Quote:
Originally Posted by damnslowtsi
I have a question for you guys, how much do you think is lost in performance by not using a bigger throttle body? I feel that it is kinda a waste of money to get a SMIM flanged for a standard size t-body even though some folks have made really nice power with them. Another question, what is the plenum volume on this manifold or how does it compare to other known brands like Magnus/JM race? Do you have any pics of the inside of the plenum?
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It all depends what your goals are and how big of a turbo you have to determine the size of a the throttle body and the plenum size you need.
Larger plenum and bigger throttle body is best used on a big turbo and a drag built engine like twicks69's car which gain 100hp+. However if you have a 16g a SMIM is the last thing you should be thinking about. A bigger plenum and throttle body hurts the spool rate. It's please self-explanatory in the first post of the dyno results.
And about your question in comparison with JM Fab and Magnus I doubt anybody know that. As mention in the posts above we are wait for FFWD test results.