500 hp na 6.0
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500 hp na 6.0 hey everyone im wanting to ls swap my 1985 2dr short bed f150. not asking for hate on the brand heresy just wondering what the best way to get 500 rwhp out of a 6.0. if i can find a aluminum block then ill go with that but most likely ill be doing the truck motor. my plan of attack right now is the texas speed heads and cam package thats advertised as 530 hp package. ill then use the jegs aluminum intake and fuel rail with a jegs 92mm throttle body. some 36 lb/hr injectors and some ebay long tubes for a silverado and custom 3 inch exhaust. not on a small budget but im trying to have the motor built for around 5k. ill be doing all the work myself so labor prices arent in consideration. this is going to go in a daily driver with a t56 behind it and a 3.73 posi 8.8 rear so i want reiability with the power. im very curious what will be needed for fuel system. thank in advance!
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From: Missouri
dont use the jegs intake set up your looking at, a tbss ( or the 08 and up cath port truck intake) will perform better but be ugly. a holly hi ram and nick willams tb will also work and look nicer. since its a truck it should fit no problem.
hey everyone im wanting to ls swap my 1985 2dr short bed f150. not asking for hate on the brand heresy just wondering what the best way to get 500 rwhp out of a 6.0. if i can find a aluminum block then ill go with that but most likely ill be doing the truck motor. my plan of attack right now is the texas speed heads and cam package thats advertised as 530 hp package. ill then use the jegs aluminum intake and fuel rail with a jegs 92mm throttle body. some 36 lb/hr injectors and some ebay long tubes for a silverado and custom 3 inch exhaust. not on a small budget but im trying to have the motor built for around 5k. ill be doing all the work myself so labor prices arent in consideration. this is going to go in a daily driver with a t56 behind it and a 3.73 posi 8.8 rear so i want reiability with the power. im very curious what will be needed for fuel system. thank in advance!
500WHP is alot more than the 530 crank hp that is advertised in that package
for 500whp through a t56 out of a 6.0 youll want a rec port head, 11.5:1+ compression, holley highram or similar intake and lots of cam and rpm which means good valvetrain parts
stay away from all of those cheap fabricated intakes theyre junk and make less power than stock NNBS truck intakes
youll also need way more than 36 lb/hr injectors and will probably want steeper gears than 3.73
E85 an option? Milling the factory head a ton is the easiest/cheapest way IMO. You don't need to go near as radical with a 4" bore. I'm at 13.3:1 on a bone stock JY 5.3 with nothing more than .100 shaved off the heads. Used a DIY at home valve cutter to cut reliefs in the flat top OEM pistons as needed.
I'd source some cheap 706 heads ($50 at our local junk yard). Decent valve job on those and mill .050 off or so. Home port if you know what your doing. Then run one of the cheap stg2-3 sloppy cams. YOu'd hit your goal or more for half the cost of the setup you mention above.
I'd source some cheap 706 heads ($50 at our local junk yard). Decent valve job on those and mill .050 off or so. Home port if you know what your doing. Then run one of the cheap stg2-3 sloppy cams. YOu'd hit your goal or more for half the cost of the setup you mention above.
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ive looked at the holley ones but im not wanting to spend that much on them as much as i would like to do that. im new to the ls world so what do you mean by tbss? also are you referring to the stock 08 and up intake?
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what kind of power do you think ill make with the setup mentioned? i also am not set on the jegs intake manifold i just liuke the look alot better then the plastic ones. what kind of injectors will i need?
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E85 an option? Milling the factory head a ton is the easiest/cheapest way IMO. You don't need to go near as radical with a 4" bore. I'm at 13.3:1 on a bone stock JY 5.3 with nothing more than .100 shaved off the heads. Used a DIY at home valve cutter to cut reliefs in the flat top OEM pistons as needed.
I'd source some cheap 706 heads ($50 at our local junk yard). Decent valve job on those and mill .050 off or so. Home port if you know what your doing. Then run one of the cheap stg2-3 sloppy cams. YOu'd hit your goal or more for half the cost of the setup you mention above.
I'd source some cheap 706 heads ($50 at our local junk yard). Decent valve job on those and mill .050 off or so. Home port if you know what your doing. Then run one of the cheap stg2-3 sloppy cams. YOu'd hit your goal or more for half the cost of the setup you mention above.
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If you're going to be driving it all the time then sure go E85 but you'll want PTFE lines 8AN feed and return or 6AN would probably work too but now your having to deal with replacing lines and aluminum fittings beacuse the causes of ethanol use can really gum things up and if you think about it are you're really saving anymore $$ at the pump? If it was me I'd build it for 89-93 pump gas since you already have enough injector for it. I'd do a return style fuel system and you probably don't need to go this large for a pump gas build but an Aeromotive Stealth 340 in tank fuel pump and one of their FPR's should be enough to support 500rwhp no problem! Ask yourself "Is it really worth all the extra time and expense to deal with E85 for a 10-15 hp gain NA?
E85 can often make less power NA if you don't truly need the octane because the fuel takes up more space in the combustion chamber. I wouldn't expect a power gain just because.
Last edited by spanks13; Feb 5, 2025 at 05:50 PM.
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From: Missouri
tbss is trailblazer ss, and yes, it would be for cathedral port if thats what heads you use not for rec port. being your building a truck my quick off top ove my head build would be iron block bore it .030 over get some summit forged pistons (shoot for 12.1 or better) and use the stock rods/crank and youd have a nice 370in short block to start with, then pick your heads/cam and a holley hi ram. id think more about a nice usable TQ curve than a strung out peeky rpm monster (unless you like lots ove gear 4.11 to 4.56) i mean its going in a porky truck after all. just an opinion any way.
Even at factory compression E85 nets decent power gains over pump fuel. Its usually 6-10%+ more power at the crank. A really healthy motor that is unable to run PK TQ timing on pump gas will pick up big from E85 alone.
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My power won’t be that high but I’m putting a 6.2 gen 3 motor and 4l80 in by 96 bronco. Ls3 heads and l92 manifold. Hooker black heart shorty manifolds. Cam motion titan 2 truck cam. Essentially it is their version of the truck Norris cam. This combo should make about 500hp on the motor. I built this for low and mid range as I’ll never really see over 4500 rpm.
I’d really do rectangle port heads and a L92 manifold. I’d reach out to cam motion for a custom cm pending what power and you’ll be living in. 500 whp is going to be difficult imo and be drivable.
I’d really do rectangle port heads and a L92 manifold. I’d reach out to cam motion for a custom cm pending what power and you’ll be living in. 500 whp is going to be difficult imo and be drivable.
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tbss is trailblazer ss, and yes, it would be for cathedral port if thats what heads you use not for rec port. being your building a truck my quick off top ove my head build would be iron block bore it .030 over get some summit forged pistons (shoot for 12.1 or better) and use the stock rods/crank and youd have a nice 370in short block to start with, then pick your heads/cam and a holley hi ram. id think more about a nice usable TQ curve than a strung out peeky rpm monster (unless you like lots ove gear 4.11 to 4.56) i mean its going in a porky truck after all. just an opinion any way.
