spark plug for pro 1

[gregvega]

I have pro 1 200cc angle plug heads for a sbc. The chambers are 64 cc and have been angle milled to 54cc, header tubes are close so what is a good short plug for these heads? I had a set of edelbrock heads with some champion plugs that were a little short than norm, I'd have to get the number.

[1989TransAm]

Funny I have been doing some research on this today. I have the same heads but of the straight plug design. I only have one plug that needs to be a shorty. As you may have found out some "regular" plugs are shorter than others in their design and may work depending on how much clearance you need.

So far today the only two shorties I have come up with that will fit our heads are the Accel 416S hotter and the 414S cooler. I'm running 10.75:1 compression on my street/strip motor and I will order the 414S. I'm current running the Autolite AR3511 plug and the heat range is good for my motor. Problem is it does not have a resistor and causes some problems with my electronics and spark. So off to another spark plug with a resistor. :D Looking at the Champion RC12YC, Autolite 3924 or maybe the AC FR1LS.

Edit: I assumed you have aluminum heads? Also there are probably more shorty spark plugs that will work. Just have to research more.

[1046warrior]

I run NGKS in my pro 1 angled heads, it's tight but all plugs clear my headers and wires....

[BAD67]

im using the autolite 3924 in my dart pro 1 alum heads there a little tight but work great

[gregvega]

Do you think the accel 414s will be ok with 14:1 comp?

[1989TransAm]

Well I'm only running 10.75:1 in my street motor and they are fine. The 414S is a resistor plug which I need for my electronics.

With 14:1 I think you will need a much colder plug. So I would say no. If you do not need a resistor plug they may have another plug with a colder heat range.

[gregvega]

Well so far all I seem to know is .750 reach with gasket resistor type doesnt matter. I like the u groove and the shorty plug but Accel really only has the 2 plugs to choose from.

[1989TransAm]

Thats true in that you need a .750" plug with a gasket. I guess that will limit things some.

[Awesome Bill]

ar 133 for seated and ar3933 for washer.

[Awesome Bill]

autolite racing plus

[gregvega]

Thanks Bill, are the autolite's standard or are they a little shorter?

[lun40119]

I am workin on this now too. I have alum 64cc angles and around 12:1. Is the ar3933 going to be comparable in heat to the and the accel 576. Thanks for the help.

[Awesome Bill]

You can run the AR3932, very cold and for very high comression and lots of NOS, -33-34-35 from lowest being colder and highest being hotter. Take your pick, we use these all the time. I prefer the 18 mm head when using NOS, it tends to heat sink better with multiple big systems.

[lun40119]

Been running AR3924 and are liking them. The auto lights are standard length. They fit well with angles and my super comps.

[BAD67]

What is the difference between the 3924 and the ar3924's ? :cool: :cool:

[Awesome Bill]

one is a racing plug, the other is stock. Ground strap is better on the racing series

[lun40119]

The AR3924's electrode tip material consists of Chromium Nickel Alloy. The plain 3924 is copper. The AR's ground strap is trimmed back also.............the 3924 is cheaper :D

Jake

[BAD67]

so the heat range is the same ? should i switch to the ar3924 will i see any difference or am i wasting my money and my time?

[want-a-be]

so the heat range is the same ? should i switch to the ar3924 will i see any difference or am i wasting my money and my time?

I think you ought to stick with what you're currently running.

Thanks, Don

WCRE

[lun40119]

Why do you say that Don? U think I should switch to the less expensive, off the shelf plug in the turd. Or stick with what I am running???

Jake

[want-a-be]

Try the cheaper plug and see how it does. We did a dyno test 10 years ago and saw very lil difference in the pluggs. Except 1 plug. It dropped in hp pretty badly.

Don

WCRE

[Awesome Bill]

Its not copper, that would burn at a rate you would not even get 10,000 miles on it. I think it is more of a copper with another long lasting material like nickle. All spark plugs will work about the same, you will only find power when your running the wrong heat range and the spark is not hot enough to get the heat started quickly and make a nice burn. I have never seen hp made with any claims of "Secret, Special, new design mine is better bull____" The life of the plug is what the manufactures want to keep believe it or not. If a plug in a new car misfires, the cats take a beating and will cause damage earlier and may cause a cat failure. That is why everyone has jumped on the band wagon with platinum. With todays ignition systems, it will fire even if the ground strap is gone. We still cut them back to just make the spark jump to the plugs outer wall. We still see no hp loss. So weather we make them from Nickle, steel alloys, platinum, they just have to supply the ground for the spark to jump. World War 1, the plugs were made from platinum because they needed the plug to be 100% all the time and last. They could not afford to loose some cylinders due to misfire. The properly matched heat range with compression and use of the plug makes more power than anything out there. HThelps.

