WILL VR HEADS FIT an ECOTEC????

[t-rav]

hey all begining a lil project car and just woundering if i would be able to retro fit some VR heads to the VS block ???
any help would be great cheers boys

[hakhawk]

simple answer, no.

advanced answer, yes with a custom inlet manifold and camshaft, but why bother, ecotec heads are much better than vr.

[Not_An_Abba_Fan]

Why? The ecotec heads flow a lot better. They will bolt on but you will have to change a shit load of things.

[_R_J_K_]

simple answer, no.

advanced answer, yes with a custom inlet manifold and camshaft, but why bother, ecotec heads are much better than vr.

I thought the 3800 and Ecotec head also had different water jackets?

[hakhawk]

I thought the 3800 and Ecotec head also had different water jackets?

slightly different size holes from memory, just have to use the right gasket.

[dynoryder]

i also thought the exuast ports were differnt as well differnt in positioning

[greenfoam]

Yes the exahust and intake are different because the valves are in a different order but the heads bolt on read above ^

[immortality]

so who is going to be the first guy to bolt some ecotec heads on a buick with a custom manifold

a buick with decent heads,results would be interesting to say the least

[Not_An_Abba_Fan]

so who is going to be the first guy to bolt some ecotec heads on a buick with a custom manifold

a buick with decent heads,results would be interesting to say the least

Wouldn't that then be an ecotec?.....just about....

[immortality]

Wouldn't that then be an ecotec?.....just about....

not really, the ecotec is a evolution of the buick 3800, hence they call em series 2 3800 in the US

[Not_An_Abba_Fan]

But the blocks are essentially the same, just the heads and intake were dramatically changed.

[hakhawk]

But the blocks are essentially the same, just the heads and intake were dramatically changed.

blocks are rather different. one inch deck height difference for a start, which makes the distance between heads narrower. the ecotec block has extra bolt holes for brackets and such.

i have pics of an ecotec head bolted to a vr block, was planning on making a ITB manifold, might still oneday, but ive been distracted with many other projects.

if i can find them, i'll post them up

[immortality]

blocks are rather different. one inch deck height difference for a start, which makes the distance between heads narrower. the ecotec block has extra bolt holes for brackets and such.

i have pics of an ecotec head bolted to a vr block, was planning on making a ITB manifold, might still oneday, but ive been distracted with many other projects.

if i can find them, i'll post them up

wish the earlier 3800's had the cross-bolted mains like the ecotec

[Not_An_Abba_Fan]

My point is that the heads and manifold make it an ecotec, not the block. So by bolting the ecotec gear on the early block, in essence, it becomes an ecotec.

[immortality]

My point is that the heads and manifold make it an ecotec, not the block. So by bolting the ecotec gear on the early block, in essence, it becomes an ecotec.

not really, the ecotec is the sum of all the parts that are changed. if you bolted the ecotec heads onto a earlier buick 3800 engine and then sat the ecotec intake manifold between the heads there would be a gap between the heads and the manifold. this is because of the 1" shorter deck height. therefor the pistons and rods are different also. not sure about the crank but i'd imagine thats different as well because the pistons have a much shorter pin height and therefor less mass so their must be less mass in the crank for ballancing reasons.

if i remember correctly, ECOTEC is a acronym but i just can't remember what it stands for. the ecotec is infact a buick engine. the basic 90* V6 architecture didn't change. the heads flow much better and of course the new engine management and full sequencial injection

[Not_An_Abba_Fan]

Emissions Control Optimisation TEChnology

By using the ecotec intake and heads, whichever block you use, would in effect make the engine an ecotec. Also using the ECU I suppose too.

[immortality]

Emissions Control Optimisation TEChnology

By using the ecotec intake and heads, whichever block you use, would in effect make the engine an ecotec. Also using the ECU I suppose too.

you can ONLY use the heads. the intake manifold doesn't fit unless you cut it in half down the middle of the valley. and i'd run it with a 808/165 ecu and use MAP. much better then MAF

[delcowizzid]

and ide say the rod to stroke ratio is a bit different unless its only the pistons changed to suit the lower deck height

[t-rav]

reason being,. have turbo manifolds for Buik engine and need to fit to dummy motor befor installing into engine bay have spare blown VS motor and wanted to use that .
thanks heaps for the input

also if any of you have some blown or shit VR heads you want to part ways with im interested in takeing them off of your hands

[delcowizzid]

if you build it all round a vs block with vr heads it wont fit the vr block and heads when you are finished

[t-rav]

ok no worries i'll just buy the buik now then thanks mate.
once i get the project going i'll post up a thread and pics of the process .

[dynoryder]

just wondering dose any one know about aftermarket heads for buick and ecotec i have heard of abbot heads but can not find them help would be appreciated

[_R_J_K_]

just wondering dose any one know about aftermarket heads for buick and ecotec i have heard of abbot heads but can not find them help would be appreciated

Yella Terra probably do a set for each.

[DannyboyDS]

hmmm. so get a buick engine, add ecotec heads, drop custom inlet manifold ontop, and you can still run the ECU from the ecotec if you transfer the sensors i'm guessing.

Sure it would work? wont it have issues using the ecotec ECU in regards to the CAS and other such things?

[hakhawk]

hmmm. so get a buick engine, add ecotec heads, drop custom inlet manifold ontop, and you can still run the ECU from the ecotec if you transfer the sensors i'm guessing.

Sure it would work? wont it have issues using the ecotec ECU in regards to the CAS and other such things?

keep going, custom camshaft to suit different lobe positions, and IEIEIE valve arrangement vs EIIEIE(or other way around, cant remember)

lots of work, i was going to run a vr ecu, since i was going to have 6 throttlebodies and no plenum.