I have2003 monte and i want to put a 4.3L in it, love the car but love the motor i had in my blazer. I was wandering if its even possible. If someone knows if it is or has seen let me know.

 

I honestly have never heard of anyone doing this. But I am puzzled why you would want to since it would be a 10 horsepower loss. As if i remember correctly the 4.3 that were in S10s had 190hp and I am pretty sure it would be a mpg loss as well.

 

Well it would be a mpg loss FOR SURE and if he has an LS, with the 3400 it would be a hp gain, but you're right, if it is an SS it would be a loss...There are way more things you need to think about though. For starters, the 4.3L was always a rear drive motor...I'm not sure if you could find a kit to convert it to fwd....second, if you can't convert it, ummm....rear axle, driveshaft...the car isn't designed for any of that...Anythning can be done, but I don't think a 4.3 would be economical AT ALL...any way you look at it.

 

I agree, if you want HP, do an L67 top swap, and call it a day.

 

For the same money, if your Monte is high millage(like mine), just rebuild your engine and throw in a ZZP stroker kit, VS cam + ZZP stage2 heads, ported lowerintake & stage 1 TB, HV3, and a 2.5" catted Downpipe. But most importantly a PCM1.0 that is adjusted for ALL thesemods.You will still look EXACTLY stock, be emissions legal, not loose as much MPG, and dyno around 235whp, as opposed to the stock L36 165whp. And that kicks both a 2nd(215whp) or third(231whp) generation blown L67. IMO.

 

Anything is possible- but you don't want to do it. It is an engine setup for RWD and there is no direct engine harness to let it drop into your car.

If you want an engine upgrade (assuming you have a 3400) an NA 3800 (L36) or supercharged 3800 (L67) both have similar or more power than the 4.3 with much more aftermarket. And both of them physically bolt right in and plug right in for the most part. Very little custom work is necessary. To put a 4.3 in, you're looking at doing a bunch of custom modification- for no reason.


Rebuilding a 3800 is a waste, and there are many documented cases of shops not doing it correctly. Its not a 6 cyl version of a SBC like some shops build them like.

There are tons of low-medium mileage L36 and L67 engines for decent prices- far cheaper thana rebuild- and then you have factory reliability.

IMO, thats an expensive bad idea. The thing costs a ton, and significantly weakens the bottom end. Not to mention, stroking the engine does not give anywhere near the power increase boost does. You could almost pull off a complete L67 swap (if you have a 3400) for that price. For sure you could pull off an L67 top swap on an L36- and make much more power.

There is a reason they haven't sold hardly any of their kits.

Are you suggesting him to get a boost cam for NA?

IMO since you're suggesting NA mods- a GT1/2/3 would be a better choice, but I would suggest boost instead.

That doesn't makeany sense though- you're talking like a $5k setup for something that will barely be able to hold its own against a basic bolt on L67- and is completely maxed out. Drop even a basic cam in an L67, and it'll blow that setup away with far less money. Thats probably why people abandoned going fast with NA 3800s- its too expensive to even try to compare to boost, and your potential is much more limited.

I don't know what you're considering 2nd and 3rd gen L67s. All I know of were the original L67s in the early 90s that were like 200 crank hp, then the late 90s/early 00s L67 that made 240 crank hp. I've never heard of any other L67. There is the L32 which makes 260 crank hp- maybe thats what you're talking about?

I don't know where you got your numbers from either- a stock series 2 L67 generally only does about 200 whp unless you're adding in basic bolt ons or something.

 

what engine is in yours right now? the 4.3 wont touch a 3.8 or a supercharged 3.8, plus the engine sits the oposite way (the 4.3 sits in front to back, where the 3.8 goes in sideways) so there would be a lot of customizing.

if your wanting more power, drop the 5.3 in it from an impala or a monte, it will fit, and will probably cost less, or try to find a supercharged 3.8

just my opinion though