Ram Air TGP

Started by TurboGTU, August 13, 2003, 11:50:24 PM

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TurboGTU

Have any of you guys ramed air your tgps..I've heard nothing but good news about ram airing a turbo so it won't have to work as hard to make boost. I'll see what it'll do but have anyone tried it?
Turbocharged 88 IMSA Beretta GTX <-dam stright.
90 ASC/McLaren Black TGP.

Powermaster slowed my progress like I was piloting the Queen Mary herself--

90TGP

Probably the closest thing to making a RA for a TGP would be the K&N filter on the turbo.

I'd like to get a RA scoop on my hood one of these days and then have an intake fabbed up so that it's directly under the scoop opening.

maximage

I would think there would be a way to convert the drivers side louver to work as a cold air box. I'll have to check it out when I get home....
90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

TGPilot

Hey Max...I was looking into that at one time, but the only problem is there are many things directly under the stock loover location. But a pressure box that fits directly onto the turbo inlet and fab some sort of low profile scoop to face into the wind on the hood! That would be real trick I think!!  :wink:

maximage

I know the cowl induction on the older t/a's worked in a similar fasion. the cowl faced the back of the car, but pulled nice cool air in. Not a ram air, but better than the cone on the turbo. Otherwise, I wonder if there would be a way to plumb something to the drivers side wheel well or something..... I'll have to do some playing around. That is, if I keep the car. Thinking about selling it once the new trans is in.
90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

GPChief

I just leave my hood open about 10 inches all the time, works just like a ram air!  At first it was hard to see over the hood, but since it bounces up and down over the bumps its not that bad anymore, espically since my hood release (finally  :twisted: ) broke off.  I'll take some pictures (COPYRIGHT of course) I think this is the wave of the future for TGP / STE' ers.

I plan on selling the piece of 2x4 that props up the hood for $50.00 due to the amount of R & D that went into this mod.

On the cutting edge of technoligy.....
2004 GTP -  3.8 Blown - Only modding for MPG.
1997 GTP  - 3.8 Blown - Too many mods to list.
1996 GTP - 3.4 DOHC - Twin to my 1997.
1995 SE - soon to be a 3.8 turbo car.
1990 TSTE x 2 white cloth
1990 TSTE x 1 maroon leather
1990 TGP - 5 speed.

maximage

90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

Mike J.

There have been some decent cold air inductions systems fabbed up by owners.  Just getting cool air + having a low restriction K&N cone are very beneficial.  One guy who used to drag race his regularly, removed his drivers side headlite.  I don't know if this was for a ram air intake or just to get more air to the intercooler.  Removing the a/c condesor fins in front of the I.C. helps to cool the charge a bunch I hear.  I wrapped my I.C. to Throttle body intake hose with header wrap to keep the charge cooled.
An Idea just occured to me that since ram air will get slowed down by every bend before it gets to the air filter, the best way to over come this loss in velocity it to put the air filter actually in the stream of air going down the road.  This will force air thru the filter by schere velocity of speed.  Then the losses of velocity should be reduced since there will be less collideing of the fast wind against blunt walls.   Blunt walls will slow down and reduce ram air by a huge degree.  Sound logical ?
Twin black 90's

