Where is my top end power?
#21
Really check the hell out of all your couplers, and make sure your cams are lined up correctly. I had a turbo volvo that did about the same thing, and the cam was off. The turbo would glow red as hell and it would boost fine, it was just down on power. Also, I can't tell you how many times I have just quickly eyeballed all of my turbo couplers and they looked fine at first, then I realized I had a split paralell with the edge of the hose clamp.
#25
It's ok, I thought mine was off since I decided not to plug in my coils. Anything can **** you.
https://www.miataturbo.net/showthrea...+douche+pickle
https://www.miataturbo.net/showthrea...+douche+pickle
#26
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If your cams are advanced it will move your torque and hp peaks toward the lower RPM range. I'm going to start there with all other things being equal.
+1 on wanting to see cam gears pics to verify timing.
+1 on wanting to see cam gears pics to verify timing.
#32
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Updates: We checked the cam settings and timing and it is according to specs. We also checked for clogged exhaust/Cat/flex pipe/resonator and there is nothing wrong with it. I did boost leak check and there a no boost leak.
Giving the benefit of the doubt that the above are not the problem since we went through each item carefully, I will next run the car again on the dyno without water injection.
Will update with my findings.
Giving the benefit of the doubt that the above are not the problem since we went through each item carefully, I will next run the car again on the dyno without water injection.
Will update with my findings.
#35
give us the specs on timing water input amount and we can help. Did you check the motor over for a bent rod before you swapped **** out? I know my motor lost alot of power uptop especialy when i had 3 bent rods in it. Lean that damn afr up to 11.5 atleast man 9-1 is not good for making power if i am reading your chart correctly.
#36
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- Ran compression test today. Seems healthy across cylinder.
- Switched off water injection, slight difference
- retuned adaptronic ECU, made 30bhp more but I am still down by 30 bhp from another car on the same engine, same turbo, same ECU, different exhaust manifold (me flyin miata and him eBay), i have a visually more restrictive downpipe
Here is the result:
(Red after retune, Blue before)
(Blue - my current setup, red is the other car on the same setup, pink is before my 1.6-1.8 engine swap)
I am going to redo and turbo outlet, run 3" till the end and see if it makes a difference.
Just a note, the car runs perfect, no misfiring and idles perfect
Will update after my next change.
- Switched off water injection, slight difference
- retuned adaptronic ECU, made 30bhp more but I am still down by 30 bhp from another car on the same engine, same turbo, same ECU, different exhaust manifold (me flyin miata and him eBay), i have a visually more restrictive downpipe
Here is the result:
(Red after retune, Blue before)
(Blue - my current setup, red is the other car on the same setup, pink is before my 1.6-1.8 engine swap)
I am going to redo and turbo outlet, run 3" till the end and see if it makes a difference.
Just a note, the car runs perfect, no misfiring and idles perfect
Will update after my next change.
#37
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dude there are lots of variables that you might be overlooking. things like a messed up compensation factor, humidity, a wacky ems trim etc.
Also, compare your damn timing maps. It may be the same tuner but they may have screwed something up.
It could also be something related to your boost control. One performance tuning aspect that is often overlooked is boost control. Boost control has a HUGE effect on performance. That missing HP could easily be caused by a crappy boost controller or um lazy wastegate or something. Or even a vacuum signal line that is too small.
I appreciate your HP quest, but chasing someone else's dyno graph requires more attention to detail than you are putting in.
Also, compare your damn timing maps. It may be the same tuner but they may have screwed something up.
It could also be something related to your boost control. One performance tuning aspect that is often overlooked is boost control. Boost control has a HUGE effect on performance. That missing HP could easily be caused by a crappy boost controller or um lazy wastegate or something. Or even a vacuum signal line that is too small.
I appreciate your HP quest, but chasing someone else's dyno graph requires more attention to detail than you are putting in.
#38
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Fair enough. You have a point. But the quest is not about chasing another person's dyne map. It's about missing 30bhp from the same setup. Both cars are based on the same ecu base map with the same compensation, trim etc. Dyno environment is the same because it is on the same dyno with the same load/gear/dyno variable.
Like I mentioned previously, everything about this 2 cars are similar, down to the damn vacuum line and even same brand of boost controller(BLITZ to be exact). The only differences are what I mentioned previously in this thread.
I have gone through every variable suggested by good people here and am will try other means. At this point, the purpose of updating this thread so that others can reuse the experience I went through.
Like I mentioned previously, everything about this 2 cars are similar, down to the damn vacuum line and even same brand of boost controller(BLITZ to be exact). The only differences are what I mentioned previously in this thread.
I have gone through every variable suggested by good people here and am will try other means. At this point, the purpose of updating this thread so that others can reuse the experience I went through.
#39
I think it looks like a wastegate issue. Are you both pulling your boost control signal from the same location? Before/after the intercooler. Are you pulling your MAP signal from the same point? While on the dyno there was a 1psi difference between where I pull the MAP at the back of the intake manifold, and the front where the tuner pulled it. (could be as simple as different map sensors, but something to think about)
#40
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Fair enough. You have a point. But the quest is not about chasing another person's dyne map. It's about missing 30bhp from the same setup. Both cars are based on the same ecu base map with the same compensation, trim etc. Dyno environment is the same because it is on the same dyno with the same load/gear/dyno variable.
Like I mentioned previously, everything about this 2 cars are similar, down to the damn vacuum line and even same brand of boost controller(BLITZ to be exact). The only differences are what I mentioned previously in this thread.
I have gone through every variable suggested by good people here and am will try other means. At this point, the purpose of updating this thread so that others can reuse the experience I went through.
Like I mentioned previously, everything about this 2 cars are similar, down to the damn vacuum line and even same brand of boost controller(BLITZ to be exact). The only differences are what I mentioned previously in this thread.
I have gone through every variable suggested by good people here and am will try other means. At this point, the purpose of updating this thread so that others can reuse the experience I went through.
What about the timing and timing trim maps?