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1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
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1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
roman wrote:well, in a way your right and in way you arent. what break specific fuel consumption are you assuming? i have dug up some old notes saying 6 x 300 x 1.3 =2370 cc. this means i was running 300 cc injectors at (1.32)2 x 3 = 5.2 bars. now 2370 cc/min at 0.25 g/h/hp is 2.37 x 60 X 0.78 / .25 = 444 hp. even at the mentioned 4.5 bars 6 X 300 x root (4.5/3) = 2205 meaning 413 hp. 250 g/h/hp by the way works out to 0.25/0.454 = 0.55 lb/h/hp bsfc. if the injectors are maxed out, the are maxed out. please realize that all this is more than 5 years behind me. i think, however, that these were my pre motec figures and that i went to lower pressure and larger injectors later (volvo???). one of these day i will try and start my old pc with all the logging files and then i will let you know.
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1407
Fri Apr 16, 2004 4:50 pm
Kent
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
Tony Smith wrote:I'm sure thats the engine they used on the space shuttle - certainly looks like it. Something thats come out of this thread re - exhaust manifold design - are we now saying its not so much the manifold restriction but rather where the manifolds are siamesed into the turbocharger that causes all the power loss?
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
roman wrote: what break specific fuel consumption are you assuming? i think, however, that these were my pre motec figures and that i went to lower pressure and larger injectors later (volvo???). one of these day i will try and start my old pc with all the logging files and then i will let you know.
the methanol is a fuel, so no further enrichment by the injectors would be needed. additional advance due to the cooling of intake charge.
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