WarrenL said:
Stina, how do you think your engine performs with the 3.9 cam and SD1 heads?
Hi Warren .
I'd say well , i know someone'll be along in a bit and say how well theirs goes with a 4.6 in it !
For what i put into it time and cash wise i'm more than pleased though . I did go a funny way about it out of necessity , as in visiting the inside of the front cover , and the heads twice due to having to deal with issues before i was ready to do the cam and head swap . So i ran it for a while with just the oil pump and timing gear upgrade . I think the timing gear really livens up an older motor , dealing with the stretch in the chain and pulling the timing back into line .
Also i'm comparing it to how it was before ,( although it was no where near worn out ) i don't know how it would of gone with a new but standard cam , and the heads reconditioned .
All i can say is it's quite indecently quick off the mark for an auto , and flies when the kick down is used , on the other side of the coin it's still really torquey and roll on acceleration is amazing .
The total spec is .
3.9efi cam ( new lifters )
uprated oil pump
steel timing gears and double row chain
SD1 heads
free flow filters inside original canister
"S" exhaust manifold and 3inch stainless system
electronic ignition
Carbs rebuilt
It all seems to work together and makes a nice package .
Hope that helps