It is stock 1999 need more speed!..what do you recommend? Going to get it chipped,intake hopefully dyno tune in a couple of months
Thank you for the advice, I just bought those plugs also where do you recommend me getting the MAF and why would I need those gauges, sorry I'm still learning I'm 18First off, before modding replace all fluids for piece of mind. Also, change the in-line fuel filter. This should be done every 2-3 oil changes. Its cheap and easy insurance.
Do not swap the upper pulley. In order to increase boost by swapping the upper pulley a smaller diameter pulley must be used which increases the likelihood of belt slip. The same can be achieved with a larger crank pulley.
4# or 6# lower pulleys are the norm. If reliability is of concern stick with a 4# lower. 6# pulleys are generally "safe" but they are more aggressive.
You'll need to swap plugs and retune for either a 4# or 6# pulley. You will also want to consider upgrading the MAF, especially since your truck is a '99 which came with a 80mm MAF from the factory. Use of a MAF extender such as the DiabloSport MAFia or an entirely new MAF such as the SCT BA2400 or BA2600 will ensure you don't "peg" the OEM MAF. "Pegging" the MAF results in blown motors and is possible with the use of 4# or 6# pulleys, particularly in the cool/cold winter months.
NGK TR-6 are great spark plugs which are inexpensive. The TR-6's will be in the desired heat range for either a 4# or 6# lower. Gap them to .034"-0.36".
Check to see if the intercooler recall has been performed on your truck. The '99-'00s where prone to leaking intercoolers. You might also want to clean your intercooler for piece of mind. Check out the "How-To" section for a thread to walk you through it step-by-step.
Invest in gauges also, vital but overlooked mods. I suggest a wideband air/fuel gauge, fuel pressure gauge and a vacuum/boost gauge. I'm also a big fan of the AeroForce Interceptor scan gauge due to its versatility.
Welcome to the addiction :thumbsup:
First off, before modding replace all fluids for piece of mind. Also, change the in-line fuel filter. This should be done every 2-3 oil changes. Its cheap and easy insurance.
Do not swap the upper pulley. In order to increase boost by swapping the upper pulley a smaller diameter pulley must be used which increases the likelihood of belt slip. The same can be achieved with a larger crank pulley.
4# or 6# lower pulleys are the norm. If reliability is of concern stick with a 4# lower. 6# pulleys are generally "safe" but they are more aggressive.
You'll need to swap plugs and retune for either a 4# or 6# pulley. You will also want to consider upgrading the MAF, especially since your truck is a '99 which came with a 80mm MAF from the factory. Use of a MAF extender such as the DiabloSport MAFia or an entirely new MAF such as the SCT BA2400 or BA2600 will ensure you don't "peg" the OEM MAF. "Pegging" the MAF results in blown motors and is possible with the use of 4# or 6# pulleys, particularly in the cool/cold winter months.
NGK TR-6 are great spark plugs which are inexpensive. The TR-6's will be in the desired heat range for either a 4# or 6# lower. Gap them to .034"-0.36".
Check to see if the intercooler recall has been performed on your truck. The '99-'00s where prone to leaking intercoolers. You might also want to clean your intercooler for piece of mind. Check out the "How-To" section for a thread to walk you through it step-by-step.
Invest in gauges also, vital but overlooked mods. I suggest a wideband air/fuel gauge, fuel pressure gauge and a vacuum/boost gauge. I'm also a big fan of the AeroForce Interceptor scan gauge due to its versatility.
Welcome to the addiction :thumbsup:
Get the MAFia or BA2400 now if for no other reason than to save money because:
1) you vent the block for pegging the 90mm
2) you realize you need one later then have to pay to retune.
Do it right the first time and be done with it unless you want to incur later cost to retune for it or build a new motor (worst case scenario).
I don't get this math. Can you elaborate? Is there a formula? Is there a variable missing such as rpm? Thx...
To determine the pulley ratio all you have to do is divide the diameter of the lower pulley by the diameter of the upper pulley. For example, the OEM lower pulley measures 7.5" and the OEM upper pulley measures 2.93" (on a Lightning, the 02-03 HD is slightly larger).
7.5" / 2.93" = 2.56:1
What this means is that every one revolution of the lower pulley the upper pulley makes 2.56 revolutions....