Demon / Edelbrock tri-power

Do any of you have the Demon / Edelbrock tri-pwer set up that Speedway sells for sbc? I installed it and between myself and a local speed shop, we can't get it running right. The block is a new GM long block 350, the cylinders have good and even compression but it drops cylinders (primarily #7). It puts out 3 times the hydrocarbons on one side of the block. Obviously it's a distribution problem and of course neither Barry Grant nor Edelbrock will own up. One of Grants techs said to switch to an Offenhauser manifold, then later denied saying it. I do not want to go back to a 4 bbl even though it ran fine with it.

 

did you change the cam? Can you get any kind of vacuum reading? You should be able to plate of the outer carbs and get it running on the center carb. If the outer carbs are like the GM set ups, they should NOT have idle circuits. Make sure the outer carbs are leaking vacuum since they don't have idle circuits. Too much air from the outer carbs will make it tough to get idling.

 

Yeah, the outer carbs were removed and plated. It has a stock factory cam. I don't know if the speed shop got a vacuum reading. That's another thing, they sell it specifically for a sbc but don't provide any vacuum ports.

 

Stock cam should have plenty of vacuum to **** fuel for idle. I fixed my post below - the outer carbs should not have idle circuits on a factory type set up. Do yours?

 

have you changed or cleaned your plugs really well since you have been screwing with it?

 

No they don't.

 

Yeah, in fact I had new plugs in it and the speed shop put another set of new ones in it. This thing is driving me crazy. Starting to think that it's a bad primary carb.

 

#7 only hard to believe ck for vacuum leak,ck compression.

 

Actually #7 is the most frequent. Drops others randomly too

 

Take off the air cleaner and see if it is leaking fuel at idle out the left side inside the carb when running. How much fuel pressure are you running?

 

Did you run the system before you "Plated" the secondaries? If so, what did it run like.
Why not take the plates off and try the setup....................it does have progressive linkage right?
Trying to make a tripower setup run without the secondary carbs is a **** shoot, they were never designed to be run on just one carb!

IMHO

 

I would second that. I have had two Demons and had bad luck with both. One was a Road Demon that never worked right and now sits on a shelf. The other was a Six-Shooter that had so many problems, it got returned.

Searching the web you will come across people that have had luck like mine with BG, and there are others that swear by the products, but there are enough posts out there to confirm that a number of them get shipped with manufacturing crud gumming up the works.

 

A tri power set up is just a normal 2 barrel center carb with two dumper outer carbs. It should run fine on just the center carb. It should act just like any other engine with a 2 barrel carb.

 

Edelbrocks manifolds seem to have a problem with sealing. The one on my '32 took 3 tries to get it to seal. No problem with the Offenhauser. As for the Demons, my buddy got a six-shooter from BG and has nothing but problems. An earlier post about BG carbs got them to contact him. They rebuilt the carbs and they ran fine for a few weeks. Then problems started. He now runs a single four barrel.

 

To answer some of the questions, I don't know what fuel pressure it's putting out, but it has a new fuel pump and the speed shop says that delivery to carb is fine. Also, the secondaries were plated after it wouldn't run well with all carbs in place.
Right now I want to send the whole kit back to Speedway and look for a different tri-power set up. Thanks for all the input!

 

I am about to take my tripower set up off and it runs great - PM me and we can talk. It's a offy with rochesters

 

The trash issue was taken care of several years ago so that would not be the case here and the Demon 98's have almost been completely trouble free. Out of the hundreds we have sold there have been less then 10 returned for warranty and several of those had been messed with by the customer.

 

I won't get into it on here but there is quite a bit more to this story then you have posted. I have spoken to you as well as most everyone else here and there have been little answers given to our questions and much argument and lack of cooperation.

Bottom line.... if you feel there is a carburetor problem you are more then welcome to send the carburetors back to us and we will inspect them and run them on the flow bench.If you want to pm me I will give you our shipper number where it will not cost you a dime .

 

It was early last year that the Road Demon was purchased, and within a few months I purchased the Six-Shooter.

