What is the difference between 44ts & r45ts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 11-10-2004, 02:51 AM

Whats the difference in the r44ts and the r45ts?

Thanks

BurnoutNova · 11-10-2004, 02:59 AM

AC R44TS is a colder spark than an AC R45TS... i think with hei you can go hotter with the spark, it might help with oil fouling if your mototr is worn out . but they will both go in and run, almost no diffrence IMO

in my stuff i always run R44's, i dont really know why... i just do

i know with nitrous applications most guys run like an R42, or somthing similar

crustysarge · 11-10-2004, 02:55 PM

I have always ran a colder plug in a vehicle that sees a lot of highway miles and a hotter plug in a stop/go or oil burner.

Gator70 · 11-11-2004, 12:36 AM

The prefix R refers to Resistor type, 44/45 are heat ranges. the stock plug for many 73-87 SBC is usually 45. The suffix's on the end refer to how the plug looks on the bottom. Dont have the book with me but a TS is a tapered seat with smaller thread size 14mm I think. The AC R43 was the plug for older SBC point style ign. With my HEI upgrade I moved to A R45 to match the heat range of the early Hei SBC.

http://www.acdelco.com/html/catalog/index.htm

Brainchild · 11-11-2004, 04:03 AM

I ran 45 the last time,and went to 44 this time and it seems to run better.Maybe it's just me.

11-10-2004, 02:51 AM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	What is the difference between 44ts & r45ts Whats the difference in the r44ts and the r45ts? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

11-11-2004, 12:36 AM	#4
Gator70 Registered User Join Date: Oct 2004 Location: Turner Valley, Alberta Posts: 91	The prefix R refers to Resistor type, 44/45 are heat ranges. the stock plug for many 73-87 SBC is usually 45. The suffix's on the end refer to how the plug looks on the bottom. Dont have the book with me but a TS is a tapered seat with smaller thread size 14mm I think. The AC R43 was the plug for older SBC point style ign. With my HEI upgrade I moved to A R45 to match the heat range of the early Hei SBC. http://www.acdelco.com/html/catalog/index.htm __________________ 1970 GMC K15 - Canadian built 2nd Owner truck 68k miles 2014 Denali 1500 6.2L

11-11-2004, 04:03 AM	#5
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	I ran 45 the last time,and went to 44 this time and it seems to run better.Maybe it's just me. __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

11-10-2004, 02:59 AM	#2
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	AC R44TS is a colder spark than an AC R45TS... i think with hei you can go hotter with the spark, it might help with oil fouling if your mototr is worn out . but they will both go in and run, almost no diffrence IMO in my stuff i always run R44's, i dont really know why... i just do i know with nitrous applications most guys run like an R42, or somthing similar

11-10-2004, 02:55 PM	#3
crustysarge Registered User Join Date: Mar 2004 Location: Aviano, Italy Posts: 221	I have always ran a colder plug in a vehicle that sees a lot of highway miles and a hotter plug in a stop/go or oil burner.



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