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I think you could make 700wrhp on just pump 93, I have heard of folks making more, but would depend on a lot of stuff, engine compression, intercooling, weight of the car
There is plenty of "safety issues' with a factory ECU as it can't maintain a commanded A/F ratio when something goes wrong... and your engine will go boom as you know. Can't you just pay someone to make it pass?
Aftermarket ECU's will add more fueling to maintain proper A/F and if it sees dangerous readings it will make the engine cut out for safety. For example if one of your fuel pumps is dying, the relay is failing, low voltage to pumps, plugged filters, etc. You can also program in low oil pressure safety cut as well as high coolant temps, record crankcase or coolant pressures, Boost by gear/time all incorporated into 1 ECU is also nice plus data logging, multiple fuel maps/tunes etc.
I wouldn't push it very hard on 93 octane... but if you can measure ethanol content a blend of 93 and e85 to around e40/50 will do wonders for safety and overall power potential.
Is it a actual emissions test up the tail pipe or just a readiness test? Either way, should still be able to do both. The fuel will be the limiting factor here at this point. Do flex, stick a sensor in it. Even a factory ecm can do that.
I think you could make 700wrhp on just pump 93, I have heard of folks making more, but would depend on a lot of stuff, engine compression, intercooling, weight of the car
thanks John. Air to air. ~10:1. Was hoping for a little more hp, 700 is only 150whp more than the NA 416 that was in it. Car weighs about 3600. Any thoughts on boost control? I’m between the usual suspects, aes/holly and eboost2.
There is plenty of "safety issues' with a factory ECU as it can't maintain a commanded A/F ratio when something goes wrong... and your engine will go boom as you know. Can't you just pay someone to make it pass?
Aftermarket ECU's will add more fueling to maintain proper A/F and if it sees dangerous readings it will make the engine cut out for safety. For example if one of your fuel pumps is dying, the relay is failing, low voltage to pumps, plugged filters, etc. You can also program in low oil pressure safety cut as well as high coolant temps, record crankcase or coolant pressures, Boost by gear/time all incorporated into 1 ECU is also nice plus data logging, multiple fuel maps/tunes etc.
I wouldn't push it very hard on 93 octane... but if you can measure ethanol content a blend of 93 and e85 to around e40/50 will do wonders for safety and overall power potential.
thanks. Wish i knew someone. Jolt’s harness does everything except the obd port which I need for emissions. Race car exception isn’t good for me because I cruise around a lot in the neighborhood and the car is very noticeable. I so VERY wish I could do an aftermarket ECU now for all the reasons you pointed out. I’m told my ECU can’t read an ethanol sniffer so I’m sol. Open to suggestions.
Is it a actual emissions test up the tail pipe or just a readiness test? Either way, should still be able to do both. The fuel will be the limiting factor here at this point. Do flex, stick a sensor in it. Even a factory ecm can do that.
rediness test. I really want to use e85 but you never know the quality here with the Midwest gas stations. I’ve been told by several the 01 WS6 edu can’t read a flex sensor.
there are ways to piggyback the stock ECU so you can still pass emissions. I have it setup like that on my 08 corvette. I run a Holley to control the engine but still have the stock ECU and the obd system still works.
curious how limited the stock ECU is for safe 70% street / 30% RC tune and how much approx HP it will make with this setup?
A 427ci with twin 6766s on 93 octane should make around 850-900 rwhp or so through a manual (didn't see a trans listed) and be perfectly fine with the stock computer. Since pump gas is your limitation I would just gate it appropriately. If you wanted to have the ability to turn it up even more with good fuel in the tank I like the EBoost2 for something like that. The stock computer won't give you some of the safeties and built in things like boost control, etc but it's perfectly capable of running that setup without issue. You can also put in an OEM P59 computer (03-06) and run 3 bar with flex fuel capabilities or use your stock computer to run up to a 2 bar sensor with flex, I did that to my 2000 Camaro back in the day and it worked perfectly.
there are ways to piggyback the stock ECU so you can still pass emissions. I have it setup like that on my 08 corvette. I run a Holley to control the engine but still have the stock ECU and the obd system still works.
thanks. I’ve read some threads and there’s a
company making harnesses but none talk about if ready monitors will work normally.
A 427ci with twin 6766s on 93 octane should make around 850-900 rwhp or so through a manual (didn't see a trans listed) and be perfectly fine with the stock computer. Since pump gas is your limitation I would just gate it appropriately. If you wanted to have the ability to turn it up even more with good fuel in the tank I like the EBoost2 for something like that. The stock computer won't give you some of the safeties and built in things like boost control, etc but it's perfectly capable of running that setup without issue. You can also put in an OEM P59 computer (03-06) and run 3 bar with flex fuel capabilities or use your stock computer to run up to a 2 bar sensor with flex, I did that to my 2000 Camaro back in the day and it worked perfectly.
I picked up a truboost2. Still contemplating how I’ll want the modes and scramble boost programmed.
I couldn’t find anything about the p59 in a 4th gen. Two tuners said my ‘01 computer can read/adjust to a e85 sensor. …so you caught my attn.; please expand.
thanks. Wish i knew someone. Jolt’s harness does everything except the obd port which I need for emissions. Race car exception isn’t good for me because I cruise around a lot in the neighborhood and the car is very noticeable. I so VERY wish I could do an aftermarket ECU now for all the reasons you pointed out. I’m told my ECU can’t read an ethanol sniffer so I’m sol. Open to suggestions.
Have you talked to him about being able to add it? He is very knowledgeable and helpful.
I couldn’t find anything about the p59 in a 4th gen. Two tuners said my ‘01 computer can read/adjust to a e85 sensor. …so you caught my attn.; please expand.
Well the stock 01 computer is only capable of doing flex with a 2 bar OS so you are limited to ~14 psi of boost. If you change it out to a blue/green P59 you get flex fuel with a 3 bar option so you can run more boost.
Have you talked to him about being able to add it? He is very knowledgeable and helpful.
I did. I told him my main purpose of wanting the harness and he said it’s not not the harness’ intention. I think more folks will be looking to his harness as our cars reach 25yo and become emissions exempt. I have 2yrs and 1mo until my last obd 2 emissions test
Well the stock 01 computer is only capable of doing flex with a 2 bar OS so you are limited to ~14 psi of boost. If you change it out to a blue/green P59 you get flex fuel with a 3 bar option so you can run more boost.
I searched the forum and web a bit and it seems like a few got it to work. But a lot seems to be involved and WAY over my head. I’ll likely just use the current setup until my car is emissions except.
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