Xceleratemaro

so i go to turn the motor over to get it at tdc #1 and i pulled the spark out and the plug electoed is bent so i pull the rest out and there all bent ...now i have trw pop top pisons i think that there hitting the plug at tdc...i have never ran this motor what do i do? is there a plug that i can buy that will take up for this? pn# please

thanks chris...

thirdgen88

what kind of pistons exactly (part number?)?? Also, what kind of heads and head gasket?? And finally, what kind (part number too) of spark plugs do you have right now?

Xceleratemaro

the pistons trw .1000 dome with a valve releif the head gaskit is the stock hight ...auto light5245

thirdgen88

cylinder heads are?????

Xceleratemaro

there 882 casting with 202 164 valves no that havent been milled

thirdgen88

If I'm not mistaken, those are the wrong plugs for those cylinder heads.. A 5245 has .709" reach, taper seat, and an extended electrode.. Those heads should take a .460" reach, taper seat, standard plug... I think that is your problem... the spark plug is probably threading way too far into the head before it seats, and the extended tip isn't helping you either...

Specs by SparkPlugs.com:

Autolite 5245 - .709" reach, tapered seat, extended tip
Autolite 26 - .460" reach, tapered seat

Xceleratemaro

dude your the man....thank you sooooooooooo much...wow sweet what kind of plugs sould i ask 4 when i go to the parts store..what heat range? a part number would be grate...


thanks chris

edit...sweet links..thats all i needed...damm THANK YOU....

thirdgen88

I'd either get a set of 25 autolites or R43TS ac delco...

88Camaro350

Get some r43ts , r44ts, or r45ts AC delcos. Only difference is the heat ranges. 45's being the hottest.

The plugs you are using are what my mothers 02 accord v6 takes IIRC. Way to long.

Rick King

I have had the best luck and performance with NGK v-power race plugs. if not running nitrus use the ur4--they are a raceplug one heat range hotter than stock--go to napa they have a ton of them on hand about 2 bucks a pice just my 2 cents

AlkyIROC

The TS plugs should be extended tip. You might just want regular R43T plugs. Also index the plugs so the the ground is at the top of the cylinder away from the piston. I have to index my plugs or the ground gets hit by the piston.

Xceleratemaro

what kind of gap should i run whith the compresstion i have *thinking 10/1/2-1 .....and i have a msd 6al box...also what heat range..i sould get the 43? thanks for all the help

rx7speed

so called "race plugs" are actually colder then stock

has to do ith most motors designed for racing have higher cylinder temps then some joe schmo driving around town going put put
the put put car is goign to have less cylinder temps so it's going to need a hotter plug to reach a self cleaning temp

a hotter plug like that in a racing motor is goign to cause issues of detonation, or electrode melting

88Camaro350

IIRC they recommend a .045'' gap with aftermarket ignitions and .035'' without a performance ignition.

rx7speed

what does this IIRC stand for

AJ_92RS

If I remember correctly, it stands for...... oh wait.

GhostTransAm

If I Recall Correctly

vernw

iTrader: (2)

I thought you were supposed to index plugs so that the open face of the electrode was pointing towards the VALVES, not the piston.

Also, if your SBC was 10.5 compression and supposedly 400HP, would you use the Autolite 24 or 25? I think the 24 is slightly colder if I understand their numbering system....

Hopefully the A-24/25 are a little shorter than the AC 43TS/44TS that won't clear my headers.....