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> Driving a Turbo Porsche at Lime Rock, for you enjoyment
Andyrew
post Oct 17 2004, 12:07 PM
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Spooling.... Please wait
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.7 or so more bar... or about 10 psi, x 10-20 hp per psi....

ya....
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TimT
post Oct 17 2004, 03:37 PM
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We have a boost controler to hold the wastegate, so dont think its a wastegate problem. When boost is turned up the needle fluctuates between 1.2 and 1.1 bar, someone told me that the greddy blow-off-valves suck, so Im leaning to the BOV's not holding boost,the valve is being pushed off the seat by the boost pressure or something.. gonna get some HKS valves and try them out.Back to Lime Rock next weekend for some more testing
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Dman
post Oct 17 2004, 04:18 PM
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Thank's! (IMG:style_emoticons/default/drooley.gif) Now all I can do is sit here and dream about what it would be like if my Audi sounded like that!

Only time I ever hear mine is next to the center seperator wall on the freeway. (IMG:style_emoticons/default/huh.gif)
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larryp
post Oct 17 2004, 09:25 PM
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QUOTE
I have to bust my ass to do 1:01s with my N/A 1.8L. You do it even having to wait for slowpokes to get out of the way. It looks so easy with a little boost.


If you time it, it looks like he was running 1:02s. It goes to show just how little power gets you there, since the straights are so short. I was more impressed with Steve Savino (944T) and Spencer Cox (Cup car) at the PCA club race, running 57s in the wet.
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TimT
post Oct 18 2004, 06:16 PM
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QUOTE
I was more impressed with Steve Savino (944T) and Spencer Cox (Cup car) at the PCA club race, running 57s in the wet


OK whatever blows your skirt up

I was doing 1:01-1:02 my friend was doing 56-58 (its his car LOL)

For all the critics, we finished a rebuild the night before this event, and decided to get some break in time on the car. Short shifted 7500 instead of 8500 etc..

Racer Chris deserves an AMAZING KUDOS he is turning 1:01 in a 1.8 ltr 914 driving the effing wheels off that car!!

Does Spencer ever drive a car he owns at a race?
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TimT
post Oct 18 2004, 06:18 PM
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Also this car is geared for The Glen or Summit
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Curvie Roadlover
post Oct 18 2004, 06:28 PM
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What kind of camera mount are you using? Very steady horizon despite the dash bouncing around. (IMG:style_emoticons/default/blink.gif)
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TimT
post Oct 18 2004, 06:33 PM
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the camera mount is an IO port mount.... if you set up a camera in a car spend extra time trying to get a short lever arm on the mount..
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TimT
post Oct 18 2004, 06:36 PM
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Very steady horizon despite the dash bouncing around.
\

err also in this car you get the crap beat out of you... I have some datalogs showing acceleration rates... have to distill them
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Brett W
post Oct 18 2004, 06:52 PM
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What turbo do you have? A TE04? I have never seen a T40. Yes greddy BOVs suck the big one. HKS is not much better. Look for Tial they are substanially better. What type of wastegates are you running? I would go back and check the routing and vaccum feed for the wastegates to make sure they are readingt the right amount of vaccum/boost. What are you running for boost control? Electronic boost controller or manual boost controller?
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TimT
post Oct 18 2004, 07:10 PM
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QUOTE
What turbo do you have?


garret gt 40 hybrid... Durabuilt put it together
yes electronic boost controll.

The engine had an HKS 60 , now a Tial 46...

how many of you have tuned 3.8ltr flat sixes?

we dont give a crap about a 1/4 mile times
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Brett W
post Oct 18 2004, 07:56 PM
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I don't tune for the quarter mile either. What the hell is that supposed to mean?


I have very little interest in Aircooled Flat six engines, other than from a novelty aspect. I am sure your customers car is fast and he has no doubt sunk tons of money into it.

here is one flow map:
http://not2fast.wryday.com/turbo/maps/gt40-56trim.jpg

Here is the other.

http://not2fast.wryday.com/turbo/maps/GT40compress.jpg
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Jake Raby
post Oct 18 2004, 08:04 PM
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Damn, that thing is sick!
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Mueller
post Oct 18 2004, 11:04 PM
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i played that a few times at work with the sound cranked up, had to call over a big time BMW fan/driver co-worker to show him a "real" car in action (IMG:style_emoticons/default/MDB2.gif)

does the haltec do any kind of data logging to help out?
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TimT
post Oct 19 2004, 05:35 AM
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yes the haltech can data log, however boost isnt one of the inputs we measure. We log EGT and lambda with rpm.

melted a cylinder earlier this year (IMG:style_emoticons/default/unsure.gif)
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larryp
post Oct 19 2004, 06:35 AM
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OK whatever blows your skirt up


Sorry, I was unclear. I was not trying to making some point about the driving but the difficulty of getting fast speeds there, since hp really does not get you much. Even spec miatas turn 101s. All the extra hp makes it harder, I think, except for passing

By the way, a friend (in spec miata) watched the video and wrote
QUOTE
But he has a nice line.  Too bad he isn't racing anyone
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TimT
post Oct 19 2004, 06:56 AM
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I agree, this car works well at Watkins Glen, at Lime Rock it runs out of room really fast.
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ChrisFoley
post Oct 19 2004, 07:04 AM
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QUOTE(larryp @ Oct 19 2004, 08:35 AM)
Even spec miatas turn 101s.

Someone's been telling you fibs. (IMG:style_emoticons/default/chatsmiley.gif)

The SM lap record is a high 1:03. The fast ones typically run in the 1:04s. BTW, I beat an entire SM field last year with my 100hp (previous) engine. (IMG:style_emoticons/default/laugh.gif)

I think Mike Schrom was doing 50s at LRP in his "935" before he went pro. He had close to 2 bar of available boost I think.
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URY914
post Oct 19 2004, 07:08 AM
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Kinda like "point and shoot" with a 935.

Get it pointed stright and shoot the gas to it.

Paul
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TimT
post Oct 19 2004, 03:37 PM
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Chris, I need to get you to ride shotgun in my car someday, and do a little coaching!!
In my 914 with about 275 hp, I at best do 1:04-5 at Lime Rock.

Driving my friends car was easy with so much power under my foot, Like Paul says, points and shoot
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