Raptor's Port and Polish
well.....im done. i even put some buffing compound and polishing compound when i finished and on my CAI tube.
Pros and Cons.....
Pros: On the initial test drive my "seat of the pants" dyno yielded considerable gains. 1st gear gets more low-end power, 2nd and 3rd's top-end are in love with me now.
Cons: Idle dropped from 850 to 750....ehhhh.....and my SG2 shows a TPS reading of 22 (should be 20). I took the buffer over the butterfly, so i may have knocked something out of alignment. Its not DIRE but not something I want permanent either. but the gains are noticeable. I'm no HP expert (as many of you know) but I'd have to say AT THE MOST is maybe 5 hp.
For the reasons associated with the risk in maybe screwing something up, I opted out of doing a write-up. I'm sure if anyone wants to do this later on, its pretty simple, but its just "iffy" right now until I can bump up my idle...
Note: the risk in doing this IMO is not great enough unless you are going "all out" I should say such as CAI, efans, UDP, exhaust and maybe turbo. doing this to a stock engine probably wont be worth it.
Pros and Cons.....
Pros: On the initial test drive my "seat of the pants" dyno yielded considerable gains. 1st gear gets more low-end power, 2nd and 3rd's top-end are in love with me now.
Cons: Idle dropped from 850 to 750....ehhhh.....and my SG2 shows a TPS reading of 22 (should be 20). I took the buffer over the butterfly, so i may have knocked something out of alignment. Its not DIRE but not something I want permanent either. but the gains are noticeable. I'm no HP expert (as many of you know) but I'd have to say AT THE MOST is maybe 5 hp.
For the reasons associated with the risk in maybe screwing something up, I opted out of doing a write-up. I'm sure if anyone wants to do this later on, its pretty simple, but its just "iffy" right now until I can bump up my idle...
Note: the risk in doing this IMO is not great enough unless you are going "all out" I should say such as CAI, efans, UDP, exhaust and maybe turbo. doing this to a stock engine probably wont be worth it.
You want to do me one in trade for some shackles maybe??
dosent matter, mines not stock, i still would have done it. i was referring to people who dont have a darn thing on their engine. i have a CAI, efans, and soon to have UDP and a tuner, so it does its part to help
Derek, if I can find one, i'll do it for ya in swap for some shackles! i was just thinking how I spent $20 on sanding wheels only to use them once. maybe it looks like i'll be able to use them again! do you have a spare or access to a spare? at the moment my local JY has nothing but tritons. and you say a tuner will fix the idle issue? cause if i did it exactly like i did mine i think you might have an idle issue. but i think i know what is wrong with mine, so im going to go outside and see if i cant fix it. but if you come across a 4.2L TB let me know and i can do it.
Derek, if I can find one, i'll do it for ya in swap for some shackles! i was just thinking how I spent $20 on sanding wheels only to use them once. maybe it looks like i'll be able to use them again! do you have a spare or access to a spare? at the moment my local JY has nothing but tritons. and you say a tuner will fix the idle issue? cause if i did it exactly like i did mine i think you might have an idle issue. but i think i know what is wrong with mine, so im going to go outside and see if i cant fix it. but if you come across a 4.2L TB let me know and i can do it.
Senior Member
Joined: Nov 2007
Posts: 423
Likes: 0
From: Central Florida
The truth about all your mods work is....you put EFans on and your truck overheats. Now you P&P your throttlebody and you have an idle issue.....
Technical Article 101:
-How to overheat your truck for 100 bucks.
-How to screw your idle up for free.
Last edited by ScottFF00; Jun 25, 2009 at 06:17 PM.
woot! my hunch payed off. i was sitting on the john thinking about my idle problem and immediately ran outside (after wiping and flushing of course) and i realized....my butterfly was backwards.
in the idle position, the butterfly sits at what looks like not a perfect vertical angle, but like a 91 or 92* degree incline, which diminishes to 0* as you open the throttle. well, since its sits at this angle, the rim of the butterfly was cut at an angle to sit flush with the face of the wall of the TB. Well while i was porting it, i took out the butterfly and ran my 180-grit over it very lightly (took that dull brown color and now looks like polished gold) and when i reinstalled it, i had it bass ackwards so it was completely wrong...thereby allowing more air in, throwing off the IAC. so i flipped it around, reset the computer and upon crankup...sure thing. she climbs to 650...700....750...790.... then i take it down the driveway and back and in neutral she sits at a modest 850 RPM. yay!
