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AKA-Turbopowered68 1968 Chevelle Turbo 3.8 11.74 @ 114 1987 Regal Turbo 3.8
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A little update on my turbo Nova, changed the wastegate to a 60mm HKS knockoff , works great rock steady boost pressure.I run 7 psi as "everyday" boost, more that fast enough . Other than that i have been cruising it in the nice summer weather.I attended the 4 July Midnight cruising here in Norway, alot of American cars there. I think i can safely say i was the only turbo inliner there. I had the car loaded with 4 pepole and it was pretty fun pulling some of the V8 guys with their new "crate" engines, they are like WTF was that???? Look at the super duper defroster in the rear screen, has been there since the car was new.
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Bosanova,, if you could post a video,or link & more pics of your car running,,, accelerating ,,or,spanking a V-8 thingy,,or,,??
That would be way cool.
MBHD
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Also bosanova I wouldn't mind having some video of that as well for my web site.If you wouldn't mind Thanks.
Larry/Twisted6 [oooooo] Adding CFM adds boost God doesn't like ugly.
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Here is a little clip of it idling. This is all the video i have of it right now, but some more videos is in the works.
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Bosanova, thanks for the clip.
Pictures would be nice also.
MBHD
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Any new updates?
I noticed the Mitsubishi alternator? on the Right hand side,,how did you mount that? Seen on your photobucket album.
Just curious.
MBHD
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Not really any new updates, just been driving it through the summer. As to the Mitsubishi alternator i made up brackets for it and bolted it on . I use those alternators on all my old cars , works great and are small and light.
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Hello! I managed to find some time to put the Nova on the rollers at work. Mainly to do some fine tuning on part load and transition. The dyno is a Mustang brand with a eddy brake. It made 380whp at 5070rpms and torque was 412wlb, this is at 16psi in the manifold.The pulls where done in 3rd gear. I know you guys like dyno stuff and videos, so here you are. A pic to
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Ahhhh, very nice!
Sounds great!
I thought you run more boost than 16 PSI ???? Video is great!!!
Nice stock looking Nova A.K.A. sleeper!!
MBHD
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Just noticed that some of the pictures in this tread is gone, so i am putting them up again. I am also working on a new engine for the ChevyII going to use a Precision 78GTS turbo will try for 1000hp on the flywheel, will post some pics and info on that engine as i get a little further along with it. [img] [/img]
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Ahhh, very nice again I will say,!!!!!!!!!! Awesome ride!
Did something happen to this engine? 250 CI
Could you state the specs on this engine for now?
Cam specs,compression,etc. Boost pressure?
Valve sizes,boss on intake port there? TB size? Turbo specs, just for refreshing us again.
B.T.W.,any close up shots of your alternator brackets? I always liked the Mitsu alternators being small & light.
Thanks
MBHD
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Specs are 250cui,TRW forged pistons, 1.94-1.6 valves boss still there, head somewhat ported , Crane 204-216@50 112LSA,comp 8,5:1, TB size around 65mm, Turbonetics T76 Q-trim, HKS 60mm gate, 120lb injectors, Accel DFI.
Boost usually 7-16 Psi. Nothing happened to this engine... yet LOL. Trying to get a intercooler on it during the winter, and i am going to really push it hard when the season begins. Would be cool to see over 500rwhp on a somewhat stockish engine.
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Very impressive power! I like the setup. Have you ever taken it to a track or gotten performance #'s for acceleration?
Inliner Member 1716 65 Chevelle Wagon and 41 Hudson Pickup Information and parts www.12bolt.com
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I would say it should run easy 12's if not 11's if set up properly.
He said it does have a slow spooling up time in 1'st,big A/R on turbine housing IIRC.
Light car + all the HP,WOW!
MBHD
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Yeah, mine is a pig compared to the chevyII. 3750 with me in it. Spools just fine though. Tom
Inliner Member 1716 65 Chevelle Wagon and 41 Hudson Pickup Information and parts www.12bolt.com
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By your spools up just fine,,,does that mean you can hold the brakes & get full boost & launch? Just curious.
