So, I'm in the process of getting a new engine and I'm currently running 3" JBP cold air intake, 2.7" pully on M62, 60lbs injectors, ngk iridium 2 step colder spark plugs, a vibrant headers downpipe high performance cat combo and a GMPP cat back exhaust, retune, MRZ front upper strut bar and phenolic spacer.

I want this setup to be problem free and I've read different setup and I'm curious with the 2.7" pulley what injectors and plugs other people would run with this setup. Let me know your thought without the smartass remarks.

Once everything is back together I'm meeting up with BennyHRR to get the right tune to support the finished setup.

 

60's will be more than enough through out the whole year dude, we live in the same area with the same temps, elavation, ect... On pump gas the 60's are perfect. I never came close to maxing them out on a setup like urs

 

Thanks man and I know you gave me input on the spark plugs also. Actually your latest thread is the reason I even made this. Some dude was like.... "anything smaller then 2.8" you should be using 80lbs injectors"....which made me say F*** I need to do this right if I'm going to continue!

 

If your on ethanol and on a 2.9 or below you need 80s. If not on e 60s are good.

 

I don't mean to sound ignorant but doesn't all gas now a days have 10% ethanol in it?

 

Nope.....

 

It does, but your normal pump gas will be fine with 60s.

It's when you do the switch to E85 you need to bump up to 80s.

 

^^^ lol no it don't southern states, western states. I beleive cali is a state that uses e10 a lot..Sorry to say it but no they dont. It depends on where the location is at

 

James is right, If you were to run E85 You would need 80's on a 2.7" pulley. Our local pumps have 10% ethanol in the blend, so barely anything in there. 60's are fine for now with your 2.7" Pulley, Ask your tuner to show you how much gas is being used during a pull, ud be surprised that its not even close to being maxed out

 

you dont need 2 step colder plugs 1 step is plenty

 

do you have a part number?

thanks for all the advise, granted it seems like there are some strong opinions out there...

if it helps i'm based in va

 

This.

 

Advanced auto parts, NGK 4644 BRK7E its about 10 bux

 

Most lsjs dont like copper core plugs, so do. So i wouldnt waste my time or money!!

 

ur high




Copper Spark Plugs

Copper spark plugs are generally considered to have the best performance of any spark plug type. This is potentially different from what advertising companies suggest, but the other metals are, unfortunately, not as conductive in general as copper is. Platinum and iridium plugs are more likely to overheat, which causes damage to the plug components and can compromise the delivery of the spark to the engine block.

Platinum and Iridium Plugs

Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs. In reality, copper has the best performance of all three and the worst longevity. Platinum has good longevity and the worst performance. Iridium has good longevity and a performance that is decent, which is why iridium plugs tend to be more expensive than any other type. Still, the difference between these plugs in terms of overall quality is minimal, as there is a trade off for each.

Most copper plugs need to be changed every 20,000 miles or so. Platinum and iridium plugs can often go for twice that before they require changing, but the overall performance will not be as good and you may have to deal with overheating of the plugs. This is potentially not worth the added cost of both platinum and iridium spark plugs, although the decision will depend upon your preference.

 

i appreciate the write up and explaination

 

My LSJ looooooovvveess the copper plugs... ..

 

I wish

 

lol

 

My 07 LSJ has always seemed to run real good on step 1 colder NGK copper plugs. Now that I switched to the 2 steps colder with my recent mods I'm not so sure I should have changed.

I'm having idling issues like most people have talked about but I also just installed 50 lb injectors, LS4 throttle body 3" ZZP intake with a new tune. My throttle body is new but has been setting for quite some time till I bought the rest of the parts.

I've tried platinum and iridium plugs and always found that the car didn't run good with them so I always switched back to NGK step 1 colder plugs (of course I use to be GM Stage 2). I wouldn't suggest any other plugs besides the step 1 colder copper plugs for most LSJ's. There's always exceptions though.