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Originally Posted by Diamond Dave
(Post 4661121)
How much did just the throttle body alter the tuning in your case I don't recall if you mentioned it specifically?
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Seems like all over 4500 the TB is too small. But you are right, all parts wich flow air have to be calculated to fit together. At this time i will go with the old FA, 68mm TB, worked intake, better cam, reprogramed ecu, better pistons and stainless marine exhaust with o2 sensor. I‘m actual not sure if i should go 540 and new bigger heads. |
The old heads look too wasted to re use them. I get some Dart Pro 1 heads.
How would you go forward, with 509 or a cast 540 set. A cast 540 set would only be a few hundrets more that the stock 509, but cast.... I´m going to order the Crane 168741, will the stainless marine exhaust work without reversion or do i need another exhaust system? I had the stainless marine exhaust for 14 years of saltwater operation, the stainless steal riser are ok, i only need the lower parts. But if there could be reversion i would go with anything other. I drive switchable silencer endtips. I may not make too much noise in my harbor and due to the stellings extension box i do not have an under water exhaust through the drive. |
Originally Posted by articfriends
(Post 4661760)
I bought some 1 7/8 vette headers to try, thinking they will bump bump up tq close to what manifolds made and knock off some top end hp, if they dont, ill buy some other ones. Its a big pia for me to run wet exhaust, we killed a 02 sensor w the Eddie manifolds too. Trying to find something thats as close as possible to numbers manifold made.
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I would love to, but there is a 75db restriction in our bay. |
Does Bob Madera still make a set or cams for this motors? I gave him an email but got no response.
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