Times thru the stock airbox.

[Turbo6Smackdown]

Is it possible to net high 12 et's thru the stock airbox and maf pipe?

 

[Boost231]

I would like to know this as well.

 

[jurassic five 7]

Send me your stock air box, i'll through it on my car and we'll find out!

-Adam

 

[karst#9]

It's possible to go in the 11's with a stock air box and maf. I read this a few years ago. UNGN White 86 T-type top of page.

http://ungn.powerwheelscd.com/g-bodyhome.html

 

[A2000RICH]

guys---------i can absolutely answer this as yes because i have done low 12's with the stock box as far back as mid 90's------- a few thoughts------look at the times posted in the GNX book for initial tests------i think it was low 13's back in 86------those cars were not very modified and had slippery gatorbacks---------that would almost guarantee you could go high 12's if you did little else------say good tires, larger turbo, fuel pump and 36 lb injectors--------if you want to do it i can give you some advice---------99.99999% of the world is gonna not believe me but its true nonetheless---------the stock AC delco air filter will outflow the K&N that fits the stock airbox--------i would not have believed it but about 4 years ago trey crease (used to own 0 to 60) and pete hoffman (presently works for dennis kirban) were visiting me in NC at my shop to rebuild their transmissions---------trey had been talking to some of the folks at gm about some performance product being developed in the cadillac division (probably the CTSV) and the subject of air cleaners came up--------trey said that the gm folks said that they tried a K&N unit and it didn't do as well as the AC unit--------i remember we were at lunch and i said that was ridiculous--------i couldn't wait to get back to the shop and show trey how wrong that had to be---------i have a couple Superflow flow benches ----a 600 and a 1200---------i fabricated a few fixtures to attach a stock GM air box to the 600 and started the tests-------it was immediately obvious that the AC outflowed the K&N by quite a bit---------undaunted i went to the shelf and got another K&N right out of the box-------i tried it unoiled with similar results-------i carefully oiled it and got slightly different but similar results----------i went and got another AC unit and it still outflowed the K&N's---------i went to one of my really mint GN's with less than 10 miles and removed a "vintage" 87 filter and got similar results--------- i did the tests and still have trouble believing it-------good thing i didn't bet money cause i would have bet big money on the outcome of this test------talk to pete hoffman at kirban performance---------he was a witness and wrote down the actual flow numbers---------my best recollection is the the K&N flowed about 10% less than the AC with the same pressure drop--------while we were at it we tried a fram and all i can say is "if you want to jam it fram it"----------want another "believe it or not"????---------the stock airbox actually flows better with that silly looking duct in place------yea, the one that attaches to the box and pokes through the radiator support-------memory says that snorkle looking thing improved things about 5%----------anyone want to see this for themselves please feel free to stop by...............RC

 

[Boost231]

[wow thats awsome.

 

[graza002]

Nice write up!!!!

 

[forcefed3.8's]

I went 12.5's@106 with a stock air box hot air, and 125mph with a stock inlet hose.

 

[Turbo6Smackdown]

outstanding...my engine bay is going to make soo many people mad, its not even going to be funny.

 

[Jerryl]

guys---------i can absolutely answer this as yes because i have done low 12's with the stock box as far back as mid 90's------- a few thoughts------look at the times posted in the GNX book for initial tests------i think it was low 13's back in 86------those cars were not very modified and had slippery gatorbacks---------that would almost guarantee you could go high 12's if you did little else------say good tires, larger turbo, fuel pump and 36 lb injectors--------if you want to do it i can give you some advice---------99.99999% of the world is gonna not believe me but its true nonetheless---------the stock AC delco air filter will outflow the K&N that fits the stock airbox--------i would not have believed it but about 4 years ago trey crease (used to own 0 to 60) and pete hoffman (presently works for dennis kirban) were visiting me in NC at my shop to rebuild their transmissions---------trey had been talking to some of the folks at gm about some performance product being developed in the cadillac division (probably the CTSV) and the subject of air cleaners came up--------trey said that the gm folks said that they tried a K&N unit and it didn't do as well as the AC unit--------i remember we were at lunch and i said that was ridiculous--------i couldn't wait to get back to the shop and show trey how wrong that had to be---------i have a couple Superflow flow benches ----a 600 and a 1200---------i fabricated a few fixtures to attach a stock GM air box to the 600 and started the tests-------it was immediately obvious that the AC outflowed the K&N by quite a bit---------undaunted i went to the shelf and got another K&N right out of the box-------i tried it unoiled with similar results-------i carefully oiled it and got slightly different but similar results----------i went and got another AC unit and it still outflowed the K&N's---------i went to one of my really mint GN's with less than 10 miles and removed a "vintage" 87 filter and got similar results--------- i did the tests and still have trouble believing it-------good thing i didn't bet money cause i would have bet big money on the outcome of this test------talk to pete hoffman at kirban performance---------he was a witness and wrote down the actual flow numbers---------my best recollection is the the K&N flowed about 10% less than the AC with the same pressure drop--------while we were at it we tried a fram and all i can say is "if you want to jam it fram it"----------want another "believe it or not"????---------the stock airbox actually flows better with that silly looking duct in place------yea, the one that attaches to the box and pokes through the radiator support-------memory says that snorkle looking thing improved things about 5%----------anyone want to see this for themselves please feel free to stop by...............RC

