3800 spark plugs?

[Kyle]

ok, so what are the down sides to colder plugs?

I'm pretty sure my car has 2 steps coler than stock.

i found some that are 4 steps colder.

are there any downsides to plugs that are that much colder?

i dont even fully understand what that means to be honest.

just let me know waht u guys think

Click to read more...

 

[Mike K]

Originally posted by Kyle@Dec 4 2004, 11:45 PM
ok, so what are the down sides to colder plugs?

I'm pretty sure my car has 2 steps coler than stock.

i found some that are 4 steps colder.

are there any downsides to plugs that are that much colder?

i dont even fully understand what that means to be honest.

just let me know waht u guys think

[snapback]62450[/snapback]​

Colder plugs generally result in a rough idle. The goal is to use the hottest plug you can without knock.

 

[Kyle]

Originally posted by Mike K+Dec 5 2004, 12:12 AM-->

<!--QuoteBegin-Kyle

@Dec 4 2004, 11:45 PM
ok, so what are the down sides to colder plugs?

I'm pretty sure my car has 2 steps coler than stock.

i found some that are 4 steps colder.

are there any downsides to plugs that are that much colder?

i dont even fully understand what that means to be honest.

just let me know waht u guys think

[snapback]62450[/snapback]​

Colder plugs generally result in a rough idle. The goal is to use the hottest plug you can without knock.

[snapback]62452[/snapback]​

[/b]

but colder plugs aid in preventing knock right? i mean thats the reason you get colder ones i thought.

and why would i care about rough idle i just got a cam

 

[syP]

does that mean you wanna race me?

 

[Kyle]

Originally posted by syP@Dec 5 2004, 12:34 AM
does that mean you wanna race me?

[snapback]62456[/snapback]​

in spring definetly. car is being fixed then stored soon so when spring comes yeah.

i think it would be a good race.

togs/3.1/rockers

vs

stage 2 cam/ stock exhaust manifolds (next upgrade) / 3.0 pulley

so i think it would be a good race

 

[Mike K]

Originally posted by Kyle+Dec 5 2004, 12:15 AM-->

Originally posted by Mike K@Dec 5 2004, 12:12 AM
<!--QuoteBegin-Kyle

@Dec 4 2004, 11:45 PM
ok, so what are the down sides to colder plugs?

I'm pretty sure my car has 2 steps coler than stock.

i found some that are 4 steps colder.

are there any downsides to plugs that are that much colder?

i dont even fully understand what that means to be honest.

just let me know waht u guys think

[snapback]62450[/snapback]​

Colder plugs generally result in a rough idle. The goal is to use the hottest plug you can without knock.

[snapback]62452[/snapback]​

but colder plugs aid in preventing knock right? i mean thats the reason you get colder ones i thought.

and why would i care about rough idle i just got a cam

[snapback]62453[/snapback]​

[/b]

They only prevent knock if they are causing it in the first place. This is why some see no difference in a plug change.

 

[98 TGP TOY]

but colder plugs aid in preventing knock right? i mean thats the reason you get colder ones i thought.

Yes, colder plugs help reduce knock. They also wear out faster. You will need to replace them more often than a stock plug. A "colder" plug means that the actual plug will stay colder, thus reducing a "hot zone" for knock to start. For a good read up go here:

http://autolite.com/tech/HeatRangeFacts.pdf

 

[Kyle]

hmm so i should stay at only two heat ranges colder?

i'm not seeing much knock anymore really. with headers and my current timing i think i would see none.

 

[98 TGP TOY]

Originally posted by Kyle@Dec 5 2004, 12:56 AM
hmm so i should stay at only two heat ranges colder?

i'm not seeing much knock anymore really. with headers and my current timing i think i would see none.

[snapback]62466[/snapback]​

If you scan and see none, then try going up a heat range. If you see knock, drop back down the heat range and youll be set. Just another way of tuning.

 

[Kyle]

Originally posted by 98 TGP TOY+Dec 5 2004, 01:04 AM-->

<!--QuoteBegin-Kyle

@Dec 5 2004, 12:56 AM
hmm so i should stay at only two heat ranges colder?

i'm not seeing much knock anymore really. with headers and my current timing i think i would see none.

[snapback]62466[/snapback]​

If you scan and see none, then try going up a heat range. If you see knock, drop back down the heat range and youll be set. Just another way of tuning.

[snapback]62468[/snapback]​

[/b]

kind of alot of cash to spend on plugs though, just for testing.

 

[98 TGP TOY]

Autolites are $1-2/ plug.

 

[Kyle]

yeah but they're not what i'm running now, nor will be running.

i'm going with denso iridium plugs.

which would make testing with autolites pointless just because i'm assuming that i could run hotter iridium plugs than i could autolites.

or maybe i still dont understand the whole concept still.

theyre like $10 a plug, but suposedly one of the best plugs you can use for boosted motors.

 

[98 TGP TOY]

Well its entirely up to you. I run autolites. I have no experience with iridium plugs. If your getting zero knock with that set, then stay. The most hp you would get from running a hotter plug (without knock) is 1-4, because of a better combustion. As long as your not fouling your present plugs at all, stay with them. Your set.

 

[Kyle]

alright thanks for ur help.

i'll just stay at my current heat range and see what happens.

 

[Royalgtp]

I think most people run auotlites......104s are 1 degree colder and 103s are 2..

I am with 104s currently gapped at .050 with the 3in pulley, IC and headers and main mods....

I may try the 103s one day if I finally tune my car and drop down to a 2.9 pulley

 

[98 TGP TOY]

I've always read 104s to be two heat ranges colder...or 1.5. And the 605s are one heat range colder or .5.

 

[Royalgtp]

I think this is a big misunderstanding. I read a big thread about this a long time ago...

605s are stock..
104s are 1 colder
103s are 2 ""

 

[jk99gtp]

Originally posted by RoyalGTP@Dec 5 2004, 09:19 PM
I think this is a big misunderstanding.  I read a big thread about this a long time ago...

605s are stock..
104s are 1 colder
103s are 2 ""

[snapback]62610[/snapback]​

Actually,

606's are stock heat range.
605's are 1/2 - 1 step colder
104's are 2 steps colder
103's are 3 steps colder

http://www.autolitesparkplugs.com/results_...sp?AAIA=1357141

 

[Royalgtp]

the debate continues. :lolsign:

 

[Kyle]

heres what thrasher says

http://www.thrashercharged.com/store_htm/a...s_autolite.shtm