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      08-12-2013, 11:37 AM   #947
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I am seeing over nearly 11 if that helps in 2nd and 3rd. I have not done a pull to red line in 4th yet, since it needs to be late at night on a week day to avoid cars and cops.
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      08-12-2013, 11:59 AM   #948
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Damn street racer!

Jealous of the little supercar you've created yourself
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      08-12-2013, 12:22 PM   #949
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Quote:
Originally Posted by seank View Post
I am seeing over nearly 11 if that helps in 2nd and 3rd. I have not done a pull to red line in 4th yet, since it needs to be late at night on a week day to avoid cars and cops.
that fits my correlation of boost to impeller speed a lot more... Are you complete sure you're not hitting redline and causing a boost spike? I'd get a dyno if I were you, you should be near 500rwhp
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      08-12-2013, 02:18 PM   #950
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Quote:
Originally Posted by ZStig View Post
that fits my correlation of boost to impeller speed a lot more... Are you complete sure you're not hitting redline and causing a boost spike? I'd get a dyno if I were you, you should be near 500rwhp
Positive on the red line. When I was having issues, I pushed it to the line. But now, if I gas it to 5000 rpms, I am over 6psi. It is kind of scary. It pulls so strong. I will be interested to see George's figures. I will do a dyno when I can get out at the track and use the Dynojet that we use on the track cars.
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      08-12-2013, 02:20 PM   #951
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Damn street racer!

Jealous of the little supercar you've created yourself
When you get bored and are falling out of love, it will bring it all back. You will fall in love all over again. I still won't be able to compete with the new M5, but she is more beautiful, sexy, and eye catching.
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      08-12-2013, 02:28 PM   #952
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Quote:
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When you get bored and are falling out of love, it will bring it all back. You will fall in love all over again. I still won't be able to compete with the new M5, but she is more beautiful, sexy, and eye catching.
^WHS.
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      08-12-2013, 02:32 PM   #953
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Quote:
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I still won't be able to compete with the new M5.....
Is that before or after you've reached the first corner?
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      08-12-2013, 02:41 PM   #954
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Quote:
Originally Posted by seank View Post
Positive on the red line. When I was having issues, I pushed it to the line. But now, if I gas it to 5000 rpms, I am over 6psi. It is kind of scary. It pulls so strong. I will be interested to see George's figures. I will do a dyno when I can get out at the track and use the Dynojet that we use on the track cars.
you should be able to run mid 11s in the straight line
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      08-12-2013, 11:39 PM   #955
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Well, I did a few more runs today, and I'm definitely not hitting 8psi.

7psi for sure in 2nd gear. 6psi in 3rd. Wondering if there's a way to test my belt for slip, or what else could cause a drop in psi in 3rd gear. Maybe a slow leak....

Still waiting on Jaws Motorsports to quote me on a shipping price for a crank pulley
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      08-13-2013, 12:11 AM   #956
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Quote:
Originally Posted by ZStig View Post
Well, I did a few more runs today, and I'm definitely not hitting 8psi.

7psi for sure in 2nd gear. 6psi in 3rd. Wondering if there's a way to test my belt for slip, or what else could cause a drop in psi in 3rd gear. Maybe a slow leak....

Still waiting on Jaws Motorsports to quote me on a shipping price for a crank pulley
Your getting the same numbers I was getting before using the digital p3 gauge for peak recall. I had to be in 4th to get 8psi. Not anymore.

You knew this, based on your chart.
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      08-13-2013, 08:01 PM   #957
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Anyone know of a source for a ~5.5" crank S54 pulley?

Jaws is beating around the bush
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      08-13-2013, 08:08 PM   #958
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I just out-drove a 700rwhp CTS-v to 4th gear. Guy was double clutching all his upshifts and lurching like crazy. Fortunately my local guy knows who it is (hence the power info), and is mocking him over the phone. He now wants a re-match on drag radials. ppfffffftttttttt. nope, street tires vs street tires baby.
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      08-13-2013, 08:24 PM   #959
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      08-13-2013, 08:49 PM   #960
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Quote:
Originally Posted by seank

Your getting the same numbers I was getting before using the digital p3 gauge for peak recall. I had to be in 4th to get 8psi. Not anymore.

You knew this, based on your chart.
Peak recall is very inaccurate...
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      08-13-2013, 09:01 PM   #961
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Quote:
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Peak recall is very inaccurate...
should be accurate up to about 7800rpm
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      08-13-2013, 09:13 PM   #962
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Quote:
Originally Posted by ZStig
Quote:
Originally Posted by Rated M Roadster View Post
Peak recall is very inaccurate...
should be accurate up to about 7800rpm
I mean as far as spikes. There's no way seank is hitting 11 psi without a spike... That needs a datalog to be proven not a spike, IMO.

Also, where is everyone else's dynos? Still no torque numbers on the G-Power kit, etc.
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      08-13-2013, 10:52 PM   #963
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This new data makes a lot more sense. I'm now considering an oem 5.25" S50B32 pulley, with a 3.11" vortech pulley milled down and pro-grip coated

http://carbiniteracing.com/benefits/benefits.html
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      08-13-2013, 11:02 PM   #964
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Quote:
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I was just on that site; thinking about sending my 11 psi pulley in to get coated.
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      08-13-2013, 11:05 PM   #965
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Quote:
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I was just on that site; thinking about sending my 11 psi pulley in to get coated.
11psi?

definitely coat that bad-boy. Seems like a much better deal to run a small coated pulley instead of a custom $$$ crank pulley.

I love that we now have a team of blown Z4Ms, pushing each other to the limits through combined research efforts, trial and error, and big balls of steel.
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      08-13-2013, 11:13 PM   #966
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Quote:
Originally Posted by ZStig View Post
11psi?

definitely coat that bad-boy. Seems like a much better deal to run a small coated pulley instead of a custom $$$ crank pulley.

I love that we now have a team of blown Z4Ms, pushing each other to the limits through combined research efforts, trial and error, and big balls of steel.
I tried it out for a while; slips around 7k rpm. It runs about 52k impeller speed.
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      08-14-2013, 09:08 AM   #967
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What size pulley?
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      08-14-2013, 03:31 PM   #968
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Quote:
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What size pulley?
4.5 crank and 2.5 SC
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