Help me with my mods....

[bluegpgtp]

just my .02... i have run AL104's forever and i usually get 10-15k out of them without problems. I have never seen any effect on MPG's. Also L32's pull some timing with a stock pulley often.. i would look into a scanner before i went any smaller on the pulley. I have had a lot of combos i thought were safe and they were knocking. At a minimum find someone with a scanner to help you tune it. Also headers FTW i have some i WOULD sell cheap but im stuck in Afghanistan... Dont waste money on manifolds or D/P because you will only upgrade later. Modding is a sickness just do it right the first time.

 

[Turbocharged400sbc]

swap coil polarity at each oil change and you can get alot of life outta copper core plugs with DIS systems (equalize electrode wear)
that actually goes for many wasted spark systems where one plug fires at negative polarity vs its mate

 

[SleeperLS]

FWIW I have a set of SLP headers I am selling. i will let them go for a good price. they are ceramic coated, pretty good shape for being used for a couple years. I will post up some pics here of the front manifold with crossover...I will have to pull the rear out when I get my motor and trans out either tonight or tomorrrow. damn axle nuts

 

[intrigueing]

pics???

pics???

 

[SleeperLS]

I am just going to start a for sale thread here. The pics are in there.

http://www.thechicagogarage.com/forum/showthread.php?p=932574#post932574

 

[intrigueing]

Help!!!!!!!

Gas mileage stinks. Seemed to really tank after installing TR6s at 0.058.

Could th eplugs be the issue? I just went on a 1500 mile trip (all highway) and averaged 23. Any ideas?

 

[intrigueing]

Anyone???

Is my gap too big??? To cold of plug killing my mileage??

 

[DOC-Z]

MY $.02...

I had GREAT luck in my L67 with NGK V's and ran about 20 mpg around town and 26 hwy.

That being said, first, I would yank the NGK's out and see if one is fouled out and re-check them to make sure the gaps are on. I've had one that was supposed to be pre-gapped, but it was .15 off. I don't think that would drop your mileage that much, but it's not impossible, if you aren't getting a good or strong spark. Maybe you might have a bad wire from swapping out the plugs too.

If all of that checks out, try a set of AL's.


On a side note, if you are thinking about getting a 3.5, I happen to have a ZZP 3.5 without a hub for sale.

One thing I would definitely recommend is a ZZP Water Pump Pulley. They are bigger, so it takes some of the stress off of the motor. I figured out that I was getting about .4 to .5 MPG better with it on my car. If this is your DD, then when gas gets to $5 a gallon, you'll pay for the pulley within a few months.

I just swapped the H2O pulley off on Sunday from my old GTP to my 'Bird. This was my first "mod" for the GTP, it's easy to install and something that I will never sell as long as I have a 3800 V6. However, since you are so close, if you wanted to borrow the ZZP H2O pulley for a week or 2 to see if there is a difference, I would let you. However, if you want one, you'll have ot get your own.

 

[intrigueing]

Figured out my gas mileage problem. Idler pulley was seized.

 

[xringshooter7]

And you weren't breaking belts?

 

[intrigueing]

It wasn't fully seized but extremely hard to turn. I could barely turn it by hand.

 

[DOC-Z]

I like the NGK plugs better, but some seem to like the autolites better, as they only last 6k - 8k, you can try them both, and see which you like better........ And I'd buy a set of Ebay headers over a 3" DP, the cost is pretty similar these days, but the gains of headers are much better than a DP....... just my.02

Definitely! For the work involved, you'd be better with the headers.

I also happen to have an L67 Scanmaster for sale!

As far as plugs are concerned. I used NGK V's (fives). I couldn't say that I had a problem with them. I never tired the Autolites, but I had a whole world of garbage/knock when I ran the stock Iridium plugs with my set-up. I replaced my spark plugs 5 or 6 times since I owned my car. Before I started modding I used the stock Iridium ones. After modding, I only used NGK's (minus one time I decided to see what the stockers would do). I couldn't see or justify replacing all 6 plugs multiple times per year.