elbekko Posted February 28, 2015 Share Posted February 28, 2015 Aha. Time to bolt on a big 'ol supercharger then Quote Link to comment Share on other sites More sharing options...
Bingy Posted February 28, 2015 Share Posted February 28, 2015 Something like this then? Came off a 3.9 tomcat. Want to get the 4.6 running properly before i literally blow it Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 28, 2015 Share Posted February 28, 2015 Ooh Quote Link to comment Share on other sites More sharing options...
Henry Webster Posted March 4, 2015 Share Posted March 4, 2015 Hi Ole, Well worth spending some time talking to Roland at ACR. I think it is his opinion that you need bigger valves to get upwards of 250BHP. I built my earlier 3.9 (Serpentine) with a Piper Cam and the original ECU - with a careful (basically standard) build and some very light head work it made 225BHP on 14CUX and a distributor. When I decided to do away with the Dizzy I handed it to Roland. He told me that with a conversion to OMEX 710 and with a session on his Dyno that we would probably get not much more power on paper, but the driveablility would make it feel more like 250BHP. He was spot-on it is now quite a different engine, but the output is very similar in figures. Roland knows his stuff and will do everything from advice and parts to full build! Most of the UK Rover and AJV8 off road motorsport guys use him now. H Quote Link to comment Share on other sites More sharing options...
oddballrovers Posted March 4, 2015 Author Share Posted March 4, 2015 Hi Henry That sounds good, figures is not important driveablity is the most important thing I do know that from setting up MC raceengines on dynojet dynos in a former life and that is also the reason I will use either MS or something similar. You mention a careful build, did you not get it ballanced? what revs do you have the rev limiter set to? Ole Quote Link to comment Share on other sites More sharing options...
Henry Webster Posted March 5, 2015 Share Posted March 5, 2015 No I didn't balance it in the end and fortunately that turned out OK, but I probably will with the next one. I used to shift at 5500 with 14CUX, but now have the rev limiter set to 6500rpm and relatively regularly hit it in the low gears. H Quote Link to comment Share on other sites More sharing options...
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