MAXEJA

i am looking to do some simple modification to increase horsepower, I have been told the first thing to do is replace the sparkplugs with some better ones and get thicker wiring. Where would i buy this and what types or brands would i be looking at. Also what are other simple mods like that which would yeild small hp gains but when all added up would make and impact. Maybe something with the ignition. I am also looking to get the 60K tune up, would i just tellt he people doing that to upgrade the plugs and wires or would i be ripped off? thanks eric

krzymax

iTrader: (2)

hey, some simple mods that you could do before the sparkplugs and thicker wire could be your airfilter. get something like a K&N cone air filter. it'll give you about 5+ hp. i can tell you it's much better than the stock air filter in our maximas. then try to go for the y-pipe and the cat back system. those would give you some good hp too. i'm a newbie as well, so i could be wrong. but from what i hear, those would be some good starters... but hey, i would recommend the bosch sparkplugs. have fun.

MAXEJA

i have a CAI and i have on the way a greddy catback system. y pipe will be for next year, but im pretty much lookin for simple things that will not hurt the engine and i can do within my budget. thanks for you input.

Sonic

We don't have changable spark plug wires.

guido_sst

Changing your sparkplug wires is not possible on a 4th gen, we have coil on plug ignition, our "sparkplug wires" are the thick black things on top of your engine and should last the life of the car.

Bosch spark plugs are probably a bad idea too, people (myself included) have had problems with them, stick with the stock NGK plugs and you'll be better off.

SLC I30t

iTrader: (1)

So let me ask this because I can't read between the lines...at all, I wear glasses and stuff.
We cannot, change out our plug wires? I've seen some at Autozone (if I remember correctly) they weren't cheap but they said that it was compatable. Why do you suggest not using other plugs? My car came with Bosch from the factory(infiniti). I'm just wondering why, I've been told to use colder plugs when I switch to NOS (i don't understand that either)... please help.

cerumo

iTrader: (2)

bosch sparkplugs give you problems? Can you explain why?
I was gonna change mine with bosch with the next tune up

Daniel B. Martin

You cannot replace the spark plug wires on your engine because it doesn't have any spark plug wires.

The VQ30DE engine uses coil-on-plug direct ignition. Each cylinder has its own ignition coil. The coil is packaged "in the hole" with the spark plug. There is no need for a wire to connect them because they are in direct physical contact. This modern design eliminates the need for a distributor. You will never need to replace a distributor cap or rotor for the same reason... your engine doesn't have those parts.

SLC I30t

iTrader: (1)

Just a thought if someone can answer for me... what about the different tips? Do you want something that creates a hotter spark? because they have the iridium ones and the split tipped ones... Where is daniel B to answer this stuff? or tilley? Medicsonic? All of you guys seem to know whats good or whats not. Help !!!!

SLC I30t

iTrader: (1)

Wow, I've avoided financial tragedy once again. I was going to get them, but I decided to wait and do someother stuff first... like get the new 311 and staind CD's.... he he he.

Daniel B. Martin

The majority of actual owner experience indicates that the stock NGK platinum tipped spark plugs work best in the VQ30DE engine. I can't offer any theoretical support for this, but accept it as a fact. Plain Jane (my '99 GXE 5-speed) is still running on the factory plugs so I have no personal experience to offer.

Spark plugs don't make a "hotter" spark. The ignition coil and supporting circuitry does this. There is no reason to think this is a performance-limiting factor with our engines. The spark you already have is plenty hot.

The value of platinum or iridium tipped spark plugs is durability, not performance. The new RAV4 engine is factory-equipped with iridium tipped spark plugs and Toyota calls for replacement at 120K miles. Some technicians worry about ripping out the threads when they attempt to remove spark plugs which have been installed in an aluminum cylinder head for that long.

SLC I30t

iTrader: (1)

Oh, ok. Doesn't stillen offer an ignition mod though? whats that all about?

Daniel B. Martin

There will always be someone offering to take your money in exchange for something you don't need. There are a raft of engine oil additives which fall into this category. You can buy a Mini-charger. You can buy magnets which clamp onto your fuel line. IMHO it's all crapola...

SLC I30t

iTrader: (1)

magnets? I'm not even going to ask.

Daniel B. Martin

Go to http://www.harborfreight.com/cpi/cta...emnumber=36098

SLC I30t

iTrader: (1)

I want to laugh, but then I think about where all those microfibercarbons(whatever they are called) are going...
With the talk about fuel injectors, comes the questions about liquid fuel injectpr cleaners///stp/mobile... what do you think about them?

MAXEJA

so are there any upgrades for the 60 K tuneup that will actually make a difference in h/p, or is the only differnce just going to be in the tuneup itself?

TarHeelMax

There are no upgrades involved with the 60k tuneup. It involves only changing old stock components for new stock components.

chris j vurnis

Regarding the above questions about ignition systems, you probably wouldn't need any more powerful of a spark until you are running a supercharger since higher pressure mixtures are harder to ignite.

Most modern cylinder heads are designed in mind for a flame front generated by a traditional spark plug electrode.
Those BOSCH+4 plugs might likely create a very differnt flame front -- might create localized hot spots on the tops of pistons... maybe it generates frequencies that "fool" the knock sensors.

All of those "high performance" plugs, wires, etc.. are best left with old cars... since virtually any aftermarket parts for a 70's era car is an improvement.

SLC I30t

iTrader: (1)

understood.... thank you.

tomj

I put the Bosch Platinum +4's in about 20k miles ago. 0 problems.
I also added the K&N panel filter 20k miles ago. I ckecked it the other day and it is a mess. So, I'll clean it and it will be brand new again.

guido_sst

In my experience, they tend to make the engine miss quite a bit at idle, stick with the stock NGKs and you'll be fine.

SLC I30t

iTrader: (1)

Why is it recomended to get a colder plug when you run NOS?

rupinsjo

Does the Fuel Master really work? Is it hard to install? How long until you have to replace it? Can it cause any problems?

Sounds too good to be true.

SLC I30t

iTrader: (1)

Is that the Magnet thing? It sounds like another cheese grader/apple slicing device to help you save gas.

Daniel B. Martin

It's a scam. As I said when I first mentioned magnets, it's crapola...

mcros

Go with the Denso Iridium plugs. Denso is by far the best spark plug made. They can be hard to find but, well worth the effort.

guido_sst

Actually, NGKs are considered to be more of a performance plug than a Denso. NGKs just happen to be stock in Nissans when Denso is stock in everything else Japanese. You can get the NGK Iridium IX plugs (by far the best Iridium plug out there) if you want to, but they cost a bundle for a modest, at best, power increase.

mtrai760

iTrader: (19)

To Prevent Detonation...