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#11 Re: turbo A15 being built
phunkdoktaspok Posted on: 2002/10/30 11:16
Like Isaid old factory american setups ( some ) use a blowthrough setup with the carbie in a box ( this makes equil pressure around the carbie so the gaskets can handle the boost pressure


#12 Re: turbo A15 being built
dimlight65 Posted on: 2002/10/30 14:46
This isn't really a reply to anyone in particular. I just wanted to say I got all the engine parts for my turbo project back from the machine shop last night.
A-12 block, bored out for
A-14 .040" oversized pistons
A-12 rods with full floating wrist pins
A-12 crank fully balanced
A-12 head with TRIPLE valve springs
ARP head stud kit
Nissan Motorsports Metal head gasket
And everything is coated with either antiheat or antifriction stuff as the situation warrants.

So, here comes my usual lie: "Oh, baby. Of course I love you." No, wait. Wrong forum. The usual lie is "I'm going to take some pictures of these parts and post them."

I'm still debating with myself on the FI versus carburetor issue. Tensandtwenties gives me a parcel of crap every time I whine about the price of the FI's ECU.
"You have no problem dropping $1500 on the A-12 bottom end but won't pay that for the ECU?" Then I get a whack on the back of the head.
It's hard to justify all of this cash outlay on a car that I paid $5 for. Geeze, I'm an idiot!


#13 Re: turbo A15 being built
bent_axel_bob Posted on: 2002/10/30 16:33
ok why not use a blow throu lpg set up just has to be a positive presure setup not a negitive presure and as far as the a series goes i havent seen one with bad bottom end yet and are fully able to handle boost up to and perhaps over 1.3 bar i think u would be hard pressed to find an engine as strong for the weight


#14 Re: turbo A15 being built
dimlight65 Posted on: 2002/11/2 22:56
I just posted some pictures of my turbo bits in the photo section.


#15 Re: turbo A15 being built
simmodat1200 Posted on: 2002/11/5 4:07
Could Bent-axle-bob plz put a shirt on? hehehehehehe

phunkdoktaspok - these friends of yours, how was the turbo manifold off the exhaust done? What did they do about the intaje side of things?


#16 Re: turbo A15 being built
phunkdoktaspok Posted on: 2002/11/5 7:17
Fisrtly is Bob so sexy he is distracting you from reading? lol!

Exhaust manifold - Some were standard exhuast manifold with a J pipe curling back up towards the front to mount the turbo and some were hand made extracter style manifolds!

The extracter style manifolds caused the turbo to spool up about 1000 rpm earlier!
But it was found that for street use the J pipe was better as the exhaust gases had a chance to cool down a bit before it got to the turbo! and this reduced the amount of heatsoak the turbine housing induced to the compresser housing! Over all reducing the compressed inlet charge dramatically!
( Not as important on a drag car as they only do 1/4 mile then shut the engine down! )
In theroy if a longer extracter manifold was made it would give the same benifits to a street car as a J pipe manifold, maybe even a little bit better!

Intake - A simplle hat was made for the carbie using about 2 inches of 3 inch exhaust pipe fitted with a top and bottom!
The bottom side having a hole the same size as the top of the carbie! and a rubber ring was attached to this to seal the boost! ( the rubber ring is the same as on the factory air cleaner or we were getting them off of Ford Laser air cleaners!)
The top side had a single hole drilled into it so that it mounted the same as a standard air cleaner!
From the side of this hat a piece of exhaust pipe the same size as the intercooler outlet was welded on and then the rest of the piping was connected to this!!

Hope this answers your questions mate!
Anymore feel free to ask!



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