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Old 09-15-2020, 09:10 PM   #211
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If I really cared about being the quickest I would put a powerglide in it.
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Old 09-15-2020, 09:26 PM   #212
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Id be highly curious in seeing a dyno chart and the graph for torque.

I have a 86 @3150lb, so little heavier than stock. It runs arround 4.5s according log 60-100mph. Also one shift. Didnt dyno this thing yet, bit wouldnt expect much more than 400whp.

Would be highly intresting to compare the torque graphs of those two engines. I will see if I can get mine measured.
I think if you want to compare dynos or bench race then you should also consider your gearing setups too. His CD009 has shorter gears than your Magnum. He seems to be running the stock 4.1 final drive, and you are running a taller 3.58 setup. His more aggressive gearing would likely play to his advantage, meaning, even if you have a torque advantage down low, he will move quickly enough into boost and then he is gone.
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Old 09-15-2020, 09:28 PM   #213
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If I really cared about being the quickest I would put a powerglide in it.
Yeah, I'm sure there is a bunch of stuff that can be done to be the quickest when it comes to something like dragging.

I was just thinking you would want more usable power, but I totally get enjoying that big, late surge from a large turbo. It is a rush.
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Old 09-15-2020, 10:04 PM   #214
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So lets say you have a v8 that puts out 400lbs of torque at 4000 and you have a inline 4 that puts out 250 at 8000rpms.
Now lets gear the 4 cylinder down to 4000rpm by 2 to 1 ratio, the 4 cylinder now has 500ftls of torque at 4000rpms.
Hp is the measurement of this.
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Old 09-16-2020, 12:27 AM   #215
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Yeah, I'm sure there is a bunch of stuff that can be done to be the quickest when it comes to something like dragging.

I was just thinking you would want more usable power, but I totally get enjoying that big, late surge from a large turbo. It is a rush.
Boost will start at 3000 (.1lb)but its pretty linear till 5000rpms. (11lbs)

11.5lbs of boost at 5072rpms this is at 54.5% throttle at 50mph.

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Old 09-16-2020, 01:13 AM   #216
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Boost will start at 3000 (.1lb)but its pretty linear till 5000rpms. (11lbs)

11.5lbs of boost at 5072rpms this is at 54.5% throttle at 50mph.

Attachment 192831
I was just going off of this.

4k = 125hp and 150tq
5k = 210hp and 225tq

Not much happening, especially compared to the peak numbers, but if you are at 11.5psi at 5k then your plot is more to the left than the one you posted below by an extra 50-75hp or something.



Compared to this, there is more lag, but I get you, that late turbo rush pulling to redline is fun. Had a MKIV Supra. I dont recall another motor like the 2JZ pulling so hard straight to redline. Its fun.

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Old 09-16-2020, 01:25 AM   #217
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I was just going off of this.

4k = 125hp and 150tq
5k = 210hp and 225tq

Not much happening, especially compared to the peak numbers, but if you are at 11.5psi at 5k then your plot is more to the left than the one you posted below by an extra 50-75hp or something.


This is a dyno from a stock k24a8 engine with a gt42.
This is a stock accord engine without vtec
I also think it is wheel hp.

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Old 09-16-2020, 01:32 AM   #218
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This is a dyno from a stock k24a8 engine with a gt42
I also think it is wheel hp.
Yeah, whp implied. Your turbo is bigger with gt42 interior bits so more lag? I figure your cams, k20a head n stuff would help more on the top end, but whatever. You have it like you like it, which is all that matters.
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Old 09-16-2020, 01:49 AM   #219
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Yeah, whp implied. Your turbo is bigger with gt42 interior bits so more lag? I figure your cams, k20a head n stuff would help more on the top end, but whatever. You have it like you like it, which is all that matters.
Maybe I will be satisfied with the power then.
I plan on turning the boost up some more, around 30lbs.
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Old 09-16-2020, 02:32 AM   #220
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Originally Posted by Irace86.2.0 View Post
I think if you want to compare dynos or bench race then you should also consider your gearing setups too. His CD009 has shorter gears than your Magnum. He seems to be running the stock 4.1 final drive, and you are running a taller 3.58 setup. His more aggressive gearing would likely play to his advantage, meaning, even if you have a torque advantage down low, he will move quickly enough into boost and then he is gone.
Sorry, wasn't my intension to start forth and back calculating of torque vs ratio etc. In the end it comes down to weight and time. Everything else is just number gaming if you ask me. As well, I would say as long as there is the same number of shifts over a acceleration pull from and to same speed its not a matter of impotance, since it mathematically equals in the end as you already demonstrated.

Anyway, I think its very intresting to do some basic comparisons of those two worlds, especially beased on the same chassi. Log graphs of speed and calculated torque (or maybe even G load) vs time would be very intresting. Not in order to discuss if one is bette than the other, I wouldnt even think about making a judgement there. Just because I imagine its intresting to compare a mount Everest style torque graph to a dead mans cardiogram if you know what I mean.

Actualy I'm very intrested about the different behavior of this two worlds in one Chassis since I'm kind of already thinking about upcoming projects. My former cars also followed the turbo R4 concept. So Im absolutely not averse to the idea of a lighter engine with a more backward COG and big boost.

To be honest, I was expecting a bigger advantage in acceleration for the K24 swap, especially in a 60-100 scenario. The LS is also runing a H pattern since it is meant as a daily. For sure there are faster options also for the LS. But this doesnt made sence with the second aim given for this project what is drifting.

Anyway, I was thinking about potential follow up projects, thats my reason for intrest. As there is a FI on the LS, a R4 swap, R6 swap or H6 swap. Nothing to Start with next week, I planned over 2 years for the last project. Also Im not sure if it will be another 86 or a S14 in case I decide against the LS FI, what would be a addon for the current project. Since this additional project car is potentialy supposed to my wife and she is a S14 fan, it tends to not be an 86. For the S14 also online 4 turbo or LS are the low hanging fruits looking on my existing expirience. Or I start over with something New for me and go inline 6. As well, a FI LS daily would be more feasable in the S14. On the other hand I dont know if I want to see my wife driving this while sitting in a NA LS. Hard decissions to be made...

So, long story short, hope the K24 will develop further and hope to see some more facts. A good documentation about the wiring solution and Integration of the 86 ECU would be great.

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Old 09-16-2020, 07:52 AM   #221
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One of my logs 60-80mph was 1.459 seconds
It runs pretty well.

How a k24 turbo performs will depend mostly on turbo size. Smaller will have less hp but it will have torque sooner, larger will have more hp but torque later at the same boost.

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Old 09-16-2020, 01:01 PM   #222
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I'd run a 2871R on a 1.8L 20V. Spool rpm mssively changed with A/R and header design. Startet with a self made steel header and A/R .82 or something. Ended up with a shock charging manifold (hope thats the correct Translation) and A/R .62. Peak power Was nearly idendical while spool rpm was lowered ~3750 to below 3000rpm. Engine wasnt meant for max output, only 6700rpm redline. Something about 400whp as a daily. But also had that pretty sudden torque kick. To be honest, I also was thinking about this engine in the 86 before I decided for the excurse into displacement country...

Keep posting times and data please, very interesting!
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Old 09-16-2020, 09:20 PM   #223
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Acceleration 1.74gs at 46mph and a 1.8gs at 48

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Old 09-17-2020, 11:28 AM   #224
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Wow, impressive numbers! I saw you are also running the RS-R. I was massively impressed by the traction they generate when i drove them first time. But I guess I would never be able to achive that high Gs. Where did you achive this numbers? Was it on a drag strip? That would be a potential 1,5-2s (plus shift time) to 60mph time!
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