Disappointed after modifications!
I don't think that long tubes would make that big of a difference, I think I am going to have to go with either bad porting or bad dyno. Mine put down bigger numbers with a cam half that size through stock heads and stockers usually put down 245-260 on that dyno so it was not being generous.
I went back and read the original post and didn't see anyhting about injectors in there?? Have you upgraded your fuel system?? If so what do you have in there what is your duty cycle on your injectors, fuel pressure?
the stock injectors are only good for about 400 fly wheel horse which is basically right around what you dyno'd at the rear wheels.
He is an M6 so he should dyno a little higher but for an auto your numbers are correct, I put down 339 on a smaller cam and my 30#ers were at 80% so it is pretty safe to say that if he is running stock injectors on a cam that size he is working those things like a rented mule
Im using stock injectors, i have walbro 255 fuel pump & Aeromotive fuel pressure regulator.
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Verdad Gallardo I will, its just that the nearest track is about 300 miles away from my town.But i'll have to try & see what the results are.
He is an M6 so he should dyno a little higher but for an auto your numbers are correct, I put down 339 on a smaller cam and my 30#ers were at 80% so it is pretty safe to say that if he is running stock injectors on a cam that size he is working those things like a rented mule
there is your problem ACE! Your builder failed to mention you'd need bigger injectors or what!?
I will be hitting a 150hp shot of Nitrous & i've asked LE if this is a good cam for such nos shots & said it is a great cam & he also stated that its a very big cam for a 350.
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yea when it comes to porting heads, not just any A-hole can go and do a good job, air flow is a science. thats why people usually goto guys like LE and AI that have done a ton of LT1 heads and know what the tricks are to extract the most power outa them.
yea when it comes to porting heads, not just any A-hole can go and do a good job, air flow is a science. thats why people usually goto guys like LE and AI that have done a ton of LT1 heads and know what the tricks are to extract the most power outa them.
Also what part of the country are you in?
Throw some 36#'ers in there and it should jump the HP right up to around 380rwhp i'd say since you're running the shorties.
Maybe a tad higher if the port job was a decent one.
how much did he charge for the porting if you dont mind my asking?
you're in Saudi Arabi too arent you? Thats why the damn tracks 300 miles away!
I don't think long tubes make that big of a difference over shorties, I am getting ready to put shorties back on my car after the 383 is done. I hate having to pull some shady **** every two years just to get some stickers, CARB sucks.