New spark plugs

[David Cooley]

Hey all,
I know this has all been hashed out before, and if it's all related to the 
unshrouding of the spark, which indexing would accomplish, then everyone 
needs to index their plugs!.
I just uploaded 2 images to the incoming ftp site... brisk1.jpg and brisk2.jpg.
ftp://ftp.diy-efi.org/incoming

These are 2 views of these Brisk "TSX" premium plugs... a non-visual 
description:
there is a metal ring bonded into the center electrodes insulater near the 
tip, and 3 ground electrodes that face this "ring".  Spark jumps from the 
center electrode to the ring, and from the ring to one of the 3 ground 
electrodes.  2 sparks in the chamber per ignition event, and they are wide 
open to the surrounding mixture.  Theory is good in that they may be 
igniting the mixture easier.  I received a set for free for testing on my 
1997 Ford Explorer 5.0L V8.
The stock plugs, Motorcraft AWSF32EE's only had 5000 miles on them... 
Looked nice and clean... slight off white tint to the center insulator, and 
a tan-light brown area on one part of the insulator, assumed to be due to 
the direction of swirl/flame travel.  All plugs look pretty much the same.
Baseline 0-60 on stock plugs (3 seperate gaps... .054 stock, .050 and .060 
with no different results in time).  9.0 seconds as timed on a Vericom.

New Brisk plugs... total of both gaps appears to be around .050" to 
.060"  5 runs back to back under similar weather conditions in the same 
stretch of road as the previous test...  8.3 seconds.  all runs within 0.1 
sec. of each other. (varied from 8.2 to 8.4) on the same Vericom.

Impressions:  Idle is smoother and engine is more responsive... Even new 
stock plugs felt like there was a slight miss at idle...
no flat spot off idle, and engine doesn't fall on it's face like it's run 
out of air/fuel at 4500 RPM.. stock 1-2 shift point is 5200 RPM.
Accelerating on dry pavement from a dead stop at WOT and all 4 tires 
squeeled as they crossed the paint lines of the crosswalk...  Stock plugs 
wouldn't do this unless it was damp out...  Engine pulls right past 4500 
with no fall off of power, and the shift is slow enough that I have to be 
careful and watch... holding my foot to the floor and 7 out of 10 times the 
engine hits the rev limiter at 5500 RPM before it can shift!
Heavy loads at freeway speed (passing) are no problem either... no 
hesitation etc, just pulls great.
Took a couple trips this weekend as well... about 500 miles total... 
Mileage is up to 23 on this thing, some traffic, mostly cruising at 75-80 
with the A/C at full boogy.
Stock plugs, best mileage on these same trips under similar conditions was 
19.5-20
Thanks,
Dave
===========================================================
David Cooley N5XMT Internet: N5XMT at triad.rr.com
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
I am Pentium of Borg... Division is Futile!
===========================================================

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org