38 DGAS carb

[manoa matt]

I Just found a good deal on a 38 DGAS, Two barrel synchronous carburator with a water activated choke.

Is anybody running around with one of these? I know the 38 ADL is better since its progressive, but any thoughts on the matter are welcome.

[mbouse]

check with RaceyDave... thought he was using that thang.

[lanciahf]

Dave has a 36 ADL, great carb!

I think SoCal Mark has run 38DGAS.

[So Cal Mark]

I've put two of those on, but the dges model with electric choke. It's best with a performance motor by far. There is a short learning curve on how to best drive the car. You certainly can't put the pedal to the floor from idle (why you would want to is beyond me), you have to slightly ease into it since both barrels open simultaneously. But, you can accelerate as hard as possible without flooring it from an idle anyway. And the top end is quite amazing if you get it jetted correctly. I'd go for it

[manoa matt]

That's pretty much what I thought regarding starting off the line and gradually easing into it. I think I even have a way(s) to make it progressive.

My problem know is that I have to many carbs and only one car to put them on. Currently I have a 32ADFA on my stock 1800, and a spare 32ADFA for parts. I also have a set of dual 40mm Solex P11-6 carbs(IDF copies), and a spare set for parts. A set of Weber dual 40mm DCNF carbs, and a set of Weber dual 44mm IDF's.

My plan is to install the 40mm Solexes on my stock 1800 untill I get my performance motor built, then install the 44 IDF's or a single 40 DCNF on the performance motor.

Do I realy need another carb? If anyone is interested in the 38DGAS the seller is asking $75, I'm not only a "good salesman" but I'm a better negotiatior/haggler.

Also if anyone is looking for a particular carb let me know and I'll keep my eyes out. On any one day on Hawaii Craigslist there are several 32/36 carbs, a few 40mm IDF's and a few 44mm IDF's And usually they are very reasonable prices. The reason.. tons of VW's and Toyota's and no emissions regs.

Let me know and I'll go take a look for you. matt.scarton@gmail.com

[So Cal Mark]

don't get me wrong, you can still accelerate really hard with that carb, you just can't go wide open from an idle. Unless you're into breaking cars, I wouldn't recommend driving that way

[azygoustoyou]

Guys,
What would be the ideal carb for my 1800 stock engine I have the stock 32 on my 78.

[So Cal Mark]

depending on how you drive, I'd recommend a 32/36dfev

[azygoustoyou]

Well, I'm into speed. Use to race motorcycles. Would do anything as long as I don't get caught. But then again. I only have a stock engine. Just something that would purr pretty good. I guess I need the 32/36DFEV Matt.

[jcp010]

Hey Mark, What type of engine setup have you run the 38 DGES carb on? I have used this carb once before on a stock engine and it was no good. I plan on running it again only this time I have a 2000 with an 1800 head, IAP auto cross cams, 1800 intake manifold and the factory 4:2:1 headers... I feel like I will have a bit more luck with it this time

[So Cal Mark]

I put one on a stock 1800 and the customer didn't like it. Learning the new driving style didn't suit him. Spiderrey has one on his built 2L. We have another one on a mild 2L. It has an 1800 head with big valves, our street cams and our header/exhaust. That car rocks, it's the most fun Spider I've driven and the top end is incredible. That car will pull in 5th gear all the way to the redline.

[jcp010]

I am torn between using a 38 dges or dual carbs sine I already have an original fiat waffle top manifold... I will probably be doing alot of around town driving with it but I would also like to get into auto crossing... not to mention a dual carb setup is just plain cool!... Sounds cool, looks cool, and the car goes like a bat out of hell... Have you had any experience with dual carbs on a similar engine to what you have installed the 38 dges? Big diiference in performance?

[So Cal Mark]

no we haven't put duals on a similar setup, but we will be doing that in the near future. We're in the process of building new dual IDF manifolds. The first one should be done within a week.

[baltobernie]

Hey Mark, What type of engine setup have you run the 38 DGES carb on? I have used this carb once before on a stock engine and it was no good. I plan on running it again only this time I have a 2000 with an 1800 head, IAP auto cross cams, 1800 intake manifold and the factory 4:2:1 headers... I feel like I will have a bit more luck with it this time

The numbers are in:

125 HP with a decent idle, good throttle response, a nice flat torque curve, etc. The last (and final!) tweak was adjustable timing gears from Jason Miller. Turns out I was only 1-2° out on one side, but 8-9° on the other. This was enough to wreck the low end and cost power 10% across the board. I guess my advice here is to plan on incorporating the time and expense of "dialing in" the cams when doing a performance rebuild.

Specs:

1792cc
10:1 Persan pistons from Vick, assembly balanced to 2g.
1800 head, stock valves, de-shrouding and smoothing per GC video
single-plane 1800 intake, port matched
one 38DGS, 65 idles, 150 mains, 200 airs, stock air cleaner, K&N element
IAP p/n 92400 cams, 40/80 - 80/40, 0.016", cams set to IAP specs using Millers Mule adjustable gears
single-point distributor, Pertronix module, centrifugal advance, recurved by Advanced Distributors, Bosch blue coil, Champion N6Y @ 0.024"
Ceramic-coated exhaust manifold 4-2 cast iron into 2-1 secondary pipes - (standard 1800) - custom 1.75" pipe back to rear-mount Flowmaster p/n 952060
ignition timing optimized on dyno; I don't have a front cover, but it looks like approximately 10° BTDC. I can put on a cover and use a dial-back light if anyone's interested

102 RWHP @ 5600 RPM, 104 FtLbs @ 4200 RPM

With more carburetor and exhaust, it is conceivable that this curve would keep climbing from 5200, resulting in approximately 110 RWHP (140 SAE net). Power beyond that would probably take a bigger cam and make for a more challenging daily drive.

(dyno printout in "New Head" thread, this Subject)

[pope]

Bernie,
On my 80 FI., the books says that the engine has a HP rating, SAE net at RPM of 102@5500. Would that make the rwhp around 85ish?
110ft.lbs. @ 3000 rpms
How do your numbers compare to the 2.0 FI numbers above. I am trying to learn about dyno testing and what the results would produce. Thanks for any info.