streetassasin

iTrader: (30)

So when built whick one would have more power reliability ect?

'Trust'

iTrader: (24)

Definately an LS1

~JOSHUA

iTrader: (92)

LSx rules.

It's way more efficient, it comes with 15 degree heads with killer airflow from the factory, has an aluminum block (100 lbs less than iron) which is a $2500 purchase on the gen I engines, 6 1/8" rods, short skirt pistons, 6 bolt mains, 1 coil for each spark plug = 7,000+ rpm of reliable ignition,

I could keep going but I need to get back to work. ~Joshua

NoFive0

When fully built...I'd say the Gen I. There is a way bigger aftermarket for that motor.

~JOSHUA

iTrader: (92)

How about a fully built 454 ci Gen III C5R?

Do you know what those put out?


Not just power, but in a lightweight package.

NoFive0

True...what about a fully built 472 sbc. Just kidding, but seriously...I think that both engines full tilt could be in the same range...all motor.

00454sscamaro

ill take both. got one of each.. they both got there ups and downs. gen1 is easier to work on and cheaper to build power if you ask me. i added parts to my carburated 84 z28 got more hp then my ls1 had stock and at the moment. the whole engine out of the z28 with aftermarket parts is cheaper then ive seen used ls1's go for... i still like the ls1 alil better though, its a better starting point..the ignition alone is enough reason to go ls1 for me.

mccollum_007

iTrader: (4)

I have both as well and would take the '74 with the 355 in it over my LS1 just for the simple fact that when it comes to all out drag racing it is a whole lot easier to work on. Now I will say you can get a ton of power out of an LSx motor and still be a lot more realiable than an SBC and with a pcm you can pinpoint problems a lot easier but still not enough to convince me otherwise.

1994Z28Lt1

iTrader: (1)

no offence but that is kind of a stupid argument, sure the lsx motors are light years ahead of any of the the stock sbc motors but come on, the aftermarket is so large for the sbc with aftermarket blocks where the sky is the limit, i know it is quite large for the lsx motors as well with aftermarket blocks heads whatever

but when it comes down to it if you have two motors with equal flow capabilities and similar displacement they are going to put out very similar power figures

take the LS1 and LT1 for instance if they both flowing 300 cfm intake and 200 through the exhaust have similar cam profiles similar exhaust they are both going to put out similar power with slight differences in torque and power curves due to bore/stroke, rod ratios, rpm limitations but in the end it will be damn close

the only difference being the ls1 in factory specs is a hell of a lot closer to that than the lt1 is from the factory but when they have equivalent parts its whole different ball game

RPM WS6

iTrader: (3)

Assuming the Gen 1 is going to stay carbed, I'd have to go with the LS-series. Simply because, either can be built to make the same amount of power or torque, but you can't beat the driveability and reliablility of modern fuel injection. Even if you go with an aftermarket EFI setup on an old carbed 350, you'll still be missing a lot of the electronics and ignition components that make the GenIII+ so much more reliable and driveable.

I'd always rather have the LS1/2/4/6/7 for a street car. For an all out race car, I'm not even sure it matters. Things like streetability and idle quality just don't matter at that point, so pick whichever you'd rather build.

'Trust'

iTrader: (24)

By what he said.. "more power reliability" I assume he means power and reliability, both motors maxed out will not be reliable, but you have to admit that the LS1 is moreso than the SBC at almost every power level. Given they are harder to work on, tune, etc. But you cannot beat full blown Fuel Injection combined with the technology in the LS1's or any modern day car.

TheBlurLS1

iTrader: (8)

A 470hp SBC is ***** out.

A 470hp LSx is cam only.

/thread

PS - LSx prices are coming down, performance and knowledge are going up. SAM just built the first 500 cubic inch LS1 and it makes over 700hp on pump gas. Not bad for only being around for 9 years.

The good thing about having a not-so-huge aftermarket base is not having the compatibility problems facing many of the old SBC motors. The builders have adapted different designs over the years trying to make a little more power, that it seems like a frankenstein story trying to build a fast one. The LSx replaced the SBC, had to be a little reasoning behind that.

98FiveSeven

iTrader: (1)

engine to engine neither are harder to work on when they are on a stand. You can put a "easy to work on" gen 1 in a 4th gen fbody and it wouldnt be easy to work on.

i would go LSx>all

MrDude_1

iTrader: (4)

going off on that note....

the genIII is the easiest motor ive ever worked on.
95% of the gaskets are reusable. you can pull this ****** apart, slap a diffrent cam in, and toss it back together in under 2 hours. everything is easy to do on this, with the exception of the lifters... (head removal for that is harder then SBC...)

my LS1 is in a 3rdgen, and theres room everywhere... so you can really see how easy it is to work on.

and the EFI is pretty easy to mess with too... once you get the hang of it of course... but you need to get the hang of tuning carbs too... or the GMECM EFI.... so thats no diff...


overall, the newer motor is just a better design.. thats all it comes down to.