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MACE
Dodge Dakota
9/25/2001
10:08:20
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 Subject: 70mm TB and Stock Z-tube - Problems!
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Message:
I have about 400 miles since the install of the Flowmetrics 70mm TB using my stock Z-tube on my 2001 4.7
With at least two PCM resets about 200 miles apart, the performance just doesn't seem to match the stock TB with stock Z-tube.
Anyone else have this problem?
Also, with needing to use the old and new adaptor to mate the stock Z-tube to the new 70mm TB, I can not align the tube to NOT rub on the A/C lines
and the hood, and believe me, I've had the setup taken apart and put back together again, many time. Has anyone re-aligned their A/C lines for better clearance, and if so, not a major effort?
Still have a squeaking sound when hitting the throttle and the idle is never rock steady like it was before, it will flucuate between 500 to 1500 and I know I'm not covering up the opening at the base of the TB with the Z-tube and/or adaptor.
At least the check engine light hasn't come on recently.
I'm hoping a custom 4 inch tube with proper adaptors clears up every problem.
Not complaining (yet) just explaining to see if anyone else with the new Flowmetrics TB and stock Z-tube have the same problems. I'm just not happy with the performance of my truck at this time, not to mention potential damage that could be done to the A/C lines.
Bernd, please email me re: the custom tube, haven't seen a reply back from you on the past emails sent out over the last week.
For those with the 70mm TB and custom 4 inch tube, any problems with rubbing on the A/C lines and/or hood?
Thanks!
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SilverDakTx
Dodge Dakota
9/25/2001
10:54:02
|  RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Mace,
I have the stock TB, but when I got my z tube, it was also rubbing up against the A/C lines, which I was told by John at Intense Performance that they made a mistake on a batch of 10 tubes and they were too long. He said I could send just the pipe/tube part back and he would cut it for me and send it back. But I just went to wal mart and got a cheap saw, wrapped the tube with electrical tape, and started sawing away. I cut close to an inch off the end where the tube meets the TB, and now it clears my A/c lines with no problems.
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MACE
Dodge Dakota
9/25/2001
11:02:47
|  RE: 70mm TB and Stock Z-tube - Problems!
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Message:
SilverDakTx:
The same thing happened to me as well and John was kind enough to work with me on that issue, he sent a shorter (much shorter) tube, but I found by taking the 'long' stock Z-tube and playing around with the alighnment at both ends, I had about 1 inch of clearance over the A/C lines.
With the new TB and stock tube, and having to use both the old and new couplers (at least one other person had to do the same: the large end of the new coupler was one size too big to snug up the stock Z-tube to the TB), I have rubbing from both the A/C lines and the hood, not good.
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Dr.Q
Dodge Dakota
9/25/2001
15:55:31
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Dang Maceter! I was hoping you'd have nothin' but good things to say about the 70mm tb! I hope you work things out and report back and let us know how your performace is affected (hopefully for the better!). I've been trying to get info on TB's for the '01 4.7 and so far haven't heard anything from Bernd or the Fastman. Anyways, wish you luck brother, I know that's mucho cashish!
Q
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SA
Dodge Dakota
9/25/2001
20:46:58
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I have a TB spacer, had to cut an 1 1/2 inches off the z-tube. I must of gotten one of them long tubes others talked about. Didn't call anyone, just hacked it down to size.
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kicker01
Dodge Dakota
9/25/2001
22:09:41
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I have the 70mm TB and the matching 4" Ztube and I dont have any clearance problems with the AC lines or the hood. I had to give my PCM a few days to adjust for the new mods but after that I could feel a definate gain in acceleration.
'01 RC 4.7 5spd
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Dr.Q
Dodge Dakota
9/25/2001
22:41:24
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Hey kicker,
Any dyno, 0-60 or 1/4 mi numbers? Does it idle well and any MPG difference? Don't mean to play 20 questions. But, inquiring minds want to know! I'd appreciate any info you could provide.
