223 RWHP DynoJet NA 4th gear
#101
Registered
iTrader: (1)
I think people run their engines up to the indicated 9500 RPM because they've seen this video too much LOL ....
http://www.youtube.com/watch?v=21HwiUsEmLU
Awesome video, and yet most of it is filled with the rev limiter buzzer...
http://www.youtube.com/watch?v=21HwiUsEmLU
Awesome video, and yet most of it is filled with the rev limiter buzzer...
#106
Registered
iTrader: (3)
Funny --i havent had any difference in low speed operation since i deleted mine?
If anyone is looking to maximize air flow in the lim--then removal of the jet air would something to consider.
And if yall think I am ****--you should see what i did to the VDI!!
Some more useless information
Today i got a oem scale maf reading of 334 grams/sec at 6989 rpm and 181.18 load with 9lb boost.
Thats with a stock header--no cat.
I'm happy , happy, happy.
OD
If anyone is looking to maximize air flow in the lim--then removal of the jet air would something to consider.
And if yall think I am ****--you should see what i did to the VDI!!
Some more useless information
Today i got a oem scale maf reading of 334 grams/sec at 6989 rpm and 181.18 load with 9lb boost.
Thats with a stock header--no cat.
I'm happy , happy, happy.
OD
#107
Bigus Rotus
iTrader: (3)
Funny --i havent had any difference in low speed operation since i deleted mine?
If anyone is looking to maximize air flow in the lim--then removal of the jet air would something to consider.
And if yall think I am ****--you should see what i did to the VDI!!
Some more useless information
Today i got a oem scale maf reading of 334 grams/sec at 6989 rpm and 181.18 load with 9lb boost.
Thats with a stock header--no cat.
I'm happy , happy, happy.
OD
If anyone is looking to maximize air flow in the lim--then removal of the jet air would something to consider.
And if yall think I am ****--you should see what i did to the VDI!!
Some more useless information
Today i got a oem scale maf reading of 334 grams/sec at 6989 rpm and 181.18 load with 9lb boost.
Thats with a stock header--no cat.
I'm happy , happy, happy.
OD
Did Eric delete his in his quest for hidden power?
#108
Registered
iTrader: (3)
i believe he did. On his later cars. I could be wrong because if I am not mistaken no lim intake modifications where allowed. I told him to cheat
He knows better![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Its my understanding and I may be mistaken but the jet air only assits flow during idle and low rpm. Once the rpms are up it does nothing?
OD
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Its my understanding and I may be mistaken but the jet air only assits flow during idle and low rpm. Once the rpms are up it does nothing?
OD
#109
Registered
iTrader: (25)
Yes, again it is only a low engine speed economy/emission feature, but also again there's not really anything to gain performance wise by messing with it
so, you put a phenolic gasket between the engine and the LIM, but have no heat shield between the exhaust manifold and LIM? OK, then ......
so, you put a phenolic gasket between the engine and the LIM, but have no heat shield between the exhaust manifold and LIM? OK, then ......
#110
Registered
Thread Starter
![IN](https://www.rx8club.com/images/icons/in.jpg)
Never played with it. I have always wondered if removal would just give air flow a tiny bit more cfm at higher rpms. I suspect it is so small and only two runners out of the total runners that it would be hard to measure.
The increased air flow at low(er) rpms to help atomize the wet injector squirts on the intake man wall makes sense. Smarter guys than me on this forum better equipped to talk about it.
No wait. Time for some fun. "I, state your name, have seen 42 hp increase with the removal of these two hollow hockey stick thingees. Therefore there is 21 hp per thingee and if you put 4 extra thingees on there and took them off you would have 21 x 6 or 126 additional hp!".
Time to go surf the "will if fit thread" and look for technical breakthroughs. Hope all is well everyone. Been busy building new cars and prepping for 2010 race season.
-E
The increased air flow at low(er) rpms to help atomize the wet injector squirts on the intake man wall makes sense. Smarter guys than me on this forum better equipped to talk about it.
