ISR vs Elbow Removal vs Deckplate mod?

[Skinfaxi]

First of all, the notion that NVH is was the primary design criteria for the intake on our 4Runners is absolutely absurd. This isn't a luxury car and 15 years ago trucks weren't expected to act like one.



Second, the resonator isn't the modification being discussed here. It's cutting a hole in the airbox, which hasn't been proven to do anything for power. I'd be willing to bet that if you run the numbers on the flow through the intake horn in the fender you'll find that there's absolutely no gains to be had there until you're well above the power levels we're talking about.

I didn't say NVH was the primary criteria, but it was major, or else they wouldn't have wasted their time with the expense of a resonator. The fact that it's there says everything. Some of this site's members think the delete sounds cool. Soccer moms who bought these things off the lot back in the day would have been annoyed by it. That's why most cars have one.

By the way, I think deck plate/resonator delete don't do anything worth the effort, which is why mine is stock. I was arguing the point you made about it being absurd to think that engineers leave easy power on the table. Just about every car in production does. In many cars, the resonator will make a difference. The 5VZ is so cold blooded that anything short of FI won't do anything.

 

[98OzarksRunner]

The 5VZ is so cold blooded that anything short of FI won't do anything.

I think this is the bottom line, and even that won't make it a race car. As I've said before, S/C a 3rd gen and my wife's 2.5L 4cyl RAV4 will still outrun it. It's not lipstick on a pig; it's lipstick on a brick.

 

[gamefreakgc]

You guys are taking this way too seriously. If someone wants to modify their intake, then let them.

For those of use who are supercharged, there are gains to be made since we are exceeding the stock flow. Same goes for the exhaust. Cars, especially Toyotas, do put in parts that are not the most efficient, there are gains to be had. Now on a Chevy Camaro or a Nissan Titan? Not so much, since those who buy them don't mind the extra noise for the extra HP and torque.

The question is, are the gains worth the effort? That's where the opinion comes in.

 

[willbgood]

Now, if you want to modify the intake on your truck, by all means have at it. As some of the others have mentioned they like the sound of it, and that's a perfectly acceptable reason to do it. I just don't like hearing about "proven dyno gains" when the evidence doesn't stack up. I would say there are very debatable dyno tests that point to the possibility of a small gain.

I am not an engineer, just an old Harley motor head. Am I wrong when I say you will see no real gains with an intake mod that does not also have a corollary exhaust mod, and in the case of fuel ejected engines I would also think you would need to reprogram the mapping adjusting stoich, wot, idle and start modes.

Of course all my major engine mods are on Harleys and usually they are to make it go faster in a straight line for a very short period of time, usually the shorter the period time, the better...

 

[Rock_Rat]

Am I wrong when I say you will see no real gains with an intake mod that does not also have a corollary exhaust mod, and in the case of fuel ejected engines I would also think you would need to reprogram the mapping adjusting stoich, wot, idle and start modes.

You're 100% correct in opening up the exhaust. I have an SC for mine sitting in the garage I stole from a guy off of CL for $700 with a brand new nose cone and the URD 7th injector. I've had it for almost a year now but I refuse to install it until I get headers, larger fuel injectors and new fuel pump at a minimum to support the SC. Opening up the exhaust is absolutely key. If I don't do that, I'll be replacing my engine in a very short time.

With the 5VZ it's not possible to throw a hi lift /low duration cam, with a torker mainifold, go 10 over and push out a 10.5:1 or better on the cylinders. We're pretty much stuck with stock. I've done the ISR mod and the Deck Plate mod just to try and "squeeeeek out" any HP I could get. Mild pedal response is about all I felt for a while. I think I'm going to be re-installing my ISR.

Old thread, but the ISR DeckPlate discussion always comes up.

 

[Tstinson]

After much contemplating, I finally decided to try the ISR mod considering the minimal cost, and, ease of reversal. The first few pumps of the pedal resulted in a little gargle and sputter but after a minute of cycling between idling and throttling, everything seemed to map out smoothly. Went on road test and immediately noticed more gargling and sputtering but this too quickly subsided. Then, All the sudden, I noticed a subtle, smooth rumble that was not there before. I thought that was it until I decided to punch it a bit more than the 25% throttle bursts I had previously given it. WOW! I can't say it sounds like a big block V8 or a supercharger with a header back replacement but all the sudden, my 4Runner sounds more like a truck rather than a family SUV with a whispy, quiet engine. It's certainly not loud by any measure and anywhere form idle to 25% throttle will sound very similar but if you're looking for a cheap mod that you can complete in less than an hour with a noticeable effect, this one is pretty fun!

 

[Scramble]

I think this is the bottom line, and even that won't make it a race car. As I've said before, S/C a 3rd gen and my wife's 2.5L 4cyl RAV4 will still outrun it. It's not lipstick on a pig; it's lipstick on a brick.

:reddance:
I'll race your wife in my non S/C 3RZ 5 speed. :reddance:

 

[ryanpavelchik]

Intake mods

Gadgetonline.com goes through the intake mods with funk numbers. But, those are with a supercharger.