Stromberg linkages now with kickdown!

DSC_8943Got a Chevy or a Ford with three 97s and an auto box? You need our new 9136K Cable Throttle Bracket plus our new Stromberg TwoStep progressive carburetor linkage with auto-trans kickdown capability.

What’s the secret? Our totally new center (primary) carburetor lever, which extends below the throttle shaft center line to pull the kickdown cable at a point set by the owner. The ‘kickdown’ end has a ¼”UNF thread, which accepts the special fixing common to most hot rod aftermarket auto-trans kickdown cable kits.

Linkages with the new kickdown capability simply add a KD suffix to the regular part number, so the 9246PRO 3×2 kit for small block Chevy intakes becomes 9246PRO-KD with kickdown. For small block Ford, choose 9253PRO-KD. Chrome versions are also available. All KD linkages come with two of our Snapback torsion-type throttle return springs, by the way. We have shown the traditional springs in our ‘assembly’ pictures to highlight a typical conversion from a Lokar-equipped 4-barrel carb to three 97s.

To be honest, kickdown is an issue we rarely encounter with flathead Ford applications, but with more hot rodders choosing a 97 tripower for their small block Chevy or Ford, our new ‘kick-down compatible’ progressive linkage, coupled with our new 9136K Cable Throttle Bracket, is a real problem solver. Just one note, if you have one of the more modern auto-transmissions like the 700R4, for example, please seek professional advice about the TV cable requirements. It’s not as simple as with an old-style Turbo 350, for example, as the rate of cable ‘pull’ is as important as the distance pulled. We are looking at special solutions, but they’re not ready right now.

Here’s the full KD range, available from stock. The new center carb lever (Part No: 9096K-KD) is also available separately, complete with swivel and clamping screw. If you need something else, please ask!

9246PRO-KD – 5-1/2″ carb centers – typical small block Chevy 3×2

9251PRO-KD – 4-7/8″ carb centers – Offy Y-block & Cad 3×2

9253PRO-KD – 4-3/4″ carb centers – Edelbrock small block Ford 3×2

All these new Stromberg linkages are on the website under the Linkage & Fuel Delivery menu. Prices are the same as the regular linkages. And as ever, full installation instructions and ‘how-to’ help are also available at the Stromberg Tech Center at www.stromberg-97.com.

New Stromberg bracket for cable throttle – and kickdown!

DSC_8981Here’s a piece we should have launched years ago. Say hi to our new cable throttle bracket (Part No: 9136K), making your Stromberg 97 3×2 tripower set-up even easier to use, particularly on small block Chevy and Ford engines.

You mount it securely between the carburetor and intake manifold (it comes with an extra gasket), and it positions the cable for optimum, bind-free ‘pull’ on the Stromberg premium progressive linkage. There’s a fixing hole for the small extension bracket supplied with most hot rod auto-trans kickdown cable kits. And a separate side arm provides a mount for a traditional return spring – or you can chop it off if you use our Stromberg 9154K torsion return springs.

We have a lot of customers nowadays converting their small block Chevy/Ford from a 4-barrel carb, and many already have Lokar-type throttle and kickdown cables in place. Our new cable bracket, coupled with our new ‘kick-down compatible’ progressive linkages, help make that swap as easy as possible. You can keep all your cables, and even your 4-barrel Lokar® return springs.

While it was principally designed to work with small block Chevy and Ford motors, our new stainless steel bracket is also compatible with most Ford Flathead tripower intake manifolds, (though not with the stock fuel pump). We’re sure you can find a heap of other ways to use it, too. As ever, help with installation is available from the Stromberg Tech Center.

New Stromberg linkages – 6×2 & 4×2

To be honest, it feels like our modular linkage kits for Stromberg 97 carburetors on Edelbrock, Offenhauser and other 4×2 and 6×2 intakes have been in development for years – and in truth they probably have. But now they’re at the warehouse ready to go. And we’re double proud of them. Eight new direct and progressive kits for commonly available 6×2 and 4×2 intakes, plus versatile Trim-to-Fit kits covering the full range of vintage applications.

It goes without saying that they are all developed from scratch, in-house. And it was no easy task. If you want quality linkages (ie. with rod ends), multi-carb linkages are a real challenge as almost every intake differs in carburetor spacing, width and the offset between the two banks. How do we cover all those bases? With tailored solutions for those intakes still available new, like the Offy Pacesetters and the Edelbrock X1 ram, plus Trim-to-Fit options, which cover pretty much everything else out there. Unlike many a linkage, ours come pre-assembled with full instructions – including ‘Trimming to Fit’. Each kit comes in a cool zinc/stainless finish but chrome and polished stainless is available to special order.

So here’s the deal: The direct (non-progressive) linkages are supplied as complete kits with our Snapback return springs.  And the 6×2 progressive kits are modular, so you simply purchase two 3×2 progressive kits from our current range to suit your carb intake spacing, then add the new Back-bar Kit to link both carburetor banks together.

At the heart of the new systems is our unique low-line Back-Bar brackets that won’t over-whelm your shiny new 97s. Precision rolled in stainless steel and reamed for the Oilite self-lubricating bushes, they support the Back-bar shaft at BOTH ENDS for zero flex and positive operation. You simply cannot say that if your Back-bar is supported at one end only. With so much return spring involved, the free end of the shaft flexes like crazy without full support.

All our Back-bar levers are clamped AND PINNED onto the shaft. With ‘3-position’ adjustment, you can alter the leverage and throttle response, too. And our stainless Back-bar end stops prevent lateral movement. We strongly recommend a mechanical link to the pedal with any 4×2 or 6×2 system, so we’re also making our long Back-bar levers available separately as kit 9096K. Complete with swivel, clamping screw and 3/32” roll pin, they can be drilled and pinned to the Back-bar to ensure positive  location and correct alignment with your pedal pull point.

