travill 0 Posted March 18, 2007 Worked out it causes a 13.43% decrease in area. Will this make much of a difference in restricting airflow to a std head or does it not really matter and the greater airspeed would equal it out anyway?? Share this post Link to post Share on other sites
pug_ham 244 3 Cars Posted March 19, 2007 Personally I'd say yes it will make quite a difference loosing over an 1/8th of the throttle body volume & the amount of work needed to sculpt an 8v tb onto an Mi inlet would make it a pain. Graham. Share this post Link to post Share on other sites
travill 0 Posted March 19, 2007 Gutmann i16v's used them, surely they wouldn't have if it disurbed the flow that much and gave less power? Share this post Link to post Share on other sites
Dom9 2 Posted March 20, 2007 I thought they were larger? Maybe he used a bored out one, which is easier with the 8v TB... A French guy dids it a while ago and sent me a photo... Looked good! What's the ID of an 8v TB? And the ID of each of the throttles in the Mi TB? Share this post Link to post Share on other sites
pug_ham 244 3 Cars Posted March 20, 2007 The Gutmann has a bespoke inlet that was made for them so in that case it would fit straight on, whether the standard TB is used without any modification I don't know. The standard 8v TB is 55mm inlet & 59mm outlet The Mi has two 37~mm ports. Graham. Graham. Share this post Link to post Share on other sites
Gentrix 2 1 Cars Posted March 20, 2007 Gutmann used this TB cause it was already in all GTI´s which they converted. And the Mi16 engine came new without any ancillaries. So to save cost, they made the inletmanifold to fit the 8V Throttlebody. This information was from a Gutmann employee. andi Share this post Link to post Share on other sites
travill 0 Posted March 20, 2007 gentrix i thought that may be the case! ah 37mm i did the calculation with 38's so it is a bit closer Share this post Link to post Share on other sites
