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chucks97ss
Dodge Dakota
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12/11/2002
10:15:42
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 Subject: Throttle bodies for 4.7?
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Who makes them, and what's the best bang for the buck? I know Hughes has a ported stock version... how's that compare to a 70 or 72mm KRC?
Thanks
Chuck
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j
GenIII
12/11/2002
22:08:55
| RE: Throttle bodies for 4.7?
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Check out socaldakota.com.
2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.
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.alex.
Dodge Dakota
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12/11/2002
23:04:35
| RE: Throttle bodies for 4.7?
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I'd say the best bang for the buck depends on your current mods. The 70 mm billet F&B is a very good piece and Socaldakota.com has them for $370. It helps to have a cold-air intake tube and 3" exhaust from the y-pipe all the way to the tail-pipe (including a 3" catalytic). The 70 mm really compliments a comuter flash quite well. This makes for some really good midrange and low end gains in power.
Once you have a few more mods, the 72 mm billet F&B (also for $370 at socaldakota.com) is even more complimentary. The computer flash almost becomes a necessity in this case, as the largest power gains will be had above 4500 rpm. No use in shutting down the motor at 5500 rpm when it's making good power all the way up to 6000 rpm.
Here's a glimpse of my mods and the results....
http://www.dragtruk.com/ENTRIES/0F64H9L1P5IL.html
The prices at www.thefastman.com seem to be better, but he's also charging you $150 for the stock core. His package (71 mm based on the stocker) totals out at $350. You will get that $150 back if you send in your factory TB, but with the F&B, you get to keep your stocker for when you sell the truck later on.
Other than that, you can check out Hughes Performance, but the 65mm and 68 mm have been proven to just not cut the mustard next to the F&B.
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cudashoe
DakotaEnthusiast
12/12/2002
01:41:32
| RE: Throttle bodies for 4.7?
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Alex - or anyone, please after two+ years of searching, can ANYONE post 4.7 throttlebody dynos. ANYONE????
Now I want to see JUST THE THROTTLE BODY dynos, not this BS sht I am seeing that the "also changed the air intake, and the exhaust".
2000 4.7 5- speed, 1989 Shelby #799 White
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CThomp
Dodge Dakota
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12/12/2002
07:08:47
| RE: Throttle bodies for 4.7?
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The Fastman doesn't charge you the core...only if you fail to ship him your stock TB. I payed $200 shipped for my 68mm Fastman. He would have only charged me $225 for the 71mm...which I may end up getting down the road. I got the Fastman because I don't look at my engine alot. I just want the flow. The Fastman does make a quality product...he just needs to update his website.
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.alex.
Dodge Dakota
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12/12/2002
09:13:19
| RE: Throttle bodies for 4.7?
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Cuda.... nobody has done ONLY the TB. Therefore nobody can prove that the hp gain is a reality. I can show you the graphs where I picked up 7 ft-lbs of tq going from 70mm to 72mm, and the fact that I am making 308 rwtq at 3500 rpm. I can tell you that just adding a throttlebody to a motor, big or small, billet or stock won't get you a damn thing unless you change out quite a few other things. That's just how it works. So trying to justify hp per dollar on a per-component basis is kinda frivolous.
CThomp.... that's the meaning of a core. I had no downtime and I still have my factory TB. That way, once Dan Cuda can prove that these billet TB's aren't worth it, I can put my factory TB back on and sell the 72 mm as a paper weight.
Cuda..... one more thing. You're an old Mopar guy, right? You know about carburetors... You wouldn't put a huge exhaust, a bigger cam, some hot heads, and a hot ignition on a motor and then keep the little 625 cfm Carter just because the 750 Holley "isn't worth the money" would you? But, at the same time, you couldn't just step up to a 750 Holley with no other mods on your 340 and expect to see huge gains, right? Things cost $$, and performance modifcations have to work together in whole systems. It's that simple.
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Texas Todd
Dodge Dakota
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12/12/2002
09:46:49
| RE: Throttle bodies for 4.7?
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.alex.
nice website you have
I've added it to my favorites,
we have many of the same mods, but I have a quad, and I don't race it. gives me ideas and what my mods have done thus far.
Thanks,
Todd Bouton
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.alex.
Dodge Dakota
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12/12/2002
10:17:22
|  RE: Throttle bodies for 4.7?
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Now that I know how to make these trucks go fast, I may go with a quad next time.... They have a lot more interior room than even my club cab.
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cudashoe
DakotaEnthusiast
12/12/2002
13:45:13
| RE: Throttle bodies for 4.7?
