individual throttle bodys

[stick100]

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]

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]

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

Be warned, tuning them isn't easy.

[stick100]

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]

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]

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]

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]

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

[stick100]

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]

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.

[stick100]

thats the same as tuning a twin carb engine i would have to get a air meter

[ephect]

thats what im saying, you still have to first setup and tweak each screw on to adjust the butterflies on each thrott, then adjust idle with an air meter before you get tuning.

[soop]

Which is what people have been doing since the dawn of time.

Its not voodoo LOL.

[ephect]

indeed, but coz he kept saying computer tune & efi, i was just making it clear

some mothers have them..

[soop]

yeah I ge ya, but for most normal people getting all the throts opening at the same time is just part of installing them.