Webcam 20/21 questions
06-13-2012, 06:31 PM
#1
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Webcam 20/21 questions
With all the documentation I received with my car, I found that the PO's shop put in Webcam 20/21's. I did some searching but there's not too much info specifically with these cams on a 964. Some people say that they are totally wrong for the 964, other's obviously not.
I guess I'm wondering what the difference would be to the stock 964 cams? I'm guessing provide more HP - any idea how much? Would they move the HP band higher up in the rpm range? Less lower-end torque also? Anything else?
The car runs well and pulls hard but just wondering what the shop was hoping to accomplish?
I guess I'm wondering what the difference would be to the stock 964 cams? I'm guessing provide more HP - any idea how much? Would they move the HP band higher up in the rpm range? Less lower-end torque also? Anything else?
The car runs well and pulls hard but just wondering what the shop was hoping to accomplish?
06-13-2012, 07:10 PM
#4
IHI KING!
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Good point but it can't hurt to ask them too. By the way, Sboxin is building a motor with those cams. You may wan to ask for his thoughts.
https://rennlist.com/forums/964-foru...-approach.html
https://rennlist.com/forums/964-foru...-approach.html
06-13-2012, 11:38 PM
#5
Rob -
We are putting those in our race engine for a bit more HP -- but more for the torque properties across the RPM range.
We are limited on HP for race classing to 248RWHP but we need torque in the 230+ for 3000 to 6500 RPM. We had a class winning car with a 3.2 Aase stock spec engine until the BMW guys put up the 230+ torque engines - they get us on the starts and long straights.
We will have the engine built and running dyno tune in the fall -- we'll have more direct data then. We based a lot of our decisions on the 911chips.com dyno charts, forum discussions, our local Porsche Indi guru (DJ Jackson), Don at EBS in Reno -- and of course talking directly with the really nice staff at Webcams.
The difficult part of this project may be confining the engine to 248RWHP...
Regards,
Roy T
We are putting those in our race engine for a bit more HP -- but more for the torque properties across the RPM range.
We are limited on HP for race classing to 248RWHP but we need torque in the 230+ for 3000 to 6500 RPM. We had a class winning car with a 3.2 Aase stock spec engine until the BMW guys put up the 230+ torque engines - they get us on the starts and long straights.
We will have the engine built and running dyno tune in the fall -- we'll have more direct data then. We based a lot of our decisions on the 911chips.com dyno charts, forum discussions, our local Porsche Indi guru (DJ Jackson), Don at EBS in Reno -- and of course talking directly with the really nice staff at Webcams.
The difficult part of this project may be confining the engine to 248RWHP...
Regards,
Roy T
06-14-2012, 12:13 AM
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Thanks Rob and Roy!
It was actually Roy's thread that reminded me of always wanting to ask this question.
I have a Wong chip and cat bypass but haven't measured anything on a dyno. PO engine builder left the O2 sensor disconnected I think on purpose but am not sure. Curious to engine performance and what others have measured with the cams.
It was actually Roy's thread that reminded me of always wanting to ask this question.
I have a Wong chip and cat bypass but haven't measured anything on a dyno. PO engine builder left the O2 sensor disconnected I think on purpose but am not sure. Curious to engine performance and what others have measured with the cams.
