So i have been doing research for a different project today and cant find my answers any where if I wanted to take the heads and intake off a 2000+ 3.4L aluminum and put them on a 2.8L, I know the compression would be like 11.5 to 1 but ill use a thick gasket to bring it down a little but would the valves hit the flat top piston and with say 11:1 compression could I run pump gas and a booster? And how would you convert to dis instead of a distributor?

 

correct me if im wrong but I thought anything over 95 (I think) was a 3.8 and FWD. I could just be totally wrong here but I could've sworn I read something like that around. either way good luck

 

Nope the 3.4 was in the grand am gt and a bunch of other fwd tm

 

There are hybrid experts on the board but I think the 3400 heads you're talking about don't fit the 2.8 as the bore is too small. Maybe other stuff too. I think you need the 3.1 or 3.4 block.

 

3400 heads fit a 2.8 block. 2.8l and 3.1l use the same bore. It's the 3500 heads that can not be used on the 2.8/3.1l block.

The most difficult part of building a hybrid using a 2.8l or 3.1l block is the need to convert to DIS, which requires an external trigger wheel added.

 

Another thing that is notable are having custom length pushrods.

 

Will the valves clear? And how would you do the dis?

 

About what compression exactly would I be looking at? And push rods could they just transfer from the 3.4

 

If you used the iron head gen one pistons with the aluminum heads your compression would be high. 12:1 or higher. Im using 3100 pistons so that I can have managble compression for my set up.

The pushrods out of a 3100 or 3400 will not fit right. You have to measure for new ones and add in the correct preload that the cam manufacturer reccomends. They are somewhere arround 5.925 and 6.295 ish. Exhaust pushrod is always longer on this set up. I measured mine a few weeks back. Those numbers I wrote are not right as I cant think of the correct numbers but they are close.

 

Ok cool how did you do the dis system and if I were to find a way with the flat top pistons even if that means race fuel would the valves clear?

 

The valves would clear i believe but your compression would be way high. Not saying that it wont work but its so much easier tuning wise to just toss in gen 3 pistons. The difference in the combustion chambers on the gen 1 vs gen 3 heads is ALOT

For the DIS I got a 7x crank sensor from a 1993-1995 3.4L Fbody. I then did some rewiring from the ecm to eliminate the ICM and the dizzy and to add in the crank sensor and the coil packs i had from my 2002 impala. Depending on what year your dealing with and if you can tune it you may need to do more work then i did. Im running a $59 mask on a 7730 ecm which works with DIS. I still need to notch the damper or pulley for the crank sensor but that part doesnt look to hard else then getting the sensor mounted a playing card away from the balancer/pulley...

 

Dang! What hp are you expecting? And im really interested! What wiring did you have to do and did you do a full thread on it?!

 

Well I ran high 12s in the 1/4 mile last year on 13psi of boost. This year im aiming for a 12 flat by seasons end with around the same boost or just a tad more. Im really banking on the free flowing heads compared to the Iron ones, and im looking to shed another 100lbs off the car. 40lbs is the head swap alone. The car weighed 3050 last year, id like to see it at under 3k lbs.

There is a more detailed thread on 60degreev6. I hope sixshooter doesn't mind the post of another site. Here it is. http://60degreev6.com/forum/showthre...00-hybrid-swap

 

No problem with posting links to another site, share info away...

I will suggest though to get a trigger wheel made and not to notch the harmonic balancer.

The reason being that the outer ring is rubber mounted and does not stay in true time with the crank itself, due to the elasticity of the rubber between the outer ring of the harmonic balancer and the inner. This can cause some minor timing issues, which IMO is not worth the headache to deal with. Also if the outer ring slips, which has been known to happen fairly frequently, then the ignition timing will be way off. With the use of a proper trigger wheel, you will at least be able to drive the car home.

 

Ok so a week ago I found out how to have a 11:1 compression using the stock pistons. I was wondering if I use 1.6-1.7 roller rockers with the 3400 intake, higher flowing heads, dis, cold air intake "outside of the car true cold air," headers and full exhaust what could I expect for overall hp? And this engine I have read will be able to hit 7k without blowing up so I do plan on pushing it cause this should flow to about that rpm pretty easily.

 

3100/3400 have 1.6 rockers....Im not sure if they are like that for all the years but i can tell you on a 2002 3400 it has 1.6

 

Thats pretty cool! No matter if they dont it will get some atleast and will be better then the 1.5 on theb2.8l

 

The reason I ask is to see if it is worth while to do it

 

You need to make your sig picture smaller

 

Even with the aluminum heads you won't be making power to 7k rpm without an aftermarket cam or regrind.