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Topic: L82 Intake Manifold: Better Than The L48?

in Forum: C3 Engines

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L82 Intake Manifold: Better Than The L48? (1/13)
11/20/06 1:11pm

SFVette
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I know that the L82 intake manifold is aluminum and the L48 is cast iron.

But other than the weight advantage, does the L82 intake manifold offer any other performance benefits? Would it be worth swapping over on an L48 engine?

Also: is the Edelbrock Performer manifold significantly better than the L82 in terms of design/performance?

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L82 Intake Manifold: Better Than The L48? (2/13)
11/20/06 4:12pm

Ron 78

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I put a performer on my L48,it did make a difference,I dont know about the L82 manifold,I would say yes ,30 years newer techknowledgy would have to be an improvement Approve

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L82 Intake Manifold: Better Than The L48? (3/13)
11/20/06 5:16pm

Lynne73
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Easton, PA - USA

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I to put the Performer on my 73 L48 it did wake the motor up! Then time it the vacuum way like Ben says, it really brings your motor alive!.

Dave

L82 Intake Manifold: Better Than The L48? (4/13)
11/20/06 6:56pm

Gunslinger
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I have an Edelbrock Performer on my '78 L82 and it definitely ran better. At the same time I had the Quadrajet rebuilt and removed the EGR and the last of the emissions control accessories, so it may have been a combination of things leading to the improvement.

L82 Intake Manifold: Better Than The L48? (5/13)
11/20/06 8:21pm

Adams' Apple

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The only difference in the L82 intake compared to the L48 is the material.

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L82 Intake Manifold: Better Than The L48? (6/13)
11/23/06 5:25pm

kstyer

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Yep, the stock manifold are the same performance. But the aftermarket replacements can make a lot of difference. It's all in the flow paths.

L82 Intake Manifold: Better Than The L48? (7/13)
11/23/06 5:51pm

SFVette
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Thanks, everyone, for your answers. It's just what I needed to know.

L82 Intake Manifold: Better Than The L48? (8/13)
11/25/06 8:01pm

timgman
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So a new carb and intake would give me say.......... 20 hp?
perhaps?

timgman2006-11-25 20:02:18

L82 Intake Manifold: Better Than The L48? (9/13)
11/25/06 8:26pm

greypoupon69

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I put the Edelbrock Performer on my L46 (kept the original intake). Also, I stuck an Edelbrock Carb 600 (kept my original Q-jet) on top of that for a little more fun. I can feel more hp, but have not put it on a dyno yet. Another positive side to the changes are 20mpg. Big%20smile

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L82 Intake Manifold: Better Than The L48? (10/13)
11/25/06 8:46pm

timgman
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So that's apretty good combo eh' ?
edelbrock performer w a edelbrock 600 cfm carb?
any other ideas?
I'd kill for a few more HP...bonus if on re-useable parts for a build-up...
I'd stack my numbers matching engine under a bench or on a stand.. but I really would LOVE to get into the 350 hp range....

timgman2006-11-25 21:03:55

L82 Intake Manifold: Better Than The L48? (11/13)
11/29/06 8:07am

mikeee
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Oviedo, FL - USA

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Whats the consensus about putting a rebuilt original Q-jet on an Edelbrock performer manifold?( Stock replacement dist. and mild cam,auto trans,no emmisions devices)Does a performer intake bolt up to vortec heads or do I need to look at another intake...350,former L48

L82 Intake Manifold: Better Than The L48? (12/13)
11/29/06 9:42am

Sarge81

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[QUOTE=mikeee]Does a performer intake bolt up to vortec heads or do I need to look at another intake...350,former L48[/QUOTE]

No, the bolt pattern and taller intake ports on L31 Vortec heads won't work.

They do offer Vortec heads that are drilled and tapped for both bolt patterns but the intake ports on the old style intake aren't as tall as the openings on the head. So you won't get the full benefit of using a set of Vortecs IMO.

You'll have to use a Edelbrock Vortec Performer manifold #EDL-2116 or GMPP #12496820.

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L82 Intake Manifold: Better Than The L48? (13/13)
11/29/06 3:25pm

Chips58
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Just a word of warning if anyone is thinking of putting an Edelbrock performer on with a 600 Holley with vacuum secondaries. You will need a 1/16" spacer between the manifold and carb so the secondaries vacuum operating quadrant will clear the EGR blanking plate on the manifold. Otherwise your secondaries will never open.

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