No wait. Time for some fun. "I, state your name, have seen 42 hp increase with the removal of these two hollow hockey stick thingees. Therefore there is 21 hp per thingee and if you put 4 extra thingees on there and took them off you would have 21 x 6 or 126 additional hp!".
Time to go surf the "will if fit thread" and look for technical breakthroughs. Hope all is well everyone. Been busy building new cars and prepping for 2010 race season.
-E
#112
hakuna matata!
iTrader: (41)
No wait. Time for some fun. "I, state your name, have seen 42 hp increase with the removal of these two hollow hockey stick thingees. Therefore there is 21 hp per thingee and if you put 4 extra thingees on there and took them off you would have 21 x 6 or 126 additional hp!".
![Cwm27](https://www.rx8club.com/images/smilies/cwm27.gif)
#113
Bigus Rotus
iTrader: (3)
In researching what it does...
I'm just confused on the direction - why is my brain not functioning?
Improvement of the fuel flow rate and the exhaust gas emission at idling requires stable transportation of small amounts of injected fuel to spark plugs. We designed a jet air/fuel mixing system in a way that jet air was sprayed from a pipe (port air bleed) to the bottom face of the primary intake port (anti-wet port), which created an upward and accelerated air flow. The high velocity air stream prevents fuel from wetting the intake port wall and facilitates vaporization and mixing of the air and fuel. (See Fig.18)
I'm just confused on the direction - why is my brain not functioning?
#116
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iTrader: (3)
I have never seen it DO anything. has anyone else? I know what the manuals say....
Increased high speed flow with removal ----well it cant hurt.?
did I really need to grind down some of those internal casting marks inside the runners----well it cant hurt?
did i need to seal the vdi with jb wield and open that chamber up a little and put more overall smoothness in it-----well it cant hurt .
Wish I had a flow bench to play with. I am sure it does flow a little better. Its something to play with when you have the lim already off.
And just think of the weight savings!
I did lose one of those dang vacuum lines and it helped to clean it up some, so did the deleting of the vdi( my redline is now at 7.5K)
I can get to my fuel injectors a lot more easily now.
I have pics of my intake posted somewhere
Increased high speed flow with removal ----well it cant hurt.?
did I really need to grind down some of those internal casting marks inside the runners----well it cant hurt?
did i need to seal the vdi with jb wield and open that chamber up a little and put more overall smoothness in it-----well it cant hurt .
Wish I had a flow bench to play with. I am sure it does flow a little better. Its something to play with when you have the lim already off.
And just think of the weight savings!
I did lose one of those dang vacuum lines and it helped to clean it up some, so did the deleting of the vdi( my redline is now at 7.5K)
I can get to my fuel injectors a lot more easily now.
I have pics of my intake posted somewhere
![Confused](https://www.rx8club.com/images/smilies/confused.gif)
#118
Registered
iTrader: (2)
Please people, do not remove the jets. Why risk your safety for a hundredth of a horsepower? FC's had a notorious problem of the fuel pulsation dampener membrane going bad, thus leaking fuel onto the intake manifold, which leaks onto the exhaust manifold, causing a fire.
Don't be another statistic for some stupid "modification".
Don't be another statistic for some stupid "modification".
#121
Registered
Thread Starter
RX8_DemonDevil48 told me that is why the fire comes out of the Greddy-Racing Beat Rising Sun super zoom tail pipe*
*Only approved for off-road use
#123
#124
Bigus Rotus
iTrader: (3)
The Jet-Air nozzles are really just a controlled vacuum "leak", which bypasses the throttle body but is still metered by the MAF sensor. At idle (which is 5-7 gms./sec. of airflow), there is sufficient airflow volume through the nozzles to blow any potentially puddling fuel droplets off of the intake runner floor. As the throttle body opens beyond the idle position the airflow is sufficient enough through the intake runners to blow the fuel off the floor, anyway.