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Anders Dinsen
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« Reply #23 on: May 14, 2008, 09:58:13 pm » |
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He he, shall think about this one, '
IMHO 45mm tb's are too large for an engine that revs out at 6300rpm.
Current restrictor size for LMP1 prototypes is 48.5 mm (one restrictor for the whole engine, 4 valves per cylinder, normally aspirated, less than 3 litres), and they get more than 500 BHP out of that - so yes, 45's can breathe a lot of air!  But since airspeed means less on TB's than on carbs, I don't think it matters a lot whether you choose 40's or 45's. Cross section is 25% larger on the 45's, and it may be a little easier to get the idle and low revs working perfectly, but as soon as there is any kind of opening, it shouldn't matter. Stig's (Megatech) offering should be quite attractive for the seriously interested.
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1982 Talbot Matra Murena 2.2 prep 142 (under restoration)
Used to own: 2001 Renault Matra Grand Espace "The Race" V6 24v 1997 Renault Matra Espace 2.0 8V 1987 Renault Matra Espace J11 2.2
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krede
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« Reply #26 on: May 15, 2008, 09:48:38 am » |
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