online swap meet parts fs or trade

[dohcfiend]

i am open to negotiations on these parts b/c i need money for a new motor. 3.4 dohc guys, u will be kicking yourself if u let this one slip by. also included with the cam banks will be the drive gear since there are a different amount of teeth on them. help me out. thanx.

[dohcfiend]

i figure it is time for a little motivation being how i am desperate. lets forget about the fact that bolting on these heads i have will add about 0.25 bump in compression or that the clover style chamber is supposedly better. IMO for performance reasons these heads are a more solid foundation for 1 good reason. the size in ex ports. with port work or cams or headers these heads would outflow the previous versions no sweat. u don't have to take my word for it.

see for yourself:

[dohcfiend]

NEW PARTS: 1 set of 96-97 valve covers. turn your 9 feet of pcv hose into about 6 inches plus they are necessary for the 96-97 intake swaps.$35 shipped.

last thing. i am a pretty resourceful person and just b/c u don't see what u are looking for doesn't mean i can't get it. pm me and i can probably work with you.
just an example i sell 96-99 northstar tb's cheap for l67's or whatever u need. also i carry a few northstar fuel rails. if u haven't seen them they are made from plastic shrink tubing and can be cut to fit any application u wish. how about 15 bux? that is hardly an investment. if u can't make it work, the loss would only be a drop in the bucket. nothing ventured nothing gained. a worthwhile mod for 2.8's b/c of that pita fuel delivery system.

i kinda don't want to sell these but i don't want a bad mark on my credit report either. 1 set of 6 ford 30lb injectors in immaculate shape. tested and work great. right now they are in a sealed bag, they will interchange with gm no sweat. but in gm cars it is more like 33-35 lbs b/c fords operate at around 5 psi lower than gm. great for any forced induction project or heavily modded motor. but i will not take a loss on them $150 firm.

[SappySE107]

Show me proof that the 96 heads are better. I havent seen any and would prefer not to assume something is better without a good reason. The exhaust ports are wider but not taller. Also, are you sure the pistons alone are going to bump up compression. It has more valve relief along with the dome and the head CC difference alone should be enough for the compression difference at a guess. Again, i haven't seen any proof that its the pistons that do anything for compression.

[dohcfiend]

94 ex vertical measurement is 1 27/32 and horizontal is 1 21/32
96 ex vertical measurement is 1 9/32 and horizontal is 2 25/32

if u add them both together 94 is 3 1/2 inches and 96 is 4 1/16 inches. it was my understanding that more area could handle more or flow more air. i didn't mean it was better off the bat for a stock engine. i think i said somewhere that i thought is was a solid foundation to build off of. i personally think they would be better on a modded motor. isn't more compression better? aren't larger ports better? that was my thinking anyway.

on the pistons i was using some1 elses math on that from another forum. i think he said the heads alone wouldn't make 9.7:1 on a non-96 motor so i figured the extra compression had to come from somewhere. why not the pistons?

i am not an engineer and i don't have the money for research right now so if u like i can sell you the 96 pistons and u can tool with them and mearure them. if u find they don't add any compression i will refund your money and u can send them back and i will pay for the return shipping.(well, within reason anyway. i won't give u a refund if u send them back 6 months later in different condition from which they were sent)

[Fierobsessed]

It isn't like switching over to the 96-97 heads is going to give you 20 horses. If you have seen the heads side by side, you will notice that the 96-97 heads combustion chamber APPEARS smaller then the 91-95, due to its cloverleaf style chamber. Slight changes in the pistons and combustion chambers have a very strong effect on the compression ratio. For the 3.4 DOHC, 1 CC is about 0.1 difference in compression ratio, almost exactly (but outside of the 9.5:1 range that number does vary). So whats the difference from 9.5:1 and 9.7:1, just 2 CC's witch is pretty small considering the small dome on top of the 96-97 piston is 2.5. So, If compression height is the same from 91-97 pistons, then you have a 2.5 CC Dome being the only difference (maybe the valve reliefs are deeper? I dont know, again I don't happen to have a couple of 91-95 pistons laying around) and the rest of the difference would have to be in the head. So whats the head give you, practically no compression bump? So that leaves me with a mystery. I still need to know what the compression heights are on the 91-93 pistons, for both auto and manual, and the 94-95 pistons. Even tiny differences in compression height has a HUGE effect on chamber volume and compression ratio. I won't take the catalogs stated numbers as an accurate measurement, they have not proved themselves as a reliable source for that info.
As for the Exhaust ports, Those numbers you measured, you dont add them you multiply to find area, a 1X10 rectangle would be 11, if added, and be 10 if multiplied. a 5X6 rectangle if added would also be 11, but be 30 if multiplied. Area of a rectangle is always multiplied. Port size isn't everything, but it can certainly help if set up right. Quad 4 ports are FAR smaller then those of a 3.4 DOHC, yet it still manages to work up 180 horses somehow. Notice though, the shape of the 96-97 ports are more quad four like. Some say it was to improve exhaust velocity for emmissions purposes. I don't see how that could be, considering that the ports ARE BIGGER. Maybe it had something to do with a more straight transition from each valve to the port as opposed to a slightly more aggressive change to a D port. Who knows, but one thing that most people agree on, is that it was an improvment for more potential. The port size on the 91-95 is still PLENTY big. The cloverleaf style chambers are a nice improvment over the pent roof chambers, they add the potential for useable quench area. I believe they took full advantage of that with the 96 pistons compression height. As I measured it, the 96-97 motors pistons come past deck about .013" and with a .060" headgasket that puts quench at .047" witch is almost perfect. Again, I still don't know what the CH's were on the older motors.

If my theories are right about 96-97 motors then It might make sense that they re designed the motor for useable quench so they could bump the compression ratio to make the engine more efficient and reduce emmissions, but not necessarily add horsepower. The way they went about "improving efficiency" into the 96's basically seemed like a recipe for making horsepower but without actually adding any (well...5 ok)

[dohcfiend]

heads are sold.

[dohcfiend]

last of the free parts as far as i know of. 1 91-95 egr valve, 1 fiero nochie engine bay cover and 1 set of exhaust manifold gaskets.

cam banks and shortblock are gone.