3D914s 914-6 SHO 3.2L v6, Build Thread - Project for sale. See classifieds Options

[3d914]

Got the motor back on the stand. Valve covers are on, oils in it, just need a few more hours to finish up the accessories, coolant plumbing, and connect up the wiring. Should be ready for a mid-week startup.

[3d914]

Good news! Its back together, full of fluids, and ready for round two of bench tests.

Just got the oil pressure test done, and the light went out in about 20 seconds.

Here's the video.

Should be ready to run this weekend.

[AZ914]

Good Luck!!!

[3d914]

Thanks, Jason.

Spent yesterday doing a basic breakin of the motor. It will still be many hours before these chrome rings seat fully, so I'll just keep running it off & on while finishing the bodywork on the 914.

Here's a video of the latest run. Sound pretty good, but still getting some mild surging. Cold start seems to have more, but I'll sort that out as I go along.

[Cairo94507]

Nice- Looking forward to seeing that in the car.

[3d914]

Thanks, Cairo. Been working on some motor issues - mild surging has turned into stumbling. Will post some more when I have something solid.

I did decide to get back to the bodywork even though the engine isn't in peak condition. I'll just have to balance both.

[3d914]

Been dealing with stumbling idle and mid-rpm surging. Decided to pull the intake to check injectors, injector wiring, timing sensors, etc.

All the timing sensors checked out and injector wiring is correct. Got the O2 sensors cleaned along with the IAC (air by-pass). IAC was filthy - so it was likely contributing to cold start stumbling. I also checked all the injectors and all had good healthy spray of fuel. All held full pressure individually - so no leaking concerns. I did notice some cracking in all injector's black cushion rings so a new set is on order.

Should be ready for another test run next weekend.
Will report back then.

[3d914]

Well injectors seals are back on, fuel rails in, manifolds on, fuels lines are all hooked up and I'm ready to test this motor again.

But wait - daughters HS graduation is this evening so rest of the afternoon will be spent elsewhere. But I'll be back bright and early tomorrow to see how this runs.

[Cairo94507]

Congratulations and good luck (IMG:style_emoticons/default/beer.gif)

[3d914]

After long last - Yee Ha - I've got a good running SHO! (IMG:style_emoticons/default/piratenanner.gif)

Spent the weekend working out the final bugs, here's what it took:

• Added shielding for DIS cable extensions
• Fixed cracked and separated shielding in stock engine harness
• Fixed an intermittent main ground. Pin in plug was not seating completely. Sometimes had continuity, sometimes not.
• Similar pin problem with Coolant temp sensor. Replaced it with a spare I had.

Rechecked O2 output and its now steady and w/in spec. Fuel pressure is holding properly. I need to recheck the IAC valve on a cold-start because the last values I got over the weekend didn't look good.

But it's sounding really good. The little bit of hunting at idle I think has to do with run time. I just need to get more time for the PCM to register settings.

Here's an updated video.

(IMG:style_emoticons/default/piratenanner.gif)

[Chris H.]

Sounds really smooth! Nice work!

[Mike Bellis]

Get it on the road! Time to drive!!! (IMG:style_emoticons/default/driving.gif)

[Cairo94507]

Gerard- Sounds good. Really looking forward to seeing it in the car. Love those Yamaha engines - they rev so nice.

[3d914]

Thanks guys.

Next up is a rolling stand for the car so that I can do test fitting of the motor. I'm sure it will require multiple attempts so the body will sit at a fixed height. I'll use my ATV lift under the engine cradle to lift it to the needed height.

Pics to follow.

[3d914]

Well got the steel for the car dolly Saturday so I hope to start on that during the week. Had a good run of the SHO motor today. With a single fan/shroud I borrowed from a buddy I was able to run it longer. Did a 30 minute run today. I varied the rpm range every little bit and only let idle twice. Will do a 60 min run sometime this next week.

[3d914]

OK another good test run, this time an hour long. Still getting codes on the IAC valve - which makes sense because the values were off when I tested it at cold start. Time to order a new one.

Other than that the run went well.

[3d914]

OK, well rainy season hit before I got the gutters on the house finished so I've been dodging the rain. Got them finished up Friday though with the long weekend.

Spent today building a fixture for the car dolly weldments from some scrap wood. The weldments are made from 3-inch and 6-inch 1-1/2 inch sq tubing - all at right angles. So hopefully I can do a decent job of getting them to come out right. There are ten separate weldments.

Should be able to get some time during the week to begin welding, so I'll post some pictures as I do.

[3d914]

Here's the first of the three weldments. This is a three-way bracket for the lower four corners of the dolly. They're rotated at each corner so that each side gets one pass-thru and one butt joint. This allows me to adjust the fit. The lower cross pieces will be approx 54" in length, bolted at the butt joint and match-drilled and bolted to fit at the pass-thru end.

[3d914]

Got the 3-ways mounted to the casters and cut the cross pieces that will be match-drilled. Next are the vertical pieces.

[bulitt]

You must be German, the time and effort spent on engine test stand, dolly, WOW.
I had three inch casters on my dolly. The tube without engine or suspension was difficult to move and kept popping ball bearings out. Just went to the 5" rubber casters from HD. The car rolls so easy its scary. Cant tell what your are using but you may want to consider putting big ones on before you get it all finished and the car loaded.