Just a quick post of my last Pinto engine. To give people an idea what can be expected from a road engine. This engine was build up round parts left in my workshop, rebore to 1 mm, KS pistons, polished crankshaft, new bearings, Melling oil pump (very happy with it, very quick full oil pressure), Vulcan stage 3 head (affordable road head and for sure able to make lot more power as what is seen in this engine setup), KENT single valve springs, little over 10/1 CR, Piper BP285 (I wanted to put a personal "touch" into this profile but unfortunately they failed). It's is almost sure I would have pushed up the low RPM torque a little. Very difficult to get a personal profile for a Pinto. Don't have so many problems with flat followers as in most other engine.
Same torque would probably be pushed up also with 44 IDF trumpets but I forgot to test and anyway, there is no room for them in the Capri MK1. Carb set 44 IDF and ended up with 32 mm chokes (lost 2 - 3 Bhp on top but had a nice +/- 10 Nm extra from the very beginning up to almost 3000 RPM). I did not had 40 mm ready but for sure this engine could have been build up round a good set of 40 IDF and would possible be more progressive on throttle and is always a nice credit. People seems to forget but big carbs open a larger "gap" in a smaller movement (less degrees to open) and can give eretic driving. Try a set of 40 and 45 DCOE on a Jaguar and you will know what I'm trying to explain.
Exhaust is my favorite Small Bore Ashley. Cost zero to nothing. Perfect up to +/- 160 - 170 Bhp.
You will notice the very small air filters needed to fit the engine into the Capri without cutting the bonnet but please note, I did measure with and without these small filters and after correcting the jetting I ended up exact the same all over. So they are not restrictive but I do believe you will need to clean them more regular.
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