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Search took 0.14 seconds. Search: Posts Made By: Dr J

Forum: Porsche 911 Technical Forum

01-06-2026, 07:23 PM

Replies: 23

EFI tuning

Views: 547

Posted By Dr J

Like others have said, you do not need VSS for...

Like others have said, you do not need VSS for EFI tuning of these 911s. However, for other purposes, I have VSS on my EFI. I simply connected the A terminal from the tach to the EFI’s VSS input....

Forum: 911 / 930 Turbo & Super Charging Forum

11-26-2025, 07:00 PM

Replies: 17

Water-to-Air Intercooler vs Water/Methanol Injection

Views: 6,863

Posted By Dr J

Not a turbo but a twin screw supercharger here. I...

Not a turbo but a twin screw supercharger here. I tried WMI for a season and it was helpful, but I was not satisfied with it, in my case. A twin screw is different than a turbo in that it is always...

Forum: 911 / 930 Turbo & Super Charging Forum

11-10-2025, 06:05 AM

Replies: 3

Northeast cool mornings and Turbos WOW MPG?

Views: 314

Posted By Dr J

By the ideal gas law, for a given pressure...

By the ideal gas law, for a given pressure (atmospheric plus boost), the density * Temperature is a constant. So if temp decreases 10%, density increases 10%.

Temp here is relative to absolute...

Forum: Porsche 911 Technical Forum

08-13-2025, 05:00 AM

Replies: 21

couple more newbie 911 questions

Views: 946

Posted By Dr J

For that loose feeling, there are several...

For that loose feeling, there are several alternatives. One is a simple spring that a gentleman called Karsten developed (this is what I have right now)...

Forum: Porsche 911 Technical Forum

08-12-2025, 12:46 PM

Replies: 21

couple more newbie 911 questions

Views: 946

Posted By Dr J

On the rolling question, try to use an IR...

On the rolling question, try to use an IR thermometer after driving around a bit to see if you can identify an overly warm wheel. That would give an indication on which brake is dragging, if any.

Forum: Porsche 911 Technical Forum

07-03-2025, 05:53 AM

Replies: 23

Opinion on seat upgrade

Views: 956

Posted By Dr J

For street use, I agree with PeteKZ on not using...

For street use, I agree with PeteKZ on not using the fixed seat. They are uncomfortable to get in and out. If you use jeans, the little rivet by the pocket manages to dig through the bolster as you...

Forum: Porsche 911 Technical Forum

05-19-2025, 06:20 AM

Replies: 614

When Well Enough Can't Be Left Alone; Backdate, EFI/ITB, AC, and more!

Views: 69,855

Posted By Dr J

All right, all right, all right .:D Where did...

All right, all right, all right .:D Where did you find a circular screen that fits the clock position so perfectly? I did something similar with Nextion screens, but they are rectangular. The...

Forum: Porsche 911 Technical Forum

05-17-2025, 04:49 AM

Replies: 17

77 911S 2.7 – Backfiring in Exhaust

Views: 553

Posted By Dr J

Check that your spark plug wires are in the...

Check that your spark plug wires are in the correct position in the distributor.

Forum: 911 / 930 Turbo & Super Charging Forum

05-11-2025, 08:12 PM

Replies: 4

Supercharger parts

Views: 316

Posted By Dr J

it's a shame they couldn't help you out. Those...

it's a shame they couldn't help you out. Those year 911s respond very well to supercharging.

Supercharger parts are occasionally to rarely available in the for sale section of this website. Do a...

Forum: Porsche 911 Technical Forum

04-25-2025, 05:13 PM

Replies: 9

CSI to EFI, what's the best practices

Views: 752

Posted By Dr J

If you do go efi, I recommend: 1) a good...

If you do go efi, I recommend:

1) a good wiring harness
2) a tuner familiar with your chosen ECU to program it and
3) knock sensors

Might as well go COP rather than batch fire.

Forum: 911 / 930 Turbo & Super Charging Forum

04-25-2025, 05:01 PM

Replies: 5

3D Printable Camshaft Gear Alignment Tool for Porsche Aircooled Engines

Views: 847

Posted By Dr J

Beautiful. Got it. 1 pic = 1k words. Thanks

Beautiful. Got it. 1 pic = 1k words.

Thanks

Forum: 911 / 930 Turbo & Super Charging Forum

04-19-2025, 08:00 PM

Replies: 5

3D Printable Camshaft Gear Alignment Tool for Porsche Aircooled Engines

Views: 847

Posted By Dr J

Can you explain how to use it? Any pics using...

Can you explain how to use it? Any pics using it?

