Well, I have been bouncing back and forth between to turbo my ln2 or not. I'm using this for an autocross setup. For now I can only afford the turbo and it would have to run on stock internals, or the second option would be cam, header, short shifter, intake, exhaust, and a port & polish. I really have no idea what to do, i love the idea of turbo but on stock internals would it be any faster than the other things? Thanks, in advance for your advice.
the only problem is the stock internals. Would a turbo w/ stock internals with a tune be faster than the other stuff and a tune?
^^^^ oh hell ya. there are people on her runnin a little over 200 ponies on stock internals. correct me if im wrong though
Don't waste your time with bolt on's if your going to turbo the car peice a quality kit together and get a solid tune. I've owned an ohv and had all the bolt ons...and it was still as slow as hell. If your going to autocross the car you do realize that the turbo setup will put you in a class that you won't be competitive in at all. I would sugest a solid suspension setup first and getting lots of track time in then work on the power. The stock ohv is pretty stout you can easily make 200-250whp and be fine with a solid tune.
I am fairly new to autocross. I have attended 4 events (2 from 2009 season and 2 from this year). I currently run in Street Touring class. The last event I attended was on April 11, and I was able to take 2nd in ST. My competition (in placing order) was a (1st) 2000 Subaru Impreza 2.5RS, (3rd) 2001 VW Jetta (turbo), (4th) 1988 Honda Prelude, (5th) 1998 Subaru Legacy GT and a (6th) 2006 VW GTI. Two of the five driver that I classed with (1st & 4th) are seasoned autocrossers. For reference, the 1st place was 4.553 seconds faster than me and the 3rd place was .461 behind me.
What class do you currently run? What is your competition? From personal experience, I would keep the car with the bolt ons (header, exhaust, and intake). This should keep you in Street Touring class, depending on your region. I would also upgrade the brakes (HAWK), suspension (Koni, Tein, Tokiko D-spec, etc.), wheel (the lighter the better) and tires (Kumho XS, Dunlop Star Spec, etc.)
You should first improve on driving the car to its limit. I feel that the OHV 5 speed cavalier/sunfire can be competitive within the ST class.
My car was set up at that event as follows:
Engine:
• E-bay $40 cold air intake with generic filter
• AEM bypass valve
• RK Sport polyurethane engine mount insert
• RK Sport polyurethane dog bone
• Turbo Tech Racing polyurethane transmission mount bushings (2)
• AEM clutch reservoir holder
• Valve cover breather filter
Suspension:
• Eibach front and rear sway bars
• Freedom Design front and rear strut tower mount brace
• Koni Yellow Shocks (sleeved in stock housing) and Struts
• Eibach Sportline Springs
• OEM Rear solid strut mounts
• Kazera 17x7" KZ-S 40mm offset
• 225/45/R17 (rear) NEXEN N3000 Tires and (front) Fuzion HRi Tires
• Prothane Polyurethane control arm bushings
• 1999 front strut mounts with new bearings
• New ball joints
• New tie rods
• New half shafts
• New wheel bearings
• alignment -- all in the green with maximum negative camber allowed.
Interior:
• B&M Short throw shifter
• Autometer tachometer
• Apexi indeglo 2.0 bar Boost gauge (for motivation to boost)
• Sunpro Oil Pressure
• Sunpro Oil Temp
• Sunpro Voltmeter
Exterior:
• Keystone Brickyard 3 piece spoiler with LED brake light
• Metal Z3 fenders
• Side moldings removed
Audio:
• Memphis Car Audio M Class Coaxial front & rear speakers
• Kenwood flush mounted tweeters forward & above door handles
• Panasonic MP3/WMA CD player/receiver
• The Big 3
• Cooling Fan Mod
• DRL disabled (switchable)
--------------------------
NCR-SCCA
greeneco wrote:^^^^ oh hell ya. there are people on her runnin a little over 200 ponies on stock internals. correct me if im wrong though
200? How many pounds can the ohv handle?
how many autox events have you run?
more hp = higher class = no chance at being competitive, especially for a novice.
Chip Helmick wrote:greeneco wrote:^^^^ oh hell ya. there are people on her runnin a little over 200 ponies on stock internals. correct me if im wrong though
200? How many pounds can the ohv handle?
theres no way to give a specific amount of boost/psi's than an engine can handle. much more comes into play with fuel, tuning, and the characteristics of the turbocharger itself.
if you are going to boost theres are many different sources around the internet that can help you gauge the correct size turbo for your engine/boost levels that you would like to accomplish. but regardless of what size you get i would recommend starting off at very low boost levels and increasing with proper tuning/monitoring of the engine.
like others above had said though, you will definitely want to try doing autocross a few times before you boost the car. suspension is the key when it comes to auto-x. with the turbo you will be put much higher up on the class ranks and you will struggle to be competitive unless you are an immaculate driver.
Eat my shift
HP breaks parts... worry about how much power you want to make instead of worrying about boost pressure.
Determine the HP numbers you would like and pick a properly sized turbo that will achieve these goals for you while giving you the desired power band. My guess for you (if you autocross) would be something that will spool quickly. Possibly a Garrett GT-r turbo or a Borg warner.
