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Hey guys, just stopping in for a few updates. Spent quite a bit of time last night and this morning disassmbling, cleaning and lapping valves. Ended up not using any of the stock valves.
For quality control purposes, I'm doing a combination of light checks and liquid leak checks using rubbing alcohol. Which is probably hard to see from the photo.
Good news is the rear head finally passed. I was then able to get it fully assembled.
Pistons have also been cleaned up.
Cleaning and lapping valves for front cyl head is in progress:
Lastly, on a side note, when disassmbling the ported front head, noticed the cam sensors had some scrapes...
Before anyone asks the car was using AT sensors, AT heads and AT backing plate. So, I don't think it has anything to do with an improper backing plate to head setup.
However, I did recall a while back that I was driving and heard a metallic noise from the front. It ended up being bolts on the cam backing plate coming loose, which was causing the cam to contact the plate. Oddly I don't recall seeing sensor damage at the time. In any case, luckily I have a spare cam sensor set from the j35a3.
Well, stayed up late last night getting the car back together.
In the process, did more compression checks. There is definitely a notable improvement. The rear bank still has the lowest #s: 205, 205, 215. Front bank: 240, 230, 225.
This morning the car cranked up and ran on the first try. I did observe a bit of white smoke at first. But, that likely was just coolant which leaked into the cyls when the heads were pulled. After warmup and a quick road test the smoke is gone.
I then drove the car about 25 miles to work. Acceleration is noteably improved. Crusing at around 75-80, the motor was smooth and afr seems normal.
Lastly, dyno appt is set for this Friday. I the interim, will keep monitoring log data.
Not sure. The tuner seemed to think the car was not running on all 6 cyls. He swapped in a spare coil when I was there and also checked compression. Didn't notice a change in the sound when plugging and unplugging #6 coil. So we chalked it up to an injector...
Today, I checked the inj wiring with a noid light. Blinked as it should to indicate pulse signal. I then spent several hours testing different injectors and rotating around to different cylinders. Verified compression again, verified spark. Swapped coil packs, and installed a new spark plug. Still no noticable change to sound or rpm when plugging and unplugging cyl #6 coil pack. All the other cyls have a noticable chg when doing the same unplug/plug test.
Honestly this project is really starting to annoy me. I rebuilt the block. Then the heads had issues. Fixed heads. But, then couldn't get a tune. Now, i'm doing street tuning and it seems to be running rich... Although, that may have to do with the fact I added about half a tank of 91 octane to the e85. It's a bit difficult to explain, but there are 2 fuel maps and 2 ign maps. I had previously only been adjusting the e85 fuel and ign map. But, with now approx 45% ethanol, the ecu is blending between gas and e85 maps, based on concentration detected by a flex fuel sensor. So, long story short I'm trying to adjust 2 maps instead of one.
I'll likely try to use up the ethanol this week and only fill up with 91 to bring the concentration down. Then I can focus on just the regular fuel and ign maps.
Hey guys, been a while since the last post. Been dealing with some health issues and working a lot.
Anyways, did the first oil chg at 500 miles. Motor now has about 700 miles on it. After the failed dyno attempt I went over everything I could think of short of swapping the ecu trying to find an issue that may not have really been an issue. (ign coils, injs, fuel rails, fpr, wiring, compression, spark plugs, valve adjustment, ecu settings, timing). I even went so far as to send the injectors to FIC for inspection and flow testing. The result of which revealed only one slightly below spec. After cleaning the whole set was given a clean bill of health and reinstalled. The last thing I did was to replace the whole engine harness to include all new injector clips. That was yesterday.
With the motor now past the break in period, today I went on a test drive and did some hard pulls. I'll admit to accidently bouncing it off the 7200 rpm rev limiter more than once without trying. Haven't checked the log yet. But, it felt solid up to around 80-90mph. I let off just as it was reaching 100. Enough rambling here's a quick clip. Headphone user volume warning!
Figued would post an update for anyone who was paying attention to this thread earlier. Have been working on the prelude here and there in preparation for the v6. At the moment a j35 converted cl block is paired to 05 tl 6spd. P2R ported heads are loosely installed minus valves. Engine harness has been wired into the chassis harness (this was no simple task). Also picked up a remote battery mount kit, and some 2g cl battery cables. Wiring wise, need to swap out the injector pigtails for the newer style injs. Also need to solder in the reverse light switch pigtail, and add a relay for the rev lockout.
Fuel system wise, current plan is to keep a 2g return style setup with j32a2/j35a3 fpr, bigger injs, flex fuel compatible pump and flex fuel sensor. Fuel supply line on the engine side has been extended slightly, and the return hose is just pending a few adapters for the flex fuel sensor.
Exhaust for now is stock cls jpipe and j35a3 manifolds. The old h23 motor had a 2.5" catback, which should suffice for the time being. Although, it does need to be extended to the j pipe. Would like to get some headers eventually, but there are more important things needed like valves, clutch and flywheel.
The factory front crossmember was replaced with an innovative traction bar. This was mainly for exh clearance. But, it also is lighter and nicer looking.
An o.e. style sentra spec v radiator is on order and should hopefully fit.
Axles are the current focus.To sum up it has been difficult to find a solution that retains the abs pickups, work with the tl trans and intermediate shaft. Yet, doesn't cost a fortune. That said, a set of hybrid axles are in work.
03-24-2024, 06:17 PM
