I got this idea from conversation in another thread

What do you feel is the baddest factory produced long block set-up.
Im not looking for what CAN be built....looking for PRODUCTION!
A motor that you could change the cam(s), or upgrade the blower, or add a turbo to, put a pile of spray on, or all of them and know that its not ready to bust the seams at 4-500hp. Doesnt have to be a Ford or Chebby, could even be an import. Accessible to the average man, no exotic million dollar junk.

Let hear it!!!

 

My vote is for the old 427/425 FE.
that motor was WWWWAAAAAAYYYYYYY under rated and responed like a mofo to mods!

 

Now say throw a heatlhy shot of spray on it, what's the stock internals good too? 5-6-700hp?

 

Ford and non-Ford:

Ford: 03/04 motor. Guys have made 1K on the stock longblock.

Non-Ford: 2JZ

 

I think the factory GT500 motor could probably win this debate, even eclipsing the Supra 2JZ. With a blower swap and pump gas friendly boost, I have personally seen over 700rwhp. If you put the coals to it, I'm sure over 1000rwhp would be attainable with a factory stock long block.

YouTube - Evolution Performance, Inc - Shelby GT500 Runs 9.34@147mph

Here is a link to some guys going low 9's with a stock motor. This is a little dated, and people may have gone faster by now.

Brian
EFI-Unlimited

 

RB26DETT - non ford
terminator - ford.

even though LS series motors tend to react well to H/C/I very well..

 

The Ford GT and Shelby GT500 5.4 motors easily make the most HP from the factory. Both long blocks have sustained 1000 WHP to the ground with only induction mods. So hands down winner but,.. arguably so.

In the 60's Shelby sold 427 Cobra's equipped with Paxton superchargers making 600 - 700hp. Billy Cosby was an original owner of one of those Cobra's. He made a skit about t and how the car scared the crap out of him. He also bought one of only 2 known factory sponsored 68 Shelby GT500 428 cars that had dual Paxton superchargers and the car was supposed to be making 700hp. My memory is foggy about the other car. It was either one of Carrol Shelby's personal cars or it went to a factory rep and was never registered.

And its hard to pass up on some of the classic top list mentions.

The Boss429.
375hp GROSS in factory trim. Thats about 300 NET hp in todays measurements. But Ford deliberately castrated the engine for the street (These engines were built for sustained high RPM on Nascar tracks to compete with the 426 Hemi)(The engines only made it into the Mustangs because they needed 500 cars sold to meet Nascar rules). What Ford did to the street cars was sacralidge. They put peanut sized exhaust manifolds on them, a restrictive low rise dual plane intake with a very small carb on it. The Boss 302 had a larger carb! And the cam in it would not make any power beyond 4800 rpm,.. at 5000 the engines fell on their face. They made little low end torque. A stock 428 car would jump them at the line and then freight train them on the big end. But,.. These engines had forged cranks, rods and pistons, with the right solid lifter cam, headers and the right intake and carb/s. The heads in these engines came to life after 5500 RPM and made gobs of HP at 7000 RPM. No other big block was built to sustain 7000 - 8000 RPM like these motors were built to handle. These engines could make 600 - 650hp NA. No other engine,.. not even the mighty 426 Hemi or solid lifter 454 LS6 from GM could match that. And truth be known,.. the 1970 Buick Stage 3 455 made more hp than the LS6.

I hold a high regard for the 428 and 427. I never had a 427 car but I have owned a 69 Shelby GT500 and a 69 Mach1 SCJ R car. The Mach1 was much faster,.. it had a dual carb 428, 4 spd and 4.30 rear gear. I never ran it down the 1/4 mile,.. but I did make some 7.8/7.9 @93/94 1/8 mi passes. That was bone stock, open headers. Easily an 11 second car in the 1/4.

Another honorable mention should be the early 460 engines. In stock form even with DOVE heads they are pretty weak,.. just torque monsters. But with SCJ heads these engines can make 600 hp NA and have held 700 - 800 hp on stock crank and rods.

Hurst

 

any of the LSx motors. they are lightweight, compact, easy to mod, and very effiecent motors

 

actually the 427 tripower (maybe 68?) made 435 and was well known to be underrated for insurance purposes. actually over 535 if I remember correctly (had one )
big blocks aren't normally meant for high rshared_pm use unless built as a dedicated high rshared_pm motor. A lot of my friends and my dad (circle track racer) all ran big block chevy's back in the day, I've also had a factory experimental 396 in a 70 chevelle, a 402 built by Zorians that used to be in our stock car before they dropped cubic inch limits that was put in our tow vehicle, and 4 big block vettes (2 427's and 2 454's).
sadly, I'm not the best educated when it comes to this, just from growing up with them. It took foxbody mustangs to drag me out of chevy's!

although I believe the termi block for a domestic probably the best to build from.

 

2jz!
no shit ^^^