The reason for not dropping in the entire 7mgte engine is that the head and manifolds have already been stripped from this car. Because I already have the turbo setup, and the head and intake from the 5mge, I was just figuring if it was worth the effort to drop in the 7 block.
I'm also trying to do this car on a budget. I currently have $2300 into the '82', and that includes purchase, turbo setup, and fresh paint job. I'm doing everything myself except for paint.
I reckon that you'd probably best to leave the 5m block. Another thing that I just saw on the mk2 mailing list is that the 5m uses a different pulley style to the 7m, V vs ribbed I think. Apparently the 6m has the V style pulleys, so you'd need to track down the appropriate pulley(s) from one of them to match the 5m.
Instead of getting the 7m block I'd say you might want to consider just getting some forged pistons for the 5m block. Having oil squiters isn't going to make a huge difference IMO for lower power outputs.
And good work doing it on a budget, sounds like it'll be a bit of a weapon :twisted:
also some might argue that the 5m head will be stronger with its bigger valves and flow better for boost.
There is that, but I can't see that argument standing up to be honest. There is no way that a 2 valve head will flow better than a 4 valve. A better flowing head at the very least will give you better fuel economy correct? If, assuming that the 2 valve head does indeed flow better than a 4 valve, why do manufacturers even use a 4 valve head? If the 2 valve is better then they should be using that. As well as the fact that is is cheaper and easier to make than a 4 valve head.
The 2 vavles *might* be stronger than a 4 valve head. But I've never heard of a 7m busting it's valves because they were *weak*.
Again, just my $0.02