Richard,

I have a chance to read a few of your post and your research, correlation, real life results and the presence of data are impressive.
It is enlightening to see someone actually share some in-depth data.

A while back when I asked the “stock air filter set-up” question, no one was able and/or willing to share the data and results. This is enlightening to say the least. :biggrin:

Thank you for your continual sharing the knowledge and experiences!

 

[bison]

Its been mid 120's on some of the classes that require it. Not sure if it had holes drilled in the bottom though.

 

[the wrath]

richard i wanted to know how well kirbans aluminum plate the uncovers the bottom of the airbox would flow with all 3 filters . and i didnt understand what you ment about if you want to jam it fram it does that mean that it didnt do well in the test.

 

[A2000RICH]

richard i wanted to know how well kirbans aluminum plate the uncovers the bottom of the airbox would flow with all 3 filters . and i didnt understand what you ment about if you want to jam it fram it does that mean that it didnt do well in the test.

the difference between the AC and K&N was small compared to the fram that scored a distant 3rd--------i expected the K&N to really score a strong first place ------i'll try to look that data up and actually post it---------i did everything--------with & w/o snorkel, air box with and without holes in bottom section, with filters and without, elbow, maf with two screens, one and none, stock air hose with and without bend, factory turbo bell with and without breather hole-----every little change is measurable------even the air temp sensor in the elbow is measurable-------you should see the difference the bend makes in the flex pipe-----------it was really an eye opener----------but i never thought to do the Kirban "plate"---------i have one somewhere and i will give it a try...................RC

 

[the wrath]

has anyone run the stock airbox with a lt1 or ls1 maf if so how did they get the sensor to connect to it

 

[DR BOOST]

---------the stock AC delco air filter will outflow the K&N that fits the stock airbox--------QUOTE]


i was stunned when i read this until i reread this important line. the K&N tested is not the cone filter that 99% of us use. that is an important bit of info that may be overlooked.

 

[Junior Samples]

---------the stock AC delco air filter will outflow the K&N that fits the stock airbox--------QUOTE]

i was stunned when i read this until i reread this important line. the K&N tested is not the cone filter that 99% of us use. that is an important bit of info that may be overlooked.

86 t-type "Granny" with a few bolt ons, few weld ons, a few JB weld ons and a weldon pump<--------------------------------------LOL as long as you dont order your steak weldon..lol

 

[A2000RICH]

---------the stock AC delco air filter will outflow the K&N that fits the stock airbox--------QUOTE]


i was stunned when i read this until i reread this important line. the K&N tested is not the cone filter that 99% of us use. that is an important bit of info that may be overlooked.

if that had happened i would not be able to post about it------i would be dead from a heart attack caused by total disbelief of everything-------even so you got to admit what i said is hard to accept-------i am reasonably confident that is not the case with the other stock location K&N filters on the market but how did they let the one for the GN slip by the testing dept---------were they just so confident about the results that they didn't do any comparison tests------in the last 20 years they have probably sold nearly one for every GN-------i don't think it fits anything else?????now that i think about it the in store tester that is so impressive always has a fram for a comparison-------anybody else seen the point of sale demo with the fan and the two filters with the floating ball??????------kinda makes me wonder????????????and makes me want to do some more testing---------this may not be as much agout K&N as it is about fram.................RC

 

[salvageV6]

This is the setup I was referring to. :smile:

http://www.turbobuick.com/forums/ge...-stock-appearing-intake.html?highlight=airbox

From a while back.

 

[Turbo1dr]

now that i think about it the in store tester that is so impressive always has a fram for a comparison-------anybody else seen the point of sale demo with the fan and the two filters with the floating ball??????------kinda makes me wonder????????????and makes me want to do some more testing---------this may not be as much agout K&N as it is about fram.................RC

I have seen one of those testers you speak of...

 

[Phoff]

I still have all the Data...I just have to find it......We did it on July 4th 2004....the most restrictive part of the STOCK intake tract was NOT the airbox....it was the stock inlet bell......We started with the inlet bell and then added the flex hose ect. until we had the complete airbox attached....I even have a few pictures of Richard doing the test...I will post them....

Pete
Kirbans