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monster turbo3 build
Topic Started: Jun 17 2011, 05:53 AM (36,531 Views)
Scoobs
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:D

The water pump pulley was from me by the way :P
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t3ragtop
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Turbo3 and Twincam Tweaker

thanks for that, scoobs. :D

i thought you brought it but glenn handed it to me so i was confused.
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Norby
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t3ragtop
Sep 19 2011, 05:48 PM
watch video #8 and pay attention this time. :D
Ok, I give up. Can you tell me where to find the video?
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t3ragtop
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Turbo3 and Twincam Tweaker

page 12 of this epic thread. :D

http://geometroforum.com/single/?p=545786&t=4337320
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t3ragtop
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Turbo3 and Twincam Tweaker

this project has been idle for months while i've spent all my time on the red resto-rod vert.

i was outside working on my car in the driveway and i just happened to catch a glimpse of something over on my front porch. it was a compact but hefty medium sized package from canada that must have been delivered on friday. i was outside all day saturday and saw the mail carrier drop mail in my box but she didn't go up to the house and the post office doesn't deliver on sunday.

woohoo! it was a 3 tech performance head with some extra special love on the carving performed by clarkdw.
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stainless valves, nice work in the combustion chamber to de-shroud them. i don't know if the face was decked but the finish is superb and as flat as day old beer.
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the work doesn't translate very well to pics and my bad photography doesn't do it any justice. man, is this pretty! the bronze manganese valve guides look like gold down in the ports. everything is nicely smoothed and contoured.
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i remember having requested no finish so i could apply a special thermally conductive silicone ceramic coating. it's a flat black finish and pretty much looks like crap. it's rated for 1500 degrees f, though, and bonds directly to the aluminum. the ceramic has a higher conductivity than the aluminum and sheds heat better than the base metal.
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this might be mike's most aggressive cam. i'm pretty sure that this head will be the hot ticket for the correctly prepared lower end and vitara pistons. i'm even more convinced that the calculation of 80% fueling from the injectors producing 153 hp is pretty much on the mark with this specially prepared head.

you guys rock! beautiful work.
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starscream5000
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Got 70 MPG?

I was getting ready to say, "man, those cam lobes look fat..." then I read a little further down on your post. :rocker
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clarkdw


Thanks Richard. I think the head should get the job done for you. I had it decked just enough to make sure it was flat. With the turbo making boost and a projected 8:1 CR I thought a minimum loss or chamber volume was in order.

Can't wait to see this come to fruition. :thumb
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t3ragtop
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Turbo3 and Twincam Tweaker

the head is out of the curing oven, cooled down enough to handle, and bolted onto the block after one last cleaning of the bores to get rid of any accumulated dust and oiled with some fancy mil spec oil from glenn.
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man, those exhaust ports are the absolute whip!

i cranked the head studs down on the dvorak head gasket to 59.4 ft. lbs. (+10%) and there's a lot less drama with the studs. no chattering or other nerve wracking noises and i never got the feeling that something bad was going to happen.

the check valve for the head that i have was in no way going to fit so this install didn't use one.

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hot rod black, baby! i've never used this particular silicone ceramic high temp coating before but if it works as advertised the head should look just like these pics for many years. the stainless steel hardware looks super in contrast with the black.
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starscream5000
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Got 70 MPG?

:drool
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georandy
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starscream5000
Sep 9 2012, 05:22 PM
I was getting ready to say, "man, those cam lobes look fat..." then I read a little further down on your post. :rocker


starscream5000
Sep 10 2012, 09:22 PM
:drool


I know, right?!

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MR Bill
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Looking good
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clarkdw


That's the same cam I have in my vert. 3Tech Mike hit it out of the park with that grind. Nice lumpy idle as low as you want to set it but very stable and no loading up. Pulls extremely well down as low as about 2500 rpm with it timed in where Mike suggests.

You can still drive it very economically as it will run down to almost 1k rpm with no balking or nasty character showing up but it is still pulling very hard when the fuel cut hits at 7k rpm. I am now averaging 50mpg U.S. with it although that still does include the occasional boot full on freeway on ramps and winding roads. For my first few tanks after installing it "testing" kept me between 45 and 47 mpg U.S.

With a turbo to make sure the cylinders are well packed this cam will help make a real stormer of an engine.

That is one sweet looking engine. :thumb
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Scoobs
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:D

Id love to get a new cam, mine got assasinated when some floating debris decided to pass through the area, and just destroyed it.... now its in a scrap pile.
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idmetro
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Wow! I am still stuck back at 153!!! Looking forward to your future updates.
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t3ragtop
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Turbo3 and Twincam Tweaker

every now and then i get the urge to fit something to the engine. i have the 17-4 stainless steel head studs torqued, the intake and exhaust manifolds mounted and their a2 stainless steel studs greased up and torqued, the atomizing 330cc/ min fuel injectors installed with new o-rings and seals, the fuel rail installed, and i have the turbo and intake manifold coolant lines installed and insulated.
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i have all the pulleys on the front of the engine, timing and accessory belts precisely installed and string straight, and i have indexed the crank and cam. i plotted the crank against piston location (heighth) in the bore every 5 degrees and made a chart. i also measured the valve lift vs. crankshaft position and made another chart. those charts come in really handy for dialing in the ignition timing and tweaking the injection timing.

i can vary the position of the injection pulse to fit anywhere i want within the range of the intake valve's opening and closing, and i can do it with enough precision that i can actually trim each of the injectors, richer or leaner, to adjust the firedeck temperature of each individual cylinder. one of the problems with the stock turbo3 when you start to increase it's output over the factory limitation is that the stock controls only support batch fire injection and since the #2 cylinder shares space in the cooling jackets with the two outboard cylinders, the center cylinder runs hotter. that usually results in catastrophic failure of the #2 piston's ring lands and all that entails. with sequential injection and the ability to trim each injector, it becomes a matter of opening up the injector time just a smidge to allow the slightly richer afr help to cool the #2 cylinder's firedeck temp. megasquirt is a wonderful thing.
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