Q
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kicker01
Dodge Dakota
9/25/2001
23:11:22
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Sorry, no dyno or 1/4 mi numbers yet. i plan on getting a single 3" catless exhaust though i havent decided on which muffler to get. As soon as I get this I will go to the track to get some numbers. I havent noticed any difference in MPG. I usually average 19mpg though. Right after the install the idle was 1000-1200 rpm but the PCM soon adjusted and it idles around the normal 600rpm now. Other than that I love the under hood sound of the air screaming into the intake at high revs.
'01 RC 4.7 5spd
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MACE
Dodge Dakota
9/26/2001
14:39:44
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Glad to see the new 4 inch custom Z-Tube mates up to the 70mm TB with no clearance issues.
As mentioned, I must of also gotten one of the stock z-tubes that was cut too long, but working
with John resolved that issue.
Hey Bernd, still waiting on your email re: our discussion on taking care of my current problem.
Was gonna call ya but I've lost your number.
Hoping to hear from you soon...thanks.
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Keith
Dodge Dakota
9/26/2001
16:11:59
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I installed the 70mm TB with the 4 inch custom Z-Tube last weekend and I have no clearence problems what so ever. Idle is around 600 and steady. I have the stock exhaust and I'm thinking I'll keep it that way. I see a huge improvement across the entire power band, especially down low. I'm afraid if I go with a 3" cat-back, I'll loose that low-end bump. Besides, this give me the 'sleeper' look and sound.
All I can say is that this combo really woke this truck up. Too early to tell about MPG yet, but it seems to be better, even with my foot in it.
00 RC, SLT+, 4.7, Auto, 3.55 LSD, Tire & Handling, HD Service
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rookie48
Dodge Dakota
9/27/2001
07:09:41
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I've just purchased a 2001 Dakota QC w/ 4.7L V8 (less than 2000 miles on it). I already installed a Flowmaster 50 series muffler on the stock 2.5" exhaust. I am preparing to install an Intense Performance Z-Tube but was not considering the 70mm TB... where can I get more information on this aftermarket TB? Who manufactures it?
TIA!
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SA
Dodge Dakota
9/27/2001
23:06:43
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Keith, I think you got it right. I put on a 3" Gibson after the z-tube. Sound better but I think I lost out on the deal.
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Skeeta
Dodge Dakota
9/28/2001
01:39:14
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
WHAT IN B-JESUS? My 2001 4.7 automatic can do several left-turn fishtails, unlimited right-turn fishtails (on pavement) and will get a healthy scratch moving straight ahead at 20 mph (on concrete). Although it did run well stock, I installed a Magna-flow cat-back and K&N filter-charger. Noticed a little improvement and good sound, but it could not do what it can do now.
Last week I had PCM flashed by the dealer and it is a whole new truck. I can't believe it. Could the PCM flash after such minor improvements made that much difference in the low end?????????? Have not tested top end to see difference.
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Skeeta
Dodge Dakota
9/28/2001
01:45:34
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Posted the above message here because I WAS planning to add the Z-tube and 70"TB, but now wondering if current performance will suffer or even if its needed.
CORRECTION ON ABOVE MESSAGE . . .
Strike "Right-turn fishtails"
Intended to say "right-turn right tire spin" and that's no fun.
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Doug McCoach
Dodge Dakota
10/02/2001
00:28:53
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Skeeta, what flash did the dealer do for you? I don't know any dealer that would do a performance flash. Please tell more...
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MACE
Dodge Dakota
10/23/2001
15:55:02
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
A Update:
Now have the custom 4 inch Z-tube connected up to
my 70mm TB.
Performance and gas milage (hit 19.5 Highway for the first time ever, today) have improved nicely
My 4.7 with 3500 miles is now running the strongest it has, since I took delivery on 5/2/01
Still have a squealing noise and sporadic idle (with a un-related check engine light (1281: coolant too cold))...will re-check the mating of the Z-tube to the 70mm TB, could this be the reason for the squealing noise (not a tight enough seal between the Z-tube and TB?)
Re: the sporadic idle (when warmed up and in park, can idle as high as 1500, sitting at a stop light, a rough idle going from 400 to 700 RPM), what could cause this?
