NGK UR5 plugs

[jemook]

For the NGK UR5 spark plugs recommended for our cars, mine being basically stock and running about 15# of boost.. Is there a particular part number listed other than UR5. I see copper core and the new V-Power advertised. So can anyone give me a good part number and a decent place to buy them. Thanks.
JOHN

 

[1KWIKSIX]

Do a search........Some recommend NGK YR5's over the UR5''s .
The YR5's are a non projected tip spark plug.
My understanding is that there is less potential for detonation. I've changed over to these last year and have run them all season with no issues.

 

[Royal-T-Ltd]

2771


Sent from my iPhone using Tapatalk Pro

 

[jemook]

Would that be the pn; 7052? Thanks
John

 

[Royal-T-Ltd]

pn for UR5s : is 2771.... at least that's what's stuck in my head and what it used to be.

I will run out to garage and double check.
Sent from my iPhone using Tapatalk Pro

 

[dynoman]

NGK 2771
http://www.autozone.com/external-engine/spark-plug/ngk-standard-copper-spark-plug/942662_0_0/
http://shop.advanceautoparts.com/p/ngk-v-power-spark-plug-2771/19650111-P

 

[Steve V]

I like yr5s for alky, and yr5 for no alky 15psi ish boost

 

[achalmersman]

YR5 plugs here. I like them and I've been abusing them for 2 years.

Sent from my VS990 using Tapatalk

 

[Royal-T-Ltd]

You guys with the YR5s - are you still gapping the same as UR5s? Have you noticed any difference at all over the UR5s?


Sent from my iPhone using Tapatalk Pro

 

[achalmersman]

I havent used UR5 plugs. I dont want to tell you wrong information. I can't remember for sure but I believe I have them gapped around 0.030". Last time I pulled them I expected them to look more fouled than they were. So far so good with me

Sent from my VS990 using Tapatalk

 

[1KWIKSIX]

I'm pretty sure I've got my YR5's gapped at 0.030" too. Only street driving duty here, but no issues.

 

[SS/GN]

The UR5 is a proven winner in low 10 second cars. Gap a tight .028 and turn it up.

 

[achalmersman]

The UR5 is a proven winner in low 10 second cars. Gap a tight .028 and turn it up.

And the YR5 is the same thing but non-projected tip. Served me well 35psi + on stock heads

Sent from my VS990 using Tapatalk

 

[Royal-T-Ltd]

Yeah I used to gap mine at .028 - I have a TR-6 ignition and put it back to .032-.035 now.... I was just wondering if the YR5s need different gapping.


Sent from my iPhone using Tapatalk Pro

 

[Steve V]

Yeah I used to gap mine at .028 - I have a TR-6 ignition and put it back to .032-.035 now.... I was just wondering if the YR5s need different gapping.


Sent from my iPhone using Tapatalk Pro

Tr6 likes being hotwired on the coil side and a .026 gap either way.

 

[jemook]

So would the NGK part number 7052 be the correct yr5 plug?
John

 

[achalmersman]

So would the NGK part number 7052 be the correct yr5 plug?
John

Yes

Sent from my VS990 using Tapatalk

 

[Cme2fly]

Nothing wrong with using a UR5(2771)plug with alky. I have been using them for years at 30 plus psi without issue.

 

[chriss4655]

UR 5 , tight 28 gap @ 27 psi !

 

[jemook]

Thanks guys, I got the YR5's and try them at .030 gap
John