vetten76

What would happen if I sprayed my 04's stock plugs with a 75 h/p hit? Would the plugs themselves melt over time? Right away? Would it burn too hot for the cylinder? Has anybody done this?

p1bz

Alot of people do it, that don't mean that is right. Go with tr6's with a 75 shot. They are less than 20 bucks, why even consider not doing it?

02*C5

You can do up to a 100 shot with tr55 if you go above 100 drop to tr6 up to 150 above 150 tr7 and a prayer

vetten76

I was running the tr6's and the car just wasn't right. Idle was poor and the gas milage was off. I went back to the stock plugs and gained at least 3 mpg. The plugs are a pain to change. I tried at least three sets of different plugs based on what folks on the forum suggested. I ran through one bottle at my local 1/8th mile and the care did really well on just 75 h/p. The nitrous lasted the night as well. My plan was to hit the 150 jets with retarded timing and the colder plugs. However, the 75 hit was just right. I didn't loose in about 12 runs. I just hate changing the plugs. I even went to MSD wires. What a crap product. The MSD wires don't really click on and I've had one pop off. I'm never sure if their on completely. Thanks for the feed back guys.....

01C5VETTEMAN

I been running autolite 103s, idle little rougher not much, an my mileage didnt change any gapped at .35 im spraying a 125 wet shot nx, an if u goin to run your car do u need to worry bout fuel mileage lol, not me i rather lose mileage an be fast...but my mileage has not changed so try the autolites i been thru prob 50 bottles still on same plugs runs like a champ, hope this helps.....

BPG

just go with the BR7EF plug.. no idle issues and non projected tip. I would highly suggest checking out LS1Tech Nitrous section... lots of info.

vetten76

I'll do that. I was talking with the guy who fills my bottle and he said that with a 75 shot, the stock plugs would simply wear out faster. He didn't think that it would hurt the motor. I'll still research it though before I hit it next time. An MSD wire popped off again yesterday. The gas mileage I was talking about was everyday driving. I've gone through one bottle of nitrous in 6 months but drive the dar just about everyday. MPG counts on a daily basis. By the way, I did try the BR7EF and my car idled poorly. I tried three different types of plugs. Stock is still best for everyday driving. I have an automatic and the car would shutter in drive.

BLOWNBLUEZ06

A question for you to consider:

If you leave the 15 dollar stock plugs in and damage your motor, are you going to feel like an idiot?

BLOWNBLUEZ06

BTW, not trying to be a jerk. It's a legitimate question. I always ask myself " can you afford to be wrong"

My philosophy used to be "run the hottest plug you can get away with"
Now it's " run as cold a plug as you can run without causing problems."

In my case, it's BR7EF non-projected plugs.

vetten76

No offense taken. That's why I threw out the question. The stock plugs are one step colder than the BR7EF, although being non-projected. With a 75 h/p hit, no one recommends retarding the timing. It seems like that is a conservative hit on a stock motor. That's why I asked about the plugs. Perhaps one step colder isn't necessary. I guess non-projected is another story. And yes, I'd feel like an idiot! If I blew up the motor, guess that would make the opportunity to plug in something more current.

BLOWNBLUEZ06

Although it might not make sense, the lower the number, the hotter the plug. a TR55 is two steps hotter.

vetten76

I actually called NGK to ask them what plug to use? They were really happy to help me. They knew all about nitrous and an LS1 application. I made the mistake of ordering "nitrous" plugs from ZEX. They were terrible. I ran them for a day. Honestly, I got burned out on changing plugs. I bet I've done it 6 or more times now trying to get it right and based on what everyone suggested. Then there's the MSD wire issue. The damn things are so vague when installing. No positive click. I had one fall off again Monday. Back to stock I go on that one too!

JanCorvette

So for a 100 wet shot I was thinking of using some tr6s. Some say to use br7s. Projected tip, non projected tip. I don't want any idle problems and am not planning to change plugs every time I spray. What would be the best plug for street/spray?

I am planning on running stock ignition, window switch at 3000 rpm, and race gas for safety. Should I just go for a 75hp shot and be safe?

vetten76

The 75 shot makes a big difference. I geared up for a 150 shot but found that the 75 shot worked great in the 1/8th mile. Street tires and all. I spent all the money and stuck with the 75 shot. Funny.....

JanCorvette

How much did your time better with the 75 shot?

vetten76

I had the nitrous hit starting in second gear and at 3000 rpm on then at 5000 off. This was about six months ago. Frankly, I did collect the slips but really didn't pay attention to the actual times. The first night out my 21 year old son drove. He wasn't very good at it. He won 5 out of 18 races. Everything smoked the stock Vette. Then I added nitrous and tried it again and this time I drove. I raced 8 or 9 times and never lost. The all wheel drive cars are really quick! I can say that the 1st race I did in the 8th, my trap speed was 85 mph. The nitrous started being less effective throughout the runs and the last run was 75mph. I didn't start with a full bottle and didn't have a heater then. I've only run it two nights. There must be a calculation to show the time based on the trap speed? All I know is during testing on on ramps and other places, the car rocks on that small hit. I can only imagine what adding 150 h/p with a supercharger would be like.

JanCorvette

You were spraying on stock tr55s? Any timing pulled? Race gas?

vetten76

I was running BR6EF plugs, which NGK recommended. I didn't pull any timing out. Stock tune. Again, the car idled poorly and lost a little power over stock. MPG was a little off too. The car just didn't like those plugs. Pump gas, 91 octane California crap.

Nitro Dave

TR55 plugs are to hot for Nitrous. Maybe some have got away with it but why risk it?

TR6 plugs are colder but they are still a projected tip spark plug. People used them with stock motors and up to a 150 shot for years but there are better options now.

With nitrous you want a non projected tip spark plug. THis removes the heat off the spark plugs strap and out of the cylinder much quicker.

On a stock motor up to a 150 shot the BR7EF is a great plug. If your car is running bad on them check the gap and if that is not the fix you need to work on the tune.

Dave

JanCorvette

What gapped is recommended for BR7EF on a 1100 wet shot?