which plugs r45t or r45ts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roadking · 03-04-2004, 04:42 PM

ive got a new gm 350 crate w/HEI, gm parts counter tells me to run the r45t, my chiltons and other autopart stores says to use the longer r45ts. im running the shorter r45t with no problems, didnt want to chance the longer plugs hitting top of piston. just wondering if anyone else has encountered this problem.

J.Lance · 03-04-2004, 07:37 PM

If I remember right, the parts store actually changes plugs between '71 and '72. Not sure why really. Of course my heads were off of a '72, the block was '75, and the truck was a '68! If it's a new GM crate motor, go with what GM recommends for that motor. Don't worry about the year of the truck.

Jason

walker · 03-04-2004, 09:06 PM

I may be wrong but I thought the difference between the r45ts and the r45t was that the ts was a peanut plug(with a tapered seat) and the t was a standard plug with a washer. I run the r45ts in my gm crate motor.

Blue_71 · 03-05-2004, 12:52 AM

TS is a tapered seat plug, no difference in length as far as i know

**kwmech** · 03-05-2004, 01:38 AM

T is for the tapered seat and
S is for and extended tip
X is for a wide gap

I always run the TS plugs myself they seem to me to burn better

Blue Beard · 03-05-2004, 10:13 AM

I'd rather run NGK plugs, can use different ones for wheather change. Out here it helps.

03-04-2004, 04:42 PM	#1
roadking Registered User Join Date: Nov 2003 Location: kc Posts: 229	which plugs r45t or r45ts ive got a new gm 350 crate w/HEI, gm parts counter tells me to run the r45t, my chiltons and other autopart stores says to use the longer r45ts. im running the shorter r45t with no problems, didnt want to chance the longer plugs hitting top of piston. just wondering if anyone else has encountered this problem. __________________ 71 C10 SWB BLACK AND WHITE 350 CRATE TH350 ENJOY LIFE

03-04-2004, 07:37 PM	#2
J.Lance Too many is never enough! Join Date: May 2003 Location: Idaho Falls, ID Posts: 455	Plugs If I remember right, the parts store actually changes plugs between '71 and '72. Not sure why really. Of course my heads were off of a '72, the block was '75, and the truck was a '68! If it's a new GM crate motor, go with what GM recommends for that motor. Don't worry about the year of the truck. Jason __________________ Jason 1968 K10 SWB Fleetside 1971 K2500 GMC LWB 1968 K20 (later frame, donor body) 1972 C20 LWB parts truck 1993 K2500 Suburban, tow rig, 454, 4L80E NEW!! 18' Siem's car hauler 2004 Honda Odyssey (family man!)

03-04-2004, 09:06 PM	#3
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	I may be wrong but I thought the difference between the r45ts and the r45t was that the ts was a peanut plug(with a tapered seat) and the t was a standard plug with a washer. I run the r45ts in my gm crate motor. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

03-05-2004, 10:13 AM	#6
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	I'd rather run NGK plugs, can use different ones for wheather change. Out here it helps. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

03-05-2004, 01:38 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,499	T is for the tapered seat and S is for and extended tip X is for a wide gap I always run the TS plugs myself they seem to me to burn better



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