Guys,
I have a Weber 38/38 on my Volare's 225. What brand/type of fuel pressure regulator do ya'll recommend? I feel a bog when I accelerate.
Thanks!!!
I also like the purple on your slant. The song "Flying Purple Eater" comes to mind.
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| Author: | Wesola78 [ Mon Mar 17, 2014 4:35 pm ] |
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Guys, I have a Weber 38/38 on my Volare's 225. What brand/type of fuel pressure regulator do ya'll recommend? I feel a bog when I accelerate. Thanks!!! I also like the purple on your slant. The song "Flying Purple Eater" comes to mind.
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| Author: | xjarhead [ Mon Mar 17, 2014 6:35 pm ] |
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Holley 12-804 Adjustable Fuel Pressure Regulator, 1-4 PSI I believe this is what their using, at least that's what i will be using for my install. Dave |
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| Author: | Serj22 [ Mon Mar 17, 2014 7:08 pm ] |
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Dave. That's exactly what I'm using. Make sure you don't get the one with a 3 on the end, that one is for 4psi and up. The regulator I got comes set at 2.7 and can be adjusted to 4. Mine is at 4. It bogged quite a bit at 2.7 and 4 seems to be the sweet spot. I mounted mine on an arm I made that hangs 5" in front of the carb and away from the exhaust manifold. |
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| Author: | Serj22 [ Sun May 04, 2014 10:04 pm ] |
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I just thought I'd post an update now that I've been running this carb for a while. So far I am very happy with it. Here's what all 6 plugs looked like when I pulled them today:  I'm pretty sure that being light brown, it's running right about normal, meaning the carb jets that came with it for running on the jeep motor may be adequate I'm assuming. I went and bought a cap, and new plugs, and it really helps at idle, the cap was really cruddy underneath, and the $8.00 price tag for a new one I just couldn't walk away from. I went with NGK (g4? or something like that) because that's what they had at the auto store and I've used them in the past without issue on other cars. |
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| Author: | JR [ Sun May 11, 2014 1:01 pm ] |
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I just installed a new 38/38 on my truck after talking to Serj about his results and after trying out an Eddy 500, Eddy 600, Carter 400 (buick), Holley 390, Holley 500 2bbl, Motorcraft 2150 (this one was the runner up for best carb) I bought a new 38/38 and it is by far the best carb I have run out of the box! My set up is... 69 D100 year round daily driver. 60 over, Clifford 268 cam, mildly ported head, Offy 4bbl, Clifford shorty headers (both headers and intake are matched to the head), GM one wire alt, mini starter, HEI ignition, rebuilt factory OD 4 speed and 3.91 8 3/4 rear. I love this carb! Perfectly smooth idle, pretty easy install (after I sanded down the adapter plates so they were actually flat on both sides) and it has great response. The only down side so far is the air cleaner (ordering the adapter plate so I can run a 14") and am not a big fan of the Lokar pedal I installed but I think I just need to install a tighter return spring and then get used to the new pedal. The only thing that I haven't done yet is install the Holley fuel regulator that I got. The truck runs great and the carb has shown zero signs of flooding or any other issues so I might drive it this week, see how it goes and install it next weekend. I will be getting a 32/36 for my wife's 66 dart after seeing Serjs' and my results, I am sold on these carbs! Thanks for the write up and the info you messaged me Serj! 
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| Author: | Serj22 [ Sun May 11, 2014 2:54 pm ] |
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No problem JR, glad all the info helped someone out. You sure there's no signs of flooding? If you took the air cleaner off and shut down the motor on mine smoke would pool out of it briefly. That might have just been my application, but definitly don't choke it further than 4psi, if you run less you will notice it being boggy and junky feeling. Also on Weber's website they recommend mostly 4psi applications. The air filter is kind of small looking and weird, but it's not bad. The only issue I have is when you take the clamps off a lot and resecure it, the filter starts to lose its shape and look crooked. I think I may eventually run the adapter, the shallow spectre plenum, and run a tube up to the grill behind the battery for fun. Also again, glad I could help, and let me know if anything else you have a question with. -Dave |
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| Author: | Aggressive Ted [ Thu May 29, 2014 4:13 pm ] |
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JR, What kind of mileage are you getting? As good as DadTruck (23 mpg) with his truck? |
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| Author: | JR [ Thu Jul 31, 2014 9:58 pm ] |
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Quote: JR,
HAHAHAHAHA, oh god, I wish! The clifford 268 cam I'm running is killing the mileage (that and it has the aerodynamics of a brick).What kind of mileage are you getting? As good as DadTruck (23 mpg) with his truck? One the freeway I'm getting about 17 and in town sitting in traffic downtown Seattle about 9. I didn't set out to build this one for mileage anyways. the only reason I put in the OD 4 speed was so I didn't go def while driving down the freeway for any longer than an hour. My wifes 66 dart is the reliable gas mileage car. We will be getting a smaller Weber for it and finally get around to installing the Dutras I got from a certain bearded slant six guru pretty soon. |
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| Author: | wjajr [ Fri Aug 01, 2014 6:26 am ] |
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Quote: I didn't set out to build this one for mileage anyways. the only reason I put in the OD 4 speed was so I didn't go def while driving down the freeway for any longer than an hour
Big cam coupled with over drive running below where torque curve levels out adds up to poor fuel economy due to over cam lap disallowing good cylinder fill and exhausting of combustion gasses. I have a big cam in my Dart with oversized valves, 9.5:1 compression, headers, Holley 390 4V, 3.55 gear, and an air/fuel ratio gage. What I discovered the other day when traveling to a car show 50 miles from home on I-95 where the speed limit was recently raised to 70 mph was an interesting air/fuel mixture reading. My car runs at 3000 rpm at 60 mph which is about the highest speed I run at most of the time, and air/ fuel mix reading always runs at the mid rich leaning out to ideal under WOT. That new 70 limit enticed me to run half the trip at 70 to 75 mph; and gage settled in at mid to rich side of ideal the closer rpm got to 3500. Never have I been able to run that car in ideal mixture zone on flat ground with constant throttle opening. After thinking about this for a while I decided two events were taking place that may have contributed to this change. Possibly the secondaries were starting to crack open allowing more air in leaning out mixture, but throttle opening position was no enough to retract secondaries lockout at this small throttle opening. The other possible condition was the engine was turning up fast enough to hit its sweet spot where valve over lap event become efficient moving A/F and exhaust gasses in and out causing a more complete burn. I can say the lower the rpm the richer it runs, this is what I see in intown traffic, and below 2500 rpm operation. Search aggrisiveted for free flowing exhaust solutions with drone free running. |
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