Carb recommendation
#2357798
08/21/17 09:14 PM
08/21/17 09:14 PM
|
Joined: Nov 2010
Posts: 105 Ontario, Canada
D149
OP
member
|
OP
member
Joined: Nov 2010
Posts: 105
Ontario, Canada
|
1969 Road Runner 4 speed 3.91 gears, 440, 10.5:1 CR, Stealth aluminum heads, Comp cams XE284 cam, Edelbrock RPM intake, TTi 1 7/8" headers/ 3" exhaust. Mostly street driven and the occasional trip down the 1/4. The engine made 501HP/514TQ on the dyno with the engine shops dyno carb (not sure what it was). I currently have FAST EZ EFI 1.0 on the car, but the fuel pump died on the way home from a car show yesterday. The EZ doesn't work great with the cam in the engine, and I'm not sure I want to upgrade to a multipoint EFI system.
So... what carb do you recommend? I was thinking around a 750-850CFM double pumper with annular boosters, but not sure who makes the best carb.
Thanks in advance. Dave
1968 Valiant Signet 4dr. 273 4spd 1969 Road Runner 383 4spd 1969 Barracuda 318 auto 1970 Dart Swinger 340 4spd 1975 Cordoba 400-4bbl 1988 Caravelle 318 Auto 1999 Dakota R/T 2000 Viper GTS 2001 Ram 2500 Diesel 6spd 2018 Dodge Challenger GT (Winter beater!)
|
|
|
Re: Carb recommendation
[Re: D149]
#2357815
08/21/17 09:46 PM
08/21/17 09:46 PM
|
Joined: Jan 2003
Posts: 12,171 Benton, IL.
DaveRS23
Special needs idiot
|
Special needs idiot
Joined: Jan 2003
Posts: 12,171
Benton, IL.
|
The double pumpers are good carbs and would be a good choice for a 4 speed big block car. The only draw back is that most (maybe all) of them are calibrated for the track and therefore are quite a bit rich for street driving.
After getting the suggestions here, call a few of the better carb builders and get their recommendations.
Master, again and still
|
|
|
Re: Carb recommendation
[Re: AndyF]
#2357816
08/21/17 09:49 PM
08/21/17 09:49 PM
|
Joined: Nov 2010
Posts: 105 Ontario, Canada
D149
OP
member
|
OP
member
Joined: Nov 2010
Posts: 105
Ontario, Canada
|
I have an 800 Edelbrock, which was on the original 383 when I got the car. I could not get rid of the off idle stumble. I'm not a great engine tuner, but I tried everything with that carb. It made it very hard to drive with a 4 speed!
1968 Valiant Signet 4dr. 273 4spd 1969 Road Runner 383 4spd 1969 Barracuda 318 auto 1970 Dart Swinger 340 4spd 1975 Cordoba 400-4bbl 1988 Caravelle 318 Auto 1999 Dakota R/T 2000 Viper GTS 2001 Ram 2500 Diesel 6spd 2018 Dodge Challenger GT (Winter beater!)
|
|
|
Re: Carb recommendation
[Re: DaveRS23]
#2357817
08/21/17 09:50 PM
08/21/17 09:50 PM
|
Joined: Nov 2010
Posts: 105 Ontario, Canada
D149
OP
member
|
OP
member
Joined: Nov 2010
Posts: 105
Ontario, Canada
|
DaveRS23 Who are the carb builders you would recommend?
1968 Valiant Signet 4dr. 273 4spd 1969 Road Runner 383 4spd 1969 Barracuda 318 auto 1970 Dart Swinger 340 4spd 1975 Cordoba 400-4bbl 1988 Caravelle 318 Auto 1999 Dakota R/T 2000 Viper GTS 2001 Ram 2500 Diesel 6spd 2018 Dodge Challenger GT (Winter beater!)
|
|
|
Re: Carb recommendation
[Re: Thumperdart]
#2357854
08/21/17 10:56 PM
08/21/17 10:56 PM
|
Joined: Nov 2010
Posts: 105 Ontario, Canada
D149
OP
member
|
OP
member
Joined: Nov 2010
Posts: 105
Ontario, Canada
|
Thumperdart What brand of carb would you recommend?
1968 Valiant Signet 4dr. 273 4spd 1969 Road Runner 383 4spd 1969 Barracuda 318 auto 1970 Dart Swinger 340 4spd 1975 Cordoba 400-4bbl 1988 Caravelle 318 Auto 1999 Dakota R/T 2000 Viper GTS 2001 Ram 2500 Diesel 6spd 2018 Dodge Challenger GT (Winter beater!)
|
|
|
Re: Carb recommendation
[Re: D149]
#2357876
08/21/17 11:27 PM
08/21/17 11:27 PM
|
Joined: May 2004
Posts: 12,397 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,397
Taxes & Virus's R-US, NY
|
So it runs like crap right....plugs look all un-even and its blubbery on take off.
