follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Engine Swaps

Engine Swaps Discussion of engine swaps.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-06-2022, 10:23 AM   #309
toast
Senior Member
 
Join Date: Jul 2014
Drives: 14 BSP Edelbrock BRZ
Location: Lon Gisland
Posts: 806
Thanks: 113
Thanked 450 Times in 256 Posts
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
After I put a supercharger on my car it was intermittent when starting (as in no crank). Very annoying, would leave me in various places. Finally realized I never tightened the 10mm bolt on the battery ground terminal and it was loose...
toast is offline   Reply With Quote
The Following User Says Thank You to toast For This Useful Post:
Irace86.2.0 (04-06-2022)
Old 04-14-2022, 01:04 AM   #310
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
I went back to the dyno today at Sonny's with Shawn from TunedByShawn. The first pull looked really smooth compared to the last pull (here), and the only difference was the new flywheel. (Old vs New):
Attached Images
  
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
The Following User Says Thank You to Irace86.2.0 For This Useful Post:
captain awesome (04-14-2022)
Old 04-14-2022, 01:30 AM   #311
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Here are few of the final pulls. This was 9psi. The ID1050x injectors were maxing out, and this is where I wanted to stop anyways (400whp/300wtq). Shawn thought the graph could be smoother, and he thought the injectors could do more, but we were chasing a shifting problem. It seemed like boost was cutting out. Maybe a boost leak, and I had on my list to replace two of the o-rings that seemed smaller than ideal, but after looking at things, he says the problem is the fuel pressure. He says it is dropping, which is common in a returnless fuel system without a boost reference pressure regulator.

I believe the manual says the stock fuel system has a pressure around 51-73psi with a fail safe or something of 58psi. After removing the stock fuel pump controller, the pressure seems to stay at 60psi. Well, it was a good thing I got the fuel pressure sensor because the system was detecting lower fuel pressure and adjusting the duty cycle on the injectors or something like that. He says the pressure was dropping into the 40's or something, so a return, referenced system would be advisable for more power. As you can see from the graphs above, it can be decently smooth, but it seems to be fighting to adjust things when fuel pressure drops. At least, that is what I am understanding.

I'll look into the fueling setup. I know @visbits and others have switched to a return system, but I am not really wanting more power at the moment, and the tune is safe and fine for now, I am told. Overall, I am pretty stoked the car made what it made at only 9psi on a relatively small turbo with plenty of future overhead for more power if I want. Car feels smooth and strong.
Attached Images
    
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
The Following 10 Users Say Thank You to Irace86.2.0 For This Useful Post:
BrahmaBull1990 (04-18-2022), brandonblt2 (06-19-2022), captain awesome (04-14-2022), DarkPira7e (05-16-2022), Jdmjunkie (04-14-2022), jongers (07-28-2022), Mike_ZN6 (04-14-2022), RedReplicant (06-04-2022), soundman98 (04-14-2022), Stonehorsw (04-18-2022)
Old 04-14-2022, 12:52 PM   #312
redlined600
Senior Member
 
redlined600's Avatar
 
Join Date: Nov 2014
Drives: Fr-s
Location: MN
Posts: 731
Thanks: 122
Thanked 492 Times in 266 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
That thing must be a rocket!
__________________
redlined600 is offline   Reply With Quote
The Following User Says Thank You to redlined600 For This Useful Post:
soundman98 (04-14-2022)
Old 04-14-2022, 02:40 PM   #313
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
^^^This.

