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Unless you plan on porting your intake manifold, you really aren't going to see any gains. The throttle body opening on the stock manifold is only 80mm..........Think of the manifold opening as a doorway, and the TB is a door...........putting on a bigger door, without increasing the size of the doorway isn't going to do anything at all.
 

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Not sure but i think U need to get ur mani ported n match it to 87 to get full hp gain.
 

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The 87mm will fit on the stock manifold and it will fit the Bwoody 4", as that is what I had on there. They are right though, to take full advantage of it, you should get your intake ported, but it won't hurt you if you don't. I did them separate and then when I got a good deal, I had the intake ported.
 

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Since we are on TBs...I too am on the fence on what TB and Port size to go with...I was told profesionally that for the 85mm TB and port to the 90mm TB and Port there isnt to much of a gian...is this correct?
 

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Since we are on TBs...I too am on the fence on what TB and Port size to go with...I was told profesionally that for the 85mm TB and port to the 90mm TB and Port there isnt to much of a gian...is this correct?
Gains are really minimal from 87 to 90mm. You may see more gains on forced induction, but that's it. I ran the same times as guys with the 90mm and the same set-up as mine. I think you'll only notice it at big power levels. Someone else can probably give you numbers though.
 

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Gains are really minimal from 87 to 90mm. You may see more gains on forced induction, but that's it. I ran the same times as guys with the 90mm and the same set-up as mine. I think you'll only notice it at big power levels. Someone else can probably give you numbers though.
Yeah I think Im going to go with the 85mm TB with 85mm ported and polished mani...the guy that is going to do it for me seams to offer a good price for that set up...I just noticed that alot of guys run the 90mm TB and port so I had to figure out if it was worth the extra cash
 

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How are the gains from stock to 87mm? TB and ported intake..
 

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How are the gains from stock to 87mm? TB and ported intake..
Gains from a TB alone aren't much, but with a ported intake you'll notice some gains
 

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Does anyone have before and after numbers? Just curious..
 
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