[Jeff01]

I don't have access to a Mk1 engine but looking at pics. of both it does seem that the MK11 injection set-up is a bit more bulky. My engine has it's sump 40mm below the bottom chassis rail and sits further back in the chassis than standard, which also means that that the standard Mk11 exhaust manifold exits very close to the passenger footwell requiring some fancy pipework to get outside the chassis. Looking at the bonnet/nosecone combination last night, it does look as if a small bump will be needed. I am in the workshop later today and should be able to confirm go/no-go later. Pics. when I can get my ruddy camera to talk to the PC! Thanks Ben for your kind offer. On a more general note, I used Vauxhall engines in race cars for a while and memory suggests that they were a lot less bulky than the Mazda lump. The other thing is that I think most people are using the Mk1 engine as in the Saturn car,perhaps without clearance problems, and in some ways this engine would seem to be a better choice. For example, I am not using the OE ECU so a way has to be found to overcome the fact that the ECU controls the alternator in the MK11, although I believe I have solved that problem. I have a feeling that the MK11 MX5 is going to be the most popular donor for a variety of self build cars in future, primarily because they are well engineered, cheap, have bullet proof engines and the fact that they are already sports cars! Maybe when I get really bored I will set out with my tape measure and conduct a survey of all available twin cams engines! One last point is that all of our cars are different in some way, which is one of the principal reasons for doing what we do, and it follows that my engine might not fit under your bonnet..............etc. End of lecture.