MBHD
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No , can't do that. That would be holding back alot of tq, too hard on my little ole 700r4, which I am surprised has lasted this long. Tom
Inliner Member 1716 65 Chevelle Wagon and 41 Hudson Pickup Information and parts www.12bolt.com
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It's fairly obvious I do not know all that goes into a turbo, let alone a twin turbo, application. There are many on this site that have years of practical experience and knowledge on this subject. Althought this was an exercise in pure conceptual and perhaps visual accomplishments, it has led me to think of a more practical Horsepower gain solution. This idea, still in it's infancy, will utilize off the shelf products but used in a unique combination with each other. An alternative to superchargers and turbochargers that I think will result in the same horsepower if not a good precentage more! It would be a simple bolt-on afternoon installation with no advanced mechanical degree needed. Simply, a "kit" that could give your motor a large "Kick". Please be patient while I still gather more info on this idea. I will present it here for all to critique soon.
Loud Pipes Saves Lives!
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No , can't do that. That would be holding back alot of tq, too hard on my little ole 700r4, which I am surprised has lasted this long. Tom I think my Sy is a lot harder on a 700 R4,AWD,3600 lb truck w/ no driver. Last time dynoed it made 386 HP & 550 ft lbs of torque. That is why guys w/there modded Syclones & Typhoons switch to a 4L80E,then they can beat the crap out of them & not have any tranny problems.
I can launch @ 5,10,15,or 20 PSi w/the stock 2100 stall converter,would be a lot easyier if I had a 2600-2800 stall, not overheat & still lock-up the converter for decent gas mileage.
I recommend a TCI unit from rusty in AZ,billet cover 9" w/an 11" lock-up disc. I would like to get one,but no extra $$$.
I think I have been lucky w/my 700,I think @ the power level it has, the tranny should let go.
Generally, I do not launch above 10-15 PSI, but you need to be able to boost launch your vehicle if you want to run any good 60 ft time or 1/4 mile time. Last 60 ft time was 1.68 MBHD
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AKA-Turbopowered68 1968 Chevelle Turbo 3.8 11.74 @ 114 1987 Regal Turbo 3.8
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Any new updates lately?
MBHD
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Can someone educate me about something please?
On the passenger side of this engine there is an aluminum canister with a breather on it. It has hoses plumbed to it from the front and rear of the valve cover. It seems to be there to collect oil, but why?
Thanks: Paul...aka Xerxes
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Turbo motors tend to produce more blowby. This is a method to vent the crankcase effectively so all your gaskets don't blow and seep oil.
"The first rule of overkill: You can never have too much overkill." "Overkill is underrated."
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The amount of trapped pressure released is still a function of the exit area (the breather), but the can has 2 advantages: 1. more oil will settle out (the air inside the can is "quieter"), thus less oil goes out the breather 2. the extra volume inside the can slows down the "huffing" effect of the pistons going up & down and averages the pressure (the crankcase volume varies constantly due to rod geometry - the pumping never balances out)
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Guys w/there turbocharged LS series engines run vacuum pumps to there crankcases.
MBHD
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I thank vacuum pumps are the best way to go, but they are definitely not free, and they're hard to hide.
"The first rule of overkill: You can never have too much overkill." "Overkill is underrated."
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Right - something has to drive it, it needs brackets and adjusters, plumbing to a masked source, and $$$. A JY smog pump is a help, but not big enough. I like to design in as much "passive" stuff (no or few simple moving parts, tuning is done by size and path routing) for oil control and pressure management as I can. A can for breather expansion can be improved a bit, but it's not easy. 1. the holes from the valve cover should be as big as possible to kill velocity. 2. crankcase pressure reaches the head through the pushrod drains, and they're not as big as I'd like (plus, the vapor carries the oil back up with it), which is why some plumb a big hose or pipe from the tappet cover or the side of the oil pan, or timing cover directly to an expansion tank. 3. if you have an electric fuel pump, the pump hole can be a pressure take-off. 4. if you still have oil spray at the last breather opening, make the pipe supplying it vertical, as tall and large ID as possible (before hood clearance).
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I have taken the Nova out of its winter hibernation, and it looks like the TPS is broken. It seems it was partially broken last year to when i had it on the dyno, because the logs show the tps % is flying up and down during the pull. Still working on a new motor for it and also working on a intercooler. I really want a air/air intercooler but i dont want to cut to much on the car, so its kind of difficult.
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I see your video on youtube & there are questions for you.
Intercooler installed yet?
Or @ least show us some pics of your intercooler.
Thanks
MBHD
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WHAT HAPPENED TO THIS THREAD?!?!?!?!?!?!
This is awesome! I would love to see what this would do on a 0-60 or a quarter
69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.
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