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Dyno ChartsThis forum is for posting of your Dyno Charts. You will use a prefix to designate your Cubic Inches. When posting please include all model year, Cubic Inch and modifications in the thread title and in the body when posting your Dyno Charts.
These were the timing tables that they created for my motor. I didn't agree with them... I thought for a wide open throttle run based on throttle position and RPM that these numbers were way too low..
Last edited by 98hotrodfatboy; May 31, 2022 at 04:05 PM.
They definitely did do so me tuning, My high heat problems were corrected but the bike just seemed sluggish. and after looking at the timing tables for a WOT run, the timing was definitely low.. At least I thought it was.. I'll try to post up the timing charts..
I can't believe I missed that.. I took for granted that it was a 5250.. I myself never seen that.. Personally I like the AFR's a little higher.. Not seriously concerned about heat as long as it stays below 270 cruising.. In my book which is a short story, Lean is mean without creating hi heat situations.. Just so you know my current cruising temps are now in the high 250's..
I would like to do that but I've been out of work for 7 months now.. And as I stated in marcodarqs post I was a bit surprised as how low the timing was for a wide open throttle run.. Well at least to me it was low, coming from the Evo world.. People tell me that the TC's don't require as much timing but I'm not too sure about that.. Look at it this way, too low of timing creates more heat build up in the motor so why would it be set lower than an Evo..
Post the table.. It don't make any difference where the TQ/HP cross when the scales are not the same.
ADD:
Sorry about your situation but the only way another run would have been useful is if it was done back to back with the 2 posted runs.
Evo timing on my bobber is set to 27 degrees. 30 and it overheats.
Last edited by Max Headflow; May 31, 2022 at 04:12 PM.
Post the table.. It don't make any difference where the TQ/HP cross when the scales are not the same.
I see that, as in where they're crossing.. And that does bother me.. Not sure what to trust right now.. Maybe when I get a little more cash I can do it again else where... In the mean time these are my timing charts that I am currently running and I really like the response.. Although I also had to increase the VE tables for the front cylinder.. They were a lot lower than the rear almost 15% which didn't make sense to me..
these are my current timing charts...
Last edited by 98hotrodfatboy; May 31, 2022 at 04:19 PM.
What is your compression ration?
for WOT your values are not too low.....maybe not low enough even, hence why i, asking about your compression ratio,,,,,,,,take a trip down here to Florida........
m
I see that, as in where they're crossing.. And that does bother me.. Not sure what to trust right now.. Maybe when I get a little more cash I can do it again else where... In the mean time these are my timing charts that I am currently running and I really like the response.. Although I also had to increase the VE tables for the front cylinder.. They were a lot lower than the rear almost 15% which didn't make sense to me..
There is no reason not to trust the output. Nothing wrong with the relationship between HP and TQ.. Take a HP reading off the graph and calculate the TQ. Compare that to the TQ for the same RPM on the graph.
As far as timing goes, Those numbers look reasonable to me but I'm not a Speed / Density guy..
One thing I'd guess is that the ECM took away timing due to ping sensing on the 6th gear run.. That issue I stay away from.. Maybe Jason has something to say? I suspect that a good dyno guy would be collecting data during that run and would know..
I ran the W5 in my 07 egc. Close to the same build. Throttle body stock. Syke heads (1.9 intake flowed 260 at 28). 9.9 to 1 cr. 0.040 squish and 3 different pipes. The first pipe, before and after tune shown here, was a older Bassani 2-1 pipe that had a full circle twist on the rear cylinder header and supper trap added to the end. (Nice and quiet ) . (Made like 5 to 6 HP less than a Fatcat with quiet baffle. )
Yellow dots were start, White final. Liked 30 degrees.
What is your compression ration?
for WOT your values are not too low.....maybe not low enough even, hence why i, asking about your compression ratio,,,,,,,,take a trip down here to Florida........
m
Compression is at 10.16:1 and I would love to go down to Florida but it ain't in the cards.. Some day soon though..
Originally Posted by Max Headflow
There is no reason not to trust the output. Nothing wrong with the relationship between HP and TQ.. Take a HP reading off the graph and calculate the TQ. Compare that to the TQ for the same RPM on the graph.
As far as timing goes, Those numbers look reasonable to me but I'm not a Speed / Density guy..
One thing I'd guess is that the ECM took away timing due to ping sensing on the 6th gear run.. That issue I stay away from.. Maybe Jason has something to say? I suspect that a good dyno guy would be collecting data during that run and would know..
I have recorded Logs of WOT runs with the timing up in the range of the low thirties and once I saw that the ECM took out 1.5* for a brief period.. Nothing to kill a run.. I don't see or understand the need to reduce the timing like many have said.. To me it defeats the purpose of the build.. there is a huge difference in power at 4000 rpm and 28* n of timing compared to 4000rpm and 17* of timing .
I ran the W5 in my 07 egc. Close to the same build. Throttle body stock. Syke heads (1.9 intake flowed 260 at 28). 9.9 to 1 cr. 0.040 squish and 3 different pipes. The first pipe, before and after tune shown here, was a older Bassani 2-1 pipe that had a full circle twist on the rear cylinder header and supper trap added to the end. (Nice and quiet ) . (Made like 5 to 6 HP less than a Fatcat with quiet baffle. )
Yellow dots were start, White final. Liked 30 degrees.
That timing is respectable.. 30*@3200 rpm is where it's at.. with your comp that low (and I'm not saying it's low) you can run even more timing but with the heads only following 260 cfm your probably right where it was happiest.. That's a very nice Dyno run... With .030 squish you definitely could add a few more * of timing.. But still it looks great... And In a heavier bike even better.. I'm sure it was a lot of fun..
Last edited by 98hotrodfatboy; May 31, 2022 at 06:11 PM.
That timing is respectable.. 30*@3200 rpm is where it's at.. with your comp that low (and I'm not saying it's low) you can run even more timing but with the heads only following 260 cfm your probably right where it was happiest.. That's a very nice Dyno run... With .030 squish you definitely could add a few more * of timing.. But still it looks great... And In a heavier bike even better.. I'm sure it was a lot of fun..
You gonna hate this but I was mistaken about the cam.. The cam was a Syke SP232 which had similar timing to the W5 but 8 more degrees of exhaust duration.. The previous run was with the W5 and it seemed to like 28 deg total advance.. Also the previous W5 runs were with Rhinehart TD.
ADD:
It kind of shows me that the motor can tolerate more ignition if the exhaust timing is longer. At least in this case..
Last edited by Max Headflow; May 31, 2022 at 06:34 PM.
