This is an interesting question. Why didn't they use the 4.3 4bbl in the 3rd gen v6 camaros instead of the crappy 2.8's?

 

welcome to the boards but please don't come in this board and make a post like that with your information showing that you own a V8, that's what is called trolling. anyways, i don't know exactly why they used the 60degree v6 instead of the 4.3s. but, i do know from experience that they 4.3s are much more expensive to mod.

 

Increase bore and stroke your engine:


Bore. Bore. Bore. Bore. Bore.
96.52 96.774 97.028 97.282 97.536

Str. 86.36 3792 3812 3831 3851 3873
Str. 87.63 3848 3868 3887 3909 3928
Str. 88.9 3904 3923 3945 3964 3986
Str. 90.17 3959 3979 4001 4022 4043
Str. 91.44 4015 4036 4058 4079 4101
Str. 92.71 4071 4092 4114 4135 4156
Str. 93.98 4127 4148 4169 4192 4214
Str. 95.25 4183 4204 4227 4248 4271
Str. 96.52 4238 4260 4283 4305 4328
Str. 97.79 4294 4317 4338 4361 4384
Str. 99.06 4350 4373 4396 4419 4442
Str. 100.33 4405 4428 4451 4474 4499
Str. 101.6 4461 4484 4509 4532 4555

This table for 3,8 V6 engine! All values in millimeter and cubic centimetre.

 

...oups, sorry, help me corrected preceding post (for admin)
...and sorry for bad english (for all)

 

Originally posted by AM91Camaro_RS
"please don't come in this board and make a post like that with your information showing that you own a V8, that's what is called trolling."

Whoh. So you are saying don't post on v6 boards if you don't have a v6? Sorry but I don't agree with you. If you have a question, or can answer someone elses question you can post. How do you know he didn't have a v6 before he got the v8?

 

....grrrr..... Anyhow, the reason for using it was becasue the early 4.3 was a boat anchor. The 2.8L is too, but it's a much lighter, higer revving boat anchor The 60* V6 is a compact powerhouse, the 4.3 was just a 350 minus 2 cylinders (with crappier heads). The old 4.3's were nothing like teh Vortec 4.3's of today, they made as much power as the 2.8, but were heavy. I've asked the same question though. You'd think GM would prefer not ahving to build two different bellhousings for the 700r4 in our cars...

 

Even when the 2.8 has less HP than the 305 TPI or 350, the 2.8 MPI has 135 HP, the 305 carb has 155 HP.....what is the big different between them?

 

About 80 ft/lbs of torque..... BUT, they both suck without a LOT of modifications (Apparently GM can get 300 hp out of a 2.8L with head work and a different cam......scary)

 

I'm wondering why they didn't use the 3.8s like the GPs had

 

There were 2 different 3.8s, as well - 229ci and 231ci.

The 2.8 was GM's black horse racing motor - I kid you not, go see what they used in the midget racing, and some outdoor motors.

The 60º V6 is naturally balanced - allowing quite the rev potential, if a properly lightened and strong enough valvetrain/rotating assembly are used.

Also, our intake SUCKS. Guys, I think the turbo dyno graphs proved that one

But rest assured, I'm already at work on that little problem - and as soon as it's done, it'll be ready to go immediately in production (as it'll be much cheaper to build/sell than the turbo kits!)

 

Amen to that. What are you guestimating the price to be? -(opens wallet and counts money)-

 

The 2.8 does suck. I traded mine for a 3.4L and lots of goodies.

 

The 4.3 is a great Idea for an fbody. Check out this link.

http://hotrod.com/techarticles/engine/113_0210_blown/

and

http://hotrod.com/techarticles/engine/113_0208_v6

 

Yea...look at valves!

 

LOL, that V6 makes more power than 98% of the cars on this site. That's a rather extensive build though too. I'll keep my 60* motor, those 4.3's idle a bit too rough for my taste (as if my engine idles smooth ).

 

Aiming for around $350, with a 62mm TB - all aluminum, of course (I'd like to reduce weight, if I can, with this!)

 

Probably doable. Are we talking entire intake or just the plenum?

 

or put THIS 4.3 i your third gen

 

For that price, I woulda bought it....Then a nice t350 to back it and i'm set.

 

I'm in the process of building up a 4.3L v6, although it's going into a 4th gen. Have a low mileage roller from an 88 S10, not the best but its in great shape, and I'm looking to throw a set of stock Dodge Stealth turbo's on it (should be getting them in a few months if everything pans out), using a small mechanical secondary 450cfm Holley carb, mild porting to the stock heads and a stock cam. Hoping for about 320hp or so, give or take 10.

When I have more money, I intend to have the crank welded and offset ground to 3.18 stroke, use a thinned 6" sbc rod and dished sbc pistons, ported vortec heads, mild cam and a homemade intake I've been working on. Should be good for 450hp and 7000rpm if I get a rev kit, or use solid lifters.

Now, the only hitch is......I can't find ANY dists. for these things, and I don't wanna use the stock truck ecm to control a shatty dist.

 

[KED85] You need to buy the GMPP catalog from dealership for approx $7[/KED85]