Spark plugs for head/cam/E85/full exhaust C7 LT1
11-18-2018, 09:33 PM
#1
Spark plugs for head/cam/E85/full exhaust C7 LT1
what spark plugs would u recommend for lt1 heads/cam/e85/full exhasut? Some say factory others say 1 step colder plugs? What gap if going 1step colder?
11-19-2018, 03:18 AM
#3
11-19-2018, 06:35 AM
#4
I'm Batman..
Pro Mechanic
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 6,130
Received 908 Likes
on
561 Posts
Tech Contributor
Ant
11-19-2018, 04:38 PM
#5
Burning Brakes
I have the LTR7IX for my C7 Z06.
For an LT1 without boost, the 6's would be okay. The 7's will be okay too. I believe on my LT1 with headers, CAI and tune, I had the 6's. If I could go back and do it all over again, I would have left the stock ones in there but gapped a little closer.
For an LT1 without boost, the 6's would be okay. The 7's will be okay too. I believe on my LT1 with headers, CAI and tune, I had the 6's. If I could go back and do it all over again, I would have left the stock ones in there but gapped a little closer.
11-19-2018, 05:03 PM
#6
http://densoautoparts.com/find-my-pa...#searchResults
stock ones are 16 heat range which the part number cross reference exactly with NGK 5TRXI.
One step colder for denso is 20 heat range which cross references with NGK 6TRXI. Denso 22 and NGK 7TRXI cross references with each other. Just going strictly by both denso and NGKs interchange numbers.
Last edited by amuseti; 11-19-2018 at 05:18 PM.
11-19-2018, 06:03 PM
#7
I'm Batman..
Pro Mechanic
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 6,130
Received 908 Likes
on
561 Posts
Tech Contributor
http://densoautoparts.com/find-my-pa...#searchResults
stock ones are 16 heat range which the part number cross reference exactly with NGK 5TRXI.
One step colder for denso is 20 heat range which cross references with NGK 6TRXI. Denso 22 and NGK 7TRXI cross references with each other. Just going strictly by both denso and NGKs interchange numbers.
stock ones are 16 heat range which the part number cross reference exactly with NGK 5TRXI.
One step colder for denso is 20 heat range which cross references with NGK 6TRXI. Denso 22 and NGK 7TRXI cross references with each other. Just going strictly by both denso and NGKs interchange numbers.
11-19-2018, 08:12 PM
#8
In the age of internet, I encourage people to reach their own conclusions based on data.
So lookup what part number NGK recommends on their own site and it will say LTR5IX. And if click on specification of that model, it will say heat range of 5.
if change the 5 to 6, lookup the specification for LTR6IX, it will tell you heat range of 6.
if change the 6 to 7, lookup the specification for LTR7IX, and it will tell you heat range of 7.
Whether that's 1 step or 2 step colder readers can deduce it by themselves.
So lookup what part number NGK recommends on their own site and it will say LTR5IX. And if click on specification of that model, it will say heat range of 5.
if change the 5 to 6, lookup the specification for LTR6IX, it will tell you heat range of 6.
if change the 6 to 7, lookup the specification for LTR7IX, and it will tell you heat range of 7.
Whether that's 1 step or 2 step colder readers can deduce it by themselves.
11-20-2018, 01:55 PM
#14
Running the stock ac delcos is fine. I ran a brisk rr10s which is equivalent to a ngk 9 on my fbo setup (im running nitrous) and switched to the stock plug and saw no difference in power