Hello, I'm trying to get some opinions on what to do with my throttle cable for the mini ram install.

When installing it, it is at a weird angle which I have researched and seems like everyone uses it as is due to it not being an issue. What I am concerned about is the cable not being in the track the entire time and rubbing against the guide and wearing out the cable in the long run. On top of that, when pressing the pedal from inside the car you can feel it rubbing against the guide. I assume this is an issue and I tried bending the bracket some but had no luck. I could bend it far enough to help a little bit but it would block the fuel injector connection (which I could ground down the bracket area and fix that) but is not a great solution to me unless I have to.

I figure someone else here has had this issue as well and came up with a solution or everyone is just dealing with it as it's not as big of an issue as I think it is.

I have included some pictures so everyone can see what I am talking about.

This is for a 1989 Corvette and the miniram is fresh out the box as of a couple of days ago.

Sorry, the pictures are so big. I'm not real sure how to make them smaller but they are definitely easy to see.

 

I think I see your problem your cables may be in the wrong points in the bracket. The throttle cable goes in the top slot and stays above injector cover. The transmission detent goes in one of the lower slots.

 

https://www.corvetteforum.com/forums...post1602452692

 

Said another way....

 

Different intake, but related issue description...

https://www.corvetteforum.com/forums...-question.html

 

From the looks of the one thread, some of the people brackets seem to be sitting slightly higher than mine which could relieve some of the issues but not the cable rubbing. I might be able to get some heavy duty heat shrink on the throttle cable to prevent the metal to metal and maybe slot the holes of the bracket to allow it to move up some more and do some quick clearancing.

I also noticed some people have a bracket that goes on the forward left fuel rail bolt that give the cable an angle coming from the top which looks like it would fix my main concern. Does anyone know if that is a piece I should have and maybe TPIS forgot to send it with the new intake? If so that would fix all my issues. It may be worth a phone call for me to make to them

 

I think your first instinct is correct and that cable should not be rubbing against the outer edge of that cam on the throttle linkage. It's worth noting that the older TPI throttle linkage plates did not have that rounded cam, which was introduced in 1989 IIRC. Older TPI throttle plates wouldn't have this issue as the photo shows, and maybe TPIS can provide an alternate cable mounting bracket for your year.

 

Hmmm, good to know info for sure! If I had that style throttle body I wouldn’t have any issues!! I will definitely give them a call monday when they open and see what they say. I’m leaning towards them forgetting to send that extra bracket I’m seeing on some of the peoples intakes.

Also reading the instructions, it talked about 89+, which would indicate the different throttle body styles as you said, using a bracket on the top of the fuel rail.

Looks like the issue was under my nose the whole time possibly. A call on Monday will confirm that though.

It’ll suck if I have to wait a couple extra days for the part, but shouldn’t hinder my progress for getting her running after such a long wait.

 

I bought my Miniram second hand here in the UK and the throttle was setup like below. I guess it's not actually meant to be like that (intake was being used in an Opel Ascona with an SBC swap) but it works nicely enough. I have the other black guide but removed it since I don't have cruise.

Attachment 48336334

 

No problems with my (old style) throttle body. Also no cruise and 4l60e. Actually if memory serves me correctly, this bracket may be the one I used on my previous SuperRam.

 

\

Definitely looks like I will be needing that bracket for proper cable operation. Hopefully, I can get a response Monday as the pictures for the kit shows that bracket but I never received it or the angled fuel line adapters that are also pictured. Surprisingly enough I could even source the fuel adapter locally and had to order one from Summit.

Also, what kind of wire looming is that? I have the crappy stock rectangular one and taped it up to look a bit nicer, but the wires seem a bit short for the fuel rails which is no big deal as it is supported and not just hanging by them. However, mine could look a lot cleaner if using what you have.

I'm starting to wish I had the older throttle body/cable style for ease of use. Would help quite a bit. Also, I like how you did the wiring on yours. It looks very clean going underneath it.

 

Why can’t you swap to the old style throttle body?

 

I have this same setup on my 88, I find the throttle behavior a bit odd, it seems to open too much with just a little push. Not horrible but on a manual car a bit annoying.

 

That behavior that you describe on the throttle is exactly the reason that '89 and later cars have that cam mechanism. I drove an '88 manual for a bit, and once I bought the '89 I immediately felt the difference in the throttle response. The cam sort of makes the gas pedal "roll" on the opening in a progressive fashion rather than a linear pull on the '88 and earlier cars.

 

The wiring loom is just a cheap braided one that slips on, I was trying to tidy it up a bit. I got it from amazon.

I think the throttle cable guide on my car is just a bit of fabricated aluminium, I bent it up a little more when using it on the C4.

My throttle operation is peaky at low openings too, made worse by the 58mm Holley I fitted. I don't think the cable arrangement can impact this though, unless it's the actual bracket on the TB spline which could have more of a cam effect. I used to have a Porsche 924S and a popular mod was to change the throttle guide from the factoy arc shaped one to a circular one to get better throttle response at low openings.

 

Thanks for the info and sorry to butt-in on this thread OP but is this something that can be retrofitted on an 88 and earlier models? My throttle seems to have two positions: 1-foot off the pedal=idle, 2-Even think about touching the pedal and GO!!!

 

If I had one laying around I would, but I do not. It's easier to get TPIS to send me the correct bracket.

Ok, I think I found the same wiring loom. I am probably going to invest in it at some point to clean the engine bay up some more. The cable guide does look fairly easily made, but I do not have access to the tool required to do it at my current location or I'd just make one. Hopefully they can get me one fairly quick.

 

Valid question and still relevant to original thread from OP. In your case, I would recommend you take a look at your Throttle Position Sensor (TPS) for adjustment or correct function. If there is anything up with the adjustment of the TPS and the voltages are off at idle, it can produce the symptom you describe. Voltage should be set at .540 volt at base idle. It should produce a smooth increase in measured voltage through the range of throttle movement to full open. Minimum Air setting can also affect this. Lots of articles on this forum that you can find via Search for this subject. Cheers.

 

Spoke to TPIS a bit ago and they confirmed they forgot to send the upper throttle bracket. They said it would be shipped out by this evening to get it here ASAP

 

Thanks again ajp01, I installed a new TPS recently and have the setting correct. I will look into the Minimum Air setting issue.