Dyno 440whp 440 torque

 

^^^^In case you have trouble reading the results:

 

Nice catch! Couldn’t make it out on my phone. Need to message him on YT and see if this was one of the first pulls or if it was the one when he did 440whp and 440 torque as listed on his video.

 

This makes me question if using the ISF Ecu is such a detriment. Those are pretty solid numbers. I wonder how his A/F ratio and timing is, looking for any indication the Ecu is holding it back.

 

Is he FBO as well? Or just RCF motor and intake?

V.

 

He used to be boosted, so probably at least header and exhaust. Sounds like maybe oem ISF tune.

 

Gutted stock headers, intake, exhaust, E65

 

Hello everyone, this is my car. My buddy Adam told me about this post so i'm here to answer a few questions and speculations. Yes i was boosted previously, the car made around 542whp on 5psi on an engine that had 260k miles. With this many miles i knew it was gonna eventually go out so i bought a spare motor and had it sitting when the car was at 255k. I used my high mileage engine to test and tune and do runs in mexico, trying to force it to blow up so i could install my new engine. These engines are so well built that even with that high mileage it wouldnt blow no matter how i abused it. So my new motor sat for about 3 months and exhausted the warranty. My motor finally blew the suspected headgasket as it started smoking alot at 260k miles. So i installed my new engine that i had sitting but that new engine turned out to be a bad engine. I resold that new bad engine and my turbo kit after my loss and purchased the RCF engine with the money as i stumbled on a great deal in ATL.

Now with this new swap, everything was plug and play. I used the RCF engine harness as well and it plugged right into the ISF ecu. I also have the RCF ecu but i didn't want to use that because the new can-bus system would have been problematic for the older ISF. So i compared both ecu pinouts that i received from my buddy Jake and switch the pins from the RCF engine harness to where they are on the ISF engine harness. I also had to repin a few junction connectors that also plugged up. My only challenge was the starter signal since that came from the immobilizer and not the ECU. With the atkinson and otto cycle, that doesn't affect anything since it's mechanical and VVT driven. How the cyle works is the RCF uses Atkinson cycle for fuel efficiency at lower rpm and switches to Otto cycle for power output at WOT. since i'm using the ISF ECU the engine will always be in an Otto cycle like the ISF which i believe is better for low end torque. Otto means it's always ready to make power, who needs atkinson for fuel efficiency in a sports car, right? But everything works great and completely like stock, with no check engine light.

Let me know if you have any questions.

Mike.

 

Just want to say thank you for posting. We have been wanting to see something like this happen. I’ve been wanting to do this swap myself. Seems pretty straightforward and simple but the way you make it sound. Are you using the stock oem ISF fuel pump? I’ve heard the rcf/gsf have higher fuel pressures which I feel can be made up for by a drop in AEM or Deatchwerks fuel pump. Any plans on doing headers?

 

I’m wildly glad you joined to educate us. Welcome.

To clarify, you used the RCF engine harness and even the connector from that harness, you just had to move some pins? Would you be open to sharing how to alleviate all the wiring challenges. We have a couple members who have considered this swap, but we’re hesitant.

Also, are those the oem RCF headers, oem ISF air box, and what are you tuning with?

 

Any time buddy, alot of people said it wasn't possible but it was all speculations. These were all people who've never tried it and was only using theory to conclude. I do my own research for these reasons.
It is straight forward, just tedious. Regarding the low side fuel pressure, i made a custom hanger by combining the ISF Hanger and the RCF hanger so i can use the stock RCF pump or a Hellcat pump if i wanted. Then i deleted the intank FPR and added an external FPR so i can control fuel pressure with a gauge from inside the engine bay. The RCF Fuel system doesn't have a return so i used the existing ISF return line for my external FPR. so now i have plently low side fuel pressure at my finger tips, it's also vacuum adjusted. The bigger HPFPs are cam driven so that doesn't affect anything, the cam speeds determine the pressure all the ecu does is provide power and ground to those pumps, the higher pressure from those HPFP is actually a good thing. The bigger Port injectors is also a good thing, that's like a simple injector upgrade so there's more fuel to play with. But most importantly since you'll now have alot more fuel than the ISF has you will need a tune to make this swap possible, similarly to when you install bigger injectors on any car. So if you're doing the swap you will need someone who can adjust the fuel or your car will run pig rich. I tune my car myself so this is why it was easy for me.

 

Yes, the RCF engine harness connector will plug into the ISF ecu. The engine has all the same sensors so all you have to do is find out where the input and output for those sensors go and put them where they were on the ISF so the ISF ecu can have the necessary information to send required signals. All toyota did was switch the pins around but everything on the engine are the same including the ecu connectors.

I am currently using the RCF OEM headers, i don't mind for now as articles says its more durable than the ISF stock headers. I will eventually get aftermaket headers, but for now i simply deleted the cats. I am using a BitEdit / BitBox software to flash tune the stock ISF ecu. I am an original haltech guy but i am now experimenting with ECU flash tunes. So i have the basic knowledge and experience to tune the car myself.

 

Amazing! Can’t thank you enough for all this knowledge. I’ve been dying to do this swap on my ISF. I could only imagine how much you have to gain when you put some headers on.

 

Do it and make a DIY!

 

I would love to! I would definitely need help with the electrical part though.