Frequently Asked Questions

  • Does Fox Lake use a flowbench to actually check what improvements are made?
  • Absolutely, we use a Superflow SF-600 (the industry standard) flowbench that gives accurate flow numbers in our cylinder head development.
  • What actual improvements can I expect to see on my Twisted Wedge heads on my street car?
  • With our Stage 1 porting package on Trick Flow Twisted Wedge heads you can expect to see an honest 30-35 horsepower over an out of the box Twisted Wedge head.
  • Why is the Fox Lake Stage 1 porting so expensive? Jimmy Noname down the road can port my heads for $250.
  • Because of the extensive research and development time Fox Lake invests into our porting programs we are confident that we have the best porting packages available today. There is no guesswork involved, and we don’t just port heads until they “look” like they will flow properly. It is very common to have a ported head that looks great and simply doesn’t work well. Many head porters that do heads by hand can’t even come close to duplicating each port, which leads to very unequal flow numbers. Also, big flow numbers aren’t the only aspect of a good cylinder head port job. By simply grinding away at a port might make big flow numbers, but will not always make horsepower and torque where you actually need it. Our porting packages are tailored to your needs, based on our extensive database of cylinder head flow techniques. Remember, a deal isn’t a deal if the performance on the track isn’t there
  • How big of a camshaft can I really run with my Trick Flow Twisted Wedge heads on my stock shortblock?
  • It is more of a matter of duration and not lift numbers that matter in this situation. When the valve is open, the piston is on its way down so lift numbers aren’t the problem. The duration is the length of time that the valve stays open and is where you more than likely may get into trouble. In theory, you could run a .700″ lift cam and not have piston to valve problems if is has a short duration. Also, you could use a cam with only .400″ lift and if the duration holds the valve open too long into the stroke you would have contact. In our experience, we have used the Trick Flow Stage 2 camshaft with numbers at .544″/.563″ lift and 224/232 duration @ .050″ and have no clearance problems at all on a stock shortblock. Piston to valve clearance should always be checked during assembly, but just try to not to get “hung up” with lift numbers only……there is more to it than that.
  • How long does it take for you to do my heads?
  • Normally, it usually takes between 2-4 weeks to completely port your heads and get them ready to ship. The time of the year plays a big role in this also. This is a seasonal hobby for many, so it is good to try to plan ahead if you can.
  • Can Fox Lake port the head on my Honda?
  • Yes, we do Honda, Subaru, and Mitsubishi 4663 and Evo. Gains of 30 – 100 cfm are common. The more power you make the more the porting will help. Works with All Power Adders
  • Will a Stage 3 ported head help my 13 second car?
  • More than likely, no. In the world of cylinder heads, more is not always better. The larger the port, the higher into the rpm range the power comes and low end and midrange torque suffers.
  • How can I make 500 horsepower with my street car and still be streetable?
  • With most street driven cars a supercharger would be the quickest and easiest solution. With a very mild camshaft, a set of good aftermarket cylinder heads (Trick Flow, Edelbrock, ect.), and a good intake, an otherwise almost completely stock 5.0 Mustang could easily make 500 horsepower if it is tuned properly. A good example of this is Tim Stockwell’s blue coupe featured in our “Readers Rides” section. This car uses a stock shortblock, Fox Lake Stage 1 Trick Flow heads, Fox Lake Stage 1 Trick Flow intake, Trick Flow Stage 2 camshaft, and an ATI Procharger with only 9 psi of boost to go 10.80’s at over 124 with drag radials and pump gas. At 3420 lbs, this car is making 541 horsepower on pump gas! If you choose to go the naturally aspirated route, it may be much more difficult to obtain these numbers and keep it streetable. Much more compression, and camshaft are needed to make this kind of power and streetability will suffer. We know that the key to making horsepower is the combination, so find a proven one and stick to it. Don’t try and re-invent the wheel…..in most cases you are much better off to go with a proven combo that you know for a fact will work.
  • How much power will my stock block handle?
  • Through our years of experience we have found that a realistic horsepower limit of a stock Ford roller type block to be in the 500-550 hp range safely. This is if the engine tune up is correct and the engine does not see detonation. No matter what you do to, or bolt to a stock block they just cannot live under conditions worse than this reliably. We have seen many cars make much more than this with a stock block, but not for long. The main thing is to be realistic with your horsepower goals, many people out there simply don’t understand what a “real” 550 horsepower car is like. A true 550 horsepower in an honest street car is more than the average car’s suspension and driveline will handle in street driving conditions.
  • Can Fox Lake install my new cylinder heads on my car?
  • Unfortunately no, we are a full service machine shop but not an installation facility. We would be happy to try to recommend someone in your area if we can.
  • Why does Fox Lake have a new web address?
  • Fox Lake now has a new web address that is easier to remember. Our old address, www.fox-lake.com was difficult for many people to understand because of the dash in between the words. You can actually use either www.foxlakeracing.com, or www.foxlakepowerproducts.com and they will both bring you right to our new site.
  • What are the major differences between the Trick Flow Street Heat, the Track Heat, and the Twisted Wedge heads?
  • To keep this simple, the Street Heat is the original designed inline valve high port head. The Track Heat and Twisted Wedge heads are basically the same (same exact castings) with the exceptions that the Twisted Wedge heads have smog provisions and valve springs for up to .520″ lift, while the Track Heat heads have no smog provisions and come with springs for up to .600″ lift.
  • What are the major differences between the Trick Flow Street Heat, Track Heat, and “R” intake manifolds?
  • While the Street Heat and Track Heat intake manifolds use the same exact lower, the upper on the Track Heat has runners that are 3″ shorter inside the manifold. While they look identical from the outside, the Track Heat is more suited for forced induction or higher RPM applications and the Street Heat is more suited for idle-5500 RPM applications. The “R” intake is definitely more of an intake for high RPM or large cubic inch motors. The “R” intake is not designed for a 302 cubic inch motor unless it is used with 15+psi boost.
  • Are there differences in Mustang Modular heads?Y
  • es, the ’96-’98 heads are a lower performance head. They can be swapped for the ’99+ Performance Improved heads but it will raise compression 1 point on a ’96-’98 motor. TO do this swap you would need the heads, intake, and related parts.
  • Are ’99+ non-PI heads worth using? You know, the ones off Crown Vic’s?
  • Sure, if we port them they come out exactly like our ported PI castings. They are cast a with smaller ports than the PI heads, but there is enough metal to fully port just like the PI head and they end up the same.
  • Will 4V Cobra heads bolt to my 2V GT motor?
  • Physically yes, but they will require that you use the ’03 Cobra adjusters and related hardware. Don’t forget the intake and related components also along. It’s not an easy swap, but it can be done.
  • I now have a broken piston in my Modular motor, should I just buy a new shortblock?
  • No, not unless you absolutely need to. We offer a piston and rod kit for $1675 that includes forged H-beam rods,¬†DIAMOND forged pistons with valve reliefs, file fit rings, and Federal Mogul bearings. This provides a solid platform to handle 900 horsepower! Send us your broken shortblock and we can machine and assemble this for only $2750 including parts.
  • If I buy ported Modular heads from you do I need to send you my heads as cores?
  • Yes, they are worth $300 pr. provided they are usable cores. For example, a set of Stage 2 heads are $2195 outright, if you send us your old ones they are only $1795.