I just bought new Sparkplugs what should I gap them to? HELP

[oVer-Boostin]

I just bought some new NGK BPR7ES spark plugs for my stock 98 GST (besides non recirc Blitz BOV) and I am wondering what do I need to gap them to? Also I have 10mm spark plug wires on the car. Thanks.

 

[snowborder714]

They should be pregapped for you but .028 is the recommended gap. I always double check mine before I put them in.

 

[DSMunknown]

This thread may also interest you. Read Andy's posts (#12 and 15).

 

[laserspeeddemon]

Seriously dude, this thead have been done. MANY times.

0.028"

 

[2002SL1]

0.028 I have mine at 0.025. Only reason I do that is so when they expand and that gap gets bigger its still in the .025-.028 range. But at 30psi they are going to do that alot more than what they will on your car since you're not running as high of a boost pressure.

 

[daren_p]

I just bought some new NGK BPR7ES spark plugs for my stock 98 GST (besides non recirc Blitz BOV) and I am wondering what do I need to gap them to? Also I have 10mm spark plug wires on the car. Thanks.

Why did you buy these plugs for a stock setup Your not running enough boost to justify switching to these plugs, all they are going to do for you is foul alot quicker. I wouldn't switch to the 7's unless your running over 18 psi. I would pick up a stock heat range set (6's) & gap them at .028 & call it a day. No need to gap them down to .025 on your setup all you would be doing is possibly hurting performance.


While were at it, why are you not recirculating your BOV? Just because you can do it, doesn't make it a good idea They recirculate them from the factory for a reason

 

[DSMunknown]

Why did you buy these plugs for a stock setup Your not running enough boost to justify switching to these plugs, all they are going to do for you is foul alot quicker. I wouldn't switch to the 7's unless your running over 18 psi. I would pick up a stock heat range set (6's) & gap them at .028 & call it a day. No need to gap them down to .025 on your setup all you would be doing is possibly hurting performance.


While were at it, why are you not recirculating your BOV? Just because you can do it, doesn't make it a good idea They recirculate them from the factory for a reason

^^ Ha ha! Daren's on a tear today!

 

[wret]

Someone didn't check the FAQ's before posting.
http://www.dsmtuners.com/forums/showthread.php?t=233421

 

[daren_p]

Why did you buy these plugs for a stock setup Your not running enough boost to justify switching to these plugs, all they are going to do for you is foul alot quicker. I wouldn't switch to the 7's unless your running over 18 psi. I would pick up a stock heat range set (6's) & gap them at .028 & call it a day. No need to gap them down to .025 on your setup all you would be doing is possibly hurting performance.


While were at it, why are you not recirculating your BOV? Just because you can do it, doesn't make it a good idea They recirculate them from the factory for a reason

Oh c'mon wret, you didn't have to modify my post, it was just a joke (note the rolling smiley face ) I'm sure no one took it too seriously. If I offended any Honda owners, I appologize

 

[wvturbo2]

Someone didn't check the FAQ's before posting.
http://www.dsmtuners.com/forums/showthread.php?t=233421

What makes you think that? AT what point would one need to switch from 7's to 8's ??

 

[oldman]

Daren sumed it pretty well except for whatever Ron deleted , BPR6ES@.028" then recirculate your BOV, read through the forum FAQ before posting a new thread.

What makes you think that? AT what point would one need to switch from 7's to 8's ??

I wouldn't even consider it until at least 25+ PSI.

 

[wvturbo2]

Poor 17c could never push that much boost .

 

[tkelly27]

Cold plugs and a non-recirc BOV is asking for fouling.

Now for some info that might be helpful in what you should gap your plugs to!

My ex-girlfriends dad had purchased a car (he was into "dinosaur V8's") that had been "tuned" to account for a vacuum leak by the former owner changing the plug gaps on each cylinder until it ran right. So clearly plug gap is important.

A good rule of thumb that I go by is that a larger gap gives a bigger spark that exposes more of the compressed charge to the spark which will give you a better burn and thustly, more torque.

Great, more torque! That's not the whole story. The longer spark gap is harder for the ignition system to shove the voltage across, especially as pressures (boost, and higher RPM super-fililng, etc.) in the compression chamber increase and this can actually blow out the spark leading to misfires. This is why people racers go to hotter ignition systems and top fuel engines use arcs that would embarrass most welding machines.

Another rule of thumb, smaller spark is better for higher end operation. For the exact opposite reasons of the above, the shorter gap gives a better spark under higher pressure.

Now, the CORRECT gap is .028. You could play around with +/- .005 to see what feels good to you and what helps keep your plugs from fouling with the goofy setup you've decided to run with if you had some time to kill. I had time to kill so I wrote all this.

I had an old plymouth horizon that I opened up the gaps by 5 thou and it LOVED every bit of it. It ran better, started better, had better top end... I had another old car that I opened up the gaps a little bit on and it wouldn't run right to save it's life. It's real real easy to change and fix though, and the worst that happens is a fouled plug or poor starting as compared to other aspects of tuning which can result in bad times.

If anyone has experienced or read differently I would find it interesting to read, as I'm not infallible

Use a torque wrench!!!

 

[daren_p]

Daren sumed it pretty well except for whatever Ron deleted

It still can be seen in DSMunkown's quote

 

[oldman]

It still can be seen in DSMunkown's quote

I don't see it?

 

[Defiant]

To start, take them back and get 6s.