BigBronco

iTrader: (2)

Cylinder heads were an older factory style Pro Topline Aluminum head on a 514" Bowtie BBC block.

All titanium pieces, Xceldyne Ti valves, etc. Mind you, this was a 14:1 compression motor that was also utilizing a Super Victor intake with a 4500 HP Holley that was built by Braswell.

Camshaft was a solid roller from Comp Cams. I believe the specs were 285/295 @ .050 with .900" lift on the intake and .850 on the exhaust side. Offset rocker sizes though that were 1.90 on the intake and 1.80 on the exhaust side. Big triple springs built by PAC. Motor did start life as a 700 horsepower hydraulic flat tappet motor that performed really well in the NMCA Factory Street class. (Flat tappet cam, 477" -8 factory styled cylinder heads and the car still made over 660 rwhp through the TH400. LOL)

HioSSilver

iTrader: (8)

A bolt-on internally stock bbc?..If so that's cool. My car weighs 3100, it is complete with all sounddeading and creature comforts. It has been creativly lightened.

HioSSilver

iTrader: (8)

Probally not gonna be a problem to do it N/A when the bolt-on ls7 goes in. Keep in mind these are stock ls motors to your h/c bbc. My comment were in retaliation....I spit the truth, sometimes it ruffles feathers.

ElkySS

iTrader: (6)

imho, ls1s are better for a balanced street car but when it comes to making hp and going all out bbc is king. i really dont see how that can be argued (at least the last half)

99peweterls1

iTrader: (1)

No ruffled feathers here, I just cant come to grips on how someone would think that a bigger bore, bigger stroke motor will not make more power than the smaller block!?

P.Wallnuts

I just sold a set of these, they were one of the later castings with the D port exhaust chamber. They had some port and pollish work and in the past had made right around 700hp at 6800rpm on a 468 with a 270-something duration cam and somewhere between 11 and 12 to 1 compression, so I agree these would definetly be a good option.

I don't have A/C or cruise because I choose not to even though my 73 Camaro was a factory A/C car. I don't drive it to the track because it's 120 miles from my house and I wouldn't drive anything that far to go race it when I have a perfectly good truck and trailer, but that's not to say I couldn't because I have definetely put plenty of miles on it with no problems. Last spring, having never driven the car (which looked like it would never even make it down the track) more than 30mph around my neighborhood I took it to the track and made three passes, on the third it went 11.85@116.2 cam and bolt ons only with steel heads being timed by ear and with an out of the box Holley 830hp, comletely untuned. I guarantee it will go at least low 11s this year and I am going to drive it to the track at least once this year with a few friends just to say that I can.

HioSSilver

iTrader: (8)

Cool good running car! No one around here drives their bb anything cars unless it's to a show. You have the typical bb race cars at the track....but to make a dragrace car go fast is easy and I don't pay much mind to them. My car has to pull several duties....or I basically don't want it.

93Z2871805

iTrader: (5)

This guy drives his, It's a 565 with twin 88s, enjoy-

https://ls1tech.com/forums/multimedi...rip-video.html

OP are you allowed to run anything for a manifold? I understand block/heads are restricted, but what else?

s346k

iTrader: (4)

wow. i don't recall anyone saying a damn thing about driving a car anywhere with cruise or a/c. how the hell did they get brought up in conversation about a bbc capable of 8000 rpm?

money and lots of it is what it will take. once you have the 40 grand needed, call a reputable shop and have them assemble it for you.

the quickest/fastest "street" car (and i use the term loosely) that i know of around here is *gasp* a bbc. dude drives it everywhere. it's a pump gas car that runs 8.60s on a dot tire. i love lsx engines. i eat, sleep, and dream of them every day. but no matter how it's played, there will always be someone skull dragging every car you can find...and that guy has a big block setup of some sort.

HioSSilver

iTrader: (8)

Here ya go, their most powerful crate engine ever
http://www.gmperformanceparts.com/pdf/LSX454R.pdf

93Z2871805

iTrader: (5)

Very true indeed. GMs highest CLAIMED power LSX engine. Not crate engines in general, just GMs. At 13:1 compression it's 720/720.

This was the stock 572/620 on the dyno at 9.6:1 compression - 700hp/710tq
http://www.chevyhiperformance.com/te...lock/dyno.html

Hot Rod Magazine did a dyno test of the stock 572/720R in the June '04 issue, "King Crate" where it made 787hp/725tq on pump gas and 27* timing, then 801hp/738tq on 110 octane with 32* timing. Sorry, but I couldn't get the link for you as the article is 7 years old.

