On the 4.5...

[SSXtreme350]

On the 4.5L engine that was suppose to be made. If I took a 4.3L engine to try to make it.

Would the block have to be bigger or would the 4.3L block have enough to do work to it?
Would I need to just put bigger pistons after I'd bore it to make 4.5L or I need to put a different crankshaft to stroke it to make 4.5L?

I imagine there is more than these 2 things. Unless the heads on the 4.3L would work on the 4.5L. Also probably bigger injectors and fuel pump; along with computer.


I know just putting V8 would make more sense, but I would just like to know some info if any has any about 4.5L engine.

Thanks

[Mikz86TA]

Bore x stroke. Figure it out. A 4.3 is the same as a 350 with the exception of 2 less cylinders. You take a 400 crank in a 350 bored .030 and you get a 383. A 350 bored .030 is a 355. A 400 (larger bore than a 350) and a 350 crank is a 377.
Usually a .030 overbore is std on a rebuild of a milage motor, a .060 is safe and a .090 is pushing it =)
Im too tired right now to do any math.

[blue388]

http://kb-silvolite.com/calc.php?action=disp engine displacement calculator have fun!

[Cameo_S10]

http://kb-silvolite.com/calc.php?action=disp engine displacement calculator have fun!
Man I like that:cool:

[blue388]

Yea there site is great I was playing on there yesterday figuring CI on my next project, 4.125 bore dart block with 350mains and a 4.00inch crank 427ci small block!!!

[Cameo_S10]

Yea there site is great I was playing on there yesterday figuring CI on my next project, 4.125 bore dart block with 350mains and a 4.00inch crank 427ci small block!!!


Sweeeeet! Is it me or does just the mention of 4 2 7 get your blood pumpin?:cool:

[blue388]

Oh yea!
BTW a .060over 4.3 is a 4.4 thats about all I know in regard to a 4.5l

[Cameo_S10]

Never heard of a 4.5l Chevy.

[blue388]

Mercedes made a 4.5 v8 in the 60-70s that was a screaming motor a friend of mine has one in a 72 280se only 4.5 I can think of

[SSXtreme350]

The 4.5L is under history of the xtreme

[Mikz86TA]

Probably a typo

[boxcarracer963]

So if you bored your 4.3 .60 over and stroked it you could make a 4.5 couldnt you?

[firefighter]

To make a 4.5L you gotta get to around 275ci you'd have to go .040 over and get the crap crank from speed-o-motive which is a 3.55". If you really want to do it right you'd have to get a billet crank and then get up to 3.75 or if you wanna mess with exspensive pistons maybe up 3.8" or 3.9". You could actually get up to about a 5.0L. 3.9" stroke and 4.060 bore gives you 302ci or 5.0L. I have aspirations of going .030 over and putting in maybe a 3.6"-3.7" crank. This will be one of the later stages on the blower build.

[boxcarracer963]

Dang... Imagine a 5.0 Liter v6, it just sounds cool for some reason :)

[firefighter]

doesn't it?

[SSXtreme350]

What is the bore and stroke of the stock 4.3L?

Somewhere around 4.0(bore) and 3.5(stroke)?

[Mikz86TA]

You can buy a WorldProducts 454 SBC or a 427 or a 415. Part of their Motown casitng line. Also have shortblocks or partial built engines. Alum or Iron. http://www.worldcastings.com/:D Sweeeeet! Is it me or does just the mention of 4 2 7 get your blood pumpin?:cool:

[boxcarracer963]

What is the bore and stroke of the stock 4.3L?

Somewhere around 4.0(bore) and 3.5(stroke)?
that adds up to 263ci so thats close

[89BLAZE]

gm used to make the parts to bore and stroke the 4.3 block to make a 5.0 or better v6 and at one time you could even get the splayed valve heads like the ones on the 454 and other big blocks. not sure if those parts are still available though.

[firefighter]

What is the bore and stroke of the stock 4.3L?

Somewhere around 4.0(bore) and 3.5(stroke)?


Same as a 350ci 4.0" bore and a 3.48" stroke.

[firefighter]

gm used to make the parts to bore and stroke the 4.3 block to make a 5.0 or better v6 and at one time you could even get the splayed valve heads like the ones on the 454 and other big blocks. not sure if those parts are still available though.



That was/is all Bow Tie racing stuff. IDK how much of it is still available but I think you can get the blocks from Summit. Mucho caro.

http://store.summitracing.com/partdetail.asp?part=NAL%2D10134371&autoview=sku



Aluminum too. :hypnotize

[Slacker1357]

the mustangs had a 5.0L didnt they? it was the older models right?

[firefighter]

Yeah but it was a 302 V8.

[Slacker1357]

:doh: oh yeah...:2*****slap: duh

[boxcarracer963]

Actually the mustang is a 4.9 if you look at it but i guess they felt 5.0 sounded cooler.

[Mikz86TA]

Yup. a 302 is indeed a 4.9 but close enough they lied to us =)
Isnt the LS1 actually a 5.6 and not a 5.7?

[boxcarracer963]

isnt a ls1 350 cubic inches?
all you have to do is go on google and search any amount of cubich inches and it will tell you how many liters that is.

[White-V-6-S-Ten]

I used to have a 4.5 in both of my 1969 dodge darts!
They both came with it factory.
I agree a 5.0L v6 in our trucks would be awesome! Just to think of the torque and power.... Building one up just to see what is would do would be awesome!

[White-V-6-S-Ten]

I actually think the ls1 it like 346 cid. I could be wrong...
The 5.slow mousetangs were actually 4900 cc not exactally 4900cc a lil more but i dont know the exact number but to be cool they just bumped it up a lil.
The chevy 307 and 305 were more of a 5.0 than the mousetang motor was.

[firefighter]

An LS1 is actually 346ci like Josh said. And 305 is just over 5000cc. And like I said a 5.0 V6 in the Dimes would be hot. I would really dig one of the all Aluminum Bowtie blocks with some Brodix heads and my S/C....... :wackit:

[White-V-6-S-Ten]

Hell yea that would be great!
Any idea on what that would cost to turn the 4.3 into a 5.0?

[bespurcell]

If you have to ask.....

[firefighter]

You'd definatley be looking at a billet crank about $2K for the rotating assembly, and you'd have to get a Bow Tie block $2k in iron and $4K in aluminum. If you are gonna do something like that you'd have to get the Brodix heads about another $2K. So doing quick math $6K-$8K before you even start talking about valvetrain, cam, gaskets, etc. you gotta figure about $8K-$10K before you worry about induction.

[tinman]

A person used o be able to get a bowtie block and all the parts from gm to build a 311ci v6. Bore of 4.125 and stroke of 3.875 but I dont know if you can get the parts anymore.

[firefighter]

You can get the blocks the crank will be custom the heads it's either stock or Brodix.

[tinman]

This is what I was looking for. This will tell more of what is done. Not cheap I am sure.

http://www.highperformancetrucks.com/trucks/truck_view.php?id=129