the 5.3 NA with no laughy gas.

 

I think you'll be about 40hp short to be honest. I see this setup making about 360hp and 370-380lb-ft of torque at the flywheel. If the tune is spot on, maybe 370hp flywheel but that's asking for a lot.

 

If he's making 285 @ the wheels now he's probably already close to 360hp at the crank. Did you mean 360-370 @ the wheels??

 

like I said it's a goal, i don't know if it'll happen on that setup or not, but we'll see. I'm just curious how much power these 5.3's are capable of making for my information and to provide info for my fellow PT.net members. I'm not interested in building a dyno queen but it's a good representation of power, putting it to the ground and down the track is a whole other thread. I'm willing to try different combos if needed. After talking to Thunder Racing, my tuner/LS specialist and WCCH they seem to 400rwhp is achievable with this setup, but we will see. I think some Longtubes will be needed.

 

No sir. 285hp at the crank is only 327.75hp at the flywheel, assuming a 15% loss through a 4L60E which has been proven time and time again as engines are dyno'd out of the vehicle, and after at the wheels. There have been quite a few articles on the parasitic losses associated with GM transmissions, just Google for one if you're interested. What I like is that these newer 6-speed autos are getting really close to the 7-8% losses found usually only with manual transmissions. That means the new trannies of today are getting more efficient. Woohoo!

Figuring the heads will make the most difference pushing the horsepower up 30hp, I don't see the camshaft and intake picking up the remaining slack, especially since the goal is 400 rear wheel horsepower, which again is 460 flywheel horsepower, respectively. But a goal is a goal...bottom line here we're all just piecing together parts to make the most usable power we can.

 

So you're saying he's only going to gain 50 lbs of torque at the flywheel by adding a cam, heads, efans, pulley, tb. If so you're a fool man. That combo should easily be enough for 60 lbs of torque to the rear wheels.

Also, you don't even know what kind of dyno he dynoed on. If it was a mustang dyno, he could already be well into the mid 300s at the flywheel.

 

dont know he will definetly need heads...

I only gained 33hp with my cam and the lift is 571/578...i know the 220 cam is good but i dont see him getting over 350 at the wheel...

 

It's how they're all matched together that will determine power. The electric fan wont do a thing, the pulley will only lessen the parasitic losses, not adding any power, but freeing up what's already there. Even so, only a fool would believe what you read in the magazines that pullies are good for making *** loads of power. The larger TB will help breathe in the upper RPM's if anything, not helping much at all below 5000. The real increase will come from the heads and camshaft, so that's all I'm looking at for the moment to increase output. We'll see who's a fool in the end, which I don't appreciate being called simply because I gave my opinion. If he wanted just your opinion, he'd PM you, RandomHero.

 

It has been shown plenty of times that the ASP underdrive pulleys are good for as much as 11 rwhp/tq. I would realistically expect around 7 though. Efans are good for 5-7 as well. That's around 15 rwhp which is 17.25 to the flywheel.

Even if a cam only nets you 30 rwhp/rwtq and heads get you 15 rwhp/rwtq. Thats 40.25 at the flywheel.

So if you're making 325 right now, that stuff would put you at around 380 flywheel torque and that's conservative! There are plenty of guys who have gained 50 rwhp/rwtq with a cam and 25 rwhp/rwtq with the right heads. Add in the intake and you should be well into the 400s at the flywheel. Now with that said, you'd need roughly 460 flywheel torque to put you at 400 to the wheels.

 

I must chime in and say that e-fans and pullies only "free up" what is already there by taking away restrictive methods. none the less still a good mod! I also think that the setup may be a little short of the goal but no doubt it will be close. Just my 2 cents. maybe a tornado will push you over that 400 mark