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What kind of TB?

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Old 02-19-2007, 11:18 AM
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Default What kind of TB?

Been searching through previous threads but I couldn't find an answer...

What is the largest throttle body that will work with the LS6 intake manifold (stock on '02 Z28)? Does that depend on brand? Any recommendations?

note: I have an 85mm MAF, mid-size cam, LT headers....... heads in future.
Old 02-19-2007, 11:31 AM
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I am not sure on the size but before I spend the nut on a TB, you gotta determine where the car is going to go. Like if you wanted a FAST intake, there are 2 sizes. You dont want a 78mm FAST TB and then want a 90mm intake, you gotta rebuy stuff.

You may want to consider a good port and polish for your LS6 intake. IMO
Old 02-19-2007, 09:11 PM
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I would definitely go with a ported TB. It is relatively cheap and you will pick up some increased throttle response and some extra power. There are a ton of guys who are making gobs of power still using the stock ported TB. Yeah you will pick up more power w/a bigger TB, but do you have the mods that REQUIRE that? At the time it doesn't seem like it so I would say go w/the ported stocker. Hope this helps.
Old 02-19-2007, 10:35 PM
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You could probably see some good gains from a Fast 90 setup....but if you don't want to spend a lot of money, then just port your stock throttle body. Dont bother buying a BBK or any other expensive throttle body. Just port your stock throttle body...and let that bitch rip!!!
Old 02-20-2007, 01:07 AM
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okay.....so when would someone need a tb? will it work on a non-cammed car with nitrous? i wont be doing a cam for a while but nitrous is already on order.....will a 90intake and 90tb work or worth it?
Old 02-20-2007, 01:09 AM
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if youve got the money just go ahead and get a 90/90 setup from FAST....its not cheap though....for the ls6 its a stock 75mm hole....so use your imagination
Old 02-20-2007, 01:36 AM
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how much hp would a 90/90 setup bring?
Old 02-20-2007, 01:41 AM
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a good bit....30-40 tb and manifold....your talking over a grand though
Old 02-20-2007, 08:21 AM
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Originally Posted by kbronSS
okay.....so when would someone need a tb? will it work on a non-cammed car with nitrous? i wont be doing a cam for a while but nitrous is already on order.....will a 90intake and 90tb work or worth it?
there is no right time......its not like a cam were you need the supporting mods like LTs.....if you put a ported one on a stock car you would have a decent power gain
Old 02-20-2007, 08:35 AM
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Mine was ported and it felt way better, but at the end of the day it still rubbish compared the fast90/90!
Go the fast90/90 anything else is just wasting money and time.
Old 02-20-2007, 11:03 AM
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A ported stock TB is a good mod for the ls6 intake. They work well together. No need to go aftermarket tb on the ls6 intake.

If you have the money, and your setup is somewhat wild, it makes sense to go with a FAST 90/90 combo. Usually just a cam is not enough to warrant the money for the 90/90.

Another option is TPIS opens up your ls6 intake to accept a larger TB, but it cost more too. Then you can run a 90 mm TB with your ls6 intake. Somewhere in between a regular ls6 intake and a 90/90 combo.
Old 02-20-2007, 03:52 PM
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Originally Posted by lsx24
A ported stock TB is a good mod for the ls6 intake. They work well together. No need to go aftermarket tb on the ls6 intake.

If you have the money, and your setup is somewhat wild, it makes sense to go with a FAST 90/90 combo. Usually just a cam is not enough to warrant the money for the 90/90.

Another option is TPIS opens up your ls6 intake to accept a larger TB, but it cost more too. Then you can run a 90 mm TB with your ls6 intake. Somewhere in between a regular ls6 intake and a 90/90 combo.

well i will have everything except h/c for about a year or so, including a 125dry shot.....i have not decided if i want to go with a h/c route or some type of forced induction.
Old 02-20-2007, 04:07 PM
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a FAST intake an tb isnt worth no damn 30-40hp. maybe on a heads and camc ar but not on a stock to bolt on car. id say 25ish tops
Old 02-20-2007, 07:36 PM
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i got 22 out my ls6 and porting my TB (14intake/8tb).....soooo your saying upgrading to a 90mm TB and a 90mm intake wouldnt gain me at least 8 more to the wheels?....
Old 02-20-2007, 08:29 PM
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go ported t/b, good gains, save money for other stuff




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