Project Turbo 914 begins..., (yes, I know you can't turbo a 914) Options

[ottox914]

Just a little teaser on this winters project. Last winter I dug into this little update:

http://www.914world.com/bbs2/index.php?sho...c=53733&hl=

This winter will be phase 2. This photo will show some of the goodies under the tree, which will soon be under/on the car. The WRX intercooler has one round inlet on the back, and 2 smaller oval outlets under the opposite end tank. These will each exit and attach to some CB performance turbo "hats" for the ITB's that have 2" tubes welded to them. Some silicone elbows, and we're good. The intercooler will mount on braces running across the engine bay to support the intercooler as close to the GT lid as possible. I'll see how it goes, and probably do some yarn tuft testing to see about airflow in and around that lid, but I could always use the SDS computer to switch on either a puller or pusher fan below the intercooler based on boost, if needed. The turbo will mount on a custom flange/adaptor to be built to connect the turbo to the collector of the Kerry Hunter exhaust system. The turbo is a small Garrett VNT. The compressor map looks like a good match for this motor. I'm expecting the VNT turbo to give good low rpm thorttle response. Starting out at 5-6 psi, I'd be happy to see 10 when I'm done, but will tune to run safely on 93 pump gas and see where we end up. Off the back of the transmission, where the factory exhaust hanger mounted, I'll mount a similar hanger to support the turbo and exhaust system. A Tildon differential pump will return the oil to a willing valve cover. Oil will be taken from a "T" at the pressure sending unit on the case. There is a blow off valve to be added to the intercooler, and a mocal thermostat/sandwitch plate adaptor for the oil cooler, which has a thermostat controlled fan. I'll be adding an ignition switched relay for power to the fan and scavenge pump, so both will have power when the key is on. The pump will run continously, the fan when the thermo switch tells it to. Add some pressure side stainless or aluminum tubing from the turbo, thru the back engine tin, into the round inlet on the intercooler and we're done. Except for another trip to the LSE dyno, for some additional tuning. I'll keep posting as progress would warrent.

[ottox914]

Mark Henry- Why DTM, besides your selling Jakes parts in Canada? Won't that be a higher profile, in terms of the overall engine? It would give you some more room up in front of the engine if you were thinking of some header/turbo mount up there. I had some thoughts in that direction, a flat fan over the engine, either electric or crank driven, intercooler mounted on top of that, ITB's, and a turbo mounted in front of the motor, just never got around to getting serious about that wild plan.

We can probably share some SDS notes, but depending on your cam, and turbo, this may or may not be helpful at all.

I'll shoot and post some intercooler shots tomorrow night.

I've talked to Chappy a bit, and done some research of my own. The catch can is more to have a spot for the remaining oil in the lines to the turbo to go, once you shut down, as the turbo spins down, there will be some residual pressure in those lines, and when the scavenge pump shuts off, there is no where for that oil to go, as the turbo spins down, so it can seep past the seals and give you a "puff" at start up, and possibly shorten the seal life. Longer lines between the turbo outlet and scavenge pump will allow more volume for this oil to fill, so long as it doesn't have to go up hill. I plan to add a small sump to my system anyway.

I had an Aerocharger brand (no longer in business) VNT turbo on a ford focus, and was spoiled with the response. I researched availible VNT's and found the VW TDI's to use one of 2 different models, the VNT-15 and VNT-17. The compressor map of the -15 was better suited to what I wanted to do, so I found a NIB turbo on evil bay a couple yrs ago, snatched it up, and kept it on the shelf till I was ready to do this. Don't recall the $$$ exactally, as its been several yrs. 3-400 seems to ring a bell though.


GS guy- yes, I an using the IC "backwards", but airflow is airflow. If you snoop around the turbo topic, and specifically air to water intercoolers, you'll find guys taking ford Tbird IC's, jacketing them, and turning them into air to water systems. With all this going on, reversing the air flow doesn't scare me off of the utility and packaging of this IC with 3 holes in it. As I'm going to try to mount the IC as close to the GT lid as possible, I'll be making a block off plate for the subi blow off valve mount, and adding it in line between the turbo and IC. It could still mount on the IC if I wanted it to, or I could buy 2 BOV's and mount one in each ITB hat. That might be cool, but why buy 2 when 1 will do? This is not a bling-mobile honda we're talking about here...

Mr CrazyHippy- Using the hole in the engine tin for the "J" tube passed thru my mind also, but with the ITB's more to the rear of the engine bay, the packaging of the parts I had, things just worked out better this way. The charge air from the turbo will come up under the trunk, and thru the back verticle engine tin, where a 90 degree elbow will bring it up towards the IC at about a 45 degree angle, and another 90 degree elbow will take it into the back of the IC. I'm not the most visual person in the world, so if that was not explained well enough, the photos will make more sense once I get that far.


This is sort of the inspiration for this little adventure: www.ststurbo.com. I will be adding a pressure switch after the scavenge pump, and running that to the parking brake light on the dash. I put the BMW 320 front calipers on my car, and moved my fronts to the back, and as such, have no parking brake anyway, might as well use that big light for something.

[Mark Henry]

Mark Henry- Why DTM, besides your selling Jakes parts in Canada? Won't that be a higher profile, in terms of the overall engine? It would give you some more room up in front of the engine if you were thinking of some header/turbo mount up there. I had some thoughts in that direction, a flat fan over the engine, either electric or crank driven, intercooler mounted on top of that, ITB's, and a turbo mounted in front of the motor, just never got around to getting serious about that wild plan.

We can probably share some SDS notes, but depending on your cam, and turbo, this may or may not be helpful at all.

I have the DTM mocked up in the car now, the amount of room in front of the engine is huge!
I should be able to mount the turbo in front high enough to drain into the sump, while building the tin so that it is still technically under the car...I may even have enough room to do the same with the intercooler. I'd have to feed it via a scoop under the car.

Our fuel maps will be different but other points in the map may be the same.