[lun40119]

Huh, got that off the website.

Read for yourself.....

http://store.summitracing.com/partdetail.asp?autofilter=1&part=FRM%2D3924&N=700+115&autoview=sku

According to what I am reading copper melts at 1984.32* F. Hmmmmmmmmm.

[Awesome Bill]

I take a very small offense to people who think they know where my knowledge comes from especially something like a summit racing website that I have never seen. I have been a Delaware Emission expert for 20 years as well a one of the best driveability techs in the business. This is basic knowledge that most good 5 year techs have to know to properely tune and make repairs to emission systems especially where cat failure occur. Spark plug misfires account for a ton of cat failures. I find people like you who act like you know something about a particular subject and make calls that don't add up and then attack with information you don't even know anything about, silly at best. Maybe someday? I don't have to know where a spark plug melts, I just need to know aluminum goes out the exhaust port @ around 1575° and I keep my egts well under that with and with nos. Maybe that is why they don't make the electrode from aluminum. I do know how to make a ° symbol without putting a lame * up there instead! They do have night school all the time for beginners. Oh. if you can't take it, don't print it.

[lun40119]

Now you change the subject, and insult me and never really backup your comment. The question was the difference in the two plugs. One has a copper tip and the other has an alloy tip. Not what temp aluminum leave the chamber at, or how to type a degree sign, or any other BS you want to spew. I don't order from summit either, however there website is set up well with lots of information as well as all the PDF's. So before are nice on PM's and try to sell me crap, perhaps you should read who you are PMing. And keep the CRAP in your mouth, its getting old.

IF YOU CANT DAZZLE THEM WITH BRILLIANCE, BAFFLE THEM WITH BS

[Awesome Bill]

yeah I have heard it all, Grandpa always said if you throw a bone in a pack of dogs, the only one that squeals is the one who gets hit. You should take your own advise before you post an insuating statement about where my information is originated! Summit racing does very well with their information and sales, they are a top notch business and deserves to be noticed @ that. They keep the industries prices pretty much in check.

As far as aluminum leaving the combustion chamber, thats the only metal I pretty much worry about because before the spark plug will leave, damage to the pistons will be pretty much the problem so why should I worry about what material a spark plug is made of. Like I said before, you could put most any metal in the plug and it will fire.

As far as the nit picking, leave that to the other forums, this is for people who want honest correct information. If I make an error in something I post, any one can say so. If its not in error, the only thing needed is a "I agree with that". jmo

[want-a-be]

I do know how to make a ° symbol without putting a lame * up there instead!They do have night school all the time for beginners.


LOL...I have more important things to do with my non-existant free time. If I type the "lame" * symbol to represent a degree ° then so be it.
Thing is.....if it gets the message across then I've done my job of expressing myself. Never have been impressed with cute things done on a pc..
Enough said

Don


WCRE

[lun40119]

It was 66° degrees here today, the forcasted low is 41°.............My turd SBC has 28° Initial and 38° total, with an 8° start retard, and 23° Dart 215's. My turd cam from Stevo has 256° intake and 268° duration at .050, and 292° and 302° duration at the seat, and a 106° Lobe Sep. LONG LIVE THE ENGINE MASTER!!!!!!!!!!!!!!!!

Can we move on to talking about things involving engines and cars now?????

[Awesome Bill]

I have to agree! engough said.

[lun40119]

FWIW.........I have been running the R5671A-7 for a couple of weeks now, and they seem to work..........................

Jake

[BAD67]

thats an ngk plug correct?what autolite plug does that cross with?and what heat range is it?

[lun40119]

NGK and I think it crosses with ar3925......

[BAD67]

according to autolite no such plug as an ar3925

[lun40119]

Crap...........sorry meant AR 3935......sorry, try it might help with the issue you are having.

Check out this link, it is kind of neat, and handy ttyl.

http://www.yellowbullet.com/forum/showthread.php?t=25660

[lun40119]

Might help with the idle thing, not the et thing..........did you ever put the other bushing in that dist????

[BAD67]

Havent tried the bushing yet waiting on a test and tune to sort out these things.Iam definitly gonna try it though

[BAD67]

i have bought the R5671A-7 gonna give them a shot and see if it helps also

[lun40119]

And.....................................