I Need More Power...
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
"yep, when I had my OEM converter set to 2300 brake stall, it came off the line like it had 50 more hp.
that was after a chipset, exhaust, all the foo-foo tuning stuff. made more diff than everything else combined. was also the cheapest thing I did w/my u boat.
__________________
85shark With A Few Mods
Can you please go into a little more detail on this please.
that was after a chipset, exhaust, all the foo-foo tuning stuff. made more diff than everything else combined. was also the cheapest thing I did w/my u boat.
__________________
85shark With A Few Mods
Can you please go into a little more detail on this please.
Thread Starter
Burning Brakes
Joined: Mar 2009
Posts: 790
Likes: 0
From: Seat 2A
This makes sense... There seems to be a lot of info on RL about replacing TC bearings and seals, though not much on how to make this adjustment. Is this done from outside the AT and how can i measure it? mucho thanks!
Three Wheelin'
Joined: Feb 2005
Posts: 1,333
Likes: 1
From: Plano, TX
Would be interested in learning more about how to adjust the stall speed on the converter. The combination of 2nd gear starts, 2.20 rear and a low stall speed converter make a powerful car feel a bit sluggish off the line at times.
Road Warrior
Rennlist Member
Rennlist Member
Joined: Aug 2005
Posts: 6,161
Likes: 1
From: SoCal
there are several ways to adjust the TC stall - shims to increase spring pressure so it comes in later, different impeller angles, closer impeller/housing tolorances.
there are also 3 MB OEM converters that already are tuned for specific stall speeds from mercedes, who makes the 722 series trans - 1350, 1600 and 2300.
U can call greg brown at precision motorwerks in anaheim, ca or ted at transmister in orange, ca for details. I think 928 intl has some info too. or just take it to a GOOD TC shop.
cost me about 275.00 to have the shims slapped in a few years ago.
I have a 2.20 rear end, and before I did the TC it seemed that mini vans could keep up for the 1st 50 feet off the line.. had to put an end to that nonsense.
after I did the stroker, it was too high. stall is impacted by motor output too. so if you add another 200 ft lbs or 100 chp, etc...
trick is to match stall w/the beginning of the power /torque curve so you don't waste power, or go too low so the motor bogs down.
for a stock 5L motor - about 2000-2200 is great, IMO
there are also 3 MB OEM converters that already are tuned for specific stall speeds from mercedes, who makes the 722 series trans - 1350, 1600 and 2300.
U can call greg brown at precision motorwerks in anaheim, ca or ted at transmister in orange, ca for details. I think 928 intl has some info too. or just take it to a GOOD TC shop.
cost me about 275.00 to have the shims slapped in a few years ago.
I have a 2.20 rear end, and before I did the TC it seemed that mini vans could keep up for the 1st 50 feet off the line.. had to put an end to that nonsense.
after I did the stroker, it was too high. stall is impacted by motor output too. so if you add another 200 ft lbs or 100 chp, etc...
trick is to match stall w/the beginning of the power /torque curve so you don't waste power, or go too low so the motor bogs down.
for a stock 5L motor - about 2000-2200 is great, IMO
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
475hp/460lb.ft
Road Warrior
Rennlist Member
Rennlist Member
Joined: Aug 2005
Posts: 6,161
Likes: 1
From: SoCal
U can't get a blown 928 smogged in CA, unless you are in an exempt county or commit some kind of fraud, cause nobody ever got their 928 "kit" carb approved.
so be careful w/"modded" cars out here...
so be careful w/"modded" cars out here...
Three Wheelin'
Joined: Mar 2006
Posts: 1,813
Likes: 0
From: San Diego / Las Vegas
Hi 
Sorry but you are wrong ....he is NOT going to get 30 - 50 hp from ANYTHING he does to the exhaust system...
He MAY get 15 to 20 MAX....but I doubt even that much with the early engine...
And Nitrous would probably be ideal for him for the occasional blast away from the traffic lights.....
All the best Brett
Sorry but you are wrong ....he is NOT going to get 30 - 50 hp from ANYTHING he does to the exhaust system...
He MAY get 15 to 20 MAX....but I doubt even that much with the early engine...
And Nitrous would probably be ideal for him for the occasional blast away from the traffic lights.....
All the best Brett
congratulations on being the most unoriginal guy in the world with nitrous, your car is only as fast as your bottle is full.
MSDS headers show gains of 15-25% on all of these cars. The exhaust system does wonders for these cars, and speculation isn't disproving that.
My masters isn't in math but my calculator tells me thats 40 or so hp
http://www.msdsinc.com/exhaust_1.htm
Three Wheelin'
Joined: Mar 2006
Posts: 1,813
Likes: 0
From: San Diego / Las Vegas