I've noticed some "new sounds" from my engine area under certain conditions that have me concerned. I think I'm going to go get another A/F done, but @ $130 for the dyno w/ A/F I'd rather get some feedback before doing this.
Background - I have a new Autorotor CTSC. I have an original fuel pump but it can hold 90+ psi no problem at WOT. I also had new spark plugs and injectors fully cleaned at the time I installed the CTSC. The car is a 91 has 120,000 miles - had great compression/leakdown before the blower and makes my most recent dyno was 344 rwhp.
- I almost always see 8.5 psi of boost on my Spa electronic gauge at WOT above 5500 rpm
What has me concerned is that I am hearing some "popping" sounds coming from the engine. It's not like any "pinging" i've ever heard before. The popping only occurs between 7-8.5 psi of boost at WOT. Fuel pressure at this time is around 90psi.
I'm thinking that the blower is somehow making more boost than expected. I trust the gauge as this is a high quality electronic gauge that is mounted directly in the intake port that Comptech made for boost gauges. Additionally, the colder weather (35-50) makes the air denser and between the two could be creating a lean condition.
Any advice is highly appreciated.
Background - I have a new Autorotor CTSC. I have an original fuel pump but it can hold 90+ psi no problem at WOT. I also had new spark plugs and injectors fully cleaned at the time I installed the CTSC. The car is a 91 has 120,000 miles - had great compression/leakdown before the blower and makes my most recent dyno was 344 rwhp.
- I almost always see 8.5 psi of boost on my Spa electronic gauge at WOT above 5500 rpm
What has me concerned is that I am hearing some "popping" sounds coming from the engine. It's not like any "pinging" i've ever heard before. The popping only occurs between 7-8.5 psi of boost at WOT. Fuel pressure at this time is around 90psi.
I'm thinking that the blower is somehow making more boost than expected. I trust the gauge as this is a high quality electronic gauge that is mounted directly in the intake port that Comptech made for boost gauges. Additionally, the colder weather (35-50) makes the air denser and between the two could be creating a lean condition.
Any advice is highly appreciated.