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Old 03-03-2020, 11:18 AM   #26
linuxman51
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back in the shop with fresh gas! gonna see what LH has learned over the past ~150 miles, and then probably play with boost controllers.
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Now with in-house Dyno tuning!

Megasquirt Tuning!
Plug and play LH 2.4 Megasquirt, now with stealth mode!
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Old 03-03-2020, 12:21 PM   #27
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Looking forward to it.
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Old 03-03-2020, 01:28 PM   #28
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Me too!
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Old 03-04-2020, 12:08 AM   #29
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sneak peak: got all three boost controllers tested. there was a definite winner. Also, over 150 miles.. LH did not learn anything. (I know, spoiler alert)
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Old 03-04-2020, 01:20 AM   #30
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Crank that:
https://youtu.be/5Zh_stQg-Ik
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Old 03-04-2020, 01:32 AM   #31
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Finally an answer to an age old inquiry
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Old 03-04-2020, 10:10 AM   #32
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Mmm, truck powerband. Interesting to see LH produce an almost proportional level of fuel with added boost. I'd be curious to see where it's tracing from on the main fuel map during a pull.
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Old 03-04-2020, 10:22 AM   #33
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Mmm, truck powerband. Interesting to see LH produce an almost proportional level of fuel with added boost. I'd be curious to see where it's tracing from on the main fuel map during a pull.
soon.....
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Old 03-04-2020, 11:58 AM   #34
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sneak peak: got all three boost controllers tested. there was a definite winner. Also, over 150 miles.. LH did not learn anything. (I know, spoiler alert)
Well, it wasn't breaking up over 5500rpm, or whatever was happening before. It goes into closed loop in much boost, so it can't really learn much up there unless you're driving it abnormally(high rpm, low/no boost). It can learn things at lower load, though. In my personal NA car's experience, I would need to drive it with the RPM really high (4-6000rpm) when just cruising at lighter loads to get it to see that it's too rich up there (even at light loads), then it would lean out the high rpm range at WOT as well. I picked up a couple HP over 5500rpm or so by doing this when it was only making 110hp or something. I don't know if the same will apply on a turbo car's tuning because I haven't studied their main fuel map, really.

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Finally an answer to an age old inquiry
What inquiry is that?
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Old 03-04-2020, 01:04 PM   #35
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Closed loop vs open loop is dictated by airflow though, and as such it's kinda hard to get it to high rpms without tripping that threshold (another reason I'm just going to start tooning the LH instead of relying on it's good graces).

I was a little surprised to see it still be plenty rich even at almost 20psi out the top, but I suspect a lot of this has to do with the poor state of the exhaust post-cat (the piping up to that point isn't bad really). I may slide up under there this evening before dinner and sneak a couple runs in just to see where it's at with open downpipe.. see what the boost does, that sort of thing. The 3 way boost controller test is uploaded, I need to go finish editing the tags and such before it auto-publishes.. but the cheapest one was the best one lol.
It knocked pretty good a couple times cranked up that high, so obviously one should not go full send, but it was interesting to see. Reckon I need to sort out what intercooler I want to run, the NPR I guess should be pretty high on the list since this car is set up with the old style intercooler/radiator/etc
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Old 03-04-2020, 01:42 PM   #36
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Can't wait!
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Old 03-04-2020, 05:04 PM   #37
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Really enjoying this. Based on the findings so far and future LH/MS comparison, I have a feeling I'll be going to Microsquirt in the future on the dd.
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Old 03-04-2020, 11:23 PM   #38
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Quote:
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Can't wait!
results once again surprising (to me)
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Old 03-05-2020, 12:38 AM   #39
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video:
https://youtu.be/42-lMnOPP4Q

posted the graphs in showroom, the long and short of it is the peak numbers moved about as much as they did with open downpipe and stock boost (Which was also a bit of a surprise tbh). Carried it out the top a bit better, but not great. still mid 10's afrs.

boost did jump a couple psi on the hit, so for it to only go up the amount it did is likely more of a testament to the state of tune in the stock ecu(s). reckon that will be the next video, this is just... sad lol
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Old 03-06-2020, 12:37 PM   #40
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That is indeed interesting that with the increased flow from double the boost, the open downpipe makes such a minor difference. So much for getting a ton of HP out of an exhaust.
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Old 03-06-2020, 12:40 PM   #41
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@linuxman51, thanks for doing this project. I appreciate the documentation!
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Old 03-06-2020, 02:50 PM   #42
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Quote:
Originally Posted by klr142 View Post
That is indeed interesting that with the increased flow from double the boost, the open downpipe makes such a minor difference. So much for getting a ton of HP out of an exhaust.
I'm hesitant to throw out sweeping predictions now (hah, burned twice already!), but I'm thinking that perhaps with some tooning, the power out the top will separate more. holding on to 20ish whp out the top isn't bad, but it's not particularly amazing either. Of course, toonin' will also improve the power with the full exhaust as well, so maybe not. It's twice made me a liar, so I'm not too keen on making predictions right now lol


I'm trying to work out a way to see how the intercooler is holding up, thinking about using a microsquirt as a data acquisition box (instead of coolant temp, have it get pre and post IC IAT's, that sorta thing), could probably use a couple inputs to compare pre and post map readings (more for consistency of data. I could also move the dyno's map sensor to pre-turbo and see what's really going on over 2 runs).

I do also need to spend the time and build a p&p harness for it before I stray too far from stock, it's been a long time since I've updated my stock lh base map.
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Old 03-06-2020, 02:57 PM   #43
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T cam needs to go bye-bye ASAP. That thing is a major, major chokepoint.
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Old 03-06-2020, 04:52 PM   #44
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Quote:
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T cam needs to go bye-bye ASAP. That thing is a major, major chokepoint.
But, what about checking the valve adjustment, setting it tighter and retarding the cam 4° first? Hah! I would, but that's maybe a bit excessive at this point. Might as well, yes, just toss in an IPD Turbo cam.
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Old 03-06-2020, 07:13 PM   #45
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hard to do cam timing changes without the ol adjustable gear lol. anyone got one for sale?
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Old 03-06-2020, 07:28 PM   #46
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T vs A vs K cam and also KL racing intercooler

Thought this was interesting and maybe worth a read for those who are following along this thread.
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Old 03-06-2020, 08:51 PM   #47
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https://www.stsmachininginc.com/coll...o-b21-b23-b230

STS gears are $100(!) right now.
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Old 03-06-2020, 09:54 PM   #48
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What the people really want to know is T cam vs. M cam.

(I'm the people)

Folks on here like to talk about putting a T cam in an NA car like it's some kind of secret upgrade but looking at what my dad and I have measured for both I really can't see how the M wouldn't be a mild upgrade from the T.

Or just throw an IPD Turbo cam in there and be done with it. That would be good too.
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Old 03-06-2020, 09:56 PM   #49
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Didn't Nick mess with cam timing on the Dyno? Think he ended up with straight up making the most power
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Old 03-06-2020, 10:03 PM   #50
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Do you have an NPR intercooler on hand for the upgrade?

If not, PM me (I have one).
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