Twin Turbo 928 fixed and back out there terrorizing the streets!
07-04-2010, 09:24 AM
#136
Race Car
How do you think the rest of us feel who do not have a "Get out of Jail free" card.
The chances of you going to jail for running triple digits is remote at best, they catch my white *** running 125 and I am going to jail.
Not that I have a problem with giving LEOs a break, it is just a fact of life, call it professional courtesy, unless a different department or some other LEO has a hard on for you, in most cases they are going to let you walk with nothing but a slow down.
The chances of you going to jail for running triple digits is remote at best, they catch my white *** running 125 and I am going to jail.
Not that I have a problem with giving LEOs a break, it is just a fact of life, call it professional courtesy, unless a different department or some other LEO has a hard on for you, in most cases they are going to let you walk with nothing but a slow down.
07-04-2010, 10:15 AM
#137
Nordschleife Master
Thread Starter
You can buy that cold air intake and air filter system, install it on a NA car, take out the stock air filter element inside the box, and see if it makes any more power than stock. I would guess that most of the impact would be visual and the engine power would not be impacted much if the engine is otherwise stock. I do like the look though.
07-07-2010, 08:07 PM
#139
Archive Gatekeeper
Rennlist Member
Rennlist Member
Perfect conditions for dialing in (back?) the spark...
07-07-2010, 08:44 PM
#140
Nordschleife Master
Thread Starter
Since it's an '87 S4, one doesn't have to retard it to a retarded level.
The thicker top pistons, lower compression ratio, and the PPF rods of the bone-stock '87 help a lot and allow running advance closer to (not saying close to) the best power spark advance. 60 lb/h injectors, -10AN fuel lines, and 175 gph fuel pump probably aren't hurting either.
Even with an '87, it's better to disable the high-load EZK spark advance, though... ;-)
The thicker top pistons, lower compression ratio, and the PPF rods of the bone-stock '87 help a lot and allow running advance closer to (not saying close to) the best power spark advance. 60 lb/h injectors, -10AN fuel lines, and 175 gph fuel pump probably aren't hurting either.
Even with an '87, it's better to disable the high-load EZK spark advance, though... ;-)
07-07-2010, 10:46 PM
#142
Nordschleife Master
Thread Starter
Why not?
7000 rpm seems like a reasonable number to me. It's not too far above the stock redline and people have successfully run the stock rotating assembly to that rpm level (and higher).
Too much torque breaks transmissions, is associated with detonation, etc. Since hp = rpm*torque/5250 and since I want to make a fair amount of power, it seems to me that one should put push both the torque and the rpm right to the safety limit. That's perhaps unorthodox, using boost and high rpms.
Another one of my idiosyncratic views is that one should really turn up the boost on the otherwise stock S4 engine after 5500 rpm. Few agree with me...
7000 rpm seems like a reasonable number to me. It's not too far above the stock redline and people have successfully run the stock rotating assembly to that rpm level (and higher).
Too much torque breaks transmissions, is associated with detonation, etc. Since hp = rpm*torque/5250 and since I want to make a fair amount of power, it seems to me that one should put push both the torque and the rpm right to the safety limit. That's perhaps unorthodox, using boost and high rpms.
Another one of my idiosyncratic views is that one should really turn up the boost on the otherwise stock S4 engine after 5500 rpm. Few agree with me...
07-08-2010, 12:13 AM
#144
Race Car
Why not?
7000 rpm seems like a reasonable number to me. It's not too far above the stock redline and people have successfully run the stock rotating assembly to that rpm level (and higher).
Too much torque breaks transmissions, is associated with detonation, etc. Since hp = rpm*torque/5250 and since I want to make a fair amount of power, it seems to me that one should put push both the torque and the rpm right to the safety limit. That's perhaps unorthodox, using boost and high rpms.
Another one of my idiosyncratic views is that one should really turn up the boost on the otherwise stock S4 engine after 5500 rpm. Few agree with me...
7000 rpm seems like a reasonable number to me. It's not too far above the stock redline and people have successfully run the stock rotating assembly to that rpm level (and higher).
Too much torque breaks transmissions, is associated with detonation, etc. Since hp = rpm*torque/5250 and since I want to make a fair amount of power, it seems to me that one should put push both the torque and the rpm right to the safety limit. That's perhaps unorthodox, using boost and high rpms.
Another one of my idiosyncratic views is that one should really turn up the boost on the otherwise stock S4 engine after 5500 rpm. Few agree with me...
07-08-2010, 03:06 PM
#146
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Turning the manifold pressure up at higher RPM's and load is almost a requitrement for serious power. The restrictions between the manifold and the combustion chamner, those nuisance things like ports, valves, guides, etc, become more of a factor as flow demand increases. The time-to-flow duty time for each cylinder decreases, and the inertia of the air doesn't change, so more pressure upstream of the restrictions is needed to maintain mass flow.
Makes perfect sense to me!
Makes perfect sense to me!
07-08-2010, 03:41 PM
#147
Nordschleife Master
Thread Starter
Growing up a neighbor had a spectacular yellow 1983 Ferrari 308GTS Quatrovalvole (one of the very first in the U.S.). He quite regularly ran it up around 9,000 RPM, 2,200 RPM above the redline for the QV if my memory from my teenage years serves me right. No idea why he did that except it sounded pretty freakin' cool!
Note that this is not a test pipe to replace cats, or a section of the down pipe. It's the complete turbo-back exhaust for one side. Should give a good baseline to which one can compare the full catted exhaust.
Makes one wonder what the car will sound like at 7000 rpm with just these on, though.
475hp/460lb.ft
07-08-2010, 04:38 PM
#150
Rennlist Member
Turbos are very effective mufflers.... only they dont do a very good job under decell/breaking procedures. That will be a bit on the loud side when the gates dump. I cant wait to hear it.