Quickin

Last night on "Rides" they showed the build-up of that motor part by part at the GM facility. It was the 620 hp 9:1 compression 572 engine. Thats about 525 RWHP.

They said they offer a 12:1 compression model that has 720 hp, so about 610 RWHP.

How is it that a 572 cubic inch engine with 12:1 compression makes only about 100 RWHP more than my MUCH smaller 436 11.3:1 cr, streetable, pump gas engine. Better heads, cam and better intake and I'm right there. And only 50 RWHP or so more than some of the other more powerful LSx based engines that are pump gas a daily drivers. (ie: LGM 06' Z06, Vince)

I would expect a monster BB to easily be putting down like 700-750 RWHP with no problem. MORE Performance has a 427 LS6 engine with 725 FWHP, more than a 572 BB race crate engine...doesn't make sense.



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1fastWS6

iTrader: (3)

Keep in mind these are CRATE motors. They're designed for the guy that wants to drop it in his car and just put gas in it or close to it and be ultra reliable. They're far from an all out custom race engine designed to make max. HP. Hell, my very basic 496 makes almost 100 hp more than the 572 race vesion.

Quickin

But its already 572 cubic inches and 12:1 cr. The intake a carbs are pretty badass and the heads outflow our heads by a long long way.

Where else are they going to do to get more power from that crate engine. What else can be done for them to put out more EXCEPT for raising compression? Cam upgrade only I guess? Because our compression is less than that 12:1 572 engine.


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orange88

iTrader: (1)

its called a warrenty

boostedinaz

iTrader: (2)

Exactly.

Not to mention the motor and heads are old designs and are no were as effcient as the LS style motors. We also dont knwo the specs or the cam or how well the heads flow. Just becasue it is a big motor doesnt mean it will make huge power. This is apples to oranges.

1fastWS6

iTrader: (3)

I'd bet a cam change would help that lazy 572 a LOT! But yes, also keep in mind you have a way more efficient engine alltogether than the BBC's 40+ year old technology.

Quickin

alright. So I guess a BBC made for the street as far as a pretty good idle goes could easily make 750-800 RWHP on pump gas?


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boostedinaz

iTrader: (2)

Making that kind of power in any motor on pump gas will never be easy. I think the main problem is that most people think, "it has large cubic inches it will just ooze power no matter what." This is not true. You would need to have a fairly large cam and heads that flow to make 1K HP out of a BBC. This will make it hard to due on pump gas and the idle will not be very smooth at all.

Are we talking N/A or going with FI?

Greg Fell

iTrader: (9)

If you put quality heads on a BBC (i.e. some nice AFR's), and cam it properly, it will stomp all over any lsx.

My next motor will be a short stroke, big bore (472ish ci) solid roller, and it will make a ton of rwhp n/a on pump gas.

PRAY HRD

iTrader: (119)

3 words for you.....Fast Times Motorworks! they offered to build me a 588 or 598 BBC, n/a pump gas motor that would cost about the same as that 572 race version, ($19-$20,000), with fuel inj., and make 950 fwhp!!! did i say using pump gas? well, i'm going a little bit of a different route now, but the motor of choice is still Fast Times based!

1fastWS6

iTrader: (3)

This is a good article from Hot Rod Mag. 1000+hp, pump gas

http://www.hotrod.com/howto/113_0206_1000/index.html

8GTOKLR

iTrader: (6)

Who cares if its a small difference and only makes 100 more or less ...did you see the motor abuse the tires on the chevelle and the sound "sigh" If you need more add 200 shot lol..GM has a quality drop in crate motor. If you wanted more i am sure you can spend a grand more and get a roller valvetrain. if you heard the guy making the motor they use the same heads as the 12:1 uses. Did I mention what that motor did to those tires....

tippmann243

arent big blocks know more for tq then HP?

Quickin

You talking about the show Rides? She was just power breaking it. I have the same power (+/- 10) as that 572 BBC they put in that Chevelle with my 436ci.

I didn't know you could send them extra cash and get a solid roller set up and better heads from the factory with 12:1. Now you'd be talking 800-900 hp.

boostedinaz

iTrader: (2)

Most anything with big cubes is know for torque. It all depends on how you set it up.

Quickin

Holy **** man, I love that sun-bitch. Too bad that won't fit into an F-Body.

Can that engine be made with fuel injection and make the same power?


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PRAY HRD

iTrader: (119)

BBC "WILL" fit into an F-body. that's a big part of how this forum got started, because it was my original plans to it. it's been done before by several others. and if you get the tune right, sure, you'll make the same power with EFI, and be a ton more efficient and divable too.

Quickin

Who does this type of work to get the engine in the car? I assume its alot of fabbing. Is there a kit?

Fast Times hasen't returned my e-mails yet. I see they advertise the 1000 hp/940 torqe engine on their websire home page. Is this basically the same type of engine as in the article? Do they tune it with fuel injection if you want that?

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PRAY HRD

iTrader: (119)

you'd have to talk to them about the specifics. and i can't imagine that there is a kit for this. there are a couple sponsors that sell k-members either with BBC/SBC mounting points, or without and mounts at all for a front and mid plate setup. headers would likely have to be fabbed. the only person i know off the top of my head who'd done this with success is BradyZ. find him and you'll find some great answers. and as far as i know, Fast Times closes at 5pm central dialy and closed on the weekends. but don't take my word for it.

Quickin

For some reason my e-mails came back to me and I didn't realize it til tonight. I resent it tonight and they got back to me in like 30 minutes, on a Sat. night

He said it can be done too, I'll be chating with them this week.