We're fully aware that the wheels of Project T-top Coupe's comeback progress are moving glacially, but despite various delays, those wheels have not come to a full stop. Those of you keeping up with the coupe's affairs already know that a brand-new A.R.E. Performance and Machine-built 352ci bullet is now installed in our rare '86 notchback, and the engine's crankshaft and Paxton Novi 2000 supercharger are sporting big and little cog-drive pulleys respectively, for achieving major boost.
Of course, making big boost has never been an issue for the project. However, sustaining the Novi's 21 psi over multiple dyno pulls or dragstrip passes had become a bit of a challenge-even with a 10-rib serpentine belt. While the conversion to cogs remedies belt slippage, we're a lot more excited about another addition to the coupe's performance mix-a water-to-air intercooler system.
In a boosted application, heat is considered the arch enemy of the piston (typically the weakest link in an engine's rotating assembly). We've experienced the truth in this assessment firsthand, as super-hot inlet-air temps and cylinder pressure have reduced the coupe's slugs to melted aluminum on two occasions. Sometimes it really does take three attempts at something to get it right. This type of repetition is unfortunate-and there's no doubt it becomes expensive after a while, as our experiences with catastrophic failure have shown us.
Hopefully it has also shown you the importance of building engines with internal hardware designed for supporting big-time power under severe-duty conditions. As we explained in our last installment on the T-top project (Grand Scheme, Mar. '11, p. 75), loading the engine with JE Pistons and adding a Vortech Mondo water-to-air intercooler are the major changes we've made in this third, and hopefully final, stab at making Couptie a legitimate 1,000hp street 'Stang.
As a general rule of thumb, it makes no difference whether you're using nitrous oxide, water-methanol, alcohol (as fuel), or some other cooling agent. The bottom line is that cold, dense inlet air is a must for ensuring the kind of combustion efficiency that promotes big steam. Vortech's water-to-air intercooler unit definitely will play the co-starring role in lowering our blown beast's air-charge temperature.
You're probably thinking the Igloo chiller itself is the lead component in this setup, but we're actually giving ice the top spot. That's right. Ice cubes are without question the most important ingredients necessary for making water cold enough. While hard-core details on the intercooler are featured in the sidebar (Tough Gig) of the aforementioned article in our March issue, plumbing the 'cooler's water works is our focus in this month's effort.
Transferring ice-cold water from Point A (a 5-gallon aluminum reservoir mounted in the rear-seat area of the coupe) to Point B (the intercooler) is the second-most-important aspect of the Igloo system, and we want to be sure the unit gets plenty of frosty fluid when the blower and engine are at full scream. To do this, we're installing a suite of braided hose and aluminum AN fittings from Earl's Performance Plumbing, and laying everything out so that it doesn't stray too far away from T-top Coupe's street-'Stang persona.
Scott McLaughlin is one of three new guys (our friends Rick Anderson and Ricky Best are the other newbies on Uncle Robin Lawrence's team) at Holley Performance Products. Scott brings an extensive background in high-performance automotive plumbing to the group, which makes him a natural for working with Earl's (a division of Holley) products. Lucky for us, Scott also is a big-time Ford enthusiast. As such, Scott graciously provided his time and assistance with design, product selection, and installation of our project Mustang's intercooler-plumbing bits.
While some liquid-based intercooler/heat-exchanger...
While some liquid-based intercooler/heat-exchanger systems draw fluid either directly from a Mustang’s radiator system or via small reservoirs mounted in a Mustang’s engine compartment, the Mondo ’cooler requires feeding from a larger source...
...We’re using a 5-gallon...
...We’re using a 5-gallon ice-water tank from Dad’s Fabrication, which features an internally mounted, high-volume water pump and a transmission cooler. Typical placement for such units is in a Pony’s hatch or trunk. However, since the coupe’s trunk is packed with a full-on KDezines audio system, we decided to drop the Dad’s piece smack in the middle of the rear-seat area. The interior location for the tank gives us easy access when it’s time to load the cold stuff, check fluid levels, or drain when the ride is over.
Plumbing for this effort requires...
Plumbing for this effort requires taking precise measurements long before ordering any of the hose or fittings that are needed for the job. Our buddy Scott McLaughlin is new to Holley Performance Products and comes to the company as a high-performance-plumbing specialist.