Smog Pump
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Hell, there's SOTP improvements that will actually cost you horsepower. I think the point here is SOTP feeling has no significance whatsoever. It's usually mostly psychological and based on how much money or time was spent on it. For proof, post a poll and ask people if their car 'felt' faster after an oil change.
I replaced some ignition parts on my vette, and it 'felt' slower at the track, I was worried there was something wrong with the car thought I'd head home, until I saw the timeslip, and it was my best run to date.
I replaced some ignition parts on my vette, and it 'felt' slower at the track, I was worried there was something wrong with the car thought I'd head home, until I saw the timeslip, and it was my best run to date.
Last edited by CentralCoaster; Apr 12, 2006 at 01:05 AM.
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Originally Posted by plumberh2o
How much extra horse power does the smog pump steel?
Will I notice the difference without it?
Plumberh2o
Will I notice the difference without it?
Plumberh2o
You can gut it so it will free wheel, and it will still be there if you have a visual emissions check in your state
Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
Originally Posted by CMYC4GO
I don't know about seat of the pants difference, but the air pump supposedly draws 7% of your engine's power.
You can gut it so it will free wheel, and it will still be there if you have a visual emissions check in your state
You can gut it so it will free wheel, and it will still be there if you have a visual emissions check in your state
How could a smog pump steal 14 HP on a motor that make 200 HP and Rob 49 HP from one that makes 700 HP.
Percentages only work with Compression and Cold air calculations.
Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
Wouldn't be better to say it robs 14 HP at 5200 and 17 at 6000 and have the facts backed up on a dyno?
Please don't use these #'s they are not fact just an example.
I just hope someone has done a dyno comparison.
Please don't use these #'s they are not fact just an example.
I just hope someone has done a dyno comparison.
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Originally Posted by Gold1986Vette420
Putting a percentage on anything is nonsense as far as accesories go.
How could a smog pump steal 14 HP on a motor that make 200 HP and Rob 49 HP from one that makes 700 HP.
Percentages only work with Compression and Cold air calculations.
How could a smog pump steal 14 HP on a motor that make 200 HP and Rob 49 HP from one that makes 700 HP.
Percentages only work with Compression and Cold air calculations.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Gold1986Vette420
Actually I said it was a .29 off my best time and 3.5+ mph
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by CentralCoaster
I think the point here is SOTP feeling has no significance whatsoever. It's usually mostly psychological and based on how much money or time was spent on it. For proof, post a poll and ask people if their car 'felt' faster after an oil change.
That is all I was trying to say.
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by CMYC4GO
I don't even remember where I heard that, or read it. Who cares? I was just passing along possibly/probably inaccurate second hand info, hence, the insertion of the word supposedly
" Doesn't excuse irresponsible posting. But at least you got to see your name in print.RACE ON!!!
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Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
Originally Posted by CFI-EFI
Yes you did. I cannot explain where the .07 came from. Maybe I was dropping off to sleep. That is an amazing improvement for just locking a converter. At what point do you hit the switch? Just as you're staging, so it will lock immediately in 2nd gear?
RACE ON!!!
RACE ON!!!
Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
Originally Posted by CFI-EFI
There seems to be a lot if that going around. People read garbage like that and, like a myna bird, repeat it with ZERO knowledge of it's validity and with no concern or sense of responsibility toward spreading falsehoods. "supposedly " Doesn't excuse irresponsible posting. But at least you got to see your name in print.
RACE ON!!!
" Doesn't excuse irresponsible posting. But at least you got to see your name in print.RACE ON!!!
Dyno Sheets solve all disputes. But only when done on the same dyno and properly corrected.
Thread Starter
Pro
Joined: Oct 2001
Posts: 725
Likes: 0
From: Berlin Maryland
Originally Posted by Matt383
FWIT...
I installed a Breathless Performance delete on my "88 -Polished.
Really cleaned up the engine bay.
However (as I posted last Fall) I was experiencing some huge crankcase pressure at high RPM under Nitrous/drag race conditions.
So now I have a polished elim kit that I don't use. Interested?
Matt383
I installed a Breathless Performance delete on my "88 -Polished.
Really cleaned up the engine bay.
However (as I posted last Fall) I was experiencing some huge crankcase pressure at high RPM under Nitrous/drag race conditions.
So now I have a polished elim kit that I don't use. Interested?
Matt383
Ken
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
I have experimented with the lock up on my car. I tried locking and unlocking it in every gear possible. On my combination, it did not like it and I slowed down a tenth or two. Some cars do pick up quite a bit from it. It is definately worth experimenting. Do not lock the converter often on a car making over 500hp at the flywheel. The friction material available is only rated at 500 hp. My converter company claims nothing is out there that is rated higher.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Gold1986Vette420
Believe it or not I locked the converter right off the line in 1st. Yes it did lock in first.
RACE ON!!!
Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
maybe there was something wrong with my transmission but when I threw the toggle switch it locked up even in first gear. it unlocked anytime my foot was on the brake.
I would leave the line like this:
Foot Brake the transmission on the line, (brake on) turn the switch on, leave on the converter slippage. Within 1.5 seconds in first you could feel the converter locking up. It would pull the motor right down.
I would even lock it driving around town in low gear or any other for that matter and would practically idle up hills. Bog City.
I would leave the line like this:
Foot Brake the transmission on the line, (brake on) turn the switch on, leave on the converter slippage. Within 1.5 seconds in first you could feel the converter locking up. It would pull the motor right down.
I would even lock it driving around town in low gear or any other for that matter and would practically idle up hills. Bog City.
Race Director
Joined: Jun 2004
Posts: 13,944
Likes: 705
From: WI
"The difference I feel is one less PIA when I have to work on anything, that was worth it to me."
I got an AIR delete awhile back. I didn't and wouldn't pay $170. That's
! Find one used or make your own. 
I got an AIR delete awhile back. I didn't and wouldn't pay $170. That's
! Find one used or make your own.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
I got an AIR delete awhile back. I didn't and wouldn't pay $170. That's ! Find one used or make your own.
! Find one used or make your own.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Gold1986Vette420
I would leave the line like this:
Foot Brake the transmission on the line, (brake on) turn the switch on, leave on the converter slippage. Within 1.5 seconds in first you could feel the converter locking up. It would pull the motor right down.
Foot Brake the transmission on the line, (brake on) turn the switch on, leave on the converter slippage. Within 1.5 seconds in first you could feel the converter locking up. It would pull the motor right down.
RACE ON!!!
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
Different years, makes, and models used different wiring arrangements to lock up the converter. Probably 20 or more viariations I have not seen any that locked up the converter in 1st or second gear. I "think" that one or 2 versions would allow for a possible 2nd gear lock up. I will look into it. I "think" factory first gear lock up would be totally out of the question. I will research both possibilities. I have tried to lock up 1st with a jumper harness for track testing and it did make the car lug and stall out. Most guys I have met (that claim to gain from locking t/c)seem to lock the converter at the 1000 ft mark or so. Usually around 100 mph assuming a 115-120 mph trap speed. The guys on TGO (in the diy prom section) have experimented a bit with this. I do plan to try it again on my car to see if it responds.
CFI_EFI is correct in how it applies. The ecm commands it based on the programming in the chip. Then the hydraulic circuit in the valve body trips a switch to finish the job.
CFI_EFI is correct in how it applies. The ecm commands it based on the programming in the chip. Then the hydraulic circuit in the valve body trips a switch to finish the job.
Last edited by Pete K; Apr 24, 2006 at 11:52 AM.