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Gut
Dodge Dakota
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2/21/2004
14:44:39
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 Subject: Tbi to Carb swap
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Has anyone swapped from tbi to carb? i have a 90 318 cam forged ported polished and the tiny tbi cant keep up. I know I should have went magnum swap but its too late now, so please no smart ass comments. It is still an LA engine so i think parts from a pre mag carb 318 would bolt up? If so what aftermarket intake would fit?
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jameson
Dodge Dakota
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2/21/2004
15:51:56
| RE: Tbi to Carb swap
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You need the intake manifold, a carb, a fuel pressure regulator and maybe a distributor.
With what you have listed I'd say go aftermarket. I don't think Dodge has anything that will bolt up and if they did it would cost an arm and a leg.
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Rob C
Dodge Dakota
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2/21/2004
17:04:00
|  RE: Tbi to Carb swap
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Instead of doing all that work, have you considered trying to find a ported and polished performance throttle body to replace your stock unit? Maybe Dan at Fastman can help?
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red 91
Dodge Dakota
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2/21/2004
20:33:59
| RE: Tbi to Carb swap
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I am interested in this swap too.
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WipLash
R/T
2/21/2004
21:41:59
| RE: Tbi to Carb swap
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Edelbrock has a 417hp Pre-magnum engine package. Their kit includes cam, intake, and heads. It is carburated. Their test engine had 9.7:1 compression and headers. Go to edelbrock.com.
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gen1dak
Dodge Dakota
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2/21/2004
23:08:17
| RE: Tbi to Carb swap
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MP has the M1 for LA engines (not just Magnums), single or dual plane. The Edelbrock Performer is the only smog-legal replacement (not that the carb will be), and the ports match the 318. Orrrr, you could go with 360 intake and heads, 360 TBI and computer and hang on.
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WipLash
R/T
2/22/2004
00:12:30
| RE: Tbi to Carb swap
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Edelbrock also makes a trick MPI sytem for the pre-magnum. That with the 417hp RPM Performer Package would be the set-up to got run over Lightings.
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bakindak
Dodge Dakota
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2/22/2004
11:44:55
| RE: Tbi to Carb swap
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Ya that MPI system looks nice. I am considering one of those for my 91, but it is a LOT of cash. and there is that smog issue too :(
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WipLash
R/T
2/22/2004
12:03:25
| RE: Tbi to Carb swap
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I'm telling ya, I'm partial to the Gen1's and 2's anyway. I have not been happy with the gen3's either. Yeah, they look better and that's about it. Everything else about the gen2's is better. Especially the 92-93. Now, with the new LA engine aftermarket parts, I'm considering finding me a 1991 RC V8 and dropping that Edelbrock package under the hood. SCREW the Hemi!!
Especially a 5spd 91. Those things only weigh 3300lbs. Drop that 417hp package under there and go Corvette hunting.
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GUT
Dodge Dakota
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2/22/2004
15:10:53
| RE: Tbi to Carb swap
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I have no concerns as far as emissions. How much of a gain will i see with the 360 tbi , intake and computer. I think a carb will be better because as i mentioned i have a cam forged pistons and ported heads.Does anyone have any firsthand experience with this swap and will I gain anything as far as power?
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rt
Dodge Dakota
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2/22/2004
15:16:55
| RE: Tbi to Carb swap
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I CANT FIND THAT STUFF AT EDELBROCK.COM
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WipLash
R/T
2/22/2004
16:48:45
| RE: Tbi to Carb swap
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Alright, go to: http://edelbrock.com/automotive/index.html
then click on "intakes"
then click on "chrysler"
then scroll down the page to "Performer RPM 340/360"
Just beneith that link is the 417hp graph. Click on that.
That's it. It breaks down all the parts needed to make 417hp with a 340. The 360 should at least make 410hp with the same package and make more than the advertised 397ft/lbs of torque. I'm guessing 405hp/405ft/lbs min.
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vern
Dodge Dakota
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2/22/2004
19:33:18
| RE: Tbi to Carb swap
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what is the cams power band?
and its lift and duration?
you,ll to know these things before buying a intake,so it can be matched to the cam.
elderbrocks air gap intake is very good,you have a air gap between the motor and intake,LESS HEAT
to the intake from the motor
elderbrocks carb are very simple and great carb for the street right out of the box and very easy to tune for your needs
MP dist converision kits
you can hook your fuel line over on the tank.[theres a nipple on the fuel pump unit on top of the tank thats capped off,this line goes to the bottom of the tank so you can drain the tank to
change the electric fuel pump,but it works great for the out line for changing over to carb]
and install a manual pump
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Mike S.
