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

Would carb be better?

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Old Nov 26, 2010 | 03:30 PM
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Default Would carb be better?

just wondering if i changed to a carb and a rear mount distributer would be better (just performance wise) not a dd. just looking to make the most power n/a as possible. with what i have got. not looking to get bigger heads yet. Im tired of messing with the computer.
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Old Nov 26, 2010 | 03:35 PM
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You will see that this topic WILL BE hotly debated. IMO, a properly setup fuel injection setup is the way to go. Most guys who switch to a carb are in your boat - they lack the diagnostic ability to setup, maintain, and diagnose FI setups.
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Old Nov 26, 2010 | 03:46 PM
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i know you have the bennefit of getting diagnostics from the pcm, but what would really be the pros and cons to the carb. besides computer tuning and fuel miliage. remember im just looking for performance. I just like the thought of no pcm and stupid knock module.
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Old Nov 26, 2010 | 03:47 PM
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would the carb and new intake flow more air than a ported 58mm lt1 intake and 58mm tb?
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Old Nov 26, 2010 | 03:53 PM
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It's not that simple unfortunately. The term "more air" doesn't always translate to "more power." Read this article and draw your own conclusions:

http://www.popularhotrodding.com/eng...ley/index.html
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Old Nov 26, 2010 | 04:14 PM
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I wonder how big of a carb I could go with. or how big of an injector i could go with and make the most power...
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Old Nov 26, 2010 | 06:47 PM
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The price of an aftermarket efi setup is enough to consider a carb but I dont see it being an option unless your ride is an 8000 rpm drag car.
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Old Nov 26, 2010 | 07:59 PM
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Originally Posted by stevecritt
I wonder how big of a carb I could go with. or how big of an injector i could go with and make the most power...
Have it properly dyno tuned.
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Old Nov 26, 2010 | 08:04 PM
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Originally Posted by blk95-z
the price of an aftermarket efi setup is enough to consider a carb but i dont see it being an option unless your ride is an 8000 rpm drag car.
this!!!
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Old Nov 27, 2010 | 07:23 AM
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I would not swap to a carb, if I switched from the opti, I would do the ls1 coil and pcm conversion. It is a little pricey, but imo the best alternative to the opti.
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Old Nov 27, 2010 | 09:00 AM
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what kinda price are we looking at to do the ls1 coil conversion? and I'm assuming the ovbious that i have to get a new dyno tune.
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Old Nov 27, 2010 | 09:25 AM
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Originally Posted by stevecritt
what kinda price are we looking at to do the ls1 coil conversion? and I'm assuming the ovbious that i have to get a new dyno tune.
If you're starting from scratch, it will cost well in excess of $2000, plus tuning.
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Old Nov 27, 2010 | 09:29 AM
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that is F*#$ing rediculous.....
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Old Nov 27, 2010 | 09:30 AM
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You would try and say that is worth the money for the power and reliability you gain??
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Old Nov 27, 2010 | 09:34 AM
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I have no problems with a good tuner and a working Delco opti. The ONLY time I would consider doing the conversion is if my motor exceeded the 7100rpm limit of the factory PCM.
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Old Nov 27, 2010 | 09:37 AM
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oh no. i dont spin over 6500, and I usualy shift at 6100. Ok then lets venture a little off topic. What would be another good upgrade to build more power?
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Old Nov 27, 2010 | 09:42 AM
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Originally Posted by stevecritt
oh no. i dont spin over 6500, and I usualy shift at 6100. Ok then lets venture a little off topic. What would be another good upgrade to build more power?

Well, what are you looking for, dyno numbers or track times?
Who ported your heads?
Is it dyno-tuned? And what did it put down?
Budget?
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Old Nov 27, 2010 | 09:49 AM
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had a local reputible machine shop do it witha 5 angle valve job and 2.02, and 1.6 valves. Have a lt1pcmtuning.com, he tuned it. He had to do somthing right. car really came alive. yea i have a some what of a budget. but I can spend a few k,
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Old Nov 27, 2010 | 01:06 PM
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I think you are leaving alot of power on the table with your heads/cam. www.advancedinduction.com is doing wonders with CNC ported stock castings and custom grinds (see signature). Some of the fastest LT1s in the country are using their stuff. The XFI grinds aren't bad by any means, but for someone looking for every ounce out of their combo, a custom grind is definitely the way to go.
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Old Nov 28, 2010 | 12:38 AM
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^ what he said
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