993PET

I'm looking for a used 996 Cup ABS Control Unit Part # 996.355.049.92. Please email me at jfawsitt9@yahoo.com if you know of one for sale.

Thanks,

JF

Darren

Me too!

dan212

What is the difference between the Cup and "normal" abs?

bobt993

2 seconds

993PET

Amen!

wanna911

Please elaborate how ABS makes you faster......... Isn't the idea not to ride the ABS?

Larry Herman

Yes it is. The Motorsport ABS units are calibrated to a much higher threshold to compensate for the higher grip of race tires. Otherwise, you are underbraking due to the earlier engagement of the street ABS.

bobt993

No. Especially when you have a performance based system. Pro coaches will teach you how to do this if they are comfortable with your car control. Do a little research on how Patrick Long uses ABS for turn entry. Subtle inside wheel ABS application = much faster corner entry. Stock systems are limited to around 1g. My track data shows lateral grip levels of 1.6g in many corners, but only a little north of 1g in braking due to the limits of the stock ABS controller.

bauerjab

Larry,

I don't follow. Isn't ABS determined by a sensor which senses the wheel is not rolling any more. If that is the case, why would a tire with more grip make a difference in terms of when the ABS initially kicks on.

I am not disputing the ABS cup is way better. Everyone knows that it is.

Larry Herman

I am no ABS expert, but I think that it has something to do with the overall rate of deceleration of any wheel, along with the comparison to the other wheels. I do know that the motorsport unit will not kick in nearly as easily, and will allow for more "slip" in the tires under braking, and that can be used to generate much higher braking forces.

bobt993

John,

Look at it this way. The racing ABS systems allow max grip on the unloaded tire(s) during weight transition. This system is constantly avoiding full lockup at a rate your foot cannot duplicate. Without effective ABS, your limited to inside wheel lockup during corner entry. I know I am turning in well when I am not sure I will make the corner apex and I am still on the brakes. ABS intrusion should not be excessive. I feel it in the steering wheel not the pedal. Corner exit is easy then as we all know how to get on the gas to avoid spinning. BTW I have some really good data for you at Tbolt (some 27s, 28s)

bauerjab

Thanks Bob. My 964 Cup ABS is putrid (I think it's the same as stock). When it kicks in, it just lingers and everything goes dead. As for the data, feel free to email me. Thanks.

bobt993

Will do. Ask Larry or Joel Reiser. I thought the 964 Cup ABS should be pretty good (4channel). Maybe I am wrong. Cervelli and Geoffrey would absolutely know. Larry and I worked with 6 drivers the other week. We had one guy progress from a 37s to 33's in a little better than street 993. If he prepped it for H, he would be running near the front.

wanna911

I'm still having a hard time picturing how this could work to shave fastest lap if you hit the brakes near perfectly with regular abs to be right on the edge without the ABS kicking in. Are you saying that the ABS is kicking in before loss of grip anyways?

I can certainly see how it could be way better once ABS is engaged. But the other part is baffling. Any more information on it? Articles etc.?

Are we saying that Cup ABS is better than threshold braking, or that street ABS doesn't allow full threshold braking. Has to be one or the other no?

bobt993

Your likely not really trailbraking yet. Threshold, max straight line braking transitions to loaded cornering/ trailbraking (still slowing the car to the apex). If your doing this to the max, then the ABS system is correcting wheel lock up during weight transfer. This is key. You don't have 4 brake pedals in the car to do this on your own. The more advance systems have a very high threshold and monitor the wheel slip at a very fast rate. Plenty of reading on this, but your best way to learn is hire a top level coach that is willing to push your skill set. If you hit every apex now, then your not entering fast enough. I learned this by having the correct person in the passenger seat.