A 997.2 GT3 is rated at 435hp@7,900rpms with a curb weight around 3,075lbs, and the car dynos around the 400whp/300wtq. The drivetrain losses might be less for the 911 than for a typical RWD car, but I would expect 15-20% and the car to be underrated from Porsche. A 992 GT3 is rated at 503hp@8,400rpms with a curb weight around 3,125lbs, and the car dynos around 450whp/325tq. I don't know what my car weighs, but I think I am looking good from a power-to-weight perspective.
Attached Images
  
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
The Following 2 Users Say Thank You to Irace86.2.0 For This Useful Post:
brandonblt2 (06-19-2022), jongers (07-28-2022)
Old 04-14-2022, 10:09 PM   #314
brzlegend
Member
 
Join Date: Sep 2021
Drives: brz
Location: Tennessee
Posts: 55
Thanks: 4
Thanked 10 Times in 9 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
You should see 49psi with 9psi oem is 58. If your going below that your fuel pump isnt up to the task.
You can squash the regulator can and get a little more base psi. That's how the factory sets the pressure.
How does it compare to the supercharger?
brzlegend is offline   Reply With Quote
Old 04-14-2022, 10:54 PM   #315
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by brzlegend View Post
You should see 49psi with 9psi oem is 58. If your going below that your fuel pump isnt up to the task.
You can squash the regulator can and get a little more base psi. That's how the factory sets the pressure.
How does it compare to the supercharger?
I have the DW300c. I think it should be good with that pump at this power level. I'm not making too much more power than what I was making with the Harrop supercharger at 14.5psi.

The supercharger is more immediate and linear. It feels more NA. The turbo has more torque and is more drama with the surge and noises. Both have their benefits. I would probably prefer the FA24 with a Harrop supercharger because I like immediate throttle response and because this turbo and low boost level doesn't have crazy boost/torque buildup, so there isn't as much drama; might as well have the supercharger without the turbo lag/threshold if the torque curves are identical. With that said, the power is a blast, and I like the 8k redline and setup, so no regrets. It is far more upgradable in power potential if I want to move to the next level.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
Old 04-15-2022, 12:03 AM   #316
brzlegend
Member
 
Join Date: Sep 2021
Drives: brz
Location: Tennessee
Posts: 55
Thanks: 4
Thanked 10 Times in 9 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Harrop built 2.1 fa20 on e85 @16psi 364hp and 307 lb ft. You have that beat with 7 psi less boost.
brzlegend is offline   Reply With Quote
Old 04-15-2022, 10:35 AM   #317
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by brzlegend View Post
Harrop built 2.1 fa20 on e85 @16psi 364hp and 307 lb ft. You have that beat with 7 psi less boost.
They made more horsepower than that. They didn’t rev it out, which is why they made so much more horsepower when they did rev is out at 19psi for 428hp and 335tq at the hubs. For reference, Kpower made 470whp and 385wtq at 12psi on a K24z3 using the same turbo, but I’m guessing a larger a/r than the .72 that I have on my Pulsar replica, and I doubt they ran a factory cat like me either.

The extra 300cc, 8k rpm redline and the greater efficiency of the turbo are some advantages. The Harrop has that perfectly linear power curve and smooth torque curve and instant throttle response, which is their advantage. They create more cylinder pressure and heat for the same power to the wheels, so a turbo is going to be easier on the engine. Still, the urgency and response from a positive displacement supercharger is a great thing.
Attached Images
    
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
Old 05-01-2022, 05:15 PM   #318
visbits
Member
 
Join Date: Sep 2021
Drives: Garbage.
Location: Cincinnati
Posts: 23
Thanks: 0
Thanked 21 Times in 16 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
RE: Flywheel
Yeah I had ARP bolts cause a problem too, I noticed the change in sound and took it apart before it was too late. I replaced with a steel flywheel and OEM bolts with LT Red.



Quote:
Originally Posted by Irace86.2.0 View Post
Here are few of the final pulls. This was 9psi. The ID1050x injectors were maxing out, and this is where I wanted to stop anyways (400whp/300wtq). Shawn thought the graph could be smoother, and he thought the injectors could do more, but we were chasing a shifting problem. It seemed like boost was cutting out. Maybe a boost leak, and I had on my list to replace two of the o-rings that seemed smaller than ideal, but after looking at things, he says the problem is the fuel pressure. He says it is dropping, which is common in a returnless fuel system without a boost reference pressure regulator.