Have done a few PCM resets with hundreds of miles driven between resets. Any suggestions for trouble shooting this and fixing the idle, would be appreciated.
Thanks in advance.
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smittyt2
Dodge Dakota
10/23/2001
16:25:18
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I am having the same issues. If you rev over 2000 or so while in park it will then idle at around 1200. This only ever so often. I also have sporadic idle sometimes while in drive. On it's own it will rev from 600 to about 800 back and forth.
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smittyt2
Dodge Dakota
10/23/2001
16:25:35
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
I am having the same issues. If you rev over 2000 or so while in park it will then idle at around 1200. This only ever so often. I also have sporadic idle sometimes while in drive. On it's own it will rev from 600 to about 800 back and forth.
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MACE
Dodge Dakota
10/23/2001
16:43:35
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
smittyt2:
You described exactly what happens to me, sitting
in my driveway after a 30 minute commute home, it will idle normal at say 600 RPM, I goose her to 2k or so, and the idle won't go below 1200-1500, OR, just putting her into park from the drive home, it jumps up to 1200-1500 RPM and stays there...true to be the female that I label her...she is fickle and doesn't do this all the time.
And yes, half way home, I have to come off the highway to finish my commute on local roads, at a
stop light (while in park), I get a rough idle, going from 400 to 700 RPM, back to 400, up to 700, etc...would do this with and w/out the A/C being on.
Ok you experts, thoughts on why this happens? Two folks now showing this problem, anyone else?
(FWIW, it did this with the 3 inch Z-Tube as well)
No squealing when giving it gas? Not a sucking in of air sound, but more of a mechanical noise...hmm, WD40 needed on the cables/linkage?
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Jimbo
Dodge Dakota
10/23/2001
18:59:51
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Mace - I had a squeal coming from under the hood and it turned out to be the A/C clutch bearing. Just want to make sure you're not getting fooled into thinking it's the intake.
rookie48 - any performance/MPG gains/losses with the 50 series flowmaster and stock pipes? I was considering a 40 series for my 4.7 but want to keep the stock pipes to retain some back pressure.
F&B check out www.flowmetrics.com or www.speedtweaks.net
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rookie48
Dodge Dakota
10/24/2001
12:12:42
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Jimbo:
I was getting 15.5 MPG Hwy/13.0 MPG City prior to the FlowMaster mod. I haven't had the chance to run the highway since the mod but judging from the current city gas mileage readings I would expect a .5 to 1.5 MPG increase.
It sounds really good - low rumble at idle, very throaty up to 3500RPM, after that I'm a bit disappointed (even thought I don't run up there all the time ;->). At 5500RPM and WOT is seems to hiss more than I expected. I guess if I was going to run it wide open all the time a less restrictive exhuast would have be appropriate.
Just for reference, I paid $115 for the Flowmaster (I know the guy who owns the parts store) and $60 to have it professionally installed. The installer did a top-notch job, tucking it neatly out of harms way and sight....
I'm going to the Z-tube next month but may investigate the 70mm TB situation first. I'd like to hear from anyone who has experienced the stock versus 70mm TB conversion and what the pros/cons have been...
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MACE
Dodge Dakota
10/24/2001
13:14:10
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
Jimbo:
The squealing started the day I put on the 70mm TB
It squealed with the 3 inch Z-Tube and now with the 4 inch custom Z-tube.
I don't suspect the intake
Re: the 70mm TB, I'll be looking at the blade and cables/linkage...
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bernd
*GenIII*
10/24/2001
14:03:37
| RE: 70mm TB and Stock Z-tube - Problems!
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Message:
MACE: I've forwarded the posting to Bruce at Flometrics and am waiting for his ideas on the idle issue.
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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MACE
Dodge Dakota
10/24/2001
15:48:23
| RE: 70mm TB and Stock Z-tube - Problems!
IP: Logged
Message:
Bernd:
Thanks for giving a heads up to Bruce. Let me know
if he has anything specific he wants me to look at or check...I'll post a update after I check to make sure everything is snug and tight, with a little bit of WD40 applied here and there.
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