Learned some useful ECU stuff and some VE rumors

Ben · 02-21-2002, 02:34 PM

I have learned a lot about VEs and DETs last night. A friend of Fast91SER's used a DE ECU in his DET for well over a year with no problems. He then got a DET ECU and all it did really was not make him run not as rich. He still ran kinda rich in his opinion. The deal is there are auto and manual DET ECUs, and you gotta match it up with the right kind of TPS because there are manual and auto TPSs as well. So for the cheap turbo setup, get a DET or DET turbo parts, including 370cc injectors, run a little richer, and be fast.

The same idea applies to VEs. Just swap in the VE, keep your DE ECU, and get a MSD window switch. You would want to swap in the stock 259cc injectors from your DE into your VE and it will run much better since the DE ECU is made for 259cc injectors and not the bigger VE ones.

chriscar · 02-21-2002, 03:05 PM

Just some clarification on the TPS. Are you saying to use the DET TPS or the DE TPS? What about the MAF? How about running the DET with the DET ECU, do DET's usually come with ECU's?

Chris

Ben · 02-21-2002, 03:13 PM

I *think* the TPSs between the DETs and DEs, and probably the VEs, are the same. AFAIK as long as you have a manual SR20 TPS and a manual SR20 ECU, you will be fine. Depending in injector discrepancy you may run leaner/richer, so I would think if you were going to err in your injector/ECU combo I would get a smaller injector ECU that the injectors you have in the car.

DETs can come with ECUs. I've heard it both ways. I don't believe DET ECUs are any harder to come by than the motors themselves. However manual DET ECUs may be harder to come by.

Yellow4g63 · 02-21-2002, 05:04 PM

OR u use the VE injectors and MAff and use a AFC or Emanage to control it. I looked on greddy japan and the emanage will work with the VE.

.02

Ben · 02-21-2002, 05:06 PM

No you can't! Black boxes are evil! You will blow your engine up!!! Don't do it!!! :p

CNibbana · 02-21-2002, 09:28 PM

Quote:

Originally posted by Ben98SentraSE
The same idea applies to VEs. Just swap in the VE, keep your DE ECU, and get a MSD window switch. You would want to swap in the stock 259cc injectors from your DE into your VE and it will run much better since the DE ECU is made for 259cc injectors and not the bigger VE ones.

Why not just run your DE ECU with the VE injectors and MAF and have JWT program your DE ECU accordingly?

I thought you were gonna say use your VE ECU. Which brings me to the question, I wonder why you can't use the VE ECU?

Ben · 02-21-2002, 09:33 PM

People kept saying "Well the wiring harness and pinouts probably aren't the same" and I kept saying "Why wouldn't they be?" So now the guy on www.megapimp.com has done it so it's proven- the pinout is the same and you can use your DE ECU.

No, I don't see why you can't use the VE ECU. Wonder how much they are. I will find out.

CNibbana · 02-21-2002, 09:56 PM

I have a VE ECU. Came with my motor. I never even considered plugging it in.

Calum · 02-21-2002, 11:00 PM

Quote:

Originally posted by CNibbana
I have a VE ECU. Came with my motor. I never even considered plugging it in.

Can you double check this? See if it plugs in.

b-b00gie · 02-22-2002, 12:19 AM

Quote:

Originally posted by CNibbana
I have a VE ECU. Came with my motor. I never even considered plugging it in.

Ack! The SR20VE ECU's arent available for manual trannies! They only came with CVT and CVT-M6 trannies which are both those shift-o-matic auto trannies...

You'd be better off with your DE ECU, not to mention I dont think JWT can reprogram the VE ECU's?

Ben · 02-22-2002, 08:04 AM

I guess it wouldn't hurt to plug it in and see what happens. You do know the VE uses a Frontier MAF, so there's that difference. But hey, if may work well enough just like the DE ECU worked on that guys DET for over a year. I would try it.