We’re putting all the new kits onto our website this week, so you can check them all out here…Stromberg TwoStep Linkage Kits. And we’ve also posted the full Installation Guide onto the Stromberg Tech Centre right here…TwoStep 4×2 & 6×2 Linkage & Back-bar kits Installation Guide

New Edelbrock small block 3×2 Ford intake for Stromberg 97s

You don’t need to be a hot rodder to know that old is now new – or should that be news – but even the most corporate of performance companies are now opening their eyes to nostalgia overhead valve motors. Edelbrock’s new 5412 3×2 intake for small block Ford is not just a reproduction of an old intake, but a brand new one! Click on the pics for a closer look.

To be fair, Edelbrock and Offenhauser have made 3×2 intakes for small block Chevy available for ever. Add three new 97s and our 9246S or 9246PRO TwoStep linkage and you’re just about ready to go. But if you owned a 260, 289 or a 302 Ford and wanted a cool 3×2 intake, you were pretty much out of luck. Until now, that is, as Edelbrock’s 5412 3×2 Ford intake brings 3×2 looks and power to exactly those engines.

Time for a short math note. We’re often asked whether three 97s provide enough air for a small bock Ford or Chevy. Here’s the deal. Engine size (ci) x max revs divided by 3456 is the maximum air your cylinders can handle if your motor is 100% volumetrically efficient (which is unlikely). So even for the bigger Ford, 302 x 5500/3456 = 480cfm. Most engines are nearer 80% efficient at the top end (so they need just 384cfm), but even if it is 100%, three new 97s can give you 486cfm max. And remember, you only need that much air at high revs. We haven’t dyno’d this intake yet, but the Chevy 3×2 dual plane intakes pretty much flatten out at 5000rpm anyway. Remember, for most of us, it’s more about mid-range torque and drivability.

There’s not a whole bunch else for us to say, except that the 5412 is claimed to be good for 5500rpm and costs just under 400 bucks. Our TwoStep 9253S (direct) and 9253PRO (progressive) linkages bolt straight on. And you can find out more at Stromberg dealer Summit Racing‘s website. As soon as we can get our hands on one, we’ll get better pics and get it on the dyno too.

New Stromberg linkages – small block Ford and more!

It must be linkage week here at Stromberg. New 4-banger linkages at the start of the week, and now, more for the V8. If you’ve just stepped up for the long-awaited new Edelbrock 5412 small block Ford 3×2 intake, or you’re lucky enough to have found a cool old intake for three 97s on your vintage overhead valve engine, check these out. Our new 9253PRO is a 3×2 progressive linkage that places the carbs 4 7/8 inches from carb to carb to fit the new Edelbrock 3×2 intake for small block Ford, plus early Weiand 3×2 intakes too. The new 9251PRO works at 4 7/8 inches apart to fit Offenhauser 3×2 intakes for engines like Ford Y-block and 49-61 Cadillac. If you’re looking for direct linkages for these engines, simply choose our 9245S TwoStep kit and trim the linkage rod to suit.

In addition, our new 9249S 2×2 is a simple direct linkage with swivels for a traditional look, sized for a maximum 7 1/2 inches from carb to carb so it fits the cool intake from Edgy Speed Shop for Dodge/Plymouth 201/218 and 230 Flathead 6-cyl engines. We’re reliably informed it will also fit the vintage Edmunds intake for Plymouth 6 engines (with 7 inch carb spacing).

Moving up in size a little we have the new 9250S and 9250P 2×2 direct linkages (S for swivels, P for premium with rod ends). Both set the carburetors a maximum 8 5/16 inches from carb to carb and are designed specifically for the recently announced Offenhauser 1080 2×2 intake for 1949-63 Cadillac motors. Good news is, they also fit the Eddie Meyer 1932-48 ‘low-rise’ intake for Flathead Ford (at 8 1/4in carb spacing).

Prices are US$49.95 (and UK£26.43 + tax) for the 9249S and 9250S, and US$105.95 (UK£54.13 + tax) for the 9250P. Both 9251PRO and 9253PRO kits are US$175.95 (UK£92.46 + tax).

Designed and manufactured exclusively by Stromberg Carburetor, TwoStep linkage kits combine clean, traditional looks with maximum leverage. They come pre-assembled and install in just two simple steps, without the need for extended throttle shafts. Check out the following features:

    • Die-cast zinc SuperLink lever arms. All other parts stainless steel – even the rod ends and lock nuts.
    • Two new Stromberg ‘Snapback’ throttle return springs, which wrap around the end of the throttle shaft. These chemically blacked, stainless steel torsion springs snap the carburetors shut, yet virtually disappear from view.
    • For a smooth, lightweight look, 2×2 kit swivels are positively fixed by a small e-clip, and the small black set-screws have knurled ends for a strong fix on the stainless rod.
    • P kits have special swivels and bolts, developed to clamp the rod ends tight with a small blind hole in the head. Simply insert a small rod eg, a hex key, to stop the swivels turning while you tighten the lock nuts.
    • Progressive kits have opposite threaded rod ends for easy adjustment. Just spin the rod to adjust for the correct lever angles. The primary lever has three mounting points to change when the secondary carburetors open, and you can pull the front carburetor or push the rear one open to suit individual applications. On the top setting (as supplied), the linkage will start to open the secondary (end) carburetors at around 50% primary (center) carburetor throttle rotation. Lower holes will open the secondaries sooner.
    • Every Stromberg TwoStep linkage kit comes with full instructions, and further help with selection, installation and tuning is available at our Tech Center.