My engine is currently being rebuilt by the same engine builder who did the last rebuild on it. Part of that was to dismantle and clean the head then rebuild with new followers and correct geometry. That they did but.......when I looked at it today I immediately saw that all of the inlet port filler was missing!!!!! They did not even know it was not there.
It appears that they are admitting the error (understatement!!) and have said they will get some filler back in there. My issue is that they are not necessarily experienced with this type of engine and therefore probably do not specifically know the shapes to aim for. They did a port mould for me before rebuilding but unfortunately this was taken AFTER the filler was lost and so is therefore no good as a reference. Their suggestion was to take my port matched inlet manifold and fill based on that. My belief would be that this might not end up with the best shape and best flow. They will know how much filler is at the port entry and they can probably see roughly where it adhered to the port sides due to the keying marks the original builder made but they will have nothing to assist with blending into the short side turn or the shape once inside the port. Thoughts? Should I just let them do it and hope (could the slight variances actually make much difference on HP? - assume it will).
I did ask them to do a flow test during the rebuild just so I had some reference numbers. If they did that (and I got the impression they hadn't grrrr) then that becomes a good reference of their re-filler work. If they didn't do the flow test then the ONLY references I have is some photos looking into the ports and teh output from a previous chassis dyno run. I could possibly take the car back to the same dyno and ensure it hasn't lost HP. Sounds very vague to me? Thoughts?
So cheesed off right now!!!!!
I am not sure that there are any experts in South Australia (Adelaide) who intimately know the Pinto head who could be sub-contracted to re-fill it.
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