Ported TB questions.......
Thread Starter
Joined: Nov 2001
Posts: 816
Likes: 2
From: Lake Delton, WI
Ported TB questions....... I am considering getting the S2 ported TB that a lot of people think so highly of. Anyway, what does porting a TB do that requires some miles be put on before the full benefits are reached? It's not like porting a MAF that is calibrated for a certain x-sectional area and therefore when you port it you will be running leaner from the under reported airflow.
I guess my main concern is if the computer has to 'adjust' to the ported TB, that means to me that the computer will be changing some parameters (Ltrims, etc) and would maybe put me out of where I have tuned it in with my MAFT. I notice that a lot of people that do this also have a ported MAF (as I do) without a MAFT, so whatever the PCM changes must not effect it enough to justify re-tuning.
Any comments?? I know one of the benefits is less turbulence, but that would not require a couple hundred miles to notice, I wouldn't think.
Thanks
Paul
I guess my main concern is if the computer has to 'adjust' to the ported TB, that means to me that the computer will be changing some parameters (Ltrims, etc) and would maybe put me out of where I have tuned it in with my MAFT. I notice that a lot of people that do this also have a ported MAF (as I do) without a MAFT, so whatever the PCM changes must not effect it enough to justify re-tuning.
Any comments?? I know one of the benefits is less turbulence, but that would not require a couple hundred miles to notice, I wouldn't think.
Thanks
Paul
Thread Starter
Joined: Nov 2001
Posts: 816
Likes: 2
From: Lake Delton, WI
Re: Ported TB questions....... I guess I am just wondering if a ported TB will cause you to run any leaner?? In theory it shouldn't, as the MAF is before the TB and therefore all the reported air should be accounted for anyway.
I guess I am curious as to why it requires a couple hundred miles before you notice any gains.....and what actually does the PCM learn after those miles?
Paul
I guess I am curious as to why it requires a couple hundred miles before you notice any gains.....and what actually does the PCM learn after those miles?
Paul
Re: Ported TB questions....... The only adjustments I made was to correct the idle screw setting and make sure the IAC count was right.Saw no difference on L-terms or A/F.I did notice quiker throttle response and picked up 8 rwhp on my setup.This was with a Epoxy'd bellmouthed TB,Same as Shaner does.Too bad Shaner is booked,I was on the waiting list since April and still haven't got notice,so I went to a friend that did it and got another 130cfm out of it with the stock blade.
Thread Starter
Joined: Nov 2001
Posts: 816
Likes: 2
From: Lake Delton, WI
Re: Ported TB questions....... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Slowhawk:
<strong>The only adjustments I made was to correct the idle screw setting and make sure the IAC count was right.Saw no difference on L-terms or A/F.I did notice quiker throttle response and picked up 8 rwhp on my setup.This was with a Epoxy'd bellmouthed TB,Same as Shaner does.Too bad Shaner is booked,I was on the waiting list since April and still haven't got notice,so I went to a friend that did it and got another 130cfm out of it with the stock blade.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">He will be porting my current TB and sending it back to me. I have mine stop block modded to give me 100% throttle abd I didn't want to get one that also had it done and have a possibility of the TPS voltage being too high.
Why and how did you to correct the idle screw setting? How did you check to see if the IAC (what is that?) count was right? I have AutoTap.....
Paul
<strong>The only adjustments I made was to correct the idle screw setting and make sure the IAC count was right.Saw no difference on L-terms or A/F.I did notice quiker throttle response and picked up 8 rwhp on my setup.This was with a Epoxy'd bellmouthed TB,Same as Shaner does.Too bad Shaner is booked,I was on the waiting list since April and still haven't got notice,so I went to a friend that did it and got another 130cfm out of it with the stock blade.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">He will be porting my current TB and sending it back to me. I have mine stop block modded to give me 100% throttle abd I didn't want to get one that also had it done and have a possibility of the TPS voltage being too high.
Why and how did you to correct the idle screw setting? How did you check to see if the IAC (what is that?) count was right? I have AutoTap.....
Paul
Banned
Joined: Feb 2002
Posts: 338
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From: Dallas, Texas
Re: Ported TB questions....... Shaner will screw you around for months. There are other vendors doing an epoxied TB that flows as well as Shaner's with comprable gains.
After 3 months I went elsewhere to Scott Jantzer. I'm very pleased with the results.
After 3 months I went elsewhere to Scott Jantzer. I'm very pleased with the results.
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Re: Ported TB questions....... I have a LPE ported TB it was worth 3rwhp and 5 rwtq over no ported TB. I don't think the average bolt on car will gain 8 rwhp with a TB, unless the stock TB blade wasn't opening all the way. My stock TB blade didn't open all the way and my car gained 3rwhp. Car's with heads and cam can gain up to 10rwhp with ported TB's.
A ported TB will not lean the car out UNLESS there is vacuum leak.
For $80 and thirty minutes to swap out it's worth doing, I think.
A ported TB will not lean the car out UNLESS there is vacuum leak.
For $80 and thirty minutes to swap out it's worth doing, I think.
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