god910

I've been working on one for my Cutlass, but now that I have this TGP (and once I get it running)  I will transfer everything to the TGP that I have thought about.  Since the guy I bought the car off of cut two damn holes in the hood of the Blact TGP, I will use it as the practice hood.  I am planning a small ( 6-9" wide and ~8" deep, maybe 2" high) ram air scoop right above the lower 1/2 of the air box (cutlass mind you)  I was gonna cut the rear to fit the CAI that I made up so it fit in the channel of the box.  Then cut the hole and fab up a kevlar or carbon fiber scoop.  and seal it back up, creating a pressurized box.  A ram air hood vs. a typical hood scoop is that a ram air hood (on an N/A car anyway) is only good above ~60 MPH where as a scoop will you aerodynamics to create a vortex forcing air backwards into the area under the hood.  But a turbo car pulls MORE in, so I would have to think harder about it.  We'll see.
1990 Turbo Grand Prix Black Sunshine
282 5 speed, Custom Chip, 1G DSM BOV, K&N on turbo, Centerforce Clutch, Accel 8.8 Wires, no kat, straight exhaust, TB bypass (200HP), Jeff-M cro$$over ;)
Jay Warfel
Muncie, IN
2nd TGP "TestBed" 90, Black JeffM TG160 & X-over, ractive filter, 15.21 @ 90 mph
2003 Sonic Yellow Subaru Impreza WRX  Turbo XS Stage 3
Perrin GT35R, 2.5 STi Block, JDM 6 speed swap underway.
Goal: 450 AWHP, mid 11's.

maximage

The other option I had tossed up in the air was taking my spare hood and building a cowl, and making a vent in the front of the cowl similar to a ram air trans am.
90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

TGPilot

Quote from: maximageI know the cowl induction on the older t/a's worked in a similar fasion. the cowl faced the back of the car, but pulled nice cool air in. Not a ram air, but better than the cone on the turbo.

Actually Max...my 70 T/A had the functional shaker hood scoop. Functional meaning the door in the scoop would open to allow "pressurized" air down into the intake. At the base of the older T/A and Camaro windshields there is actually 15+ pounds of pressure when you are at 45 MPH and above. So when they say cowl or ram air induction on the older cars with more vertical windshields, they actually worked! :shock: This will be on Ripley's believe it or not! :lol:  :lol:   I have no idea what pressures are there in todays stream-lined cars...but in the olden days they actually worked even though they pointed to the rear of the airflow... 8)

maximage

I was thinking more like my cousins 84 Recaro T/A. It's sleeked back like the gp, and when it rains, you can actually watch it pull the raindrops in. Not that thats a good thing, but I'm sure the design could be improved upon.
90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

TGPilot

Sure...but a little water going into the engine wouldn't hurt it. They use alcohol or water spray kits that blast right into the intake stream to cool the charged air and reduce knock in many turbo applications. Plus it will steam clean the inside of the cumbustion chamber!! :lol:

8)

maximage

I was just hinking the excess water could soak the air cleaner and cause a loss of breathability.
90 TGP- Mods, yeah I have them...
90 DSM Turbo 5-speed
02 Beetle GLS

Look! I finally updated my sig!!

Jeff M

From my studies and classes, Ram Air is only good once you get into triple digit speeds!  For sure a Ram Air is still a CAI and that?s good, just no easy way to do a CAI with the limited space in the front of the TGP.  Only 2 streetable and viable options I can suggest are to move battery to the trunk (less weight on the front/traction wheels, oh well) and use that space to build an air box, or the one Pontiac Jeff made a while back that tucks into the lower front area of the driver?s fender well.  Non streetable is to pop the headlight out and let a big old K&N hang out the front there, seen that one done for a 13.56  et TGP I worked on.  Yes water is a concern, too much and the air filter loads up restricting air flow AT the air filter contact point, specially an air filter with some absorbency which K&N and others have, though the K&N is oil soaked, this oil dries as dust and such collects on it, and a good bath of rain water will flush those impurities into the intake air stream, so good point to avoid the risk of excess water contamination!!   Metered control and a supply of clean-filter water/alcohol injection can be a good thing if someone is pushing hard the limits of power making, but this is done when all other typical areas of performance improvements are exhausted.  And just to cover my bases, the point I made on Ram Air above comes from David Vizard who is THE guru of engine air flow, he is highly respected in many race series doing Formula 1 and everything else in between.  And this also stated by Ken Sperry and Pat Baer of GM MotorSports and Dodge MotorSports.  BUT don?t give up trying to find better solutions though!!!

Jeff M