Scott, its okay if you don't believe me. i didnt do this to impress you. fact of the matter is i felt a difference and my other F-150 buddy drove my truck around and immediately wants me to do his now. I'm not saying im going to go out racing lightnings now. but if you want to chip some money my way, i'll gladly find another stock TB and drive to jacksonville and do a dyno for ya
and i dont have an "overheating" problem. with the 102* weather we've been having my truck is sitting at 205 degrees, but that is not a problem.
in the idle position, the butterfly sits at what looks like not a perfect vertical angle, but like a 91 or 92* degree incline, which diminishes to 0* as you open the throttle. well, since its sits at this angle, the rim of the butterfly was cut at an angle to sit flush with the face of the wall of the TB. Well while i was porting it, i took out the butterfly and ran my 180-grit over it very lightly (took that dull brown color and now looks like polished gold) and when i reinstalled it, i had it bass ackwards so it was completely wrong...thereby allowing more air in, throwing off the IAC. so i flipped it around, reset the computer and upon crankup...sure thing. she climbs to 650...700....750...790.... then i take it down the driveway and back and in neutral she sits at a modest 850 RPM. yay!
Scott, its okay if you don't believe me. i didnt do this to impress you. fact of the matter is i felt a difference and my other F-150 buddy drove my truck around and immediately wants me to do his now. I'm not saying im going to go out racing lightnings now. but if you want to chip some money my way, i'll gladly find another stock TB and drive to jacksonville and do a dyno for ya
and i dont have an "overheating" problem. with the 102* weather we've been having my truck is sitting at 205 degrees, but that is not a problem.
Last edited by Raptor05121; Jun 25, 2009 at 07:07 PM.
Senior Member
Joined: Aug 1999
Posts: 1,506
Likes: 0
From: Bakersfield, CA, USA
'Seat of the pants' aka 'butt dyno' readings are notoriously inaccurate.
Any change in power delivery or sound is perceived as 'more power' by the guy who spent the money and/or did the labor. Real changes should be verified using controlled experiments. Corrected dyno, 0-60 times, unbiased tester, etc...
As for a minor (5 hp?) gain, your actual peak power can vary that much or more with the change in the weather between breakfast and lunch. It is very difficult to measure changes that small with an instrument as unreliable as the butt dyno.
IMO, reducing air velocity through the intake by hogging it out is rarely a good idea, unless you are correcting a known deficiency.
Polishing a surface to increase airflow has been pretty thoroughly debunked over the years, specifically for intake ports. Pretty sure the same physics apply in the intake tract.
But hey, it's fun to work on your truck and learn on your own, so props for that!
Any change in power delivery or sound is perceived as 'more power' by the guy who spent the money and/or did the labor. Real changes should be verified using controlled experiments. Corrected dyno, 0-60 times, unbiased tester, etc...
As for a minor (5 hp?) gain, your actual peak power can vary that much or more with the change in the weather between breakfast and lunch. It is very difficult to measure changes that small with an instrument as unreliable as the butt dyno.
IMO, reducing air velocity through the intake by hogging it out is rarely a good idea, unless you are correcting a known deficiency.
Polishing a surface to increase airflow has been pretty thoroughly debunked over the years, specifically for intake ports. Pretty sure the same physics apply in the intake tract.
But hey, it's fun to work on your truck and learn on your own, so props for that!
'Seat of the pants' aka 'butt dyno' readings are notoriously inaccurate.
Any change in power delivery or sound is perceived as 'more power' by the guy who spent the money and/or did the labor. Real changes should be verified using controlled experiments. Corrected dyno, 0-60 times, unbiased tester, etc...
