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Old 01-19-2011, 10:36 PM
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best 305 tbi cam

hi i have a 1991 pontiac firebird was wondering what is the best cam that can be drop in a tbi 305 i want it to sound nasty but still run

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Old 01-20-2011, 12:00 AM
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By sounding nasty im sure you mean loepy idle, which isnt gonna cut it in a 305. I have a carbed 305 that sounds pretty good and runs darn good but doesnt have a lopey idle. Having the lope kills 305's. A simple drop in and go cam that Iwould recommend is edlebrocks performer cam. Youll run hard to bout 4000rpm then those swirl port heads will crash like a ton of bricks. Get a 350 in that lite car then youll be really happy
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Old 01-20-2011, 12:17 AM
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ditto

Quote:
Originally Posted by 91firebird
hi i have a 1991 pontiac firebird was wondering what is the best cam that can be drop in a tbi 305 i want it to sound nasty but still run
I agree with AM... In general and especially on a 305 and with probably factory compression "Sound Nasty" and "Still Run" don't really go together.. It's a common misconception..

Matter of fact if we could design that cam we'd be rich in a year.

I was bored
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Old 01-20-2011, 12:44 AM
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As Mentioned above by Muscle, he gave you some good advice. With computer controls and a TBI, awful flowing swirl port heads, there`s not much you can do to help performance much, especially it being a 305.
The cam I recommend for a stock replacement that works very well in a 305 with TBI but does not have a lopey idle is this cam:
http://www.summitracing.com/parts/SLP-CS-274/
Also this cam will keep you from having to add other mods such as adjustable fuel pressure regulator, aftermarket chip and other mods.
Other mods I would do that would help your TBI perform better would be:
Tune it up with a brass terminal cap, spiral core spark plug wires.
Add A K&N Air Filter.
Pack the front wheel bearings with synthetic grease.
Install Royal purple gear lube in the rear diff.
Switch to Synthetic oil.
Open up the exhaust system and add a low restriction muffler such as the Dynomax replacement Turbo muffler that will fit in the stock location.
Add a double roller timing set with the cam install.
Keep in mind, this won`t turn your camaro into a monster, but it will pick up the power by about 20 horses and 40 ft lbs of torque, giving it better power and fuel economy.
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Old 01-20-2011, 04:33 AM
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Now that I think about it more, the above cam I mentioned won`t work with your application as your car came with a roller cam. That somewhat changes things, plus it makes the price go higher.
http://www.summitracing.com/parts/CCA-08-464-8/
This would be the cam I`d recommend as it`s for computer controlled throttle body injected engines with roller cam, however, you would also have to change valve springs, plus you`d need a better computer chip, adjustable fuel pressure regulator with vacuum compensator and new injectors.
In the end you`d spend about $850 and only gain 20 horses, making it not worth it.
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