[yellow1098]

So I hope I can accurately describe this for you guys! I am running a MP Holley terminator setup with an accufab 4150 throttle body …..but am wondering what I can do to modify the linkage so I can use my throttle cable on my northwind intake. With the shaker and drop base it needs to be in a traditional position much lower than this high thing that comes with the accufab. Anyone have any ideas? Thank you!

[Scott65]

More than likely you'll need an air cleaner spacer to at least make up the height difference in the qjet and the accufab. Check the pedal effort at the lowest hole. If its acceptable, you can remove everything above that. Alternatively, you can probably remove that arm, and have another made, keeping the relationship between the holes that link the primary and secondary. The arm appears to have been made with removal in mind.

[Tom Vaught]

I would do what is known as a "Pedal Sweep" by the OEM Engine Calibrators.

a) First you have a "helper" mash the gas pedal of your vehicle to the floor.

b) Then you take the end of the cable where the holes are and line the closest
hole on the throttle cable with the hole in the throttle lever of the throttle body that comes closest to that location but not quite where the gas pedal is putting stress on the
throttle body lever.

c) Now you will know the gas pedal travel and the throttle body are sweep are close.

d) If you have a single hole on the end of the cable you may have to add a extension
to the lever are that moves the attachment for the cable forward or rearward.

e) Check that when you add the Filter lower base that the linkage clears that too.

Some trial and error involved but not that difficult to make it perfect in operation.

Tom V.

[Scott65]

I would try what Tom said. But in the end I think the height of that arm to the air cleaner will dictate your course. Pedals can be bent, aftermarket cables can help with length issues, but if the air cleaner won't sit down, that's that...

[yellow1098]

Thank you guys! I will definitely take a look at those options…..2 things I’m wondering maybe you can address…..

1-what would it effect if I put the throttle body directly on the intake? Which might drop it down to the correct height? What would I lose?

2-I’m also wondering if I could take the whole throttle bracket off and if a traditional 4150 bracket would bolt to it?

[Scott65]

1. Not as much as if it were a carb, but probably some slight loss off horsepower(maybe more than slight, but I don't know) Others may have dyno numbers for that intake with and without a spacer. It's possible you'll need to mill the intake for clearance for the lower section of the linkage arm. The accufab has a slightly narrower footprint than a Holley baseplate. Can't tell for sure from the picture. Drop the spacer out and see if it will sit flat on the intake flange.
2. If you were to weld a set collar of the correct bore size to the Holley arm it could probably be done, maybe. But there's likely to be some geometry issues getting it to sync with the secondaries... Falls into the there's probably a better way category. IMHO

Is the goal a factory appearance? Or just having the shaker functional? I ask because with all the aftermarket stuff available, theoretically you can get really creative. If there's more clearance on the passengers side, you can mount it backwards and use a lokar(or similar) cable and pull it from the front. I'm sure others will have ideas. If I can find it I'll post a link to a custom shaker mount I've seen on LS1 tech. Maybe a custom base would be easier...

[yellow1098]

Great insight on both questions!!!…..the goal is really to just have the throttle cable function properly where it is without having to change the whole setup. Ideally just doing something with the linkage on the throttle body

[Scott65]

One other issue I didn't think about... If you lower the throttle body, it looks like you could end up with the base(air cleaner) interfering with the fuel rails. Again hard to tell from the picture. A straight edge and a tape measure are your friends in this endeavor!

[yellow1098]

What’s crazy here is I can’t figure out if I can just switch out this linkage or not

[Scott65]

Anything is possible. But as mentioned before, it's not gonna be straightforward like putting a Holley arm on. The secondary link isn't the same, the idle screw is in a different place, etc. How about making an arm that bolts to the available holes, but relocates the attachment point for the throttle linkage to where the Holley was? If it works acceptably, you can either cut off the un needed portion of the existing one, or you have a pattern to machine a new one from. It "looks" like it comes off via a roll pin? Hard to tell from the picture.

[yellow1098]

I was suggest to use one of these but I’m not sure how it would work with that linkage

[Scott65]

That would work to mount the cable and return springs.