increased throttle response mod
07-04-2006, 09:07 AM
#51
I wanna rock! Rock!
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Originally Posted by Spin9k
How much can a little plastic valve cost $5, $10? Or get a Pepboys alternative...is there any dif except physical size between them? I mean engine intake vacuum is pretty universal, yes, based on the atmospheric pressure?
I'm sure you could get a pep boys one to work though.
Also, intake vacuum depends on how much air the engine is pulling in. If it was universal then power output among engines would be universal
07-04-2006, 04:26 PM
#52
RXeighr--i got you covered man- I will see you at Barber. What I do is run a catch can with steel mesh in the bottom as a filter and just dont hook it to the in take.
To answer one guys question abou the other lines from the in take--one is to the power brakes an one is to the MOP. The one to the brakes--no problem understand that, but what purpose is the one to the MOp serves what purpose?
To those who wonder if this will "harm" the engine-- the answer is No. I have noticed a "little decrease in intown gas milage" not much but a little. No condensation on my oil stick and heck i use RP and change every 5K.
olddragger
To answer one guys question abou the other lines from the in take--one is to the power brakes an one is to the MOP. The one to the brakes--no problem understand that, but what purpose is the one to the MOp serves what purpose?
To those who wonder if this will "harm" the engine-- the answer is No. I have noticed a "little decrease in intown gas milage" not much but a little. No condensation on my oil stick and heck i use RP and change every 5K.
olddragger
07-04-2006, 05:53 PM
#53
Mine just runs much better all the way around. My car seems to have its own mind. I have been running a midpipe for a long time. Along with all the other mods. No CEL. Not sure on what kind of power I have. Runs like a dream now. No bad odors. I will make an in car video. Gotta hear this thing run.
For sures: TB bypass, breather above 90 degrees, any K&N intake, midpipe, flywheel, disk/pressure plate/, and a piggyback ECU like the Interceptor. The ECU is my last big mod and the weakest link in the chain. That will be plenty. When its a second car it will see FI at full tilt.
I think that it is safe to say this car has pre-ignition issue's in high temps. Elevation may be an element too. Just don't know. There are just so many mixed results. Prime example me. No CEL with midpipe and no bad smell? The RX8 is an unconventional car in a conventional world. It should fall under motorcycle inspection criteria. The ECU learns as it goes, so there is no tellin. Thats why I am getting that ECU. I want to know and make my own corrections.
And I quote Forest Gump "And that's all I got say about that".
For sures: TB bypass, breather above 90 degrees, any K&N intake, midpipe, flywheel, disk/pressure plate/, and a piggyback ECU like the Interceptor. The ECU is my last big mod and the weakest link in the chain. That will be plenty. When its a second car it will see FI at full tilt.
I think that it is safe to say this car has pre-ignition issue's in high temps. Elevation may be an element too. Just don't know. There are just so many mixed results. Prime example me. No CEL with midpipe and no bad smell? The RX8 is an unconventional car in a conventional world. It should fall under motorcycle inspection criteria. The ECU learns as it goes, so there is no tellin. Thats why I am getting that ECU. I want to know and make my own corrections.
And I quote Forest Gump "And that's all I got say about that".
07-04-2006, 06:01 PM
#54
Not to mention, the oil needs to stay in the sump. You will overheat the car when oil levels get close to the 1/4 mark or just above low. A quart of oil will make a huge difference on engine temps. It will happen quick if your car is burning and burping a 3.75 quart sump.
07-04-2006, 06:26 PM
#55
always preoccupied.
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Originally Posted by Spin9k
How much can a little plastic valve cost $5, $10? Or get a Pepboys alternative...is there any dif except physical size between them? I mean engine intake vacuum is pretty universal, yes, based on the atmospheric pressure?
When I had to replace the pulsation dampener on my rx7 I wanted a brand new one, not used and not plugged with a banjo bolt (cheap/stupid way to "fix" it). That little bolt with a tiny diaphragm in it cost 135 dollars.
07-04-2006, 06:51 PM
#56
I just did mine today.
