Hear, hear.
Kees Oudesluijs
NL
Editorgary@aol.com schreef:
> In a message dated 9/10/09 11:08:18 AM, healeys-request@autox.team.net
> writes:
>
>
>
>> I'm pretty sure that in the case of a factory Healey, the added flow
>> is going to give an increase in performance as the stock system--BN4-
>> BJ7--is smaller than the opening allowed by the carbs.
>>
>> Wilko
>>
>>
> The only way to tell (and the only way to be sure) is to
> measure/tune/re-measure the car on a chassis dyno ("rolling road" to our
>European friends). My
> bet is you'd get a few horsepower just by checking how your timing advance
> and carb tuning is set, and then with the bigger exhaust you're bound to get
> a few extra hp past that, just because the system was originally
> exhaust-constricted.
> But there's no substitute for dyno tuning when making significant changes
> to intake, ignition, or exhaust.
>
> Best
> Gary
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