5.3L torque monster...
I don't think the price is bad either. You don't have to buy bov's or wg's and they are very high end turbos.
If you have good fuel like e85, run compression around 10:1. A good cam and converter for your combo will also be key.
8 Second Club
Joined: Apr 2006
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From: in my neighborhood
here you go. this was with a billet 80 on a 5.3 14 psi, 91 octane babysoft timing. no cam no springs just a bone stock 5.3. if you stepped down to a cast 76mm and put a cam and springs in it, it would spool quicker.
Staging Lane
Joined: Jul 2012
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From: Detroit, MI
Damn that looks like some pretty crazy valve float, it breaks up horribly after peak torque. Still good numbers for a stock motor on only 14 pounds tho
8 Second Club
Joined: Apr 2006
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From: in my neighborhood
oh yeah it floated them pretty badly. put a set of springs in it and it cured all that. that was a long time ago at this point lol
Looks like late spool to me. Not what the OP is looking for.
8 Second Club
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From: in my neighborhood
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The EFR's have internal wastegates and BOV's right? Have to consider that in the price.
But I think Andrew in on the right track with the low rpm power. It makes for a funner street car for sure.
But I think Andrew in on the right track with the low rpm power. It makes for a funner street car for sure.
Lots of smaller turbos will work fine for you. Seems like everyone needs a 6266 anymore on the internet. Go billet if you want the best power in the smaller wheels. No reason you couldn't run PTE or Turbonetics in smaller sizes and get good response, but most people go to big. The new fad in a few years will be downsizing turbos like everyone is doing with cams haha.
Those EFR's look pretty interesting. The price isn't too bad when you consider what you are getting. From what I have read about them, they seem to be very responsive down low.
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From: Norn Iron
Depends entirely what you want and how you'll drive.
The EFR is only really an advantage to give you a wider spread of power as they claim to offer excellent spool, and excellent performance at the upper end too.
But you just need to look at the OEM...if you need fast spool for a high torque setup...you just need a suitably sized small turbo, cast wheel.
So it can be done cheaply, but as most people here would be aiming for power vs low rpm torque, it's natural to select a larger turbo
The EFR is only really an advantage to give you a wider spread of power as they claim to offer excellent spool, and excellent performance at the upper end too.
But you just need to look at the OEM...if you need fast spool for a high torque setup...you just need a suitably sized small turbo, cast wheel.
So it can be done cheaply, but as most people here would be aiming for power vs low rpm torque, it's natural to select a larger turbo
Thread Starter
Joined: Mar 2003
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From: Little Austin
What do you guys think about the short block requirements for such a build? I am pretty sure that due to the high cylinder pressures at low RPM an all forged rotating assembly would be a must.
For heads I would think the TrickFlow GenX 205s are the way to go. Does anyone else make a head that works with the stock 5.3L bore?
Andrew
For heads I would think the TrickFlow GenX 205s are the way to go. Does anyone else make a head that works with the stock 5.3L bore?
Andrew
8 Second Club
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From: in my neighborhood
What do you guys think about the short block requirements for such a build? I am pretty sure that due to the high cylinder pressures at low RPM an all forged rotating assembly would be a must.
For heads I would think the TrickFlow GenX 205s are the way to go. Does anyone else make a head that works with the stock 5.3L bore?
Andrew
For heads I would think the TrickFlow GenX 205s are the way to go. Does anyone else make a head that works with the stock 5.3L bore?
Andrew
Thread Starter
Joined: Mar 2003
Posts: 10,613
Likes: 1,882
From: Little Austin
8 Second Club
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Sounds like your over thinking it. This isn’t the NA world and none of those “fancy” parts are needed for your goal. The engine becomes the cheap part when you are only targeting 550-600whp. Get yourself a gen4 5.3. Run head studs and decent head gaskets. Leave the long block alone. 67-70mm single and a mild cam…done. Look at the mileage stock48 is getting out of his unmodified short block builds. Making more power than your goal at heavier weights.
If you’re going to spend the extra cash on a forged rotating assy and heads, you’d be money ahead buying a gen4 6.0. With a small cam it would meet your power goals with little boost. The added cubes will help with your “insta-spool” goals.
If you’re going to spend the extra cash on a forged rotating assy and heads, you’d be money ahead buying a gen4 6.0. With a small cam it would meet your power goals with little boost. The added cubes will help with your “insta-spool” goals.
