poor mans LS7 454 build

[@timoneal9654]

Nice job. So very close in setup to a motor I just purchased. Recently I stopped by my machine shop to price-out a solid bracket race motor in the 572 - 632 CI range. Starting with an aftermarket block we came in around $14k before assembly. Your numbers are very real. It adds up quick.

[@adamwinters4448]

Thank you for taking the time to do this..,its been helpful.. my moterhome has a forged crank aswell., I'm just giving it a fresh rebuild and a little extra power..putting it back in the moterhome

[@GJ-DT]

That aint no poor man's ls7, 600 hp for sure.

[@ls6nova398]

Honestly from the builds that I've seen I would say 650 hp isn't out of the question especially with that high of compression compression.

[@joeyjenks2971]

Nice work, your the Best, I don't think you will have a hard time selling it That's for sure and if anyone else out there also Thinks he's the Best please give him a thumbs up too Thank you from Joey in Honolulu Hawaii Aloha 😎

[@dresonn4504]

Very badass build. Im building something similar now i have a good idea of what i want in my build so thanks!

[@Don.E.63]

Man thats gonna be a fine engine for something, i had one very similar back in the before kids days, love the rat motors, good job!

[@bigblockkings1031]

I think you've done a good job on that. Still building motors? Big Block Kings! 👍😎

[@shawnramsay1851]

Awesome build Brian!!! Fellow engine guy here just say Why - And though lol

[@curtfreeman8632]

Sounds great brother! My guess on hp would be 600-650.

[@Anarchy-Is-Liberty]

Damned shame the mic is a potato! Awesome build! That's a killer price for the engine.

[@kentuckyrain2223]

Talk about wakeing up the neighbor hood 💪 🏁🏁🏁

[@JoseGomez-ex8kr]

Awesome build man

[@kennethwashington854]

Worth every bit of $1800 , i love it

[@billythomas2808]

He said 8300

[@jasonwells2988]

I’ve tore apart 2 motor home engines that was 2 bolt main steel crank from the factory.

[@haydenspence6952]

Nice engine.

[@ReshardsAutomotiveWorkshop]

I hope you have it sold.

[@LSMykie]

Hey I would like an engine built from the block up can you help I have found the rotating assembly for a 454 lsx pistons are 4.188

[@derekthegreat1114]

Sounds good!!

[@raysason4838]

My uncle builds budget build454usen every thing stock but cam pistons intake dyno550with original heads mix fuel 3500$runs11:50s on motor stock gbody7.5rear posi bigger axles7500for car

[@jeffs.4432]

sounds very healthy!

[@davidtappe5337]

Cool.

[@foolazz84]

Sweet

[@shitbox7413]

So what’s the actual bore size and compression? What was the total build investment?

[@johnpotsch7349]

Stock 454 BBC is a 4.25" bore & 4.0" stroke. I Had One. My Dad was a car collector. XCH was a GM over the counter long block sold back in the 70s to the early 90s. Your Choices for Heads were aluminum 074s, 077s and 990 Iron heads. My Dad bought a 77 RS new from a lot and pulled the LG3 305 out and put in the XCH. IT had TRW 12.25:1 domed pistons. Forged factory rods. Forged steel crank. The block was a 4 bolt #1959. I had 990 heads and a Edelbrock TM2R twisted intake. 850 Holley DP. It needed at least 100 octane and the timing was in the 40 degree area. I was going to rebuild it and replace the heads with a set of AFR or Brodix with somewhat smaller ports to get my velocity up at lower rpms. In hindsight I should have converted it to a E-85 build and Just improved the Heads and cam. It could have been a easy 600 hp engine. At least I still have the 77 RS. Only car I got that was my Dads. Was garaged all of it's life and still only has 118 original miles. I was somewhat concerned what a 7000 RPM 454 making 600 HP would do to a unibody car without major chassis mods. I couldn't afford race gas, so I sold it and decided to build a street friendly 355 with 10.4 static compression that makes about 425HP and 450 ft pounds. working on finishing it up now. Still need to get sub-frame connectors.

[@shitbox7413]

John Potsch, Thanks for spending half of your day typing that, thanks anyway. 👍🏻

[@danh.122]

@@johnpotsch7349 I'm building a 454 with 077 heads and a GM rec port intake (both with the winters casting marks). With the chrome repo GM style valve covers, it'll look like the over the counter L88 you could buy from your GM dealer back in the 70s. Internally it got 4 bolt mains, forged GM crank, 6.385 rods, 10.2 forged pistons and a .589/.600 roller cam. In my mind it's a poor man's LS7 and it'll go front of a Doug Nash 5 speed. Next I'll need to build a 1970s style hot rod to put it in.

[@frostworxpcrepairrecycling4720]

id buy it in a heartbeat for my new project but the wife says all the tax money this year has to go to the new family vehicle!! :(

[@chrisbohte4956]

8300 cheap is 2500 that aint no poor mans engine

[@bbd468]

I think he has the wrong idea of what qualifies as "Poor Man's" these days. Thats an Expensive Motor for some of us.😂

[@therocketshop]

my price is Canadian dollars.

[@bbd468]

@@therocketshop Damn, thats eve Worse! I was just Playing tho. ;))

[@dresonn4504]

Pump gas?

[@chele-chele]

No way, I run my LS7 on 104 LL without detonation but at 12.5:1 you won't get by on 94 octane

[@tonymorse7178]

Say "why-and" not wee-ann

[@Martin750hp]

Open plane intake some kind of chinese one? No non American Parts on an LS-7 that i know of? Whats wrong with an AMERICAN open plane intake, come on mister take a little more time to find one........

[@yourmom705]

as much as we dislike china. they always have good affordable parts for everything

[@chrisbohte4956]

Not so budget only cheap out on machine work

[@alexandrosfilth7042]

*GAWK*

[@jeffrey4547]

L.S.7 was a small block and it is 427 cubic inch only the L.S. 6 454 small block again because L.S. never built a big block in history quit listen to these idiot on the net fact check me at L.S. web sight and look at a L.S. engine that will tell u , u have no idea what ur talking about plus they are roller engine since 1970 from factory all are small blocks and they look nothing like a chevy engine

[@ronaldlewis4032]

Excuse me Chevrolet did have a LS7 454 that was not installed in public cars . How ever you could purchase one for racing purposes! The LS6 came in 70 model chevelle and Corvette! In today's world you can put a hydraulic roller and a good set of heads on a 454 and pass up the big bad LS motors! I got 2 5.3s setting in the shop with 862 on one and 243 heads on the other! Probably could build one of them to make about 450 hp ! I'm staying Big Block Chevy lol

[@angeloparis7963]

A secondhand Chinese single plane intake ?????? C'mon. You could've done way better than that. And if the cam doesn't approach a GM race spec you have wasted an opportunity. Thumbs down on this.