Since "Tech @ BG" is responding to this, I will add that no emails directed to BG tech dept. were replied to. The only remedy was through Jeg's where I purchased the kit.

 

I call bs as I personally answer them each day throughout the week even when I am out of town or on vacation. I even answered them whe I was laid up in the hospital for a week.



Thats the problem sometimes with forums is guys like to tell the part of the story that makes them look best.

 

I have run a Race Demon on my sbc in my 41 for over 4 years now with great results. The demon carburetors are a little different in the way they are fine tuned especially with radical cams such as the one I am running. I believe they all come with a CD on how to set them, mine came with a vcr tape (like I said i've had it a while) I tried to dial it in and had trouble untill I watched the tape, followed the instructions and now the car fires right up,smokes the tires, and has no flat spots....I love it and will by another.

 

Funny, BS is what I was calling when I was trying to get help!

How the hell would that make me look "the best"? If you want the "whole" story, I'll, get into little details like poor packaging to the point of RTV being punctured and smeared over a portion of the parts, foam packing in the carb throats (from holes in the protective plastic bag), and buffer rouge all over the air cleaner tops that had scratches/nicks/pits all over them. If you want me to air out all of the little details that made my experiences with BG so wonderful, I am happy to do it.

I answered the question as fairly, honestly and objectively as possible. I even implied that I might be in the minority.

 

I love my Demon daily driver for 3 years, I think I cleaned the air filter once ? Have not purchased there tri but was considering it I hope you get it worked out, but as already stated I would look for a vacuum leak

 

Well, bottom line so far is that BG says no refunds, but send it in and we'll check it out & rebuild if necessary.

The truck has been at my speed shop since Feb 1st. I have a ton-o-$ in trouble-shooting labor and missed two shows that I paid for in advance.
Although it's BG's responsibility to "make it right", their customer service was way less than satisfactory.

On the other hand, because of BG's way of doing business, Brandon at Speedway took ownership, read all of this thread, called my speed shop, and is going to immediately send a new primary carb directly to my speed shop.

Brandon said that after brain-storming with my speed shop, it appears that only half the carb is functioning. Hopefully this will fix the problem, but I'll never deal with BG again.

 

You mean the whole story on the Road Demon where your tank was full of old gas and water and it didn't run until you flushed and replaced the gas and put a different carb? That is searchable on here.

Or how about the rest of the story how the Six Shooter was damaged in shipping from Jegs to you and you demanded nothing short of a refund?

Btw Mike... I went back and searched our email server [I don't delete anything] and the only incoming email I show getting from you was prior to purchase and it was responded to unless you used a different email. I will be glad to look further though as I know for a fact we take great pride in quick returns on the mail and phone messages.

To my knowledge we have never refused a legitimate warranty claim and have even fixed/repaired many times well out of warranty if there was proven to be a defect. That is searchable as well here and on many forums.

If your Road Demon still appears new we will be glad to look at it on the flow bench to rule out anything that may have been caused on our end but water and bad gas can gumm things up in a hurry, I've had it happen on my own cars. Offer stands.

 

Call bs all you want. My first call was faced with a confrontational at***ude and my second call went unreturned.

 

No you talked with me and several guys several times and the first call my tech wanted you to check some things so he could get a base line and you just wanted to argue with him . When you called back in you still hadn't checked what he asked and insisted that was not the problem .You are calling us for help but don't want to check what we ask for. Sometimes you just can't help everybody.

 

Thanks, Keep in mind the poster did not buy our complete system as it is a kit pieced together with parts from different suppliers only using our carbs. Our tri-power stuff comes in several versions and there are 2 different intake styles both of which we manufacture.

 

I can't believe this! You are not helping your company one bit with this dialog. No, my speed shop talked to you first. The I called and I was told to get that info which I did from my speed shop. When I called back to tell you or your tech this info, my call was not returned.

End of story. I'm done. I won't argue with a company whose reputation is poor customer service.

 

No... I am simply posting the truth and those reading can come to their own conclusion based on what has been posted by both parties.

You were made the offer in the very beginning to send the carbs back to have them checked but refused to much as you have in this thread. MY offer still stands if the carb Speedway sends you out does not correct the problem.