- Plugs
- Posted by m Ransley
I just got a set of the bosch platinum 4. They protrude into the
cilinder apx 1/8" less then NGK stock. From what ive read the further
the protrusion the more advanced the timing will be . As Bosch protrude
in less wouldnt advancing the timing 1 degree more than stock be in
order. As advanced timing to the optimal increases efficiency- power and
heat. Wouldnt this return timing to stock.
My old plugs were fine 20000m but the car idles alot better and has
more power with Bosch .
- Posted by Daniel M. Dreifus
ransley@webtv.net (m Ransley) wrote in message news:<13430-4094E6BF-1@storefull-3138.bay.webtv.net>...
Have not heard good things about Bosch plugs in Toyota. Frequent
reports of misfiring and poor performance, so be on the lookout for
any changes that may develop.
I'd be sticking with stock plugs - ND or NGK, known for excellent
results and longevity.
If your secondary (high voltage) ignition system is operating
correctly, you should be getting the same spark regardless of plug
type. Four groud terminals just give the spark alternate routes - it
still only fires at one point.
Again, I'd be sticking with factory stock ignition components - cap,
rotor, wires and plugs.
ps.: according to my factory manual, the little rubber gasket under
the distributor cap is a "non-reusable part"
To answer your question - I'd leave the timing stock also.
- Posted by JCM900
I put Bosch Platinum Plus 4's in at 100k miles and they have worked great.
I'm not 192k with no driveability or firing issues. I did not adjust the
timing either.
-JCM900
"m Ransley" <ransley@webtv.net> wrote in message
news:13430-4094E6BF-1@storefull-3138.bay.webtv.net...
- Posted by Philip®
Daniel M. Dreifus wrote:
I second Daniel's observations. The one time (about 6 years ago) I
trialed a set of Bosch+4 Platinums resulted in excessive firing
voltages at idle (I have an oscilloscope) and some misfiring during
warm up by the time 15k miles accumulated on them. The problem was
the electrode eroded down into the porcelain ... something you cannot
adjust for with these plugs. What a marketing gimmick.
--
- Philip @ Maximum Torque RPM
- Posted by JCM900
Sorry, I meant I'm *now* at 192k...
"JCM900" <msauers74@msn.com> wrote in message
news:GY-dnXfw6L64BwvdRVn-uw@warpdrive.net...
