Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

BBC vs LSx 454ci......N/A

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Old 01-03-2009, 07:44 PM
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Originally Posted by zones89rs
awesome juiced, like my new sig?
lol!!!!!!!!!!!!!!!!!!!
Old 01-03-2009, 08:19 PM
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Heh, glad you like it.

As for the post...

BBC makes more power, end of story
Old 01-03-2009, 08:33 PM
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Originally Posted by dmracing
Not true a purpose built big cube ls motor with good parts can meet your goal. What is your budget?
Nobody can build a 93 octane pump gas daily drivable LSx or LSX engine that makes 800 RWHP. Can't be done without FI, and if you use spray you'll need race gas because that shot would have to be 200+.
Old 01-03-2009, 08:36 PM
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Originally Posted by ZONES89RS
BBC makes more power, end of story
and for less money, better reliability, longer life, tons more torque and many more options if you want to increase the power. That's if you get bored of 1,000 N/A HP and 1,400 on spray

And yeah, weight is meaningless to talk about when you're going in a straight line and its just a street/strip fun car that you aren't using for competition.
Old 01-03-2009, 11:09 PM
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YEA AND IF YOU PLAY YOUR CARD RIGHT THERES SUPPOSED TO BE A 540+ ci LS BASED BLOCK THAT IM LOOKING INTO FROM RHS[RACING HEAD SERVICE]/COMPCAMS
Old 01-04-2009, 02:12 AM
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Originally Posted by TT610INCH
YEA AND IF YOU PLAY YOUR CARD RIGHT THERES SUPPOSED TO BE A 540+ ci LS BASED BLOCK THAT IM LOOKING INTO FROM RHS[RACING HEAD SERVICE]/COMPCAMS
That would be pretty cool, but a 540ci BBC would still crush it because of the far surperior BBC heads.
Old 01-04-2009, 09:19 AM
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A friend of mine swapped a BBC into his '95 Formula. The exhaust was the only thing that was truly difficult. The motor sits on custom motor mounts (no plates), and he installed it so that the back of the motor was exactly at the same place as the back of the LT1 that was in there. This way he didn't need to alter the tranny crossmember, or change the driveshaft length. Some trimming was required around the cowl (obviously) for the distributor, and he runs a cowl hood for the Dominator carb. It fits in surprisingly well. He told me that out-of-the-box headers for a '67 big-block Chevelle are damn close to fitting into a 4th gen. Only a few tubes need to be cut/tweaked.

Here's a pic of it, it's the red one:



It's the only pic I have of it, sorry.
Old 01-04-2009, 01:54 PM
  #128  
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Originally Posted by TT610INCH
YEA AND IF YOU PLAY YOUR CARD RIGHT THERES SUPPOSED TO BE A 540+ ci LS BASED BLOCK THAT IM LOOKING INTO FROM RHS[RACING HEAD SERVICE]/COMPCAMS
Yeeaaaa...that is still not **** on the 632 BBC offered by SEVERAL companies.
Old 01-10-2009, 03:18 PM
  #129  
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Here is a comparison test from GM with their crate motors in the same car. It gives you weight differences, gear ratio's used, HP/TQ differences, and best 1/4 mile times with ET's. http://www.gmperformanceparts.com/Ex...motorshootout/
Old 01-12-2009, 10:16 PM
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I think the way of the future is forced induction.

It’s the best of all worlds

Take the 454 lsx and all the cash that goes into it, get your 600rwhp.
Or the 5xx big block with the 800 rwhp and all the gas that it takes to cruse around town.

Now take a look at my 346 twin turbo. 600rwhp when you need it.
only 8lbs boost, budget build - (semi)
AC / full comfort / electric cutouts (so you can sound like a top fuel drag car when you feel like it.) and It gets 24mph average on the hi way at 80mph.

600rwhp - 24mpg.- (NJ to FL and back - 6 speed)

Being that I am an old school big block guy, I am gathering parts to build a 454zl1 twin turbo, fuel injection 800rwhp street car. (Because big blocks are the best, lets face it)

I think everyone should consider turbocharging when building a car for the street. Simply because you can cruse around town essentially with a stock motor with very tame manners until you spool that bitch up.
Attached Thumbnails BBC vs LSx 454ci......N/A-img_9063.jpg  
Old 01-12-2009, 10:41 PM
  #131  
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anyone think this is a good deal, i rescetly saw ina catalog this company sells 454 BBs making mid 400s an up horse an torque numbers. They come with a 50,00omile or 5year warranty on them for $4500
Old 01-12-2009, 10:45 PM
  #132  
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Depends on what you can do yourself, oy umight be able to build a nastier motor yourself if you have the ability.

Originally Posted by TTSSZ
I think the way of the future is forced induction.

It’s the best of all worlds

Take the 454 lsx and all the cash that goes into it, get your 600rwhp.
Or the 5xx big block with the 800 rwhp and all the gas that it takes to cruse around town.

Now take a look at my 346 twin turbo. 600rwhp when you need it.
only 8lbs boost, budget build - (semi)
AC / full comfort / electric cutouts (so you can sound like a top fuel drag car when you feel like it.) and It gets 24mph average on the hi way at 80mph.

