Originally Posted By SFO
Originally Posted By Gambalunga
Originally Posted By SFO
ARP4 has unique engine, unique suspension and unique interior, none of which +4SS had (OK, it had a more highly tuned engine)

Surely you mean the ARP4 has a more highly tuned engine than the Plus 4 SS?


I meant more highly tuned compared to a standard +4 .. no idea whether Cosworth engine is more highly tuned than +4 SS

Yes it is more highly tuned, but it is also based on the Duratec engine whereas the SS engine was a Mazda MZR engine with variable inlet valve timing. There is no dyno chart available for the Cosworth (that I can find) but I am fairly certain that the tuned MZR engine would have more torque (due to the variable valve timing) at low to mid range than the Cosworth. The Cosworth would then develop more power as the revs increase.

Whilst at 225hp it is not the most powerful of the two litre engines built by Cosworth it is still fitted with a lot of expensive bits. In this respect it is more similar to the Baby Doll which is fitted with a 250hp race tuned (for Class B) Omex 2lt Duratec engine. But, needless to say, the Baby Doll is much more hard edged, not only with the engine but the way it is fitted out.

Originally Posted By Cosworth web site
Cosworth start with all the individual brand new, Geniune Ford components. The lightweight aluminium cylinder block and cylinder head are expertly modified and then assembled with Cosworth camshafts, Cosworth forged pistons and rods (on applications), Cosworth barrel throttle, Cosworth dry sump, Hi flow injectors, race alternator, starter, coils, spark plugs.

Peter

[Linked Image]