Originally Posted by Jerry Bransford
Bree is a skank and Jp magazine never reviewed a product that advertised in their magazine they didn't love. Dyno tests can often be misleading and personally, I don't believe you really get power improvements on a TJ with aftermarket air intakes.
I agree^^ I have lost respect for JP magazine as far as engine tech goes in the last couple years. They are very biased and any product they feature they are getting swooned by the manufacturer so the test results are always positive. Even on products that have proven to be junk.
Check out their "ten proven power adders
" in the same issue. Look and notice that most are mods done to the "insane inline" XJ. Then flip to page 10 and read the letter regarding the "JR in hiding" and JP says they have the very same Jeep XJ at the shop putting the original engine back in due to "...the insane inline went poof for the second time in 20K miles...
" Now how in the world can you have your technical cover story recommending several upgrades that apparantly caused two engine failures?
I'll repeat the same thing I posted in last CAI thread-
All of the intakes in their "test" are reported to give an increase of approximately 10hp and 10 ftlbs of torque at peak
levels. Now this is the part they don't explain very well, but the RPM's that those numbers are acheived at peak
is nowwhere near the range that you will see during ordinary driving, unless you routinely take it to the redline between every shift! For normal driving I would guess you'd see 3-5 extra hp tops but most likely not even that high, and most folks couldn't even recognize that small of a difference.
The other thing to consider is all but one of those of those kits use cotton gauze filters elements like the K&N which have proven to do a very pooor job at actually filtering out dirt particles. The one that uses a paper element is the AEM, but that system doesn't even wall off the backside of the box from underhood engine heat, so it isn't a true cold-air setup.
And I'll repeat, Save your money for mods that really make a difference.
(And sometimes a skank will do in a pinch.