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Hi guys. I just swapped my SE-R B13 with a SR20VE. The engine came directly from Japan, not sure about previous mileage and things like that. The engine came with the VE ECU and harness, furthermore the awful CVT gearbox.
We are using the DE ECU, DE MAF, DE distribuitor, and a ACT clutch kit and 9 lbs Fidanza flywheel. I have a SAFC II installed on my car too. My car has a custom made CAI, SSAC Header, and 2.5" exhaust.
The engine started with no problems, and the car felt moving good even though we hadn't the VVL working yet. Then later we test compression, and we got 210 psi in all the cylinders. We gotta consider the engine hasn't got started for about 5 months. The engine feels smooth.
For the VVL activación, we installed a MSD Window Switch PN 8969. And we think it's working fine. We set it at 4.6K and once the car hit that, the VVL started to work.
Before taking the car to the dyno, the engine had run for about 40 miles. The first run gave 153 whp and 133 lb/ft. The A/F ratio was kinda rich, almost in 12 from the VVL activation till 7500 rpm. It was supposed we tune the SAFC, but honestly, I didn't get to see mayor changes, don't know if it's working properly The timing was set to 25 at the dyno.
But we got a 5 whp increase once we got to activate the VVL at 4.8K rpms, but no mayor changes from SAFC tuning, and the final A/F ratio was in about 13.5.
My finals numbers were 158 whp y 137 lb/ft
Honestly, I don't know what could be wrong, even though I know I have to clean inyectors, changing oil to Mobil 1, but I'm pretty sure we cannot expect major changes with them.
Finally, we test the car at the drag strip. I had some serious problems with launching, I tried to launch at 4000-4500, but once the VVL was activated, my revs moved to redline and my first gear was a complete waste of time, my best time was 15.1, but honestly I sucked launching my car, but I guess my tires didn't help me a lot, as I was using 185/60R14 tires with an awful 460 treadwear Once we tried some semislicks, and a friend of mine got my car and it hit 14.6 s at 96 mph and I can't remember the 60 feet time.
So if you guys have any suggestions about what should I check, change, etc.
Thanks
Some pics:
Sorry but my engine ain't very clean yet
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1992 Nissan Sentra SE-R SR20VE Swap ---> Sold
How are you compensating for the 333cc injectors when the DE ECU expects 259cc?
C
I'm using a SAFC II, but honestly, as you can see the dyno pic, the final A/F ratio is in about 13.5, and in the first run it was in about 12 but no changes in the whp curve were seen once the SAFC was tuned.
Before installing the MSD 8969, we checked both solenoids were working, and once the VVL is activated, the car is really loud. I really think both of them are working.
Before installing the MSD 8969, we checked both solenoids were working, and once the VVL is activated, the car is really loud. I really think both of them are working.
usually, you can only hear the exhaust cam activate because it is noticeably louder than the intake cam. If i were you, id double check to make sure they are working because your dyno numbers are what a stock ve would put out.
__________________
Uzi on the nightstand, I'm the man you go to war with
Not a man you go to war against, patience, I'll get you
If that means I can't sleep a WHOLE YEAR, I'ma get you
Gino, you tried to be the king but the ace is back
usually, you can only hear the exhaust cam activate because it is noticeably louder than the intake cam. If i were you, id double check to make sure they are working because your dyno numbers are what a stock ve would put out.
How should I do it? I'm just using one MSD. Should I unplug each solenoid and test it?
I'm using a SAFC II, but honestly, as you can see the dyno pic, the final A/F ratio is in about 13.5, and in the first run it was in about 12 but no changes in the whp curve were seen once the SAFC was tuned.
test the solenoids by testing one at a time...set the activation point low and this will cause the car to idle like sh*t, thats how you can tell theyre coming on.
test the solenoids by testing one at a time...set the activation point low and this will cause the car to idle like sh*t, thats how you can tell theyre coming on.
Thanks, I will try it.
I have another question, the first run, with no SAFC tune gave 153 whp, and the 5 whp increased was obtained by modifying the VVL activation point from 4.6K to 4.8K. So I'm just amazed that changing AFR didn't made any major changes in whp curve Initial AFR was in about 12 and the final AFR was in 13.5
I have another question, the first run, with no SAFC tune gave 153 whp, and the 5 whp increased was obtained by modifying the VVL activation point from 4.6K to 4.8K. So I'm just amazed that changing AFR didn't made any major changes in whp curve Initial AFR was in about 12 and the final AFR was in 13.5
theres a certain method for figuring out the best activtion points for the vvl activation.. Also, 25* of timing seems excessive, even with the DE ecu. Not to mention your AFR doesnt look very steady.
theres a certain method for figuring out the best activtion points for the vvl activation.. Also, 25* of timing seems excessive, even with the DE ecu. Not to mention your AFR doesnt look very steady.
The timing was set to 25* and the car gave 153 whp, we put it on 21* and the car went downhill to 144 whp So we changed it back to 25*.
I had read somewhere, when you're tuning the AFR, the VE likes the lean side, about 14, but as the engine is just starting to road, we didn't try to adjust it that way.
I know the VVL activation method, but when you're using them independently, but not sure when they are activated simultaneously.
how come there isnt anything connected to the soleniods?
__________________ KL0 P11 Sport
VE, JWT Pop Charger, Carbing: Tri-FSTB RSTB LCA Bar, SS Autochrome Header, Greddy Evo, Rear sway bar
------------ Surround Sound My VE thread
Honestly I just can't comprehend how the SAFC tuning didn't help at all. As I stated before, the first run gave 153 whp with a AFR in 12, then later with a AFR in 13.5, I got the same whp. We got a 5 whp increase by changing VVL activation point
After looking closely at your pics, it seems that the MAF is VERY restrictive.
I understand that you're using a DE ECU et all, but with the piggy back system a possible solution would be to try changing the MAF to a P11 / VE / DET / Maxima?
Allow MORE air through; increased air = more tuning capabiltiy.
After looking closely at your pics, it seems that the MAF is VERY restrictive.
I understand that you're using a DE ECU et all, but with the piggy back system a possible solution would be to try changing the MAF to a P11 / VE / DET / Maxima?
Allow MORE air through; increased air = more tuning capabiltiy.
Best of luck with what ever you do.
Well that was something I was going to do, but I hadn't time. I have the VE MAF, but I don't know how does it change the SAFC II setting As the SAFC usually ask for some values when initializing it.
Maybe the SAFC is hooked up wrong? I honestly don't know why you didn't gain anything though.
P.S. - Clean your motor. Everybody is thinking it, no one is saying it.
I don't know, but the SAFC did change the AFR as I said before, so I guess it's working, but no getting some whp Kind of weird
About the dirty engine, well I can't clean anything of those marks as they mean the 30 days warranty for the engine, so I'm gonna wait, in about a month, I might clean my engine
The timing was set to 25 at the dyno.
Once we tried some semislicks, and a friend of mine got my car and it hit 14.6 s at 96 mph and I can't remember the 60 feet time.
