My car hates the TR6 plugs(.035) when it's cold out. It loads up big time until it heats up which takes a good 10 min. It idles like a caddy when I have stock copper plugs in it. Can I get this richness tuned out? The car needs to get leaned out as it is. It was a solid 11.6 AFR on the dyno last year. Just want to make sure if I spend the money to tune it, this will be adjusted. Thanks.

 

I am assuming the 11.6 AFR was NA....my thinking is this is more of the issue than the plugs alone. I ran the TR6's for years with a 12.8-13.0 AFR with no issues.

 

Ray,

I have your 52mm TB nitrous plate. I dynoed the car last year on 150 shot and it made 110 to the wheels with it. My AFR was at 10.4 So I figure If I can get the car up to 12.8 NA, the nitrous will be right where it should be at. Any idea how much power I'll pick up NA going from 11.6 to 12.8 AFR? 355-GM847-Ported heads-T56- All bolt ons. Thanks in advance.

 

Its always hard to guess how much power you will make as every car is different.

But you should pick up some I just don't know how much.

 

I agree on the plugs not making that big of a difference on A/F......whats your fuel pressure at? Do you have an adjustable regulator? You could pry bump that down a couple of pounds.

 

I'd go with a pcmforless tune...He dialed mine in at exactly 13.0 af NA with the tr6 plugs.

 

Why not just have the car dynoed again and get the A/F ratio set to where it sould be? You'll pick up some HP and probably eliminate the "loading up" problem at the same time.