LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Changing throttle body?

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Old Mar 6, 2007 | 06:53 PM
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Default Changing throttle body?

I would like to buy a throttle body that is powercoated. Going from a stock 48 to 52mm cause any problems? Is it worth it? Are they hard to change out? I'm not real handy and wondered if its kind of easy. Any ideas or thoughts?

Also what could I sell mine for becasue the company will give me $48 back on a core charge. I'm sure many have done it but I'm new to it. Thanks
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Old Mar 6, 2007 | 07:44 PM
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I run a 58mm in my Caprice and I love it! They are very easy to change just make sure you have some towels handy for a little bit of coolant that will come out of the TB. I had my intake ported to match the TB but I dont think you will have any problems.
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Old Mar 6, 2007 | 08:04 PM
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Originally Posted by Ntimid8r7
I run a 58mm in my Caprice and I love it! They are very easy to change just make sure you have some towels handy for a little bit of coolant that will come out of the TB. I had my intake ported to match the TB but I dont think you will have any problems.
Thanks, for your input. I think I can do it.
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Old Mar 6, 2007 | 11:25 PM
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No coolant, you should have it bypassed as soon as you bought the car lol
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Old Mar 7, 2007 | 11:01 AM
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Coolant bypass doesnt make a difference.
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Old Mar 7, 2007 | 11:48 AM
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Originally Posted by Ntimid8r7
Coolant bypass doesnt make a difference.
That just opened up all kinds of ****..
TB BYpass on LT1: Dyno proven 6RWHP, 7RWTQ here, I have seen many similar results.
http://ws6.com/mod-8.htm
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Old Mar 7, 2007 | 12:24 PM
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If you are looking for 5 horses then its worth it.
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Old Mar 7, 2007 | 12:44 PM
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Originally Posted by Ntimid8r7
If you are looking for 5 horses then its worth it.
5 hp is 5hp, no matter how you look at it. hp is hp, 1, 2, or 500 everyone tries for whatever they can. So if it's proven, why the hell not do it?
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Old Mar 7, 2007 | 03:08 PM
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if you go to a larger throttle body you'll need to increase the trans line pressure.
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Old Mar 7, 2007 | 03:28 PM
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Really, what does that do to it? Cause of the TPS or something?
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Old Mar 7, 2007 | 03:30 PM
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Originally Posted by the_merv
Really, what does that do to it? Cause of the TPS or something?

it's not much of a deal with a 52mm as it is with a 58 (as with a 52mm a trans-go shift kit will take care of the need for increased pressure) but since you're moving more air at lower throttle positions the transmission is going to have less line pressure. I think usually a 5% increase is usually good to go. Althought for 6 speed guys it doesn't matter
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Old Mar 7, 2007 | 07:00 PM
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Originally Posted by buffman
it's not much of a deal with a 52mm as it is with a 58 (as with a 52mm a trans-go shift kit will take care of the need for increased pressure) but since you're moving more air at lower throttle positions the transmission is going to have less line pressure. I think usually a 5% increase is usually good to go. Althought for 6 speed guys it doesn't matter
To take off the Throttle body is it just the four bolts in the front? a few adapters and you can take it off? Before I change it out I wanted to make sure there's no hidden bolts I can't get to easily? Thanks
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Old Mar 7, 2007 | 07:14 PM
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Thats it..
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Old Mar 18, 2007 | 04:47 PM
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Originally Posted by buffman
it's not much of a deal with a 52mm as it is with a 58 (as with a 52mm a trans-go shift kit will take care of the need for increased pressure) but since you're moving more air at lower throttle positions the transmission is going to have less line pressure. I think usually a 5% increase is usually good to go. Althought for 6 speed guys it doesn't matter
Getting ready to order a 52mm throttle body so you're thinking I won't have to increase the trans line pressure?
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Old Mar 18, 2007 | 08:16 PM
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well if you don't have a shift kit, I'd have the line pressure bumped up. You could get by not doing anything with a 52mm TB, for a little while..
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Old Mar 19, 2007 | 07:32 AM
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Originally Posted by buffman
well if you don't have a shift kit, I'd have the line pressure bumped up. You could get by not doing anything with a 52mm TB, for a little while..
Is this something I could do or do I have to send the pcm off to have it done?
I don't have a shift kit and my car is a automatic.
thanks
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Old Mar 19, 2007 | 09:44 AM
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Is your car pretty much stock? If so, don't bother with a 52mm TB for performance purposes.. unless you're just doing it to clean up the engine compartment some with the powdercoated TB.
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Old Mar 19, 2007 | 10:09 AM
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SLPHawk300 i could watch your avatar for days
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Old Mar 19, 2007 | 12:19 PM
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Originally Posted by Javier97Z28
Is your car pretty much stock? If so, don't bother with a 52mm TB for performance purposes.. unless you're just doing it to clean up the engine compartment some with the powdercoated TB.
Mostly stock, I just talked to Matt Blum and he'll take my 48 mm throttle body and powercoat it. Not sure how long I'll have this car so I didn't want to soak a lot more money into it as far as performance.
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Old Mar 19, 2007 | 03:15 PM
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I would leave the TB alone if its more for show than go. That's what I am doing. Nice car 95TAGary.....looked on your website and its a clean ride. I am trying to go down the same route as you are doing with my 97 T/A.

Where did you get the alt.? Did you take it apart and have the housing plated?

Mike
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