EFI Heads onto a Blue 253

[johnmic]

Gday, I have a Blue 253 in my VH Commodore and just want to know would the EFI heads of a later model commodore fit the motor.

Cheers all

[soop]

Yeah they will.
But you need a new intake manifold, extractors and cam to suit the heads.

[delcowizzid]

and have to make sure the valves dont hit the bore if its a stock bore size 253

[soop]

With a standard cam they shouldn't.

[SL/ENUT]

It will, valves are to large for the bore.

[soop]

been done quiet a few times with no issue. The valves don't hit.
Ask Danny8.

[delcowizzid]

he has an oversized bore

[DANNY8]

Yeah I've done it and it works fine (my bores are 30thou over), haven't really tried it out to much yet. Bit boggy down low but as soon as ya get goin she revs pretty good. I'm just using a stock EFI cam and a quaddy on mine tho. If I get another set of heads I might mock one up on a std bore 253 block and see if the valve will clear. But might not be for a while.

[soop]

lol we just turfed a block.

[delcowizzid]

Yeah I've done it and it works fine (my bores are 30thou over), haven't really tried it out to much yet. Bit boggy down low but as soon as ya get goin she revs pretty good. I'm just using a stock EFI cam and a quaddy on mine tho. If I get another set of heads I might mock one up on a std bore 253 block and see if the valve will clear. But might not be for a while.

i thought you would of injected it LOL

[johnmic]

Thats what I,m thinking about, putting the efi heads, cam and injector manifold instead of carby..

[DANNY8]

i thought you would of injected it LOL

Nah I wanna stay carby. Only got the quaddy on there and stock cam until it passes a regency inspection. Not even sure if they'll pass it anyway coz of the VN heads and cam.

[delcowizzid]

would be mean with bananas if they are restrictive on the 304 should be about perfect on 253

[pjdm1980]

Wouldn't you just put a 308/304 in it if your going to put money into it?