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Alrighty, here's the dilio... I'm going to do a leak down test next week to see what the general condition of the engine is in. If everything is tight, that narrows it down to the valve guides, which I already am 100% positive the main thing is anyway. The engine itself(rings) though, I am not very confident in. I don't think this engine has the compression in it that it had when I did my last dyno run, but who knows, we'll find out next week. In any case, this head will come off and I might put new seals in it to mask the worn out guides, or if the head has some noticeably recessed valve seats, I'll take a look see at the "refurbished" F head that I have and toss it on the car if it's in nicer shape all around(which it better be, because I want it to be).
Then, it's on to the porting of my Alloy SU manifold. I just found some rough sandpaper in my bedroom, so I'm going to use that on the manifold sometime soon, just smooth things out in there a bit. If I end up going with the F head, I'll do some more work on the ports that go into the head to open them up and get rid of the ridge for the centering rings that are used on the B head. I'll have to go back into the manifold as far as I can to not make the inherent "bubble" in flow be too bad.
No cam for now... No money for that, and if I did it(and even if I do the F head), I will be changing too many things from my last dyno run. And with now knowing where my timing is set at, last time I ran on the dyno, it wasn't as retarded as I thought it was. Well, actually, it was, nvm. How much power do you think I lost from being 10 degrees retarded from what would be making peak power? We shall find out what the correct timing, the correct mixture, a pertronix Ignitor, a better flowing intake(read:nothing, well, for my max hp runs anyway, I'll try out my CAI and Stock filter/no top setups also), an electric fan instead of the DIRECT DRIVE cooling fan, and a smoother flowing manifold will do. Then playing with different settings for the fuel mixture on the carbs and different maximum timing advance settings for best power. I think it should be good enough for 15.5more hp at the wheels don't you? Well, I hope so anyway. Now if only the rings and bores are still good and not too worn out compared to last time... And then what if I put the F head on it... Hmmm, fun stuff. Next month will tell! w000!
Peak power then was 84.5hp at 5200rpm(with each run going up in power, engine was getting cooler...) and 103.5lb/ft at 3200rpm. I'll start my pulls at a lower rpm too... Last time I went I was hitting my trq peak right as the engine started getting in it's groove, so the peak might actually be below that. I'll start my pulls at 1500rpm and slowly get to full throttle by about 2000rpm so it doesn't bog at all.
And I was looking for some of my old timeslips(different engine) just for fun, but I can't find them. Dangit!
Thank you to all who I have emailed and gotten responses from!
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Kyle - '68 142? - Oregon Volvo Tuners?
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