well ok i just finished up reading through all differnt forums about upgrading the */c pully size. I just had a few other question i could not find....im planning on getting a 3.4" pully for my bonnie and was just wondering the exact size i should change my spark plugs to, also i have a gutted airbox with a stock filter i was wondering if i got a kandn filter that would work out or would i be better off putting a cone filter on a home made intake until i buy the thrasher intake...lastley is it 100% needed to rent the pully removal tool? thanks.....I just need some more power!

ok....
you should go one heat range colder on the plugs
the Gutted AIrbox should be fine, bit a Rice Pipe and Cone K&N WITH a heatsheild will be better
a thrasher Intake wont fit on your car its better to make your own heatshield,

mine is pretty effective







and its also recommended to install a 180* thermo to combat the extra heat that the smaller pulley will create


if you come to NEBF Bill has a pulley puller and we can install it

ooo realy i figured it be the same size as a grand prix...etc do u no of anyother comany with a air intake for a 98 bonniville ...so all you did was get a rice pipe and a cone filter? it seems u made some type of box around the filter and then used heat tape and covered it all ...would i have to put a box around the filter? n ya i was gonna look into a 180 tstat also im gonna wait till winter is over tho for that... n one last thing...were would i have to go to have help putting that pully on? i live in buffalo im not to sure were u where talking ...thanks alot for the help

Dyno... I see you are thinking about a smaller pulley. If you get the stuff, I have the special puller required and would help out on the project.

Since you are a ways into NY .. If you were available, I'd say..plan to come to NEBF...all the info is in the Eastern Meets section. We could get it done and help you with the other little things you might need/want to do.

ok well not a sure yes or no but ill keep that in mind...

There are about 4-5 people coming from your area.

A 180 * thermostat will be useless if you dont have a upgraded PCM to run it.

The thermostat still opens at 180. The PCM would make it better yes because it would start the high speed fans sooner, but you're still getting the benefit of increased flow at a lower temp.

I would not put on that 3.4" pulley with what you have done or are going to have done. You need to scan to see if you are getting KR right now. Then If it is 0* or just a blip here and their then I'd drop to a 3.5" pulley. To run a 3.4" pulley I'd at least have a 180* t-stat, 2 heat range colder plugs, PCM, and gutted airbox or better yet a FWI.

what kinda tool do i need to see if i have kr do i just bring it to a auto store? or a shop? and also were could i get a reprogramed computer? and how much wil that run me?