Dodge Dakota
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2/22/2004
20:44:37
| RE: Tbi to Carb swap
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I have done this swap on my 91. I swapped heads and intake. I went with the Edelbrock Performer RPM package(heads,cam,intake) I saw a huge gain in power. I had a .030 over 318 with with 360 heads and intake and TBI before the swap. It ran a best et of 9.92(8th mile) with the TBI, now it has ran a best of 8.60 I installed a 125 shot of Nitrous over the winter, can't wait for the track to open :o).. (I would recommend going with a Edelbrock performer intake and a 600cfm vacumm secondary carb). You'll also have to run a aftermarket ignition and distributor,you can use the stock fuel pump with a pressure regulator for fuel. You will also need a voltage regulaor to make the altenator charge. I will be more than happy to asnswer any questions you have about the swap. Email me at Mikeqc11@cs.com
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gen1dak
Dodge Dakota
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2/22/2004
21:18:44
| RE: Tbi to Carb swap
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If you're going to use the standard Performer intake with the 360, you should port-match the Performer for best power. The runners are more 318-size. Best bet is the Performer RPM Air Gap. It's open underneath like the M1 so the intake plenum stays cooler, and this provides a bit more hp. However, it's a dual plane, so it has gobs of bottom-end torque. Snag the 800cfm Edelbrock carbs if you're shooting for something like that 417hp package. The 600cfm will have a bit more low-rpm torque, but will fall short on the top by a few hp. It's all in what you want. The Air Gap intake has the entire rpm range covered, so unless you're going bracket racing, it'll handle anything you want to put on a street engine. The built-in electric pump is fine. I use the Mallory single inlet, dual outlet fuel pressure regulator. Plumb the main outlet to the carb. Plumb the second outlet to the fuel return line. Don't feel cheated by not having a Magnum. The LA's use the very stout and stable shaft-mounted rocker system, have been around for decades, and hp parts are a bargain. Also, if you find the Magnum-envy unbearable, you can always swap out the top-end with Magnum parts (heads, intake, misc. smaller pieces) and you'll have a Magnum. You can jump the ASD relay and the AC, alternator, and fuel pump will run without incident.
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Mike S.
Dodge Dakota
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2/23/2004
06:01:44
| RE: Tbi to Carb swap
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With the 318 heads ported or not I would go with the Performer intake and 600cfm carb. Now if you had some major work done to the heads you can run the Performer RPM intake,but if the intake runners were not open up to the larger size stick with the performer. I can tell you from experience that the RPM intake and 750cfm carb with 318 heads will KILL bottom end. That was with a 3000 Stall and 4.10 gears. You can still get around 5800 rpm worth of power out of the Performer intake with the smaller carb.
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gen1dak
Dodge Dakota
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2/23/2004
22:27:38
| RE: Tbi to Carb swap
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The Performer will open up to 360-size. And, I wouldn't call 364 ft/lbs corrected torque at 2500rpm a dead bottom end. This torque number peaks with 388 lbs at 4500rpm. This is with 360 heads/2.02 valves, and OEM 360 intake, 750 carb, 9.8 compression, 222/230 @ .050 with .470/.480 lift. 750rpm idle. That's a 318, by the way.
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Mike S.
Dodge Dakota
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2/24/2004
06:07:34
| RE: Tbi to Carb swap
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I'm just speaking from what I have experienced. I put the RPM air-gap intake and 750cfm performer carb on my 318 with slightly ported stock heads and my bottom end was dead. Almost no power till 3500 rpms. Sounds like you have a really nice set-up on yours,you had it to the track to see what it will run?
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Heat
Dodge Dakota
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2/24/2004
18:50:44
| RE: Tbi to Carb swap
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Look at Megasquirt, you may be able to upgrade your computer to a standalone and put in bigger injectors on a budget. You could also have a carbed intake like the performer machined for port fuel injection and use megasquirt to control it. There are a ton of cheaper options with it if you are willing to do the work.
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gut
Dodge Dakota
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2/24/2004
18:57:13
| RE: Tbi to Carb swap
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still too much $$$$$
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gen1dak
Dodge Dakota
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2/24/2004
20:43:07
| RE: Tbi to Carb swap
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Oh Hell yeah Mike. If you're pretty mild or stock on the bottom (cam, etc) you'll lose bottom-end power with what you're talking about...especially the stock LA 318 cam. It's tiny. The Performer is much better with that setup. The RPM intakes are really intended for the size (and bigger) cam I mentioned. The difference is in that the bigger cam with a better intake will make more power even in the low-end.
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