i have a V6 firebird 1991 i want to put a V8 engine on it .. i have many engines to choose between ... " L98 or LT1 or LS1 or .. big block old school engine or other ? "


The reason :
1-Drag Race
2-to drive a powerful car every day

i want to know the fastest , best & easiest to tune ...

Thnxxxxxx

 

This is easy, if you want the best = LS all the way.
Don't play with the old junk.

 

You've got to be realistic w/ your self, are you gonna finish it or bail the 1st time theres trouble? Swapping takes skill & planning & budgeting. Might be along time till you drive it again.
If this is a first time changing any engine, I'd recomened getting a 3.4 out a 4th gen camaro.

 

lsx is not cheap, but you get good mileage and good power. my#1 choice for a daily driver (and will be come spring.....) tuning is never really an easy thing, but if you find a good shop, once is all you need until you make big changes.

 

BBC of course... No substitute for cubic inches.... lol

 

i find LT1 engine for sale in good price i think if i make some tune on it " not too much " i want a car about 350 HP not more just for fun and race some small cars and the same time to drive every day ...

i have 700R4 trans does it work on the LT1 ? ..

 

Of course there is. Many, in fact.

Power is about getting as much fuel & air through the engine as possible and converting its chemical energy to kinetic energy. Efficiency is getting as much of the chemical energy converted to kinetic energy as possible.

While cubic inches may accomplish the former, it's rarely good at the latter.

My LS1 swap has higher stall (3500 vs. 2500), more gear (3.73 vs. 3.23) than the ZZ-clone carb'd 350 it replaced. It's over a second quicker in the quarter mile (10 MPH faster), but gets as good as or better fuel economy as the 350 did. Yes, it cost a good bit to install, but getting the 350 to go as fast as the LS1 goes wouldn't have been free, and fuel economy would doubtlessly suffered.

Oh, I had long dreamed of putting the 396 that was in the '57 into the Camaro. When I finally got familiar with the LS engines, there was no reason to continue considering it.

 

I hear you can actually find big block chevys in the junkyards now.

 

thanks man .. i see many people said LS engines is the better here .. does LS1 have big deferent from LT1 from the speed side cuz i see a big defferent for the bodget $$ LT1 cheaper than the LS1 for about hundred of $

 

A stock LS1 f-body is about 1 second quicker in the 1/4 mile than a stock LT1 f-body, all other things being equal.

You can do a lot to either one to make them faster. I would say the aftermarket support for the LS engines has far outpaced the aftermarket support for LT engines.

 

If you only want 350hp(crankshaft hp, or wheel hp?), and some mileage, then you don't need big block chevy. If you wanted max power then BBC is the king. Any of the remaining combinations can get 18/25ish mpg with 350hp range. It's going to come down to money, it always does. Personally I am not a huge fan of LSX if you are going for all out power. They are great for the average street racer because they allready come from the factory with all the good stuff; windage tray, 240-300 cfm heads, 210ish duration cams with good lift, roller rockers, roller timing chains, factory exhaust manifolds are almost as good as headers(doing headers on a stock LS1=approx 10 rwhp), dual cats, coil over ignition which allows the computer to advance the timing for each individual cylinders needs. You can do all that stuff to a SBC or LT1, and make basically the same hp. But if you don't want to mess with all that stuff, then a LSX makes a great drop in and make 350-400ish hp. A SBC or LT1 would need a few mods to get to that power level(mild camshaft, mild head work, headers, intake,roller rockers and timing chain, throttle body.) If you go LSX you also need to get LSX engine accessories. The ones on your car now will not work with LSX OR LT1, but some of them will work on a small block chevy. I may be mistaken,, but I also think your trans will not bolt up to an LSX. I know the T56's have a different bell housing from the LT1/sbc and are not interchangeable with lsx's. You will need to figure out what your budget is, and then add 15% for unforseen stuff. Then start pricing all this stuff.

 

maybe a tall block...lol

 

The only fly in the ointment is tuning. But, if you're not a dumb/old/lazy technodunce like me, LS is the only logical way to go. Best pushrod V-8. Ever. Bar none.