I have a 1999 gmc sierra with 5.3 with btr truck norris cam and it is tuned for a wet 50 shot of nitrous but the kit i bought has the lowest shot of 75hp and i was wondering if it would need more timing pulled or would it be good? Havent tested it out gonna also use ngk tr6 spark plugs. Any ideas?

 

It really depends on how aggressive the 50 shot tune is.
without seeing the tune its unknown.

 

Ok got it i will be testing with new spark plugs and afr guage and go based off of that.

 

I've run a 100 shot without pulling time (27* total degrees) but you can't go buy any arbitrary number because you already could be close to knock. I'm pulling 4* on my 150 shot. I wouldn't run the TR6 projected tip plug it may cause knock. If you want that heat range run the BR6EF from NGK. I'm running the BR7EF a step colder with no idle or fouling issues.

 

TR6 is good for about 150 shot if timing is sane and your running 93.
Anything more and i would run a BR7EF to keep it safe.

 

Ok got it im just trying to start with a 75 and go up from their. I would probaly just go up to 150 once i can get a hold of an hp tuners to do the adjustments myself.

 

Why not a lingenfelter timing retard box so you can pull timing for the nitrous. And leave the N/A tune in there?

 

It has a nitrous tune.

 

So off the spray you're not running optimal timing?

 

Thats what it sounds like