Quote:
Originally Posted by Toby
Olddog,
Did you ever get the F.I. tweaked to your satisfaction? Kind of Interested in the old girl.
Toby
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No. I'm still debating which way to go. I like the TWEECER but the cost is fairly high compared to just letting MassFlow chip it. I'm a little reluctant to spend money in this economy.
I did play around with the fuel pressure to get it to idle better cold. Rebuilt the fuel pressure regulator, as it wasn't holding vacuum - leak. I couldn't find anything wrong with the parts I took out.
I let it idle until warmed up, and then pulled it on the ramps and changed the
oil. Then pulled the plugs before removing the headers and side pipes. The pluggs were black and sooty. I'm quite sure the EFI would do better if it was told about all the modifications made to the engine.
The biggest thing I did was the intake was sucking in
oil and got
oil up on the flow meter. The intake ports were shifted off center of the bolt holes on one side and quite smaller than the gaskets. I port matched it up to the gaskets. The heads were already perfectly matched to the gaskets. The fuel injection bungs were partially blocked by the welds. I machined them back out. I also polished the inside of the intake while it was off. Lets see the four end bolts were bottoming out before they tighten - I think that caused the leak. I tapped the heads and re-did the heli-coils. Oh yea I put a windage tray in it and welded the oil pan while I was at it. Felt like I picked up 50 hp after all of that above. However I think the oil on the flow sensor may have shifted its calibration some, even though I cleaned it.
Don't get me wrong, it runs decent as it is. I think there is still another 50 hp to be had with better tuning.
Buy the way, was the heads ported? They looked very nice and intake and exhaust match gaskets perfectly. I doubt they come out of the box that good.