Sorry guys I dont have time to search. I have to make a decision by tomorrow before it gets sold.

I need to know which one is the better engine.

The LT1 From a 95 Caprice w/ castiron heads long block * cost 600.oo bucks, plug and play IT is a 5.7L Here she is in all her glory:


Or Lt1 From a 93 Camaro z28 w/ alum. heads. my stocker * cost mine w/rebuild + cost of new block if i can find one (i dont want to know how much).


Please let me know your opinions too. (Reasons for your answer)

Thanks,
matthew

 

from what I recall, the difference in the motors was all in the heads. The caprice had iron heads that actually flowed a little better (again this is all recollection...), and the Z had aluminum that flowed a little less. When it comes down to it though, the weight savings (not to mention less heat soak) from the aluminum made up the difference and some... also it all depends on what your application is. Iron heads may be suited for some heavy duty applications... but more times than not the aluminum will always be better

 

From a programming standpoint, the 95 is easier. You have to take out and reburn the chip in the 93. It can be done but the 95 PCM is so much easier to deal with.

 

Main application = cost.

If i got the caprice lt1 i would be changing the head gaskets, for precaution reasons. and i could put my alum. heads back on, but i would rather sell them if i can.

I also will be sending off one set to have a valve job and new springs and RR's for my new cam.

 

True,
But The Caprice Engine Is a Long block Only NO PCM, i will reuse my 93 z28 harness and ECU and what ever else is needed.

I have the stock Camaro LT1 but the block is messed up and i will have to find another, if u guys say rebuild.

 

buy the caprice and swap over all your stuff on it its the same motor outside of cam and heads oh yeah and opti is a vented style as the 93 f body isnt so its a differant timing cover and cam dowel location and the caprice has 2 knock sensors as the fbody has 1

 

i clicked the wrong one. go with the aluminum heads camaro engine they were rated at a higher hp.

 

I dont think all of the caprice were 350ci i know there was a 265 LT1 in buick's and i think some caprices. So go with what you know is a 350 Lt1 with 60LBS lighter heads that cool better and stick with z28 engine my opinion

 

Good point, i forgot about the 4.3L if so ill pass, ive emailed him, waiting on a reply

Anyone know how i can tell if its a 4.3L

 

the 5.7 will have 327 casted on the side of the block, 4.3 wont. if the caprice has a 5.7 engine itd prolly be the better choice, the caprice has a smaller cam but it also has a vented opti. Do a cam swap while its out and you can end up with more power than your original motor.

 

actually the cast iron heads flowed better than the alu did due to later devolopmentbutt the heat soak and weight turns them off of a lot of people i ran them on my for awhile and the camaro engine as was stated is the same motor just a smaller cam was put in for more civillian use ya could say. it takes a lot of low end to pull a 5000 pound boat and they were only like 10 hrs lower but the trq was a lot higher save your money if the lt1 out of the b-body is the 5.7 and not the 4.3 buy it and switch cause everybody with the f-body lt1 wants a ton of money for em and there the same thing hopefully 96capricemangr chimes in here soon and he can fill in the blanks he has a b-body block that will hand most f-bodys there assin a 5000 pound grocery getter

 

If you get the 93 you wont have to swap as much over to the new engine plus u will have a extra set of alumin heads for porting or just selling to help pay for the new motor. The cast iron heads do flow better but are alot heavier plus have pressed in rocker studs so machining is required to upgrade youre cam. The HP ratings are all in the cam specs. The b-body cam has 330ftlbs and 260 hp The caprice engines kick butt If you need a cheap shortblock they are the way to go i swaped everything on my car motor mounts are different opti is vented in the Bs ect its doable but its also invlolved.

 

The 4.3 block casting is 10168588, and it has "4.3" cast into the block.

 

IT is a 327 code 5.7L Woo hoo... Thanks guys im getting it tomorrow. Pics added at top.
I think ill keep the Cast heads do a valve job, RR's, and my cam.
and sell off my other stuff to pay for it.



Im gettin it for 500 bucks.

What should i do with the other 500 in my budget. I dont want to go crazy just whats worth it while the engine is out.
And Yeah Im a NOOB to LT1's , Ive Turned out some pretty bad *** 406's though. High 5's in the 1/8th all motor.
I already have a nice NIB Comp Cam.
I need a valve job, 1.6RR's, and dual valve springs. Used parts pref.