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injector size for turbo application using a T70

This is a discussion on injector size for turbo application using a T70 within the Forced Induction forums, part of the LSx Technical Help Section category; hey guys whats up. im new to the forced induction setup and im learning but would like more info. im ...

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    spooled LS1 monte ss spooled88monte's Avatar
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    injector size for turbo application using a T70

    hey guys whats up. im new to the forced induction setup and im learning but would like more info. im running a T70 on my 98 LS1 and was wondering what size injectors i should use. according to my calculations im gonna need 60lb injectors but someone also told me 42lb would be ok. anyone have any info. thanks

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    just get the 60's now and you'll have plenty of room to grow.

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    spooled LS1 monte ss spooled88monte's Avatar
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    excellent thanks

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    Junior Member dkrowner's Avatar
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    i 2nd the 60lb's,its better to buy once then buy twice
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    60's all the way, you can take out fuel at lower rpm with a tune and add it in when needed.

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    WS6 God chewy99ws6's Avatar
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    X3 on the 60's, that is what I run and I have a T-70 also

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    Member cailey37's Avatar
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    60's should be fine but as far as room to grow.....well....you go much further and I'd be curious to see what kind of duty cycle you have......sooner or later you're going to have to get low-impedance injectors....

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    spooled LS1 monte ss spooled88monte's Avatar
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    this is my first attempt at forced induction, im learning as i go. i appreciate everyones input and direction as to where at what to get. ill be trying to post pictures as i go along to update everyone. ive been looking at injectors and the cheapest ive seen 60lb for was about 400$ anyone else find them for cheaper?

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    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by cailey37 View Post
    60's should be fine but as far as room to grow.....well....you go much further and I'd be curious to see what kind of duty cycle you have......sooner or later you're going to have to get low-impedance injectors....
    My friend David made 852rwhp with 60's and meth; BRFPR - base pressure 65ish lbs. I am at a much more idle friendly 50lb base, also boost referenced, and at 17psi I should be in the mid 700s. I say I should, because the car made right at 600rwhp at 10.2psi on a tune that was short 3-4degrees of timing through the band and mid to low 10s AFR. Add 7 psi, 3-4 degrees of timing, and getting the AFR to 11.3-11.4:1 and lord knows it ought to make at least that much more. No time to dyno my car though Oh yeah, at this level, I am in the low 80s % IDC. If I went up on base fuel pressure, that % would fall.

    Furthering the cause of high impedance injectors are Racetronics new 79lbers. I have not worked with a set yet, but have high hopes.

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