Tech

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Spaced Out: How to Choose a Carburetor Spacer

[portfolio_slideshow id=35028] Carburetor spacers have two main tasks: insulate the carburetor from engine heat to keep the incoming air and fuel cooler, and act as a tuning aid to produce more power. There are many carb spacer options to accomplish those goals–wood, aluminum, and more–so the the question becomes: Which carb spacer is best for

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Mailbag: How to Improve Highway Mileage in a Vintage Hot Rod

You’ve got questions. We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums.  D.L. Kansas City, KS Q: My trusty 1936 Plymouth 4-door has a .060-inch over, 350 Chevy with an RV cam and a Holley 4-barrel. I’m also running a Powerglide transmission and a stock 1980 Cutlass 10-bolt rear end. Should I change the

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Ask Away with Jeff Smith: Inside GM’s New 90-Degree V6 Engine

In the ‘80s, GM used a 4.3L 90-degree V6 in many different cars. I know that this engine is basically a small-block Chevy with two cylinders removed. This got me to wondering why they haven’t built a 90-degree V6 using the 5.3L or 6.0L LS engines? M.S. Jeff Smith: This is a great “what if”

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Ignition Basics: Analog vs. Digital Circuitry and What it Means

When the average hot rodder ponders a new ignition system, it’s not unusual to migrate toward the most common or publicized brands. While it’s understandable to focus on familiar brand names, there are more choices out there than you think. One of those lesser known options is Crane Cams.  Believe it or not, the cam experts

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Ask Away with Jeff Smith: Fuel Volume vs. Fuel Pressure & How They Relate

I’m considering buying one of those self-learning TBI fuel injection systems. I’ve heard that the fuel delivery system is the most important part of the installation so I’ve been reading up on electric fuel pumps. I’ve noticed that companies rate their pumps at different power levels based on how they will be used. Why does

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A Solid Connection: How to Pick the Best Bushings for Your Vehicle

[portfolio_slideshow id=34590] So you want to buy a set of control arms. Okay, easy enough. Do you want tubular or boxed arms? Picking a design style is fairly straightforward. Are you going to race the car? It’s a legit question. How about color? These questions are getting simpler. What bushing do you need? …um. Chances

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Video: Exhaust X-Pipes vs. H-Pipes, Part 2

If you missed it, Part 1 of the X-pipes vs. H-pipes Summit Racing Quick Flicks video series focused on the basic differences between the two designs and how to choose between them. It taught you about exhaust scavenging and how it affects your exhaust performance. In Part 2, a member of Summit Racing‘s tech department

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Mailbag: Diagnosing Mopar Ignition Problems

You’ve got questions. We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re tracking down some ignition box issues in a 1974 Plymouth Duster. W.S. Vienna, IL Q: Our 1974 Plymouth Duster has a 318 with an automatic transmission. The car is mechanically sound, but it will not run with the foreign-made ignition

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