Slant Six Forum :: Demon Jr. 525 carb for 225 slant six

Thanks for the responses. My main usage for the car will be occasional trips around town. I live in Phoenix AZ. The smog requirements I believe are similar to California emissions. What about a Weber 2barrel carb? I haven't had much success with Holleys through the years. Too much tinkering is required in my opinion.
If I was to rebuild the 225, what recommendations would you have for pistons, cam etc. to give the car more power for streetlight to streetlight acceleration. I don't have any plans to take it to the raceway or anything like that. Just would like to have some fun around town. I look forward to your responses.
Also, I have a three speed tranny now but would like to switch to an auto. Would a 904 work and what type of modifications would I need to make to the car or crossmember etc.?

Author:	68dodge225charger [ Fri Mar 18, 2005 5:54 am ]
Post subject:	Demon Jr. 525 carb for 225 slant six
Seeking advice with regards to using a Demon Jr. 525 4 barrel carb for my 225. I am required to pass a tailpipe idle and loaded emission test. No visual inspection required. The engine is stock except for a Clifford intake and headers. Any thoughts?

Author:	DANS66DART [ Fri Mar 18, 2005 7:24 am ]
Post subject:
The 525cfm should be waaaay too big unless you've had extensive head work done to take advantage of the increase airflow. Usually a Holley 390cfm works best. Dan

Author:	Dennis Weaver [ Fri Mar 18, 2005 8:27 am ]
Post subject:
Seconded (except for that part about the Holley 390 - Go with a BBD) D/W

Author:	Pierre [ Fri Mar 18, 2005 9:07 am ]
Post subject:
I thought there was someone on here running a carter 500cfm on a stock-ish motor... could be mistaken though.

Author:	Dennis Weaver [ Fri Mar 18, 2005 9:32 am ]
Post subject:
Quote: I thought there was someone on here running a carter 500cfm on a stock-ish motor... could be mistaken though. Even if they were, would that make it work well? D/W

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Demon Jr. 525 carb for 225 slant six https://www.slantsix.org/forum/viewtopic.php?t=12278	Page 1 of 2

Author:	SlantSixDan [ Fri Mar 18, 2005 10:44 am ]
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To invoke some words of wisdom first uttered many years ago by our very own Doctor Dodge: "What are we going to do with this 'full-race street engine'? If the answer is 'Never pass the smog check', you're on the right track.

Author:	DANS66DART [ Fri Mar 18, 2005 11:51 am ]
Post subject:
Dan, you're saying put on a Carter BBD? If so, what size? Just FYI, you're the first one I've ever heard say don't go with the Holley. Dan

Author:	Dennis Weaver [ Fri Mar 18, 2005 1:30 pm ]
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He's not saying it, I am. If a thousand people told you to jump off a cliff, would you do it? D/W

Author:	DANS66DART [ Fri Mar 18, 2005 2:07 pm ]
Post subject:
Quote: He's not saying it, I am. Whoops. My bad. Sorry, Dennis. Quote: If a thousand people told you to jump off a cliff, would you do it? Huh? If you're saying that since a thousand people said put on the Holley I would do it, you're wrong. On 3 different boards, countless people recommended that carb. Like I said, you're the first to disagree. I said something to that effect, and then asked why? If that's not a sign of intelligent research, I don't know what is. I have not purchased a carb as of yet. I was planning on the Holley since that's all anyone has said. However, if you recommend something different, I'd like to compare your reasons with the others and make my own decision. If I screw up, it's only my fault. But to answer your question, no, if a thousand people told me to jump off a cliff, I would not. At least, not without a parachute, bungee cord, jet pack or some other anti-splat device I'm not trying to start an argument, just asked a simple (I thought) question, and I got a strange (I thought) answer. Dan

Author:	SlantSixDan [ Fri Mar 18, 2005 2:08 pm ]
Post subject:
Making a cogent carb recommendation is impossible without knowing how you intend to use this car. Grocery getter, highway flyer, mileage maker, street/strip? And, which state's emission inspection do you need to pass? About all we can do without this info is tell you what won't make you smile.

Author:	SlantSixDan [ Fri Mar 18, 2005 2:15 pm ]
Post subject:
Quote: On 3 different boards, countless people recommended that carb. OK, I'll bite: Where are we finding three different boards where people are knowledgeable enough specifically about slant-6 engines to make a recommendation that's more than just hot air?

Author:	Charrlie_S [ Fri Mar 18, 2005 2:18 pm ]
Post subject:
Dennis, Dan. My problem with the BBD, is in finding a good one. Used is almost impossible, and reman is a crap shoot. What do you guys think about a 350 holly 2bbl or the holley/weber 2bbl. Either on a supper six manifold or a Offie, with the 2bbl plate?

Author:	Dennis Weaver [ Fri Mar 18, 2005 2:28 pm ]
Post subject:
Quote: Usually a Holley 390cfm works best. Dan Quote: I have not purchased a carb as of yet. I was planning on the Holley since that's all anyone has said. What if all the others were just parroting what they heard, just like you did? It's definitely a debatable issue, and I'm not saying the Holley assertion is dead wrong, necessarily (although it is pretty well-known here that I think Holleys are crap for street use ), just that in my opinion, the original poster (68dodge225charger) would be better off sticking to a two barrel if he's not upgrading cam or head. I just think echoing what one hears without the disclaimer that one has not actually themself tried it leads to hype and the BS bandwagon. D/W

Author:	Dennis Weaver [ Fri Mar 18, 2005 2:44 pm ]
Post subject:	Re: Reply to questions
Quote: Thanks for the responses. My main usage for the car will be occasional trips around town. I live in Phoenix AZ. The smog requirements I believe are similar to California emissions. What about a Weber 2barrel carb? I haven't had much success with Holleys through the years. Too much tinkering is required in my opinion. If I was to rebuild the 225, what recommendations would you have for pistons, cam etc. to give the car more power for streetlight to streetlight acceleration. I don't have any plans to take it to the raceway or anything like that. Just would like to have some fun around town. I look forward to your responses. Also, I have a three speed tranny now but would like to switch to an auto. Would a 904 work and what type of modifications would I need to make to the car or crossmember etc.? Do you just gotta have an auto? If not, I'd say go with a 4-speed! (is it a floor shift?) That's one cool car I'm gonna say "stock-ish" pistons, a 252 or 264 cam or similar, mill the head a little and pocket port to remove the big restriction behind the valves (not too difficult). Then, I'd recommend a 4 barrel, if you want, and I say go with a Carter/Edelbrock. The one I run is a 400CFM and hard to find, so let some of the others here who are running the 500 AFB weigh in with their experiences. I think I remember hearing that it works pretty well. D/W

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