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78mm FAST Throttle Body

This is a discussion on 78mm FAST Throttle Body within the General Help forums, part of the LSx Technical Help Section category; Another question lol. I'm bout to buy a 78mm fast throttle body. Will that make a diference on my 98 ...

  1. #1
    Senior Member 98maro's Avatar
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    78mm FAST Throttle Body

    Another question lol. I'm bout to buy a 78mm fast throttle body. Will that make a diference on my 98 z28? Or I should get somting bigger than that. Thanks

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    Veteran Hi-Po's Avatar
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    Hardly, especially for the price those still go for used. IMO, upgrades to the throttle body and intake start at 90mm. A ported stocker and a LS6 will work well for a mildly modded ls motor.

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    Senior Member 98maro's Avatar
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    I'm buyin it used for $150. The guy said it flows really good. The stock tb on mine it's 75mm so it's not a big difference.

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    how old is it? how many miles did he put on it?how good is the return spring? how loose is the blade shaft?

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    Member jerri311's Avatar
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    I wouldn't waste your money. Go bigger.

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    Senior Member karpetcm's Avatar
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    You can spend less on getting yours ported and polished and you know that it already works fine.

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    Senior Member 98maro's Avatar
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    He said he had it for 5k miles on the car.
    It looks alright blades are kinda loose. The little spring look kinda tight.

    I was thinkin bout polish and portin my stock 1. Where should I go for dat and any idea how much that go for? Thanks

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    Senior Member karpetcm's Avatar
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    Go on ebay, i dont know if there is someone on here that does it.

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    Senior Member 98maro's Avatar
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    On eBay I found 70mm ported n polishd for 70 dollars. It's smaller than mine

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