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Quote: Originally Posted by BLUE TII
Don't do it...
That car is already making over 300rwhp and changing out ECU and fuel system for E85 isn't going to help reliability.
Now, I can see eliminating the safety net of stock ECU if you are intent on 350rwhp +.
i Already put the Haltech in. These cars make 220whp on my Dyno in stock form. It’s at 300whp now with the mods. The stock ecu is dangerous with the full bolt ons. Now it is nice and safe.
I see now you are a Tuna. No chance the car was going to stay on stock ECU
Make us a map from your car you can sell that has knock control worked out and full safety/driveability features!
Not only have I added the safety features into my mapping, but also staged pre-control boost for the primary/secondary transition that is gear/load dependent.. This allows me to dial in the transition point much more accurately for predictable power delivery!
I found your youtube videos today, they are great.
Have you decided what to do for the secondary fuel rail? If the Radium Engineering or Full Function fuel rails had been available in 2008, I might have gone with one of those. Xcessive Manufacturing only advertises the 4-injector rail to match their LIM, but it might be worth a call.
If you haven't already experimented with the sequential turbo transition RPM, I think it feels better to bring the second turbo in at a slightly lower RPM than the stock ECU did. The tires don't care what the boost gauge says, they care how much torque the engine is making.
I found your youtube videos today, they are great.
Have you decided what to do for the secondary fuel rail? If the Radium Engineering or Full Function fuel rails had been available in 2008, I might have gone with one of those. Xcessive Manufacturing only advertises the 4-injector rail to match their LIM, but it might be worth a call.
If you haven't already experimented with the sequential turbo transition RPM, I think it feels better to bring the second turbo in at a slightly lower RPM than the stock ECU did. The tires don't care what the boost gauge says, they care how much torque the engine is making.
I have been patiently waiting for a rail from Chris Ott at rotary performance....he has been working on a new rail for months....i am not opposed to working with someone else but i am not getting much response from anyone. so i continue to wait.
as for the sequential transition, I did one better. I have developed a new table that allows me to change the transition point AND duty cycle depending on rpm/gear/and load. I have a very nice transition now that is almost seamless with a very solid 12psi punch on the primary. I LOVE THE HALTECH! I have also created tables for load dependent fueling based on the fan/ac coming on. it allowed me to dial in the fueling even further for normal driving.
as for the sequential transition, I did one better. I have developed a new table that allows me to change the transition point AND duty cycle depending on rpm/gear/and load.
How do you compensate for the change in engine VE/fueling requirements from the differing levels of exhaust restriction primary turbo only vs both turbos?
Do you have two complete maps (primary only, and both turbos) that it switches to based on sequential operation?
Or do you just have it tuned conservatively enough that it doesn't matter when it leans out from increased engine VE when operating on both turbos?
How do you compensate for the change in engine VE/fueling requirements from the differing levels of exhaust restriction primary turbo only vs both turbos?
Do you have two complete maps (primary only, and both turbos) that it switches to based on sequential operation?
Or do you just have it tuned conservatively enough that it doesn't matter when it leans out from increased engine VE when operating on both turbos?
The primary is producing enough flow to align the VE in the lower rpm area that it operates. As the secondary comes on, the transition is slow enough to create a VE lag that is totally within the safety net of fueling already applied. There is no need to compensate. The primary turbo never operates at higher rpm where the secondaries are always awaiting unless throttle position is very low. And it’s a very limited crossover area as well.
No sir, a good few of these have passed my hands over the years, the changes came in July and this car had the 16's for sure, they're pretty rare the early ones .
If you wanted any more specific info on your model, pm me the VIN.
im sorry to say but you are incorrect. This car is October of 1993. The brakes weren’t upsized until version 3 RZ in 1995. This car has the 17 inch bbs and bilstien shocks as originally equipped. I added the strut bar as the original was not on the car when i purchased it.
This is looking awesome man. Have you spoke with RP about the rail yet?
I am ordering that rear spoiler today from Shine. Just no idea if I want to go plain or twill on the carbon fiber.
The primary is producing enough flow to align the VE in the lower rpm area that it operates. As the secondary comes on, the transition is slow enough to create a VE lag that is totally within the safety net of fueling already applied. There is no need to compensate. The primary turbo never operates at higher rpm where the secondaries are always awaiting unless throttle position is very low. And it’s a very limited crossover area as well.
Sounds cool.
Hope you get some footage of this sequential tuning strategy at work.
Something as simple as a video of various types of driving with a boost gauge in view could motivate people to follow your lead/come to you for FD tuning.
i got around to doing my rats nest/solenoids/secondary fuel rail/2200cc
injectors. Everything went well and I’m happy to have reliable sequential action and plenty of fuel to feed the motor at 300whp! Not sure if i want to get it on e85 but I’ll likely add the flex sensor for the hell of it.
The last time i did a rats nest was over 15 years ago. It still sucks. Haha. But i REALLY wanted that sequential turbo setup to live on. I also blocked off the ACV and removed the associated lines for it. So far so good!!
I'm pretty sure once you've successfully done the rat's nest more than once, you're technically a legally accredited surgeon and you could just sign in at the nearest hospital.
12-16-18, 08:15 PM
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