I'm surprised anyone offers a year protection on any high performance engine. There's too much that can go sideways that is beyond their control.
Stock or close to it, sure. But anything with 100 more HP than stock, I don't know......

 

Do you mind an iron block? A Chevy LSX454 with a cam swap is a dead simple solution without the 3rd party risk of an independent shop, and would make a ton more torque to move you down the road. Seat of the pants I bet the 454 would be more fun and make more tire smoke lol.

Looks like a complete crate engine minus intake, oilpan, electronics and accessories is $14,750 right now.

 

STOP it, you guys!!! This is funny stuff. Tipping hookers....LMAO.... $26 high end!! If I ever got that hard up, they'd only get one tip from me, and.......never mind....

 

That's why the top power producers (except that DOHC 670hp C8 engine) from the OEM are all pretty much FI, so I agree...

 

most places I’ve looked offer a 2yr warranty….

 

Of course it can be done. 427+ cubic inches with good cylinder heads and decent size cam. How and who you choose to purchase from or build it is another story, there are endless choices of builders, short blocks, long blocks, cylinder heads, camshaft brands, etc available

 

Yeah 700 flywheel is cake these days. Heck that 403 I did is a tad over 700 flywheel on pump gas…prolly 725+ on E85.

 

I'm in SoFlo, you have to tip for everything down here anymore. Everytime I go to Starbucks I feel violated, $7 for **** coffee and a tip, lol. That $26 professional...was that price with a coupon code or was it a door buster special? 🤣

 

Well, then I stand corrected. If that's the norm, then good deal!
Thank you, sir!

 

I'd do a new GM LS3 long block, and whatever blower setup fits under your hood. Add something like a BTR LS3 stage 1 V2 or LS3 stage 2 V2 cam and be done.

 

I have a Golen 454 in my C5. Only a couple hundred miles on it so far (if that) but no issues with it.
He was great to deal with over the phone before I bought, and answered a couple follow-up questions via email afterward.

Golen runs the engine on dyno before they ship it out, so you know it works. That was the key thing for my decision. I didn't want to have separate builder / installer / tuner all blaming each other if it blew up on day one.

I wonder how many of those 2-year-warranty companies will replace the engine if it blows up on day one, and how many would just blame the installer. Unless the motor was proven before it was installed, it might be hard to know whether it was built wrong or installed wrong. If you buy a full motor from Golen you know it was built right, because you have a video and the exhaust ports aren't pristine.

There might be other builders with engine dynos too of course, but Golen was the only one that had a proven recipe. He's also got a 454 in his own race car, which is nice.

 

You could achieve it with an LT4 very easily and it would drive great too. Main downside is the additional weight of the supercharger and heat exchanger parts.

We built an 11:1 416ci engine with 100% stock LS3 heads and intake/90mmTB/injectors and BTR Stage3 cam with crappy mid length headers backed by a crush bent 2.5" exhaust and it made 560rhwp thru a T56 Magnum and 335/30/18 rear tires. He wanted more so a few months later he had the intake ported and rod modded, same 90mm TB, hand ported heads by a local porting guru, custom cam, 3" dual exhaust and it made something like 595rwhp. That would be the most budget way to get to 700hp flywheel. This is the truck:
It now sports an AHP 442 LS that makes just under 800hp but that was close to $30K with the Dailey billet dry sump setup, plus new wheels, bigger brakes, IRS 9", all kinds of additional mods.

 

I appreciate all the feedback guys. LT engines are not an option because I already have a swap kit for LS and nice 1 7/8 LS headers. I also don’t want FI ((even though it would be nice) because an FI setup adds up quick $$$. I also have a brand new 4l80e rated for 750hp.

I think its going to come down to Golen or Shafiroff. I’ve tried messaging Golen a few days ago but haven’t heard back. I’ll try calling him next week and talking. I think my best bet is a 454 or 427. Out of curiosity why all the hate for Borowski?

 

I notice the Golen engines use 5/16 pushrods…….That seems awfully small diameter. Hell my gen1 383 stroker uses 3/8”

 

I used some thick wall 5/16 manton rods on a 8500rpm LS7 with heavy stainless valves and it was very stable. Springs were a touch over 500lbs open.

 

We used 5/16 in my engine posted above. It runs just as it should. No issues. I upgraded to 11/32 only because I had already paid for them from Tony.

 

I did a thick wall 3/8 to 5/16 taper pushrod from Manton on a solid roller cam with beefy 1237x springs 585 lb open maybe more with the lift I have. I needed the taper for clearance at the cylinder head. Ran out to 7800.

 

Agreed. I don't think it takes much to get there. You basically have to blindfold yourself to get this wrong I think.

No idea what my 408 is going to do, but I guarantee the 700 fwhp mark was surpassed easily.

 

I say 454

My LSX 427 11.5:1 on 93 octane is not making 700 fwhp maybe 650 fwhp and dynoed 540 rwhp @ 6200 rpm and 500 rwtq @ 5100 rpm.

CamMotion 243/251 115+4 .661 and .633
LME cnc ported Brodix BR7's 265cc cylinder heads
FAST LSXR 102
NW 102
KOOKS 2" headers with 3" TDE

I'm certain 700 fwhp can be made with a 427 but it will take more cam and larger cylinder heads to get there. I'd say there's 30K invested in the engine alone and that was ten years ago. If I had went the CID route I'm certain that I would have eclipsed 700 fwhp.

 

I think if you go onto the BTR website or Texas Speed website and look up their stage 4 cam they have a 700 flywheel hp 427 build as the dyno for the cams they call the stage 4. It has old stage 4 and the new stage 4 which I think made like 10-15 more hp.