Deckplate+ISR mod or cold air intake !BAD!

[Matthew Starr]

So last night i noticed something really crazy/weird. so i finally found a piece of 2 3/4" steel tubing yesterday and did the intake silencer removal (ISR). I already had done the deckplate mod and after doing a couple of tests last night i came to the conclusion that the deckplate mod and the ISR mod (doing cold air intake is almost the same thing) is actually a really bad idea. So i know how my 4runner responds and accelerates and i know that on certain roads in my area my 4runner can and can't do certain things.

With the ISR and deckplate done the very first thing I noticed was that it sounds like sh*t. The second, was that all my low and mid range torque pretty much disapeared. I was extremely disapointed so i got back on the high way to go home and put the silencer back on. But on my way home i have to get on this pretty steep uphill part of the highway. I then noticed that at 70mph my 4runner was having no problem accelerating up this hill, so i decided to put it to the floor to see what happens and (believe me I've tried to do this before and this has never happened) I HIT 108MPH. So i lost all my low and mid range power but gained a ton of high range power. So i got to thinking, I really have no need to go that fast, all I want is acceleration. But for sh*ts and giggles i thought id play around with this a little bit. Ok the number 1 thing about cars that i have no clue about is fuel. Octane to be specific. So i thought maybe throwing some premium in my runner (91 octane in Denver). DONT EVER DO THIS TO N/A 4RUNNERS. So after playing around a little bit I came to the conclusion that to truely get the most out of an intake modification you really need to get your exhaust done too. These to upgrades coupled together I bet is pretty amazing on a 4runner.

 

[beallen21]

the octane rating is the fuels resistance against pressure ignition and diesel fuel is rated by cetane which is it's willingness to ignite under pressure, unless you are running a higher compression engine or some type of forced induction 86 will usually cut it

 

[Matthew Starr]

the octane rating is the fuels resistance against pressure ignition and diesel fuel is rated by cetane which is it's willingness to ignite under pressure, unless you are running a higher compression engine or some type of forced induction 86 will usually cut it

thank you, thank you, thank you, thank you! I seriously always thought that octane was just some kind of chemical that fuel is made up of and the rating was how much of it is in the mix. That makes so much more sense now.

 

[p nut]

Regular is 85 for us up here in the high altitudes. I've never had problems with pinging and such with 85.

As far as the mod goes, it's like with any cold air intake or intake mods in general. You lose low and mid range power, but gain a little bit up top. Not worth it, IMO, especially in a truck that's mostly used in the lower rev range.

Good observation, though. That is the reason why I haven't bothered with either of those mods. Too much time and effort to spend on something that gets on little or no HP gain. Actually takes away some of the usable torque down low. No thanks.

 

[DavidAlexander]

Is this the same runner that was so bad you were going to do an engine swap? If so, what happened to the engine that was on it's way from Japan? Or what did you do to fix it up so well and so fast?

 

[Matthew Starr]

Is this the same runner that was so bad you were going to do an engine swap? If so, what happened to the engine that was on it's way from Japan? Or what did you do to fix it up so well and so fast?

yes its the same runner. well all in all i spent about $800 fixing some of the dumbass sh*t that was done to it. I got the 1gr like 3 weeks ago i think. because of the how hard the install looked like it was gonna be i started reading more about toyota engines and realized that the 5vz (3.4l) is a 10x better enginge so I put the 1gr on craigslist (Denver). The next day (this is where it gets weird) my friend toby calls me, I havent talked to, or seen him in like 2 years. He tells me he wants to hang out, go grab a beer, catch up with each other. Now the last time i saw toby he was a mechanic at a toyota dealership and had been for a while. So he shows up in a brand new 2008 toyota tacoma. I tell him his truck is awesome and he tells me ya but i wish i would've gotten the V6. hehehe. So i tell him "funny story, I have a 1gr + trans with 30k miles in my garage". Then I ask him, "do you still work at toyota?" he says "YA". so as it turns out i sold the motor+trans to him for a reasonable price and in turn hes getting me a brand new trd supercharger and some other stuff ill tell you all about later. Problem is he cant get the s/c till april cause they're on back order and technically toyota doesnt make em anymore.