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individual throttle bodys

stick100

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i,ve been looking for individual throttle bodys for my gts 300. I love the look of the harrop intake but its pricey the stack looks alright and its cheap also foound one made by twm any one have any ideas which is best
 

ephect

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i guess the first question is, whats your price range your willing to spend?

do you have some links of the 2 u've looked at?
 

soop

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The Harrop is about as good as you're going to get.

Be warned, tuning them isn't easy.
 

stick100

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harrop is my first choice tuning wise i'am going to use efi live
i'am also i'am going to run a 232/234 cam and springs
what do you think about the stack itb is it any good
 

soop

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No idea on the stack ITB's.

I mean actually tuning them is tricky. A bloke on here had them on his 409 Clubsport and always had trouble with take off apparently. He ended up going back to a FAST 102mm manifold IIRC.
 

stick100

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harrop is what i'am going to go with i think tuning is somthing i'am going to have to deal with but thats the trouble with any engine build i think
 

soop

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Yeah well thats it, if you're tuning it yourself, then you've unlimited time to get it right. Gets expensive when you're paying someone.
 

ephect

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IIRC autospeed had an article on tuning individual throtts, went through both idle air then butterfly syncing
 

stick100

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lucky for me i've got my own shop so time i have efi live is quite cheap so that makes it better and it comes with a scan tool as well which is always good
 

ephect

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efi is great for tuning, but u cant computer tune the itb, if they're not all sync'd and sucking the exact amout of air, and all opening equally. these have to be mechanically tuned not computerised first, before you can adjust the computer side of things...

u'll need to make sure they are flowing the same amout of air throughout the throttle position.
 
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