Power loss?
 

I have 2013 BNRS3, new engine with 12k on it...

I have a 93 map that in november i was putting 330whp, loaded same map and now 4 months later with the same map im putting about 270 whp... (all Vdyno)

I know that temperatures have to do with power but DAMN 60whp?

IAT and Bats are 20Degrees apart on logs from november and now, other than that, everything else looks normal..... (ill upload logs later when i get home)

First thing i did was to do a compresion test and got 165 on all 4 cyls (cold engine and without gas pedal to the floor) i know it sounds low but used a autozone tester so that might be the reason, But at least is consistent so i doubt is that.

I want to do a leakdown test next.... Any Ideas on what else should i check?

http://tapatalk.imageshack.com/v2/15...e3cde55a21.jpg

Edit: Added Logs

What EM/DP are you running? What boost are you targeting? Post some WOT logs.

Nice ninja edit.

Boost is meeting its targets perfectly, I thought about a clogged catalyst converter but the guy who sold it to me said it had 10k and I put about 8 more so I don't think is that... CA you see the image with vdyno I'm not sure I posted it right ?
Edit: stock EM, Waiting for xs power to solve that

Can see the VD now.

When my cat was clogged, my VD looked like this. When I switched to a catless DP, the VD looked like this, no change to the tune whatsoever.

It does not look like your spool is super slow like mine was, but your tune is most likely set up a bit different from mine. Or maybe the cat is clogged only a little bit, my was completely fubared.

I have a catless dp sitting at Home.. I just don't want to replace it without knowing... I'll post logs in a few, found them in my email

No one.. For real?

Your car is not warmed up, look at your coolant temps, especially in the first log. Let your coolant reach around 180 and it will probably take another 5-10 minutes for the oil to come up to the operating temp. Then take WOT logs.

This because I did that log omw to work around 6am,because the temps at that time area lot lower than when I come back, so I let it run for 1.5 minutes and then did a log, I wanted to see if the temp were the issue... Sadly they werent

In your older logs, was your intake valve advance that high throughout the RPM range? Seems high to me. Plus your timing advance looks low as well

If something has made those change, it might be the cause of the loss of power

the timing is moderate on that map, like 9 at 5.5k, intake valve advance.....??? You lost me there

The column with Intake Valve Adv. (°) heading. I thought those usually went below 0 early in the RPMs on a WOT run. I quit logging those on mine, so don't have one to compare to

Could be the plugs? They didn't look that bad... Attachment 194417

VD is heavily dependent on environment- things like ambient temps, humidity, even a stiff breeze can and will result in significant differences in the reported power numbers. If there are changes in elevation like running up or down hill you will also see differences. Even things like tire size or differences to occupant weight (your weight +any other passengers & other items items like tools or speaker box) can have a large impact.

At the very least you need to set the SAE values like ambient temp when comparing runs seperated by several months.

I have thought about most of those facts, but do you think that all of that could produce a 60whp difference?
I do know it was a lot colder in November but that's about the only Difference between logs scenarios.... car drives fine but I do can feel it a little less responsive.

We're these logs taken on the same road? 19psi and 10* of timing on a bnr typically won't make 330hp. So I would say one of the logs was not done on a consistent surface

Yes, both were on the same road, I now remembered that I had 225s when I did that first log, I now have 235s I'll make the changes on VD but I doubt it would be a lot of difference, maybe 8 or 9 hp, plus I didn't adjust the temp either ... It was around 60 del when I did that first log... I'll go home, Make The changes and post back thanks

Ok, I adjusted VD and Also found 2 logs from the previous revision and they were lower than that one as well. so im guessing that log was a one thing get the owner happy and proud occasion =\.

Thanks everyone

I have logs that show more HP when I had just an intake and tune then I do now with stage 2 ... Don't be sad

I hate tapatalk 4.11

if I was you I would just continue with logging pulls its possible you had a false positive on your first pull

Quick Update: I used a better gauge and did another compression test, got a lot better results, I can sleep well now =)

Based on the difference in readings between your first and second compression test, I almost suspect that first tester of having the wrong type of valve core in it.

Compression testers use a special core with a relatively weak spring pressure. I've never come across a suitable replacement in a brick and mortar store -- they usually have to be specially ordered. If you put a valve core meant for a tire (much stronger spring pressure) in a compression tester you'll end up with low readings.

Since tire valve cores tend to be readily available it's a common mistake i've seen.

Just a heads-up... Not sure this actually applies to what you experienced.

It might`ve been, Just heads a up to everyone, those free loaners testers arent always good, ppl get them and beat them who knows, i know that now im happy, after the test with a better gauge