HioSSilver

iTrader: (8)

read it again and try to comprehend....They said
720+ HP @ 6000 rpm
720+ LB-FT @ 4500 rpm
Quite Simply the Most Powerful LS Crate Engine Ever from GMPP!
Drag racers take note! GM Performance Parts’ new LSX454R crate engine delivers more than 720 horsepower that will help you stay in front of the competition. More than the most powerful LS engine in our portfolio, it is the most powerful crate engine we’ve ever offered!

93Z2871805

iTrader: (5)

I comprehend just fine, the target is at least 720/720 with 13:1 compression. We'll see if it can break 801hp/738tq naturally aspirated on the dyno.

I also comprehend that you sir are dancing around the point by trying to change the debate to MPG, whether it's a GM crate motor, weight, and what new sales pitch they use. Face it the LS is not the most powerful engine ever made and the BBC can, and will always, make more power. Just because YOU have a particular engine doesn't mean it's the best.

HioSSilver

iTrader: (8)

If you did read and comprehend then you would have noticed the the 572 720r makes 685 torque compared to 720+ torque (as rated) of the LSX 454 (their most powerful crate engine ever). One has 12:1 the other has 13:1 which means they both need race gas. That makes the LSX more powerful, not a sales pitch. Or since you are the way you are you could choose not to beleive either.
Hell I can't wait for them them to make a better all round package than what I have. I'll go straight out and buy it. I'm not changing anything just stateing facts, and when in fact you find a bbc to be anybetter all round than a ls.....then post it up.

HioSSilver

iTrader: (8)

If bbc's are so great should'nt you be swapping in one of those in your camaro instead of a ls?

93Z2871805

iTrader: (5)

I was trying to tell you in my previous post Hot rod tested the 572/720R at 12:1, then backed up the timing to 27 degrees, and made 787hp/725tq on pump gas. I'm putting a Gen III in my 4th gen and not a BBC because of a few reasons. 1) The torque of a BBC would twist this car in two, if I wanted a 7 second car I would. 2) The engine bay is cramped and plugs are hard enough to change with the LT1, 3) I just want something different, I already have a BBC car, and plans for another one when the 93 is done.

HioSSilver

iTrader: (8)

The 572 is still rated at 720 from gm....so I guess your saying that the LSX could be underated to and make even more power than the 572......good call, I like it. Maybe someone will do a independat test of the LSX.
On the subject of your 93.....I can tell you that car is built WAY better than anything gm ever put a bbc in.....so I would'nt worry about twisting it.

Parasoth

iTrader: (1)

Who gives a **** about crate motors?

Did you even notice that the BBC was dyno'd on pump gas (Post #71) and still made the advertised horsepower? I guarantee that LSX wont do that. So now were comparing race gas crate motors to pump gas crate motors. Do you honestly think backing the timing down on 13:1 will be able to run pump gas? HAHAHA.

HioSSilver, with you riding nuts on crate motors so much, I literally do not beleive you worked for ANY shop for ANY number of years that was worth a damn because crate motors are for suckers, or people who need an insurance claim.

I went through your posts, and all you do is cheddar-cheese your cars while running a full race clutch and think your car is some kind of badass. I COMPLETELY see why your car gets what it gets, and it's pathetic you resorted to that and still go on about "daily driver, AC, 30 MPG".

I wouldn't drive your car on the street to the crusher. And 9/10 people wouldn't daily-drive a SOFT LOC, FACE PLATED T-56. Why is it you don't post these two mods in your sig?

Because noone would give a **** about your times if you did and you can make yourself seem a lot better driver. I even thought you were a damn good driver until I read you use a soft-loc clutch and a face-plated trans. If you can't drive a manual with these two baby-sitters on your car, you just suck.

I don't give a **** if your man-woman drives your car on the street either.

Im going to quote something that shut you up once.

I've reported you for flame bait. I hope you take a vacation, but I know it won't go that far.

93Z2871805

iTrader: (5)

OP I'm sorry your thread took such a detour.

HioSSilver, if you would like to continue discussing the finer points of the BBC please feel free to start a thread in the appropriate section of the forum. I'll see you there!

Parasoth

iTrader: (1)

93Z: Im requesting the thread be cleaned up, even my posts be deleted, this thread has some GOOD information in it pertaining to spinning over 8k but you gotta sift through the idiot replies. Would like to keep it going as well.