I just picked up some autolite 605'*. What should I gap them to? I was told I should gap them at .057" with my mods setup as opposed to the .060" stock.
My current mods are:

3.4" pulley
Shielded CAI w/10" K&N cone
180* t-stat
Taylor Spiro Pro 8mm wires
Removed MAF screen
Magnaflow Wide Open muffler 3" inlet > dual 2.5" outlets
Removed exhaust resonator
Thermo Tec'ed crossover pipe


I hope to get myself a second income soon, and would like to do some internal mods (Todd -still doing the 1.9'*?), lifters (I believe I have some lifters starting to make noise now in the 5-6k range), 3" DP, and highflow cat, as well as a PCM if I can get someone to one for a 99.

Anyhow, currently I am running TR55'* gapped at .060" which have about 12k on them. I figured it wouldn't hurt to change and wanted to know what would be the best gap for my setup. I don't think any of the plugs are bad, as I finally got 30mpg. 250 miles one way on the freeway and stopped at a gas station and filled er up until it overflowed. only 8.2 gallons. Followed that tank up with a 27 mpg on the return trip, which surprised me as the was one less person in the car and the cruise was set at 75mph instead of the 80-85 on the way out.

Anyhow, Todd, Will, Dbtk2 (I know I messed that one up), silverbullet, anyone else with good knowledge on this, what are your takes on this?

Thanks in advance,
Martin

im considering new plugs and wires........... but the plugs look hard as hell to get to in the back..... any tips?

.57 should be ok, if you go a little deeper (add the rockers etc..) I would gap at .55 (which is what im gapped at with 104'*). I'll know the end of the month on the rockers, just depends on how much i want to spend changing things when i put the cam in, and if i have enough money You should get a scanner for the car before you start going to deep into the engine. You want to check for KR and things like misfires (maybe what your seeing in the 5-6k range). Gap at .57 then gap at .55 then at .60 and see which way the car runs the best.

Also the AC-delco wires are cheap and will do the job. Unless you want color in the engine I would stick with those. (if your trying to save some money I would however replace them with the plugs just to rule out the wires as a source of misfire. Also check each plug to make sure there are no cracks in the ceramic.

how hard are the spark plugs to get at? is it an all day job to change those and plugs?

it was on my friends ford ranger...

lets put it this way you have to crawl almost over the engine.

I can do mine in about 30 min. The back 3 are done by feel. Headers make it a bit easier but they are still a pain.

Plugs are easy on the Bonnie.. there'* a hell lot worse cars out there that in some scenario you would have to almost drop the whole engine to get to.. it'* a breeze..

SSEi_MN - It'* not an all day job, but it is quite a fun task getting at the rear plugs on a Series I. It might be easier to put the car on ramps or blocks and come at them from underneath. I've always did my parents SC'ed Park Ave'* from the top -definitely no fun, but if you think it is hard to get at the back of a Series I L67 in an H-body you should try it in a Riviera -you'll think the Bonneville is a cake-walk.

Thanks Todd. I'll definitely be checking over the plugs when I pull the NGK'*.
I had been thinking about running down and having Lil Jon from MNCGP autotap my car since I wanted to see if there is knock retard when it starts to make the noise (doesn't do it all the time, but every so often I hear it - 90% of the time I bring it up into that rpm range I turn everything off so I can listen for detonation, knocking, etc... -you get that after detonating three turbo motors to death in less than 30 miles).

I still haven't gotten any of thet GM top-end cleaner, but I plan to run that through in the next week. Maybe that'll quiet it down somewhat.

.55-.57 sounds about right. Each engine is different, and you'll basically have to do trial and error.

Go work on a 3100 in a Grand Am. Then come play with a 3800 in an H body. I found laying accross the fender/'Strut tower bar. Keeping a towel between you and the body is a good thing.

How many 00+ have you done?