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V6 Dakotas
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Jail Striped
Dodge Dakota
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11/15/2001
01:50:39

Subject: I Messed up, Help
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I hava an 99 automatic 3.9 Dak. I've added the Air Aid intake kit, Power Aid throttle body spacer(what a waste), 180 degree therm., I notice a little performancem not bad for the money. But then I got a Gibson cat back system 2.5" in 3" out. Is it just my imagenation or did I loss power????



Roby
Dodge Dakota
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11/15/2001
02:08:37

RE: I Messed up, Help
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I knmow how you feel, when I got my exhaust I felt like I lost some power too, but I think it was all in my imagination. I think.
Roby



DeepDak
Dodge Dakota
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11/15/2001
06:35:53

Sounds like you lost back pressure...
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The truck feels a little sluggish at low rpms right? The problem is that your not pushing enough air into the engine to offset the larger exhaust. A performance throttle body will help but then the intake manifold slows things down. I felt the way you do after my custom y-pipe and cat, not the same low end. My top end benefitted quite a bit; truck felt stronger than ever in the higher rpms. I got my low end back when I changed from a 30" diameter tire to a 28" (and slightly thinner); which got my rearend ratio back to 3.55.
Work a little more on getting more air in and less on air out. A TB with a port matched intake manifold with smoothed runners (perhaps cut shorter), performance cam, and ported heads w/5 angle valve job will do the trick! ;) Just some ideas.

Eli



bernd
*GenIII*
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11/15/2001
11:04:14

RE: I Messed up, Help
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Jail Striped: You may have lost a little bit of bottom end as a larger exit system will move the powerband up to a higher RPM range. Not a big thing though...you can compensate with a modified TB (or V8 TB swap) which will give you the "punchy" feeling back from off-idle. (Also, use the TPS trick to get the throttle response a little better.)

Modifying the heads, cam, and intake will only move your powerband higher (cam depending in some cases) and will not fix a bottom end TQ loss.

On the tire size/gear ratio...3.90:1 with an automatic is just about perfect for the V6's.


1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous

Jail Striped
Dodge Dakota
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11/15/2001
22:46:50

RE: I Messed up, Help
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Thanks for the info guys. Hey Bernd I think I'm getting the TB, you said the one from the 5.9? right? Will that come with everything I need to install it? And what is the TPS trick you were talking about and should I do it to the stock or the new TB?
Thanks again



Lesley
GenIII
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11/15/2001
22:57:32

RE: I Messed up, Help
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I'm getting my JBA headers installed tomorrow morning. I just bought a Borla catback, should have it on within the month but I don't have the TB on yet. (I think the mail lost my cables). I figure the truck should be fairly balanced so far with what I'm getting done to it. Then, hopefully I get the TB on at the same time as the catback.
Does anyone know anything about, or have an opinion on Borla tips? Effective or mainly for show? (or noise - no thanks).

97 3.9 V6 Sport Club Cab. Black. Auto 3.55
Quick D Intake,
Autolite 3923s with Borg Warner Wires
Awaiting Installation: JBA headers, Borla catback V8 R/T TB,

Jail Striped
Dodge Dakota
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11/15/2001
23:02:15

RE: I Messed up, Help
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lesley the cat back will sound nice!! For what I know tips don't make much difference unless you get the turn downs, they amplify the sound. Let me know what you think of the TB when you get it done.




Lesley
GenIII
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11/15/2001
23:09:14

RE: I Messed up, Help
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Sure I will. I guess I will hold off on getting a nice looking tip, I've spent a pile of money lately.

97 3.9 V6 Sport Club Cab. Black. Auto 3.55
Quick D Intake,
Autolite 3923s with Borg Warner Wires
Awaiting Installation: stainless JBA headers, Borla catback
V8 R/T TB

DeepDak
Dodge Dakota
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11/16/2001
00:47:17

Bernd...
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I plan on doing my heads,cam,intake (what I said in my post) sometime this summer. 1. Will I feel a big loss of bottom end plus a sweet gain of top end? or 2. Will I NOT feel a loss of bottom end and gain top?

Got my adjuster and t-stat two days ago, and will probably install this weekend. Thanks!
Eli



bernd
*GenIII*
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11/16/2001
01:32:15

RE: I Messed up, Help
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Jail: The 5.2/5.9L throttle bodies are the same size. Yes, we supply the cable, gasket, and the (New) TB comes with a new TPS and IAC solenoid.

Deep: That would depend on the cam, intake and head modifications.

1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous

DeepDak
Dodge Dakota
JOIN HERE


1/07/2004
18:05:35

RE: I Messed up, Help
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I plan on doing my heads,cam,intake (what I said in my post) sometime this summer. 1. Will I feel a big loss of bottom end plus a sweet gain of top end? or 2. Will I NOT feel a loss of bottom end and gain top?

Got my adjuster and t-stat two days ago, and will probably install this weekend. Thanks!
Eli



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