graemlins/angry.gif as soon as I got mine put it on the bench to fill bowls only to have them leak graemlins/angry.gif tried to tighten everything but she kept leakin. This was a brand new carb!! Took carb apart to find broken plastic bowl washers. They not me over tightend at factory. Talked to tech support graemlins/sad.gif they said they hand assembly with impact tools :eek: went and put washers off my holley on leek stoped. Got car runnin perfect smile.gif 3 days later had off idle stumble,pull carb to find a small piece of casting flash in butterfly transfer slot :mad: graemlins/angry.gif Took whole thing apart blew it out, reasemble carb has been runnin fine since. This was a new carb redface.gif

demons are for car shows holleys are for racing

I disagree a demon is a refined holley with the trick kit nonstick gaskets etc

90% of the people i know that buy demon hate them. thats a fact

Originally posted by chevelleracer:
90% of the people i know that buy demon hate them. thats a fact That's because they don't accept them as something other than a smoothed over holley. I am a holley fan from way back but have respect for BG carbs. Lots of folks here have spent lots of hrs getting past the BG learning curve and love them once they get them dialed in.

I'm not going back looking for the posts but will advise anyone that buys a BG carb to read the directions and following them to a tee when it comes to tuning...

As for what BB485 has run up against it's fairly common to find casting slivers in the bowls and factory settings not up to snuff right out of the box. The site plug gaskets leaking is a firstfor me but it's not surprizing. By the way I've found both Holley and BG carbs with the same problems right out of the box.

I see it this way, the company wants to provide you a great product and spends a lot of R&D time and money making carbs that work. Then on mon morn or fri afternoon the guys on the assembly line are hungover or thinking about the weekend and a lot of QA goes down the tubes... Always give all new carbs a going over, pull the bowls and check the floats dry and look for flotsom. Research how the idle mixture and the rest of the carb is susposed to be set right out of the box and verify everything is. Everything may be fine but if it isn't you just saved yourself a big hastle!! graemlins/beers.gif

nicly put

I didnt have to take my 950HP apart to get it right,the only reason its been apart is to make jet changes in the rear bowl...Never a problem,been on there over 2 years now...Make mine Holley graemlins/thumbsup.gif

I wouldn't consider casting slivers and broken washers part of the tuning process! I feel sorry for the guy with minimum expierance opening his new carb to find this! :mad:

My carb guy gets a lot of new BG carbs to go over. He told me the majority need to be cleaned. Lots of shavings in them. A fair number have holes that don't line up properly. However, he's found new Holleys in the same condition. Just not as many.

Before I went EFI I ran a 1190 Demon on the 540 and street drove it. It ran great....

With the Race Demon the two happiest days of my life were the day I bought it and the day I sold it.

They sure do look pretty, I just couldn't get a good tune - neither could the shop that worked on it after I gave up.

That was an early Demon, I've heard the newer ones are much better.

Thomas

i've had two Holleys on my engine, I spent more time with the hood up than driving it. One was a street avenger, I gave it to guy that owns a shop and he told me that if I ever brought another one of those to him he'd shoot me. Never once had a problem with my Speed Demon. Demons are much better carbs in my opinion. I'll let all the blue hairs have them holleys, that way I'll keep em from ever beating me down the strip.

street avenger?? thats a want to be holley isnt it.

I have no timeslips yet, but the Mighty 750 that I replaced the HP750 with fired right up, ran crisp, but pretty rich at the top. I backed down to 77/80's and reset the curb idle. I've got way better performance all the way from 1100 to 6200 where the soft rev limit kicks in. The Demon was the only thing I could get locally in a pinch and I got a screamin deal on it. The HP750 "was" a good carb before the boneheads that had the car for a year let it sit in a pool of water or some such crap. Don't know if the HP will be a better performer. We just got the trick rebuild kit and the HP is now the latest "shop class" project for our homeschooler, his brother, and me! As for the Demon, no leaks, no cracks, no nuthin but solid performance.

Best,
Mike

My Demon works great! graemlins/thumbsup.gif graemlins/thumbsup.gif graemlins/thumbsup.gif

I put a Road Demon 625 on a 383 stroker and the non-ported vacuum line fills with gas. Called BG several times and did what they recommended which was to put a 4 hole gasket under the carb, go down in jet size (went 4 sizes down), made sure the idle transfer slots were at .020 or less, etc and still have the problem. Pulled it all apart and blew out everything to make sure no flash or anything was blocking any passages. Running 9 inches vacuum at idle and even put 4.5 power valve in it. Anyone have any suggestions?

Originally posted by BB485:
I wouldn't consider casting slivers and broken washers part of the tuning process! I feel sorry for the guy with minimum expierance opening his new carb to find this! :mad: I think anyone taking on a carb swap should be able to loosen 4 bolts and pull a float bowl. I agree we shouldn't have to go through a brand new carb but I bet the guys assembling these carbs are not making $8 - $10 an hr. Repetive assembly line jobs are the most boring work there is. That makes for sloppy work! Combine that with low pay and I'll bet both Holley and BG have very tight QA practices. If they didn't it would be a lot worse.