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yea I understand the Carb issue, but that also changes the fuel flow as well. A TB doesnt.
Now your gains from 70 to 72 are quite good.
From dynos that I have seen that also included new exhaust and intakes vs. the ones with JUST exhaust and intake with no TB change are the same.
Question to ANY dealer/manufacture. - Why has NO ONE from the TB industry posted JUST TB only numbers? Now I will give you the exhaust and intake mods. How about a dyno on a 4.7 TB change on a truck that has had at least these two mods done? Stock 68 vs. ported 68, stock 68 vs. 70 and 72. Post some numbers, shut me up!!
I bet the ones without intake and exhaust mods might show a loss!
Alex - quad???? RC!!!
2000 4.7 5- speed, 1989 Shelby #799 White
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.alex.
Dodge Dakota
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12/12/2002
14:14:29
| RE: Throttle bodies for 4.7?
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Dan...
1. I'm SURE that an unmodded truck absolutely will LOSE power with a swap to a big TB. At that point, your arguement about slowing the velocity of the intake charge is absolutely valid. But once you open up the exhaust (true duals, no cats), the intkae manifold (the HO piece or better), and the air filter (intake tube, K&N)then the throttlebody becomes the bottleneck/choke point. Sure, the intake charge is maintaining its speed, but now you need more volume as well. That's where the extra 3-5 mm of throat diameter come in. At that point, the intake charge is only losing "so much" speed.... As for price, I'd have to say that yeah, $370 is steep, but you are getting what you pay for. $550 from that guy out in Texas was ridiculous and certainly NOT worth the gains. Now that Sam can offer them for so cheap (socaldakota.com), it's hard not to at least consider saving up for one.
2. Yeah, the carb meters fuel as well, but the PCM is dependant on the TB (in a way) to know how much fuel to send in thru the injectors. The amount of air that gets in to the intake manifold and hits the map sensor. That tells the PCM that things are really moving and it's time to send in more fuel. So, in a way, you are also increasing the amount of fuel going in when you jump up in TB size.
3. Reg Cab? Only if it's a second truck for me... I've got a 36" inseam and I've got to put my legs somewhere when I'm driving 6-8 hours to see my brother in Richmond. If I get a Gen 2 and make myself an all-out street stomper, and dont' have to drive the boss or girlfriend around (or both for that matter) then yeah it'll be a fly-weight Reg Cab.......
Actually I just saw a post about 3.9L Stroker Kits for $3200. Punches that 6cyl out to a 4.7L and if you were to fab up a turbo kit (lots of room under the Gen 2 hood) then you'd have a stroked & huffed Shifter Kart of a truck!! Hahahahahahaaaa....
Three words: Home Equity Loan.
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CThomp
Dodge Dakota
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12/13/2002
08:16:53
| RE: Throttle bodies for 4.7?
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DOn't mean to get into a ranting defense over TB manufacturers but I had no downtime when I got my fastman. He sent me the 68mm then I sent him my old one a week or less later. He gives you 30 days or so before he charges you the deposit money. He said he'd call and warn me too. But either way. Its up to the consumer. If you want stock look...go with the Fastman. If you want shiny after market look...go with the F&B. If you want aftermarket non-shiny look...go with thew EHO from premier-automotive.
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CThomp
Dodge Dakota
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12/13/2002
08:21:35
| RE: Throttle bodies for 4.7?
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After just looking at your truck alex...I need cams!!! This is killin me. I've been holdin out for either the KRC's or premier-auotmotive's. Just depends on which ones are more streetable.
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.alex.
Dodge Dakota
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12/13/2002
10:11:36
| RE: Throttle bodies for 4.7?
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I think I am gonna head down to Marty's shop in February or March and we're gonna put in a set of his street cams. I think I'd like to do a few other things, too. I might even go for a supercharger, but there's lots of research to do on that matter..... but the HO cams in themselves (or with the HO intake manifold) are a hell of a performance gain. With my current set-up I have butt-loads of torque all the way across the rpm band. It's too fun to drive on the streets..... And the highway is just a trip! Cruising along at 70 mph in 5th gear, it will squirt right up to 90 without even straining and I dont' have to downshift either! Hahahahah
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cudashoe
DakotaEnthusiast
12/15/2002
04:20:03
| RE: Throttle bodies for 4.7?
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Well again my point is clear. people- DO NOT get a TB for a 4.7 UNLESS you have first done the PCM, exhaust and intake. Then get a TB.
I just hate seeing people spend $400 for a TB when they can do their PCM for that and get three times the gains!!!
2000 4.7 5- speed, 1989 Shelby #799 White
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