Davidkuo0330

Confirm by Renntech, if you got their ECU tune, you better upgrade your spark plugs. Just order my Renntech spark plugs by NGK. Getting them install as soon as I get them.

vdubpower

they didnt tell u that when they sold u a tune??

Davidkuo0330

Honestly, they did. But was hoping I didn't have to because I forgot to order it at the time of the tune. Some people say they do, some people say they don't. I wasn't concern until recently read about mis fire.

sdg1871

I was told that I did not need upgraded plugs but would need to change my plugs every 10-15 miles which my MB dealer who is a Renntech dealer confirmed.

Davidkuo0330

Hi. I'm sure we got 2 different answers, but I oped to go with the Renntech plugs because I though about it and it didn't make sense for me if OEM plugs would do that they had NGK do a private label Renntech spark plug when it wasn't necessary to do so and even telling customers to retain the OEM plugs.

Anyways, that was my opinion when I ordered them.

Good luck on your track race. Can't wait to see you kick butt.

sdg1871

Thanks. I already did the Slipstream roll race. Car performed like a champ. Best every M car it faced. One M5 pulled harder (that car was heavily modded including catless DPs, intake and water meth injection) but got DQed for starting faster than 70 mph.

Davidkuo0330

Yeah, saw the slipstream clip. Kick so butt, even your Porsche. Very impressive. Race a brand new M3 and M4 and love the feeling of kicking its butt, especially I had ownd a M3 and M6. Again good luck on your next race.

Nanook

I did the plugs also..pricey little buggers

Davidkuo0330

Better safe than sorry.

OrientBlue3

I did the Weistec plugs when I had my tune installed just to be safe. Thinking about adding the AMS heat exchanger just to add another level of safety with the Texas heat.

Davidkuo0330

NGS_E55

What model of NGKs? I have the OE tune on 13' and have had a couple CEL/limp on cylinder 5 with factory plugs.

Davidkuo0330

Not sure about the model number, but I got mine from here:

http://www.goodspeedperformance.com/...hp?prodid=1867

dav461

NGK 8. They are used in Mitsubishi evolution X

TTA850

Plugs I've seen from RennTech are NGK part # SIZKBR8A8HS they are Alpina B7 plugs available from Amazon for $19.59/ea.



I've had them with my AMS tune for 11k miles so far no issues. Put down 590hp/726tq back in cool spring weather and most recently 562hp/685tq in 90* heat last week. Best dyno was 605hp/733tq but I don't have the graph

Press release on the plugs-
http://www.ngk.de/fileadmin/Dokument...oad_PDF_EN.pdf

Reasons to run a cooler plug-
https://www.ngk.com/learning-center/...or---do-i-need

Really a no brainier to go colder plugs, adding this much hp/tq anyone with knowledge modifying engines would suggest a colder plug. Same as putting a small shot of nitrous on an n/a engine, you could get away with stock plugs but a cooler plug will lessen the chances of issues.

nstanford99

ill be looking to do weistec plugs once i tune, how much does the dealer charge to put the new plugs in??

Davidkuo0330

My dealer charged me $200 2 days ago when I had my Renntech spark plugs installed. Now my mind is at ease.

untouchable

AMS told me to use oem plugs. Were you told otherwise? I have the heat exchanger. It helps with the cooling but is work to install.

Davidkuo0330

I think to me, the question is: Tuners like Renntech, weistec, not sure about AMS has there own branded spark plugs that is advertised as better/cooler then OEM spark plugs. If these tuners say use OEM plugs, why market aftermarket plugs as their own ?

Zod

Its called making money, not the first time i have seen or heard them use available parts and just stick their logo on them and charge more. Not saying this is the case with all their products, but in some cases yes.

Let us know how they hold up

Davidkuo0330

My point was if tuners put their name on a aftermarket product from the manufacturer, it should mean they endorse the product. Let's say Renntech doesn't recommend spark plugs upgrade after a tune. Why would they endorse the spark plugs and recommend OEM plugs. That was my point. Sorry if I made it sound different.

I only had the Renntech/NGK plugs installed for a couple of days. Don't see or feel any difference, but with the misfire thread I've been reading. I opted to be safe than sorry.

OrientBlue3

Can you share info on the install of the heat exchanger? AMS makes it sound like an easy swap.

OrientBlue3

Exactly!

NGS_E55

thx for 411 and nice mods/times. Are the NGKs pre-gapped? Do i need to worry? Will prob have dealer or OE Tuning install. -Mike

Davidkuo0330

Thank you and no problem. Not sure what you mean by pre grap, but the dealer installed them without any issues. Good luck.