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This is not going to be as easy as I thought

66HertzClone

66HertzClone

Member
I had some time today and decided to see if I was going to have any throttle linkage issues switching from the MassFlo to the Holley HP EFI throttle body. And yes there are problems, the Holley unit is much wider and so wide it doesn't fit between the fuel rails on the Torker II intake I have. See the photos below.......

First thought was it looks like I'm going to have to get a different intake, a search yielded only one MPFI intake that will allow me to use the Holley HP system I have, a $420 unit from Fast. Not sure even if it will work as I don't know the height. After the shock wore off I began to think and may have a simpler solution. If I can have the top rail modified so it would have extensions that would slip over the top of the injectors, looks like an inch would be sufficient, I would have enough clearance for this to work. Any opinions of other solutions? Returning the Holley kit is not possible, I've already begun modifying the haIMG_3038.JPG IMG_3040.JPG IMG_3038.JPG IMG_3040.JPG IMG_3045.JPG IMG_3046.JPG IMG_3043.JPG rness and my son opened all the boxes including the one labeled "if opened this kit is not returnable".
 
I don't suppose anything as simple as a 2" carb spacer could be used. Hood clearance issues I would think.

Alternatively, you could buy a new intake and have the injector bosses drilled out at a slight angle. You would have to then make sure to watch out for VC clearance.

If you wanted to really tear into it you could likely remove the return spring assemblies on the linkage and shorten the shafts and then utilize a standard return spring...

...sorry but I don't see a whole lot of options.
 
Or you could maybe sell me the old set-up and use the funds to pay for the new parts you need.:D
 
A spacer is not an option, there is very little space left above the air filter, little enough that FAST manifold likely would be to tall to use. I looked at that linkage, it might be possible but I'm not sure I'm up to that job. I'm thinking the rail modification is the route I will have to take.

I've already received a PM asking about selling the MassFlo remains, I haven't responded to him yet but, one would need an intake like the one I'm trying to use, a wiring harness as I did modify the original one and it may have been part of the problems I was having. So one would get the Ford AL9 ECU modified by MassFlo with a chip, their throttle body, their Mass Flow air sensors which is a GM style unit they have modified, and the box that converts the GM signal to one the AL9 will understand.
 
B67FSTB said:
even with a dropped base aircleaner ??
Click to expand...
With a 65/66 the hood clearance is very tight when using an aftermarket aluminum manifold. Most times you end up with about a half inch or so of room. Even with a drop base it's tight. One option many use is to get Ron Morris style engine mounts that lower the engine 1/2" to gain a bit of space. Some go so far as to mill the manifold carb mounting surface down a bit just to gain room. It looks like he would need a couple inches to gain the clearance needed vertically.
 
Even with the drop base I would still have a problem.

I'll look at that but not sure I could use those. I have the Cobra Automotive front cross member and the Cobra aluminum pan, things are pretty tight under there now.

The more I think about this the more I'm convinced that having the rails modified is the way out. There are bungs available for installing injectors in manifolds, so I purchase a set of 8, have a machine shop drill the holes in the rails large enough to accept the bungs. Then have them pressed in and TIG them to seal, or tread them and the holes in the rails. I would need the brackets extended or have longer brackets fabricated to hold the rails in place.

Rail Retainer.JPG
 
A big sigh of relief, I posted my problem on the Holley EFI forum and Danny the tech guru asked why wasn't I using the MassFlo throttle body. I did not know that was even possible but it is. I just need to not use the harness leads of the IAC motor and connect it to signal in leads , then do some pin mapping and enter the IAC type. The throttle position sensor can be connected and self program.

I'm really liking this Holley stuff.
 
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