Akina's build

[AKINA FC]

Apparently, I'm horrible at updates but I blame life   I should be starting it tomorrow barring any other issues! much excite! 

[digitalsolo]

That thing looks clinical!

[KCDAN]

After buying and autocrossing a new GR86 this year, my thought has always been that if the car had another 200 horsepower and some torque (LS) it may be one of the best cars ever created. It is certainly the best affordable sports car on the market today. This may be that perfect car.

[FC3S Murray]

Immaculate work! Well done

I remember when these cars first came out, there was a LA cop who did an LS3 swap immediately after purchasing it. He had nothing but good things to say about the cars behavior with the new power plant.

[Venom13132]

Answered my own questions.  I forgot this was not an RX7 haha

[Esser]

Looks good! With your current serpentine setup, you will need to crank down on the manual tensioner to about 30-ftlbs of tension, otherwise the belt will start slipping on the alternator on the shift- especially if you plan to rev over 7k rpm. That belt routing setup doesn't get much belt wrap on the alternator pulley. This is what I have experienced.

[AKINA FC]

Answered my own questions.  I forgot this was not an RX7 haha

Haha I want to know what the question was 

After buying and autocrossing a new GR86 this year, my thought has always been that if the car had another 200 horsepower and some torque (LS) it may be one of the best cars ever created. It is certainly the best affordable sports car on the market today. This may be that perfect car.

I'm hoping this is exactly what I end up with! I love my sons gr86, they feel identical.

Looks good! With your current serpentine setup, you will need to crank down on the manual tensioner to about 30-ftlbs of tension, otherwise the belt will start slipping on the alternator on the shift- especially if you plan to rev over 7k rpm. That belt routing setup doesn't get much belt wrap on the alternator pulley. This is what I have experienced.

That's good to know! I will add that extra bit of torque to it as this for sure is shifting much, much higher than that!

That thing looks clinical!

Thanks Blake! I'm trying!

Immaculate work! Well done

I remember when these cars first came out, there was a LA cop who did an LS3 swap immediately after purchasing it. He had nothing but good things to say about the cars behavior with the new power plant.

Thank you! Yeah, I read about a cop with a white one, probably the same guy! Being I have never driven the stock one in anger time will tell! but I hope it's all I'm after.

[AKINA FC]

It lives! Bad news is the haltech IO expander died so off for warranty, did not get to drive it as it died right as i was going to head out for a test drive.  it reads the wheel speeds and controls the shift lock along with reading the brake pressure which triggers the brake lights. Sounds good though!!

Really needs a bath and i guess I wont need to drive with goggles as I'll get the windows done this week, but over all she's done other than partner decals and numbers.

















Very happy how she looks in the sunlight!! 

[Cobranut]

That wing is hanging out over the bridge in the next county. 

Seriously, that's a sick swap.  Looks really cool. 

[digitalsolo]

Super cool!

I'm actually helping a friend with one of these (same color/generation) getting an LS3.   Just a street car, but should still be fun.

[Exidous]

How does the power feel with shorter headers(or are they manifolds) vs long tubes? On my LS1 I had gone from JTRs to Sikky mid length and the loss in lower end torque was noticeable. I wonder with the 440, would it still be noticeable.

[AKINA FC]

How does the power feel with shorter headers(or are they manifolds) vs long tubes? On my LS1 I had gone from JTRs to Sikky mid length and the loss in lower end torque was noticeable. I wonder with the 440, would it still be noticeable.

Probably is a loss in low end, not sure how much though. This thing blows the tires off from damn near idle, in 4th, so not much need for more low end torque 

[AKINA FC]

Well after a bunch of little issues to solve we have a functioning car now    So something helpfull for the hive, 2010 to 2015 tr6060's have a fully splined input shaft vs the 2016 to 2024 tr6060's, those have 1.125 less spline area. Just enough to not engage the second disc on a twin disc 





So off to the dyno!



and some of the main information everyone is here for 



Now a few things here on the dyno graph, almost didn't post this yet as it will be confusing for some but I'm excited that this is doing exactly what i wanted - this isn't the final numbers as I'm nowhere near done yet. The soft rev limit set to 7500 rpm (hard cut is bad for valve train longevity so I don't use it) so it starts to nose over about 7100 rpm, which is why it looks like that. The reason I set the rev limit to this is because for st4 classing its power to weight and since that means this engine will live a majority of its life at about 48-50% throttle I'm not turning it any higher than I need to help with longevity. This will make the max power I can have from 3900k rpm and up. I'll post the final graph here in a few weeks when I get back to the dyno. For max power I don't know where it will stop, my guess is about 7800 or so and it will nose over naturally, ill shut it down about 8500 if that's the case. The little 339 ci engine that could     

So, you're probably wondering what happened as to why it's not done, well.... Throttle body died, started out as just a redundancy error and then turned into it sticking and causing it to idle at like 2700 rpm plus causing faults and disconnecting still. So, after fighting with that for like 2hrs I said f this, took my ball and went home New OE throttle body on the way! 

https://youtu.be/tVQNDYqmnE8?si=2HaR3tyMV9Qo7AXO full power pull
https://youtu.be/ARi4vJXEuEY?si=o3Nid-4szhQk4A8P st4 power pull

[digitalsolo]

8500... is a lot of RPM.   Dang.

[Exidous]

Most GM throttles default to 20% unpowered. If it faulted out bad enough that'll get the rpm up for sure. My idle is around 13%. 20% would probably be around 3k. I'm having issues with quality control. Supposedly a genuine ac Delco 90mm but stick when hot. :-/