mpro71vette

Will a 1972 LT-1 drop base air filter fit it? I know it fits the holley but not sure on the Demon. :cheers:


[Modified by mpro72vette, 10:37 AM 12/13/2002]

Alwyn678

I am pretty sure that it will........I have a drop base on mine that I ran on the Holley and it fits the demon just fine...I did however have to run a 1/2 inch phenolic spacer in order to clear the rear vacum ports

mpro71vette

Thanks Alwyn678!! How do you like the Demon comparied to the holley?


[Modified by mpro72vette, 11:57 AM 12/13/2002]

Alwyn678

[QUOTE]Thanks Alwyn678!! How do you like the Demon comparied to the holley?


I LOVE THE DEMON.............................Perfor mance from the 650 demon is much better than the Holley in almost every aspect except starting..By the way my drop base is not stock it is from summit.probably similar though

mpro71vette

Thanks, I'm leaning more towards a demon than a holley for my new 383 stroker! :cheers:


[Modified by mpro72vette, 12:07 PM 12/13/2002]

Marks69BB

Yes. I'm running the L88 drop base which is the same base as the LT-1 on my Demon 850dp. Not sure about the 650 you're looking at, but I had to dimple the inside of the vent tube on the pass side to clear the carb's linkage. If you use a spacer, you probably wouldn't have to but I wanted to avoid any possibility of hood clearance issues with the wingnut since I already have a spider crack on the hood from the previous owner! :mad

BTW, previous owner told me after tinkering with the Holley and then getting the Demon, he'd never run a Holley again.


[Modified by Marks69BB, 11:40 AM 12/13/2002]

mpro71vette

Thanks Mark, I am looking at the 750 speed demon. I was going to go with a Holley Streat Avenger but it looks like I will go with the Demon. :cheers:

gkull

If I had it to do over again I would try the 750 Vac Sec Speed Demon. I presently use the chokeless versions of the 750 speed D. and the 825 Race Demon.

The 750 fit under my stock 79 hood on top of a Weiand Excelerator single plane with a drop base 3 X 14 open element K&N filter. It barely touched the hood insulation on the top front of the chrome air cleaner

tshort

Marks69BB - I have that same darned spider crack in the hood from the previous owner. I really hate looking at it :mad . I just took my hood off last night to start the engine swap and I'm so tempted to see if they can match the paint and repaint the hood. Maybe if I can sell my old engine for enough I could use that for repaint.

mpro72vette - I think we are going to have the exact same setup. I've got a Speed Demon 750 vac secondary and I believe we ordered the same engine from AR. Would be interesting if they are the same setup to see how they dyno/time in 1/4.

Corz

best choice i ever made!!! i went from a holley 600 to a Road Demon 625. i noticed about 30 rwhp difference, it really woke up after i did that.

since my carb has an electric choke, i had to modify my air cleaner base to allow clearance..

mpro71vette

Tshort, I would be very interested in seeing how yours goes, we do have the same engine. You will have yours running before me, keep me updated. I just picked my engine up tonight. As soon as I unload it from my truck I will take some pics, it looks great!

tshort

Cool, I can't wait to see the pics. I'll be taking a lot of pictures myself and probably put them in a special section on my website.

lars

We're running BG 750 Speed Demon DPs on all the 427 C2 cars in the CCC (Colorado Corvette Crazies - the ultimate corvette tuning and beer drinking fraternity). We have measured 15hp improvements over properly set up Holleys when we switch to the BG Speed Demons. The height on the BG is the same as the Holley, so it's a direct swap with the air cleaner. We have a bunch of numbers-matching Holleys sitting in boxes here now.... I doubt they'll ever be used again.

mpro71vette

:cool: Thanks everyone, looks like I will be going with the Speed Demon! :D :cheers:


[Modified by mpro72vette, 8:58 PM 12/14/2002]

LAvetteman

Me too!!!! :D :yesnod: