XR7 Dave said:
I wasn't asking if you'd seen them, I just wanted to know what 3 SC's were exceeding 900cfm that you were referring to and which I assumed were exceeding 450rwhp. Maybe I missunderstood. I know David's car wasn't anywhere near 900cfm with his Eaton and is only getting close with his AR.
Since I haven't seen them personally, I cannot verify their claims so I would prefer not to identify them. It is my presumption that the owners would or will make that information public if they so choose. I reviewed two data logs that indicated MAF readings over 900CFM and the third person stated they pegged their 80mm C&L MAF with a green tube.
I'd still like to hear what Chris has to say about his though.
Accufab also claims a 5 HP increase on a stock GT engine with their dual blade 75MM TB, not a single like ours. In that case the TB should be able to flow somewhere around 1800cfm?
That sounds about right, their Lightning unit flows around 1700 CFM and is similiar in size. I don't think each butterfly is 75mm though, I think it may be the entrance way since they have a bellmouth entrance. I suppose I could ask Fred if I get time to stop by there next week.
I know this sounds like arguing so which I'm not trying to do, but these are numbers I've seen for the Mustang single blade TB's.
Which also correlates with data I've seen based on other tests or standard data. For what it's worth Charles told me that a 76MM C&L flows just as much air as his 85MM TB.
This isn't to say that a 75MM is not enough for most anyone in our group and is in fact what I last ran on my car.
Not to worry, I haven't taken it as being argumentive, I see it as an opportunity to get the facts straight for everyone.
My #s came direct from the horses mouth, Fred and I had a discussion about this when I was at Accufab. I believe he had just flowed the 65mm unit a few days prior. He also posted exact #s on V6power.net in this thread:
http://www.v6power.net/vb/showthread.php?t=26309&highlight=throttle+body+flow
Post # 62 quotes their 65mm V6 mustang specific unit at 640CFM, the 75mm unit for the stang GT @924CFM and their R version of it at 1040CFM.
Exactly what flow rate did Charles quote his 85mm TB at?
Anyhow, I have nothing against the 85mm unit on our cars, I just don't see it as a needed item for over 99% of the SC population and feel the additional cost over the 75mm piece should be invested elsewhere.
Paul