Yellow4g63 · 02-22-2002, 08:15 AM

Ok we know the SR20VE dose not come in a 5spd. But the SR16VE dose. So maybe u could use your sr20VE harness and SR16VE! but then cost might be the problem. Whats JWT charge to put the VE program on the DE ECU?

Ben · 02-22-2002, 08:25 AM

It's not even worth the cost of any of this stuff really since we know you can you use your DE ECU with the VE and just swap out for your 259cc injectors and it will run great, with a mechanism to swap the cam profiles at 4k RPM.

And you don't have to worry about the wiring harness- they are the same as the DE, minus the two cam profile switching solenoids.

CNibbana · 02-22-2002, 08:27 AM

JWT charges $595 for the VE program. An additional $270 if you want the daughterboard to control the VVL solenoids.

Cost isn't really an issue, my concern is more associated with getting the best program. Clark told me there isn't an additional fuel map needed for the VVL because of the MAF. This is why they can program my DE ECU for the VE injectors and MAF and I'm good to go.

Yellow4g63 · 02-22-2002, 08:59 AM

whats the rev limit goin to be set at? and how can they make a VE program if they can't crack the code on that ecu? are they just takin a stab in the dark?

SucKit · 02-22-2002, 11:13 AM

The vvl is like vtec right? Well a vtec engine into a non vtec car is missing 3 wires, this is in a honda of course. Those 3 wires are Vtec oil pressure and the solenoid which has 2 wires. Once those are setup the car will kick in vtec. Those that chose to get a ecu will have it activated by the ecu or by an Afc w/o going through the ecu which is pretty much the same as JWT ecu since it kicks it in both at the same time.
The stock ecu runs the VE cause its the same wiring diagram. I have the S-afc manual for wiring up cars and it states that the P11 uses a N3-a plug which we use to and even the s14 and s15 so there would be the comp for a turbo vvl fwd.

Andreas Miko · 02-23-2002, 07:45 AM

Stock DE injs are good for 200 hp and VE inj are good for about 235 hpso if you listen to Ben about using DE inj with DE comp lets so how long it takes to fu*k up the $2500 investment. Its always better to run rich than lean. Too rick you loose HP and a little fuel, too lean you loose motor. The motor with Bens setup is 10 hp away from starting to run lean. 11-1 compression motors do not like to run lean. If you run the motor with the stock VE inj and a DE comp you will be better off because you can use the extra fuel that is coming out to control the detonation because the extra fuel will keep the temp dowm in the combustion chamber.

As far as VE harnesses go the SR16VE harness from a N15 is just about a direct plug in to a B14, and a N16 harness is just about a direct plug in to a B15. When I say it is close the only little changes to the wires are under the dash.

When using a SR16VE harness and comp, you still are up against the 8200 RPM rev limiter and the 109 MPH speed limiter. I do know people in Japan that can program the VE computers.

Ben · 02-23-2002, 08:35 AM

All I know is the guy at this site www.megapimp.com did it, it works, run great, and has claimed a 12.92 in the quarter mile with this setup and slicks. His girlfriend drives the car everyday as he's told me. I haven't tested any of this.

Everyone on the list forever and ever said you couldn't use a DET ECU on a US car even with a DET, but I found out you could as long as you have a manual DET ECU. I first learned this was possible by seeing a car that had had one for a year or so installed at the convention last year. I was like, ok, I'm a believer now. Granted I haven't seen this VE with 259cc injectors, but I have been told about it and have seen somewhat detailed pics of the car so I tend to believe again that it does work. It may be close to running out of injector and going lean, but it runs and apparently runs well.

Andreas Miko · 02-23-2002, 09:02 AM

I have put many a JDM DET ECU on a cars here in the US why do you think I sell them on the net. As far as Auto or manual working they both work. A det ECU is just as good as a JWT ECU but all you need to do is get rid of the speed limiter which is just a wire gut away.