I used a small K&N Filter.
Did the throttle bypass using a polyethelene barbed connector tube.
Looked for a ball bearing but couldn't find one. I was thinking about using a scree in the throttle plate to block the flow. But then I thought if there is a way, water will find a path around the cap and to the throttle body.
I used a small K&N Filter.
Did the throttle bypass using a polyethelene barbed connector tube.
Looked for a ball bearing but couldn't find one. I was thinking about using a scree in the throttle plate to block the flow. But then I thought if there is a way, water will find a path around the cap and to the throttle body.
07-05-2006, 09:39 AM
#58
Originally Posted by KJ238
If you have an oil catch tank, would u still need a breather?..
if your 8's intake is sucking in oil... then you have these 2 options - catch can or breather. both solutions will eliminate the oil problem. the only difference b/w these 2 mods is the following:
CATCH CAN:
-will not allow the intake to suck oil by collecing the oil out of the vacuum hoses before they enter the intake.
BREATHER:
-will not allow the intake to suck oil by eliminating the vacuum hose completely.
the consensus is still out on the breather mod... but, so far all the evidence points to it being a better mod than the can b/c it elminates the oil issue AND provides a nice throttle improvement...
the ONLY drawback of the breather mod is the environmental pollution...
07-05-2006, 10:04 AM
#60
PCV valves are designed to work under limited vacuum levels. What we would need in order to add our own if the car doesn't have one is a valve designed for 15-17 in/hg at idle. PCV valves are also designed to flow in one direction only. Don't install it backwards. BTW, engines that have similar vacuum levels in no way are assumed to have similar power levels. Vacuum indicates the relationship between a given engine's displacement vs. the intake and exhaust system's flow characteristics.
Last edited by Charles R. Hill; 07-06-2006 at 04:05 PM.
07-06-2006, 11:49 AM
#62
Momentum Keeps Me Going
Here's my version of this. Used a Pepbois brake bleeding kit bottle. Already setup for this - two holes in top, one w/a tube going near the bottom, right angle adapters included (as shown). Just add a bit of ss brillo, a few inches of 3/8 tube and a pvc pipe hanger attached to the air pump housing bolt. Fits right in... total time to completion...about 20 min - Voila!
Thanx olddragger
Thanx olddragger
07-06-2006, 04:25 PM
#65
Momentum Keeps Me Going
Originally Posted by expo1
What does the brillo do?
07-06-2006, 04:42 PM
#68
Momentum Keeps Me Going
Originally Posted by my10ae
Spin:
Care to make up a few of these for fellow area 8 owners? :P
Care to make up a few of these for fellow area 8 owners? :P
Last edited by Spin9k; 07-06-2006 at 04:45 PM.
07-06-2006, 09:47 PM
#70
I think a better example to illustrate how the steel wool/Brillo works is to look at a kitchen vent filter. They are steel and made to trap grease and oil. They are also reuseable and non-flammable.
07-07-2006, 07:30 AM
#72
Metatron
iTrader: (1)
Caution....
Just a word of caution before everyone rushes to do this -
The stock system is downstream of the filter, if the engine conditions ever change to the point where the flow is INTO the engine instead of OUT, you will be sucking road dirt up.
S
The stock system is downstream of the filter, if the engine conditions ever change to the point where the flow is INTO the engine instead of OUT, you will be sucking road dirt up.
S
07-07-2006, 10:27 AM
#73
never had that problem with the old recip engines Stealth. Dont know about the rotary for sure but wouldnt anticipate that occuring. Good thought though. Easy to add a small screen to downdraft tube if that is a concern.
Repeat question " Does anyone know why a tube runs from the intake to the MOP???"
Olddragger
Repeat question " Does anyone know why a tube runs from the intake to the MOP???"
Olddragger
07-07-2006, 11:46 AM
#74
That tube from the intake to the MOP may be a vaccum sensor to detect load and add more MOP pressure accordingly. Sometimes these RX-8's are not as sophisticated as we might think. Remember our conversation on that, OD?