As for a minor (5 hp?) gain, your actual peak power can vary that much or more with the change in the weather between breakfast and lunch. It is very difficult to measure changes that small with an instrument as unreliable as the butt dyno.
IMO, reducing air velocity through the intake by hogging it out is rarely a good idea, unless you are correcting a known deficiency.
Polishing a surface to increase airflow has been pretty thoroughly debunked over the years, specifically for intake ports. Pretty sure the same physics apply in the intake tract.
But hey, it's fun to work on your truck and learn on your own, so props for that!
Any change in power delivery or sound is perceived as 'more power' by the guy who spent the money and/or did the labor. Real changes should be verified using controlled experiments. Corrected dyno, 0-60 times, unbiased tester, etc...
As for a minor (5 hp?) gain, your actual peak power can vary that much or more with the change in the weather between breakfast and lunch. It is very difficult to measure changes that small with an instrument as unreliable as the butt dyno.
IMO, reducing air velocity through the intake by hogging it out is rarely a good idea, unless you are correcting a known deficiency.
Polishing a surface to increase airflow has been pretty thoroughly debunked over the years, specifically for intake ports. Pretty sure the same physics apply in the intake tract.
But hey, it's fun to work on your truck and learn on your own, so props for that!
Last edited by Raptor05121; Jun 25, 2009 at 07:23 PM.
Senior Member
Joined: Sep 2007
Posts: 3,688
Likes: 28
From: The Barbary Coast
I concur. If you search the old threads, you'll see that Alex has taken all sorts of abuse from everyone here; for just about anything you can imagine, and some things you can't imagine. It's time we leave the kid alone. We've already had enough laughs at his expense. Just search the old threads.
Derek, if I can find one, i'll do it for ya in swap for some shackles! i was just thinking how I spent $20 on sanding wheels only to use them once. maybe it looks like i'll be able to use them again! do you have a spare or access to a spare? at the moment my local JY has nothing but tritons. and you say a tuner will fix the idle issue? cause if i did it exactly like i did mine i think you might have an idle issue. but i think i know what is wrong with mine, so im going to go outside and see if i cant fix it. but if you come across a 4.2L TB let me know and i can do it.
Senior Member
Joined: Aug 1999
Posts: 1,506
Likes: 0
From: Bakersfield, CA, USA
I concur. If you search the old threads, you'll see that Alex has taken all sorts of abuse from everyone here; for just about anything you can imagine, and some things you can't imagine. It's time we leave the kid alone. We've already had enough laughs at his expense. Just search the old threads.
This is the internet. It's better when it's entertaining.
And if someone posts inacurrate information or uninformed opinions in an open forum, they should be called out on it, IMO. That's how people learn.
BTW, if a post is truly abusive, report it to a moderator.
Senior Member
Joined: Jan 2009
Posts: 10,731
Likes: 47
From: Concord, NC
It's not meant to be a tattle type thing, but honestly, it really isn't just the internet. Respect others just like the way you would in person. I see this too much and it kind of bothers me. I got the same thing when I messed up painting my chassis a week or two ago. It's needless gripes that are intended to provoke a response. I understand that there is usually no harm, but there are jokes and then there are comments that are used to create a sense of shame or such on the OP or the directed of the comment. Sometimes I see these comments and it reminds me of the playground in elementary school. I know where you are coming from DDD, but it still doesn't make rude comments right.
John
John
Senior Member
Joined: Jul 2008
Posts: 968
Likes: 1
From: Upstate NY
That is the theory, but I've seen parties with advanced knowledge report that a shiny surface does little if anything to promote air flow.
Basically, there is a 'boundry layer' - a thin area of turbulent air near the surface, and it matters not whether the surface is polished smooth or not.
Bottom line is it may not be worth the trouble to polish.
Basically, there is a 'boundry layer' - a thin area of turbulent air near the surface, and it matters not whether the surface is polished smooth or not.
Bottom line is it may not be worth the trouble to polish.
That's why golf ***** have dimples! Now that would be interesting to see, a TB with dimples like a golf ball on the inside.