Custom tune + custom SRI vs OEM intake box = interesting findings
Feb 9, 2011, 03:58 PM
#18
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I decided to prep my car for GST's V2 baseflash a couple days ago by swapping my custom SRI (Evo X MAF air flow tube + AEM dryflow filter) for the OEM intake box w/ my K&N panel filter. Keep in mind that I am running a custom tune based on GST's 91 Oct V1 baseflash w/ Boost Pill.
After swapping, I noticed the following things:
1. Acceleration seems to be more responsive.
2. The TC-SST isn't as notchy in 1st - 3rd gears at speeds less than 25 MPH.
3. Engine noise is significantly reduced. Which I expected anyway.
4. Fuel economy has lowered slightly.
Overall, the car actually "feels" better than it did by switching back to the OEM airbox using the K&N panel filter versus how it "felt" using the custom SRI.
Am I going crazy or is something like this expected?
I also wonder if my conical air filter choice has something to do with these results as well. Maybe the AEM dryflow is more restrictive than a K&N filter of the same type.
Any thoughts?
After swapping, I noticed the following things:
1. Acceleration seems to be more responsive.
2. The TC-SST isn't as notchy in 1st - 3rd gears at speeds less than 25 MPH.
3. Engine noise is significantly reduced. Which I expected anyway.
4. Fuel economy has lowered slightly.
Overall, the car actually "feels" better than it did by switching back to the OEM airbox using the K&N panel filter versus how it "felt" using the custom SRI.
Am I going crazy or is something like this expected?
I also wonder if my conical air filter choice has something to do with these results as well. Maybe the AEM dryflow is more restrictive than a K&N filter of the same type.
Any thoughts?
I went through like 6 different intakes on a previous turbocharged car (from aftermarket, to homegrown to a modded stock box) and after each change I'd swear it was better than the last, even if I went back to a previous one.
Generally speaking, hot air intakes stink in traffic (the throttle response with a hot intake is softer than stock) but the tradeoff was better response and power in all other situations. If you go with a hot air intake on a turbocharged car but don't want to hear your turbo and bpv, you made the wrong choice
Still, I love hearing the turbo and the bpv so the tradeoffs are worth it to me but YMMV
Feb 9, 2011, 03:58 PM
#19
I will never understand the motivation behind paying to upgrade one's stock airbox. The UR SRI isn't that expensive. Some of the drop-in filters are only a couple of dollars shy of the UR unit. I have a feeling that some of the old TTP posts about conical filters have made some of you shy away from them, altogether.
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