First, I have to look everything up you posted to know what I need to know.
Cam has only 240 duration at .050" lift correct?
Next, your intake is a dual plane intake correct?
Cam recommends 750 double pumper right on their page!
Next, your problem is not the efi, its your timing curve. Since your running G1, it does not change or map the timing for you. I used that same system with almost the same cam with 80 less cubes with no issues. But I went and had my distributor recurved so I had 22* at idle....The standard Mopar distributors have way too much swing in them. It needs to be shortened. You need more timing and sooner with no extra total advance.
Next, your running a damn dual plan intake....Save yourself some money, pull it off, grind the center divider down and radius everything. Then add a 1" open spacer...port match the spacer to your intake exactly. change plugs, re-install intake and efi, and drive it and let it re-learn the fuel curve....
You will never beat the fuel map that system will give you with a carb, period. EFI does not fix other short comings in the combination. Motor wants fuel AND timing! Restrict either, and it runs like ........&$&$&*^98
If you want to get rid of the system, let me know...I have the perfect use for it right now.
Last edited by Dragula; 08/21/17 11:40 PM.
|
|
|
Re: Carb recommendation
[Re: D149]
#2357907
08/22/17 12:16 AM
08/22/17 12:16 AM
|
Joined: Jan 2003
Posts: 11,721 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,721
Portage,michigan
|
Quick fuel 850 s/s carb. Street strip carb, happy in both places
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
|
|
|
Re: Carb recommendation
[Re: B3422W5]
#2357920
08/22/17 12:42 AM
08/22/17 12:42 AM
|
Joined: May 2004
Posts: 12,397 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,397
Taxes & Virus's R-US, NY
|
Quick fuel 850 s/s carb. Street strip carb, happy in both places I had back to back timing slips, and when properly tuned, both were within .03 sec in the 1/8th mile. But the efi was cleaner, ran better, and didn't have to jet it for current conditions.... Take a guess how I know.....And personally, if I was to put a carb on his 440, it would be a Proform 750....They have had the best out of the box calibrations we have used to date.
|
|
|
Re: Carb recommendation
[Re: D149]
#2358054
08/22/17 11:59 AM
08/22/17 11:59 AM
|
Joined: Jan 2003
Posts: 12,171 Benton, IL.
DaveRS23
Special needs idiot
|
Special needs idiot
Joined: Jan 2003
Posts: 12,171
Benton, IL.
|
This is a very interesting article that applies here. http://www.hotrod.com/articles/how-to-pick-the-best-carburetor-for-a-street-strip-car/There are a lot of carb builders around and everyone will have a different opinion on who to use (and not use). But it is interesting to note that they all use the Holley 4150 platform to build from. Is there anyone building custom carbs off the Carter AFB or AVS base? A google search will bring in a lot of info on carb builders. But, the opinions/experiences on them are all over the place and really do not help narrow down which one to go with. And a lot depends on how good a tuner you are. The better the tuner, the less he has to be concerned with what calibration he starts with. But a less experienced tuner needs to get a carb as close as possible. Thumperdart, Holley, ProForm, Willy's, AED to name just a few.
Master, again and still
|
|
|
Re: Carb recommendation
[Re: Dragula]
#2358071
08/22/17 12:33 PM
08/22/17 12:33 PM
|
Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
|
I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
|
Quick fuel 850 s/s carb. Street strip carb, happy in both places I had back to back timing slips, and when properly tuned, both were within .03 sec in the 1/8th mile. But the efi was cleaner, ran better, and didn't have to jet it for current conditions.... Take a guess how I know.....And personally, if I was to put a carb on his 440, it would be a Proform 750....They have had the best out of the box calibrations we have used to date. I thought the Dominators I did for you out shined the EFI on the Hemi, and the 1050 Dommy out performed the "tried and true better than any" 4150" on the wedge............
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
|
|
|
Re: Carb recommendation
[Re: B3422W5]
#2358120
08/22/17 02:37 PM
08/22/17 02:37 PM
|
Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
|
Quick fuel 850 s/s carb. Street strip carb, happy in both places I could get behind that. Or an old school Holley 4781, or an AED HO-850. I stay away from "race" carbs in that type of application....... The low speed calibration is usually too rich for me.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: Carb recommendation
[Re: Dragula]
#2358133
08/22/17 03:18 PM
08/22/17 03:18 PM
|
Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quick fuel 850 s/s carb. Street strip carb, happy in both places I had back to back timing slips, and when properly tuned, both were within .03 sec in the 1/8th mile. But the efi was cleaner, ran better, and didn't have to jet it for current conditions.... Take a guess how I know.....And personally, if I was to put a carb on his 440, it would be a Proform 750....They have had the best out of the box calibrations we have used to date. I would listen to the above.. you only had a pump die on you but you arent happy with the injection.. a pump is way cheaper and if you listen to him you could get a better running ride and a whole lot cheaper.. I went with the multi point on my street rod..
|
|
|
|
|