C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Increase L82 HP

Old 06-11-2019, 06:52 AM
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A set of Dart, Iron Eagle heads will easily fit your budget and make a terrific foundation for future upgrades. JEG's and Summit carry them. The heads alone will get you very close if not there. Combine them with some timing & carburetor adjustments and you'll be there.

Add headers and a true dual exhaust later for another jump in power.

Good luck... GUSTO

Last edited by GUSTO14; 06-11-2019 at 06:55 AM.
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Old 06-11-2019, 10:07 AM
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Seems among better performing iron heads are those from EngineQuest ... YMMV ... aamidwest dot com distributes them.

below is suggestion ... other sizing available

EQ bare pn CH350H

EQ assembled pn CH350HA
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Old 06-11-2019, 12:04 PM
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Originally Posted by joey bunker View Post
sounds like a dam broken record change heads change the heads
ever hear of building something other than just be a part changer
pp head do real good little work low dur cam port and undercut stems on valves bump compression a little shim gasket cut head s nice daily drive
buy more heads more heads dam

This guy is a troll, 4 posts, not contributing anything just bitching...
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Old 06-11-2019, 12:12 PM
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I wouldn't replace the carb. As Lars has noted in his papers and posts, The Q-jet is extremely versatile carb having been mounted on everything from six cylinders to 500 ci Caddy V8's. A great mix of performance and daily drivability. But it will need to be reworked. E.g. I believe your 78 like my 80 has the idle mixture screws plugged to keep you from adjusting them. That's because they were set very lean to lower emissions at idle but cause a horrendous lag when you hit the throttle off idle. Lots of other stuff. But you do need to plan ahead if as the proper set up of the carb will be greatly affected by the compression you end up with.
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Old 06-11-2019, 03:32 PM
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Start by replacing those awful 882 heads.
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