dyno results

[Alxsmt]

finally got the beretta dyno tuned, running on megasquirt


before, on the ostrich (POS), with an internet road tune. cold day


and the dyno tune on MS. hot day

[robert 1980]

I know this dude who just dyno tuned his beretta it made over 200whp.I forget his name now.lol
Glad to see it's running better now=)

[ericjon262]

got any details?

[Alxsmt]

it still has minor issues but once I figure out how to reproduce them they will fix em for free. It does run better than it ever has lol, even with the 2.8

as in mods?
-3400 block
-3500 top end
-polished combustion chambers
-3 angle valve job
-comp cams springs 122# @ 1.750 and 283# @1.175, coil bind 1.040
-comp cams valve locks ans retainers
-reground cam 205.2/205.4@ .050 duration, 264/264@ .006 duration, .533/.533 lift, 110 lsa
-custom pushrods
-cyrogenic treated rods
-JE custom pistons with 10.5:1 compression
-paralled block
-2.5" mandrel bent exhaust with magnaflow muffler and cat
-modified and creamic coated S&S headers for a 99 grand am
-cool air intake to the bumper
-k&n cone filter
-solid engine mounts
-MRZ poly trans mount
-MRZ Billet oil cap
-Megasquirt 2, stand alone.
-Innovate LC-1 wideband
-flow balanced 28# injectors from a trailblazer
-balanced engine
-engineered performance LSD
-clutchmaster stage 3 clutch
-the drive shaft shop 400hp axles


and thats just what makes it go lol. slowly collecting parts for a turbo build, and lot more non engine related things

[ericjon262]

cool, I'm in the middle of a turbo LX9 build on my Fiero, I'm still thinking about a cam...

[3400-95-Modified]

so wait you lost 13hp going to the MS?

Looks like torque also dropped.

What issues are you having?

[robertisaar]

this dyno doesn't do SAE correction for air temps?

[Superdave]

Even with the correction there will still be some variation. The results do seem a little low considering your trap speeds though.

What does your timing table look like?

[Alxsmt]

yes on that day I lost power, this was tuned by a very well known local tuner. He told me on a cooler day I could see as much as a 15whp gain. This type of dyno is also the lowest reading dyno out there so that might be why my hp doesnt match the trap speed. I have yet to race with this tune.

at times when you stab the throttle it hesitates slightly, other times it takes off. not bad at all but its there. also sometimes the car likes to idle at 500rpm with a 10.5afr, its random and its usually fine. just gotta figure out how to reproduce it so he can tune in that area.

as far as air temp correction I guess not.

spark map is pretty low compared to what I thought. ill post a pic in a little bit. but it was made on the dyno, where the peak power was made in each cell is where it was set.

[Alxsmt]

yes I relise the 3d map is not positioned to match the 2d map.

only way to tell how it does is to hit the track and or get it dynoed on a cooler day like my first dyno.

[1988GTU]

That is how mine has ALWAYS acted and I tried tuning it, had a few people look at it, now I am taking to someone to tune it. If it doesn't get corrected, it'll just be a bipolar tune to live with.
However, my timing is set pretty high and it responds well.

By any chance does your car stall randomly a lot?

yes on that day I lost power, this was tuned by a very well known local tuner. He told me on a cooler day I could see as much as a 15whp gain. This type of dyno is also the lowest reading dyno out there so that might be why my hp doesnt match the trap speed. I have yet to race with this tune.

at times when you stab the throttle it hesitates slightly, other times it takes off. not bad at all but its there. also sometimes the car likes to idle at 500rpm with a 10.5afr, its random and its usually fine. just gotta figure out how to reproduce it so he can tune in that area.

as far as air temp correction I guess not.

spark map is pretty low compared to what I thought. ill post a pic in a little bit. but it was made on the dyno, where the peak power was made in each cell is where it was set.

[Alxsmt]

not a lot but it does do that. only when I come to a stop. I wonder if we both have a setting wrong or something stupid?

[Superdave]

pretty low on the advance compared to how i tune them but i'd trust the guy who is there and hearing/feeling the engine.


Sounds like it needs some fine AE tuning, not sure how that's setup in the MS though.



Here is the SA table from the last tune i sent you in 2009

[1988GTU]

not a lot but it does do that. only when I come to a stop. I wonder if we both have a setting wrong or something stupid?

I am open to suggestions. lol

[dskopek]

yes I relise the 3d map is not positioned to match the 2d map.

only way to tell how it does is to hit the track and or get it dynoed on a cooler day like my first dyno.

Alxsmt, Did you make sure that the trigger is in sync with TDC in the MS? When i did mine i found that my pickup was 6 degs off(slow) I made sure my TDC mark was right and then used a timing light to make sure when i told the engine to run at 16 degs it really was at 16 degs. If is not there is a adjustment tab where you can dial it in perfect. Just a thought in case it got overlooked.