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I am running the BMS filter right now and like the fact that you use the quality factory MAF calibrated
CAI but I need to wait for some good air to see just how good this filter stacks up.
I had been using the AFE-1 cai running the gray 'low flow' filter with overall good results and as I have said before; I think there are more AFEs in the 9 second zone than Halltechs on this site. I also have a feeling that there are a lot more Halltechs on C7/Z06s than AFEs. If all this is so than I guess just fast guys know to run AFEs.
Check it out for yourself on the BMS site. In BMS's own testing the AFE with the 'low flow' gray filter put out more boost than the OEM set-up running the BMS filter at the 'same' 6000+ RPMs. That may not mean a thing.
'Sometimes' when an intake/filter produces more boost pressure the extra leaning may pull more timing/performance.
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Below is the OEM housing that I opened up as much as I could (twice) which really was not all the much. The reason I did this PITA thing is because a forum member (onfire) flowed tested the OEM set-up 'without' the tight air box around a "Green" air filter and picked up 30 CFMs in flow. I have always felt that the air box was a little to close to the filter.
Sup buddy long time no speak. I just got my first C7Z a few months ago (glad I waited)....
I have the Burger air filter which I haven't installed yet so unf I don't have any data for you however....theres enough members here (including some) that have tested the Burger filter against other cai systems and found it to be the best....
Sup buddy long time no speak. I just got my first C7Z a few months ago (glad I waited)....
I have the Burger air filter which I haven't installed yet so unf I don't have any data for you however....theres enough members here (including some) that have tested the Burger filter against other cai systems and found it to be the best....
The power gained from leaning out the AFR is across the board, but the gains from the reduction is restriction grow towards the higher end of the power band.
Till the ECU start to compensate???then you're SOL!??
Till the ECU start to compensate???then you're SOL!??
The long term fuel trim adjustment by the DME is fairly minor, there is some good data on it in another one of our threads. So you'll retain most of those AFR power gains. Regardless you still have a solid gain from the reduction of restriction and proportionally higher boost.
Sup buddy long time no speak. I just got my first C7Z a few months ago (glad I waited)....
I have the Burger air filter which I haven't installed yet so unf I don't have any data for you however....theres enough members here (including some) that have tested the Burger filter against other cai systems and found it to be the best....
either way, good luck
I bought mine over 2 and 1/2 years ago just bought my 2nd C7 z06 a 2017 to have both the M7 and the A8 Z06.
Both the BMS filter and the Halltech offer a improvement, the Halltech wins hands down if you want the best performance.
The Halltech offers 40 rwhp plus A8 or 50 rwhp on the M7.
Then expect better max air flow for headers and other mods.
The BMS filter expect about half.
If you want to keep the stock airbox. Expect to do little in mods.
Then I would stay with the BMS.
If you want the max gain you buy the Halltech CAI!
Went 1/8 mile drag racing Sunday. Cut my first "BMS" .000 perfect light & bye run. Received some money a few rounds later. Went home. End BMS Report
At my local track there are no longer any classes, everything runs against one another foot brake & electronics. It was a $5,000 dollar purse this Sunday and I was the "only" real street car (stuck out like a sore thumb) in the mix of dragsters, etc. You really have to be on your toes racing in this class. I see .00X reaction times being the norm in this class to win. $100 to run with $75 buy backs.
PS: I may/most likely will change my track to one that still run the classes when racing, i.e. foot brake, electronics, dragsters, etc. like Cecil County.
Last edited by C7/Z06 Man; 09-04-2017 at 03:09 PM.
Went to local track Sunday. Cut my first .000 perfect light & bye run with the BMS filter aboard. Then I received some money a few rounds later. Went home. End BMS Report
At my local track there are no longer any classes, everything runs against one another foot brake & electronics. It was a $5,000 dollar purse (1/8 mile race) this Sunday and I was the "only" real street car (stuck out like a sore thumb) in the mix of dragsters, etc. You really have to be on your toes racing in this class. I see .00X reaction times being the norm in this class $100 to run with $75 buy backs.
PS: I may/most likely will change my track to one that still run the classes when racing, i.e. foot brake, electronics, dragsters, etc. like Cecil raceway.
I got an awesome deal on used AFE CAI with the oiled filter only. I did searched a lot, and can't figure out if it will trigger CEL without a tune!!! Its getting confusing, should i give it a try?? my short term goal is TB ported and MAYBE a Xpipe. WITHOUT a tune!!!
I installed the BMS in my new 18 Z tonight, started raining so yet to give it a try. I have had the other intakes both with good power increases but not so good fitment. Looking forward to testing it out tomorrow.
If you are going to track it watch for the cel and reduced engine power. The re-calibration on these cars to correct the 2017 Z flaw was not done until August 18th, 2017 so ANY 2018 production prior to this has the 2017 tune. A big OOPS by GM!
I got an awesome deal on used AFE CAI with the oiled filter only. I did searched a lot, and can't figure out if it will trigger CEL without a tune!!! Its getting confusing, should i give it a try?? my short term goal is TB ported and MAYBE a Xpipe. WITHOUT a tune!!!
Give it a try. I have the AFE-1 CAI which came with both filters. I went with the blue oiled "high flow" filter at first (No CEL) but my stock tune car slowed down compared to running a "Green" replacement filter.
So I tried the AFE-1 Gray dry "low flow" filter (No CEL) and the car has ran it's best 1/4 mile passes to date.
NOTE: Sometimes when you install any intake due to unplugging the MAF sensor the car will set a light which requires a few ignition cycles to remove and maybe a hood opening/closing too, per Halltech.
Last edited by C7/Z06 Man; 09-08-2017 at 11:12 AM.
You are asking the wrong question on "Max CFM Flow Difference"... Generally the larger the intake/filter the higher the total CFM and the lower the restriction at very high CFMs... But, the CFM your motor requires depends effectively on its power level. It doesn't matter if you have less restriction at 1400cfm if your motor only requires 900cfm.
Our drop in filter and a full air intake are very close on power at least until the ~630whp levels we've tested so far (2.3" upper pulley, 30% E85). I'd love to see someone with 700whp do some back to back testing to evaluate.
How well does the BMS filter work on just an LT1? On your site the filter is listed for Z06, applicable (obviously) for all C7 models, and only show gains for a Z06. Are there any gains and is it worth the cost to put on a stock LT1?
If you are going to track it watch for the cel and reduced engine power. The re-calibration on these cars to correct the 2017 Z flaw was not done until August 18th, 2017 so ANY 2018 production prior to this has the 2017 tune. A big OOPS by GM!
I wonder if GM will download the 2018 calibration? My car has a July build date. Curious if anyone here has had it done? I may check with my service writer once this damn Hurricane blows over.
How well does the BMS filter work on just an LT1? On your site the filter is listed for Z06, applicable (obviously) for all C7 models, and only show gains for a Z06. Are there any gains and is it worth the cost to put on a stock LT1?
It works as well as any intake works for the LT1... Gains are not major but then again it's a cheap and easy to install modification.
09-02-2017, 09:59 PM
Ain't that the truth! 
$100 to run with $75 buy backs. 
