Trying to build up 92 305 caprice. - Chevy Impala SS Forum
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post #1 of 20 (permalink) Old 03-03-2014, 11:10 AM Thread Starter
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Trying to build up 92 305 caprice.

Hi, I currently have a 92 caprice classic with only 52000 original miles on it. I figured there is no sense in ripping this motor out and replacing it with a 350 or anything bigger right off the rip. So far ive put in a chip and a thrush exhaust. Im looking to see if I can put vortec heads on it. A new cam, long tube headers, a performance intake and throttle body. As well as a posi rear end and a better ignition system. I will be trying to make a cold air intake as well. I would like to switch to electric fans too. Any input and advice would be appreciated thank you.

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post #2 of 20 (permalink) Old 03-03-2014, 11:18 AM
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Trying to build up 92 305 caprice.

Leave the motor be. Electric fans are a good idea. As are changing the rear gear ratio while installing a quality posi,along with a decent 9.5" torque converter.

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post #3 of 20 (permalink) Old 03-03-2014, 11:19 AM Thread Starter
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Is there anything else I can do to get more power?

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post #4 of 20 (permalink) Old 03-03-2014, 11:32 AM
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Trying to build up 92 305 caprice.

After doing all these things? Yea,but the limitations of the narrow bore are not going to go away. I would encourage you to focus on this motors strong points like strong off-idle torque,excellent mileage (for a V-8),low maintenance expenses,and dependability. All of which are easily ruined by trying to gain a little more power over 5000 rpm at wide open throttle.

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post #5 of 20 (permalink) Old 03-03-2014, 11:38 AM Thread Starter
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I meant is there anything else I could besides what you listed? Ive been trying to find out if the vortec heads would work. And trying to find a intake that would fit.

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post #6 of 20 (permalink) Old 03-03-2014, 11:39 AM Thread Starter
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Im just trying to go fast and make a small sleeper for the time being.

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post #7 of 20 (permalink) Old 03-03-2014, 11:41 AM
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Quote:
Originally Posted by Earl View Post
So far ive put in a chip and a thrush exhaust. Im looking to see if I can put vortec heads on it. A new cam, long tube headers, a performance intake and throttle body. As well as a posi rear end and a better ignition system. I will be trying to make a cold air intake as well. I would like to switch to electric fans too. Any input and advice would be appreciated thank you.
those are all pretty good ideas for a tbi motor, as you already know 305s arnt the best motors to mod. an lt1 cam is a super cheap mod for these motors. with the right supporting mods people have reported 20-30hp increase on l03/l05 motors. check out this board for some ideas: http://www.thirdgen.org/techboard/tbi/

GMPP has a upgraded tbi intake but from what ive heard its very pricey. best bet is to go with a carb intake with a tbi adapter

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post #8 of 20 (permalink) Old 03-03-2014, 11:55 AM
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Trying to build up 92 305 caprice.

It's generally best to build up any car from the back to the front,with the motor being last. Rear-end,trans,and torque converter. Suspension,and brakes next. I suspect you will end up disappointed doing it your way,but who knows.

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post #9 of 20 (permalink) Old 03-03-2014, 11:57 AM Thread Starter
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I found the edlebrock performer intakes but they say they wont fit my motor because of the size of the distributor. Is that just a whole I could drill out to fit?

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post #10 of 20 (permalink) Old 03-03-2014, 11:59 AM
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Quote:
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I found the edlebrock performer intakes but they say they wont fit my motor because of the size of the distributor. Is that just a whole I could drill out to fit?
yes, bbody cars have a larger bore for the distributor to make it easier to install/remove because its so close to the firewall

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