I believe the manual says the stock fuel system has a pressure around 51-73psi with a fail safe or something of 58psi. After removing the stock fuel pump controller, the pressure seems to stay at 60psi. Well, it was a good thing I got the fuel pressure sensor because the system was detecting lower fuel pressure and adjusting the duty cycle on the injectors or something like that. He says the pressure was dropping into the 40's or something, so a return, referenced system would be advisable for more power. As you can see from the graphs above, it can be decently smooth, but it seems to be fighting to adjust things when fuel pressure drops. At least, that is what I am understanding.

I'll look into the fueling setup. I know @visbits and others have switched to a return system, but I am not really wanting more power at the moment, and the tune is safe and fine for now, I am told. Overall, I am pretty stoked the car made what it made at only 9psi on a relatively small turbo with plenty of future overhead for more power if I want. Car feels smooth and strong.

I setup my car around 91/93 0-Ethanol gas because that's whats available around tail of the dragon.



93 Octane 11:1CR K24A 21Psi. Lot of boost to compensate the lack of any available timing window on this engine. I am going to reduce my CR to 10:1 or 9.5:1 and balance the rotating assembly soon, its the current restriction of making power without meth/etha.


This is a properly calibrated AWD 500 Mustang dyno, you can safely add another 15% on this for a "dynojet" comparison.
Attached Images
 

Last edited by visbits; 05-01-2022 at 05:32 PM.
visbits is offline   Reply With Quote
The Following 2 Users Say Thank You to visbits For This Useful Post:
Irace86.2.0 (05-01-2022), RedReplicant (05-02-2022)
Old 05-16-2022, 10:19 PM   #319
funkjaw
Senior Member
 
Join Date: Sep 2017
Drives: 16' WWB
Location: Austin, TX
Posts: 175
Thanks: 209
Thanked 126 Times in 61 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Any acceleration videos by chance?
funkjaw is offline   Reply With Quote
Old 05-17-2022, 02:23 PM   #320
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by funkjaw View Post
Any acceleration videos by chance?
No. Sorry.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
Old 07-12-2022, 11:59 AM   #321
pgranberg11
BoostedBRZ
 
Join Date: Mar 2014
Drives: Turbo BRZ
Location: IL
Posts: 689
Thanks: 171
Thanked 258 Times in 190 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
great build. love the pics and documentation. I know I've commented here a few times, but good luck with the oem transmission. I'm curious how long that will last you. When I was fa20 turbo'd my 4th gear broke at 350whp/257wtq, but all I did was track the living hell of that. I had 30 track days alone last year and it was turbo'd 3 years before all that with more track days in between. good luck and love this thing!!
pgranberg11 is offline   Reply With Quote
The Following User Says Thank You to pgranberg11 For This Useful Post:
Irace86.2.0 (07-13-2022)
Old 07-20-2022, 01:53 PM   #322
FrickingReallySlow
Senior Member
 
Join Date: Jun 2021
Drives: 2015 FR-S
Location: San francisco
Posts: 356
Thanks: 144
Thanked 154 Times in 101 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
How well could the stock motor last at 350whp? I thought @CSGmike said that its life was measured in hours?! Maybe the cost of adding pistons and rods and labor was close to the cost of a replacement K24A2 and its not worth it
FrickingReallySlow is offline   Reply With Quote
 
Reply

Tags
worst.build.ever.

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Irace86.2.0 Build Irace86.2.0 Member's Car Journals 195 03-25-2024 12:29 AM
KPower Industries K24 swap PulsarBeeerz Engine Swaps 1756 03-13-2024 01:42 PM
Turbo or swap Fastend Forced Induction 35 06-11-2020 07:12 PM
Built Turbo K24 Swap? Calmwhiteguy Engine Swaps 31 02-13-2018 05:07 PM
IRACE86's Build Irace86 Member's Car Journals 25 01-10-2017 04:35 PM


All times are GMT -4. The time now is 10:00 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.