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Old 05-24-2011, 08:11 AM   #1
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Default Best heads?

hey i was wondering what are the best heads for a 93 lt1
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Old 05-24-2011, 09:02 AM   #2
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depends what are you wanting to do with the car ?
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Old 05-24-2011, 09:09 AM   #3
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im doing a 383 stroker
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Old 05-24-2011, 09:11 AM   #4
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Also, depends on how much you want to spend. If money is no object buy some AFR's and send them out to be ported.
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Old 05-24-2011, 09:18 AM   #5
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well the shop that is building it got some patroit heads for it and said they finished and they called me back and telling me the heads are not goin work like they said would and now want me to get another 350(vortex os some bs) and put everything in it so im and the motor has been with them for 4 months and they have just been sitting on it so im goin to pull it out and finish it my self.
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Old 05-24-2011, 09:20 AM   #6
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The AFR 227's are the best flowing head on the market untouched, however they are built for more of a supercharged/turbo charged application. If your just doing a 383 naturally aspirated you could easily get away with AFR 210's, auto or manual car ?
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Old 05-24-2011, 09:21 AM   #7
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its auto and i was planing on doin a 150 shot
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Old 05-24-2011, 09:26 AM   #8
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Yeah AFR 210's would be just fine for your application, although to get anything from them you really need a bigger cam, I would suggest something with a split duration for Nitrous.
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Old 05-24-2011, 09:30 AM   #9
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Here is trick flows offering, a little small but says it'll make 430hp

Trick Flow® 430 HP GenX® Top-End Engine Kits for GM LT1 - SummitRacing.com
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Old 05-24-2011, 09:34 AM   #10
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Here is the link to the AFR 210's
AFR 210cc SBC LT1/LT4 Eliminator Comp heads PN 1101 | eBay
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Old 05-24-2011, 12:42 PM   #11
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is that trick flow kit good do i need to get the heads ports and thanks for all the help
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Old 05-24-2011, 01:54 PM   #12
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The trick flow kit is fine as long as 430hp at the flywheel is enough for you, If you want anymore than that you will need a better head. And no you don't have to port anything you buy.
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Old 05-24-2011, 02:50 PM   #13
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ok thanks for all the help again and be fore i order it the 150 shot is safe on that kit

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Old 05-24-2011, 04:46 PM   #14
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id be more worried about your bottom end. dont want to spin a bearing or anything
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Old 05-24-2011, 05:44 PM   #15
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The Patriot heads were designed for standard old style small block chevy cooling system
the LT1 has reverse flow cooling.

LT1 History

Early heads Lt1 Casting 374 last 3 digits have more meat for porting used 92-95

Later LT1 Heads have slightly better flowing exhaust ports castings 561 harder to locate.

The 96-97 Late model LT1 heads also flow slightly better than the early ones casting 648.

The cast Iron 96 Impalla SS heads were the best flowing LT1 Heads flow approximately 20cfm better than the aluminum heads and weigh 40lbs more per pair.

For racing heres some comparisons of head flow rates:

Total Engine Airflow & Trick Flow LT1 Cylinder Heads | GM High-Tech Performance Magazine Article at Automotive.com

Last edited by Viper; 02-14-2013 at 09:49 PM.
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