Reply to "efi"

I want to share a few things I've learned since this thread on 351 Clevelands and the TFS EFI parts from my blog:

1. The Box-R intake appears to be much better suited to a 450 HP+ Cleveland. TFS confirmed to me that the Box-R intake is 12-3/4" tall as delivered and not 12" tall as listed in their 2011 catalog. 5/8" can be milled off the spacer between lower and upper intakes, and 1/4" can be milled off the lower intake. So, you can get the intake down to about 11-7/8" tall. Dan Jones ran a quick simulation of the standard R intakes for me and found that it restricts the power for such an engine.

2. The Track Heat intake for the 351C and Clevor setups is cast the same for both engines. The manifold is then machined to fit the 9.2" deck and different block rail profiles of 351C and 351W blocks. The reason I want to put this out there is that if someone wants to use a 9.2" deck height Windsor block with Cleveland heads, there is an intake that will fit (provided that you get the Clevor intake and have it milled & drilled appropriately). Along the same lines, the EFI lower may be the same thing since there are no coolant crossover provisions for the Clevor setup. If one builds a Clevor, Price Motorsports makes a nifty coolant crossover/thermostat housing specifically for this situation. Does this matter with the aftermarket 351C blocks? I think so, since you can buy a really good Boss 351 block from Ford Racing for cheap in the right deck height. Then, you can still use off-the-shelf headers rather than modifying something to fit the taller deck height of the common Windsor.

3. The Track Heat manifold has injector bosses AND injector fuel rail mounts cast integral. The fuel rails for the EFI lower appear to, with machining, also fit the Track Heat. I haven't confirmed that, but it appears to be TFS's intent.