Thanks

Forum: Porsche 911 Technical Forum

04-18-2025, 10:35 AM

Replies: 34

Warm idle Lambda AFR

Views: 1,184

Posted By Dr J

I have an SC converted to EFI so I have played a...

I have an SC converted to EFI so I have played a lot with AFR in all conditions. I can tell you that these cars will not be happy idling that lean (15.7). I have mine set at 14 and it idles well at...

Forum: 911 Engine Rebuilding Forum

03-07-2025, 06:20 AM

Replies: 7

Engine camshaft condition opinion

Views: 699

Posted By Dr J

Based on Henry’s suggestion I did some research...

Based on Henry’s suggestion I did some research on PP about the 964 cam and ppl say you lose some mid range torque and gain hp on top. Is that your experience porschedude996?

Forum: 911 Engine Rebuilding Forum

02-28-2025, 07:31 AM

Replies: 7

Engine camshaft condition opinion

Views: 699

Posted By Dr J

Thank you gentlemen. Will do.

Thank you gentlemen. Will do.

Forum: 911 Engine Rebuilding Forum

02-27-2025, 04:08 PM

Replies: 7

Engine camshaft condition opinion

Views: 699

Posted By Dr J

Engine camshaft condition opinion

I have a camshaft for an SC with a small pitted area in one lobe. The other camshaft has no pitting. I am looking for suggestions about what to do about it before reinstalling.

Thanks
...

Forum: Porsche 911 Technical Forum

01-26-2025, 02:52 PM

Replies: 25

running a little lean, understanding O2 sensors

Views: 1,598

Posted By Dr J

Over 18 at idle is way too lean. The car will not...

Over 18 at idle is way too lean. The car will not be happy at all. If it seems to idle ok, I would not believe the gage. Something is fishy here.

Forum: 911 Engine Rebuilding Forum

01-25-2025, 03:57 PM

Replies: 3

dry ice blasting

Views: 431

Posted By Dr J

Try TuneRS in Coral Springs ...

Try TuneRS in Coral Springs

https://tunersmotorsports.com/restoration/cryodetail/

Forum: Porsche 911 Technical Forum

12-29-2024, 11:25 AM

Replies: 40

airconditioning condenser placement

Views: 1,678

Posted By Dr J

Because of my supercharger, I lost the ability to...

Because of my supercharger, I lost the ability to have a deck lid condenser. However, needing AC in Miami, I designed my own system. First a large underbelly tube and fin condenser which connected in...

Forum: Porsche 911 Technical Forum

12-16-2024, 03:03 PM

Replies: 34

414hp and 378ftlbs from my 2.7 turbo setup - At the wheels.

Views: 2,902

Posted By Dr J

http://forums.pelicanparts.com/support/smileys/cla...

http://forums.pelicanparts.com/support/smileys/clap.gifhttp://forums.pelicanparts.com/support/smileys/clap.gifhttp://forums.pelicanparts.com/support/smileys/clap.gif

Amazing!

Where did you...

Forum: Porsche 911 Technical Forum

11-30-2024, 03:26 PM

Replies: 9

Clewett Cam sensor install problem

Views: 595

Posted By Dr J

I drilled a hole and used a slide hammer. As you...

I drilled a hole and used a slide hammer. As you can see by the pics, the engine was in the car.

http://forums.pelicanparts.com/uploads26/IMG_37331733009097.jpg
...

Forum: 911 Engine Rebuilding Forum

11-12-2024, 03:45 PM

Replies: 2

Cylinder prep.

Views: 509

Posted By Dr J

Thanks for posting this. Will be helpful to all...

Thanks for posting this. Will be helpful to all doing rebuilds!

Forum: 911 / 930 Turbo & Super Charging Forum

10-16-2024, 05:15 AM

Replies: 69

Rebuilding a 3.0l SC as a turbo

Views: 7,007

Posted By Dr J

I would agree with Mike. Having the knock sensor...

I would agree with Mike. Having the knock sensor gives peace of mind and may allow you to tune a little more aggressively while protecting your engine. I did it on my EFI conversion and don’t regret...

Forum: Porsche 911 Technical Forum

10-09-2024, 06:33 AM

Replies: 5

123ignition ignition distributor (Tune+) - any experiences?

Views: 468

Posted By Dr J

While I have not used that particular product,...

While I have not used that particular product, being able to adjust the timing curve with respect to rpm and manifold pressure gives you the opportunity to maximize engine power. However, if you do...

Forum: Porsche 911 Technical Forum

10-09-2024, 06:16 AM

Replies: 22

Tire failure - near thing

Views: 1,106

Posted By Dr J

I had that happen as well on the Florida...

I had that happen as well on the Florida turnpike. Fortunately the car was very controllable, as in your case. It was the rear tire. In my case, I know exactly why it happened. My trip to work was...

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