Thread: What pulley and plugs to get??

I agree with what everyone says, dont get pulley envy. The pulley is only a small part of a bigger equation. Its great having all the extra torque due to the smaller size but it hurts in the long run. Your HP will suffer severely. A 3.5 with your mods will more than likely outperform that 3.4 pulley with the same mods because of KR. And anything sub 3.4 is out of the question without some kind of valvetrain work or IC. Trust me, i blew a HG trying to run a 3.0/Full size IC/rockers/20* of timing/and stock exhaust manis w 3 inch dp. I learned the hard expensive way, take your time and do it correctly.

Well it is helpful to understand the Autolite heat ranges.

606 = Stock
605 = 1 step colder and good for stock motors to ~3.5 pulley
104 = 2 steps colder and good for 3.4 to 3.2ish
103 = 3 steps colder and good for 3.1 to farther than I'll ever go

If the plugs are too cold, the plugs don't get hot enough to burn deposits off of them which will lead to misfires as they accumulate. The recommendation usually is to run the hottest plugs you can safely get away with. So your best bet is 605s. If you have one or two degrees of KR with the 605s, you could try 104s. But you can see that 103s are for more hardcore setups.

EDIT: And I always like referring to Overkill's spark plug article.
Ontario Quebec Club Grand Prix :: Which Spark Plugs Should I Run?
That will feed your need for information.

14.1-14.6

Depends really, You should be fine with a 3.5 and 104's gapped right.

I think wrapping the crossover will not be a sufficient gain but you can try it. The tb gets a lot of heat from the supercharger itself. I have a tb shield from zzp and while it blocks the heat from the crossover, It seems like it gets hot from the s/c anyway.

I went with the AL104 when I got my GTX. I have a 3.5 SLP Pully, 2.5 SLP Catback, Ram Air, Ported TB and SC, 180 Tstat, UBend Delete, modified 1.9 Rockers and a DHP Tune on my PCM as well.

I was going to switch out my plugs so I spoke with Lee, who I would say knows his cheese about plugs He told me to check my current plugs to see if smelled gasoline on them and check to see if they were burned or charded, indicated a not complete burn off of the gas at the sparkplug (if I am saying that right? I am sure Lee will gladly correct me ).

I pulled a couple of the front ones out and they checked out OK. No smell of gas and they were actually quite clean after almost a year's wear on them. So I decided to stick with the 104's. My car doesnt seem to mind them to badly.

My Goal is to go to a 3.4, but I wont go there until I get my headers on my car. Once there I will have Trannyman do his magic on my PCM to really tweek it out and then see how a 3.4 would run on my car. But from all indications so far, it should be fine.

Originally Posted by GeddyLee

I went with the AL104 when I got my GTX. I have a 3.5 SLP Pully, 2.5 SLP Catback, Ram Air, Ported TB and SC, 180 Tstat, UBend Delete, modified 1.9 Rockers and a DHP Tune on my PCM as well.

I was going to switch out my plugs so I spoke with Lee, who I would say knows his cheese about plugs He told me to check my current plugs to see if smelled gasoline on them and check to see if they were burned or charded, indicated a not complete burn off of the gas at the sparkplug (if I am saying that right? I am sure Lee will gladly correct me ).

I pulled a couple of the front ones out and they checked out OK. No smell of gas and they were actually quite clean after almost a year's wear on them. So I decided to stick with the 104's. My car doesnt seem to mind them to badly.

My Goal is to go to a 3.4, but I wont go there until I get my headers on my car. Once there I will have Trannyman do his magic on my PCM to really tweek it out and then see how a 3.4 would run on my car. But from all indications so far, it should be fine.

Pretty well done James.

Yep, when I bought my car he took the downpipe off and left the 3.4 on... I get a lot of knock if I go into throttle, so I conserve gas a lot better never getting on the throttle! When I ran the 1/4 mile I was pretty scared so I put some race fuel in it and it helped a little but I was still knocking.

I have coated pacesetters, flo pro resonator + manual cutout I just bought to put on it and I'm debating whether to do full 3" exhaust the same time or wait till I hear what it sounds like, eventually I will do the 3" when I get some more mods...

Originally Posted by TDCRacing

you got a time on that car with those mods in your sig??

Haven't taken my car to the track yet. I've still got a few more mods sitting here ready to go on. After that and a tune I'll try and see what it'll run.

Do not get headers. With your goal, the plog/dp combo will be more than enough. Save that money for rockers and other mods. The rear PEM is not very important. If one falls into your lap for free, sure, but I certainly wouldn't pay $120 or whatever ZZP sells theirs for.

I'll quote from my favorite source for 3800 info, Overkill, about the exhuast:
"For mild-moderate setups, until you have a cam or run a 2.x" pulley size, the money saved by doing a Powerlog versus headers can go into modifications with bang for your buck."

And...
"A 2 1/2" downpipe with Powerlog will support bolt-on vehicles ideally. "

Your goals are basically the same as mine, except I am not going to do an intercooler.