So I'm looking for advice on this intake mod. The car originally came with an air box that someone drilled a bunch of large holes in. I put the stock box back in after testing tank to tank and having my numbers lower.
Now that I have a guino I decided to re-test this ABA style.
Here's what the thing looks like modified:
Note that the snorkel below the air box has been absent since I've owned the car. It didn't come with it, and I can't seem to find a reason to go to the scrap yard and get one. This is up for debate. Can anyone tell my why I should use it?
Okay, so ABA.
Two types of driving. I feel like this mod could effect town or highway driving in different ways.
In town: 2 stop lights, so little room for error as possible. 3.1 miles.
Highway: 18 mile loop, there and back- No choice really, it's the closest exit that doesn't involve a toll and is more than 2 miles of interstate driving.
I pulled the ECU fuse between all tests.
The temperature dropped from 2df to -5df during testing. (approximately 3 hours at night)
The car was unloaded with the drum gear I carry about 1/2 of the time.
Test A, with STOCK intake.
Town: 50.95 mpg
Test B, DRILLED intake.
Test A second time, STOCK.
I equate the first low in town number to the fact that the car was warm but had cooled more than the other tests after it. There was maybe 20 more minutes between my trip to the grocery store and the beginning of testing. The needle was almost at warm.
Either way, it seems in town is well within my margin of error.
Highway, shows different results.
It looks like perhaps the temperature drop was effecting my testing. The numbers went down over the night.
What I noticed with the drilled intake:
The car gets on the highway MUCH easier. I can climb hills that used to require second gear now 4TH GEAR. It growls, but it will do it. In theory, this should be better. This extra oomph would be great with the added weight of my equipment in the back. However, I did notice that it CURRENT FE went down more quickly when getting on the interstate than before. It was easier to lose FE more quickly. OTOH, I noticed that FE numbers went up faster when cruising at highways speed.
These tests were done during a very cold evening. It's possible that numbers for the drilled intake might be better on a warmer day.
So, what do i do? It looks like things are pretty flat either way. I'm thinking I might as well put the drilled intake back on since the extra get up and go might help FE in the long term if I learn how to use it. (relearn shift points for my given routes)
What does everyone think?