600rwhp - 24mpg.- (NJ to FL and back - 6 speed)

Being that I am an old school big block guy, I am gathering parts to build a 454zl1 twin turbo, fuel injection 800rwhp street car. (Because big blocks are the best, lets face it)

I think everyone should consider turbocharging when building a car for the street. Simply because you can cruse around town essentially with a stock motor with very tame manners until you spool that bitch up.

Turbo and budget are not in the same sentence for me, i can go NA all day with a shot of dope for cheap as hell. Not to mention, a cammed out big block will always sound better at a stop light over a turbo. The turbo sounds sick as hell spooling up though.
Old 01-13-2009, 04:37 PM
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I would say that LSX, never been a fan of the BBC. All of the BBC's we've owned never had that notorious "big block power." Tehre is even one in town that claims to have 500 horse(sounds stout), but my 1996 k1500 z-71 with the 5.7 vortec will stay even with him.
Old 01-13-2009, 09:14 PM
  #134  
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So, there is a redneck that smokes dope and thinks his big block TBI is making power? That is what you are trying to say?
Old 01-13-2009, 09:17 PM
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That’s true. I try to use mostly used parts.
I'm searching for deals every day.
I always find the killer deals.

I've never run the n2o- I have nothing against it. Some day I hope to need it to spool a way too big turbo for the launch at the track. (I have turbo on the brain).
How do you work it? You have it ready to go at all times, or on days you leave the garage feeling a little frisky. It’s worth a few more dollars to me to never have to think about it. FI is always ready, never empty.

I think you can get 100,000mi or better out of a big block at 10lbs 800rwhp.
---on a 95% street car--- with a 502 crate motor, with upgraded valve train, iron exhaust manifolds and a good fuel system.

Grand nationals were going 100,000 pushing that v6 at 8 to 10 lbs.

I have 20,000 on my 02ss and I have changed the oil and once the plugs.
It has an incon twin turbo system. (Same engineer who designed the new APS ls1 kits)
The thing that made that system grate is the cast iron manifolds. You loose a few hp over turbo headers but they last forever where the headers will crack.

The trick to saving money and adding long term durability to a big block system is using iron truck exhaust manifolds. Flip them over make 3" flange adapters and you just saved 3 to 5 grand right off the top from not buying custom turbo headers. There is a year/type that are symmetrical and fit just right in a camaro / chevelle / nova. I forget witch ones, I have a set, and I will see if there is a no. on them. I got them on e-bay for 44 dollars.


What about a cammed out big block twin turbo when the light turns green.







Originally Posted by ZONES89RS
Depends on what you can do yourself, oy umight be able to build a nastier motor yourself if you have the ability.




Turbo and budget are not in the same sentence for me, i can go NA all day with a shot of dope for cheap as hell. Not to mention, a cammed out big block will always sound better at a stop light over a turbo. The turbo sounds sick as hell spooling up though.
Old 01-14-2009, 05:36 AM
  #136  
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Originally Posted by ZONES89RS
So, there is a redneck that smokes dope and thinks his big block TBI is making power? That is what you are trying to say?
No sir, it's carbuerated(sp). It has a lopey cam and edelbrock aluminum heads, and is a 468. That's all I know. But yes, he thinks he is making power.
Old 01-14-2009, 09:31 AM
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Originally Posted by the_husk
No sir, it's carbuerated(sp). It has a lopey cam and edelbrock aluminum heads, and is a 468. That's all I know. But yes, he thinks he is making power.
with a good reworked heads like AFR and a good cam and intake manifold with the bolt-ons the 468ci BBC will make big power and a bigger ci BBC will make even more power. i still say that BBC with a good parts will easily make more power than LSX engines.

i don't like edelbrock heads for BBC and SBC they don't make that much power, maybe except for the victor JR heads.
Old 01-14-2009, 11:08 AM
  #138  
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Originally Posted by TTSSZ

What about a cammed out big block twin turbo when the light turns green.

Wel, i have yet to see a FI car cam the way a nasty *** solid roller car does, so it is one or the other for me. I love FI, but i have a budget that allows dope fed rides, i already have the kit i purchased for 150$ brand new that is good for 175, then the second kit i bought for 275$ used with:the kit, bottle warmer, purge kit, MSD timing retard box, remote and a couple of other odds and ends. So, i can make over 300+ extra HP for the 425$ pluss filling the bottles, 20$ a bottle. Not too bad. I dont see any budget turbos under 3000$, but one day, if i ever get a job that can swing it, i probably will
Old 01-14-2009, 02:58 PM
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There was a 427 LSX that just put down 800hp N/A on the engine dyno if I remember right.

Pretty much track only.

The LSX world is still evolving but the future is cubes and FI.

The nitrous world is still there and will allways be there because it spower for cheap. Now once you get into the big dog shots then its not really cheap lol. The main advantage is the weight savings. If people start investing a lot more money into weight savings I think the nitrous cars will START to become compeditive with the turbo/blower cars again.

Im going forced induction... all I am going to say on that....

I have heard some pretty nasty FI sollid roller cars. With the turbos the the turbo(s) muffle a lot of the sound.

My old sollid roller motor sounded SICK, everyone said it sounded like a angry pissed off popcorn machine on steroids... going threw an open exhaust helps a lot.
Old 01-14-2009, 04:35 PM
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my buddy works for a diesel shop where they do load dynos, he drives like a 99 gmc pick up witha 454 vortec its makes more horse an torque then most of the diesel pick ups down there


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