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Showing results 1 to 25 of 500
Search took 0.14 seconds. Search: Posts Made By: Lapkritis
Forum: Porsche 911 Technical Forum 12-17-2024, 02:19 PM
Replies: 22
Views: 3,927
Posted By Lapkritis
Using the cast iron cylinders requires an...

Using the cast iron cylinders requires an experienced machinist to set proper piston clearance. It's challenging as the parts heat up as you're working with them, which changes the dimensions. Looks...
Forum: 911 Engine Rebuilding Forum 07-25-2020, 08:57 PM
Replies: 13
Views: 1,638
Posted By Lapkritis
If you have to cut them then you can use base...

If you have to cut them then you can use base gaskets to add it back. Host sells.

Sent from my SM-T580 using Tapatalk
Forum: 911 Engine Rebuilding Forum 12-29-2019, 07:22 PM
Replies: 19
Views: 2,274
Posted By Lapkritis
Try holding the 1/8" with a wooden wedge/shim...

Try holding the 1/8" with a wooden wedge/shim before moving on.

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 09-23-2019, 03:31 PM
Replies: 32
Views: 4,236
Posted By Lapkritis
What alloy family? Sent from my SM-N960U...

What alloy family?

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 09-10-2019, 06:41 PM
Replies: 28
Views: 6,102
Posted By Lapkritis
There is a sensitivity setting for aftermarket...

There is a sensitivity setting for aftermarket knock systems. The oem tests for thousands upon thousands of hours to fine tune their knock systems with respect to gain on the signal and to tune out...
Forum: 911 Engine Rebuilding Forum 09-09-2019, 05:59 PM
Replies: 28
Views: 6,102
Posted By Lapkritis
I'm so with you in my hatred of carbs... I've...

I'm so with you in my hatred of carbs... I've tuned and cleaned so many... I'm done. Like a retired butcher. I never want to see the inside of one again.

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 09-09-2019, 01:55 PM
Replies: 28
Views: 6,102
Posted By Lapkritis
Various methods - check spark plugs often, read...

Various methods - check spark plugs often, read them. I usually pull plugs for inspection while changing my oil... good task while waiting for everything to drain.

Watch AFR and EGT. There are...
Forum: 911 Engine Rebuilding Forum 09-09-2019, 08:35 AM
Replies: 28
Views: 6,102
Posted By Lapkritis
I haven't done it in that configuration but I...

I haven't done it in that configuration but I wouldn't bother. A competent Dyno operator/tuner should be skilled enough to safely tune and set up the engine without knock control. Add timing until...
Forum: 911 Engine Rebuilding Forum 08-08-2019, 08:48 AM
Replies: 14
Views: 2,486
Posted By Lapkritis
Plastigauge Sent from my SM-T580 using...

Plastigauge

Sent from my SM-T580 using Tapatalk
Forum: 911 Engine Rebuilding Forum 06-20-2019, 04:07 PM
Replies: 15
Views: 2,707
Posted By Lapkritis
Feels tight... I would check how many ft/lbs are...

Feels tight... I would check how many ft/lbs are required to turn it by the flywheel to quantify just exactly how tight. Pull your plugs out and get that ft/lbs value too.


CCA battery...
Forum: 911 Engine Rebuilding Forum 06-18-2019, 07:44 PM
Replies: 46
Views: 2,495
Posted By Lapkritis
Happy to have helped! Sent from my SM-N960U...

Happy to have helped!

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 05-24-2019, 12:32 PM
Replies: 46
Views: 2,495
Posted By Lapkritis
Fuel flowing yet? Sent from my SM-N960U...

Fuel flowing yet?

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 05-20-2019, 03:10 PM
Replies: 10
Views: 1,982
Posted By Lapkritis
Doesn't need to be parallel perfection there IMO....

Doesn't need to be parallel perfection there IMO. Make sure you're setting gap at the tightest point and do your best at being parallel. I use a cutoff wheel in my vice to cut my rings and then...
Forum: 911 Engine Rebuilding Forum 05-14-2019, 06:29 PM
Replies: 46
Views: 2,495
Posted By Lapkritis
Round up to 1.3 cups per minute. Rough math puts...

Round up to 1.3 cups per minute. Rough math puts the pump performance then at 78 cups per hour.

78/16 cups in a gallon is 4.8gph. That's a problem...

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 05-14-2019, 03:55 PM
Replies: 46
Views: 2,495
Posted By Lapkritis
I believe aftermarket suppliers such as PMO call...

I believe aftermarket suppliers such as PMO call for higher pressure than 4lbs for track use.

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Forum: 911 Engine Rebuilding Forum 05-10-2019, 08:31 AM
Replies: 46
Views: 2,495
Posted By Lapkritis
Heat related makes me think it could be a tired...

Heat related makes me think it could be a tired fuel pump. Output drops as the fuel pump heats up. Mix in a corner or heavy breaking and a bowl that isn't filling fast enough...

Sent from my...
Forum: 911 Engine Rebuilding Forum 05-10-2019, 04:36 AM
Replies: 46
Views: 2,495
Posted By Lapkritis
Fuel pump/base pressure adjustment shouldn't be...

Fuel pump/base pressure adjustment shouldn't be forgotten. A higher flow rate pump designed for low operating pressure may also help.

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 05-01-2019, 07:07 AM
Replies: 13
Views: 1,405
Posted By Lapkritis
Typical for hardware provided when purchasing a...

Typical for hardware provided when purchasing a bargain basement, clone turbo manifold from offshore outfit... Those are usually tossed out anyway and replaced. Here... I dunno. Looks like loose...
Forum: 911 Engine Rebuilding Forum 04-03-2019, 04:16 PM
Replies: 25
Views: 2,398
Posted By Lapkritis
Brake clean and wd40 alternating and sometimes...

Brake clean and wd40 alternating and sometimes mixing with a scuff pad works well. I would blast and mirror polish or ceramic coat the domes personally. Builder's choice.

Sent from my SM-N960U...
Forum: 911 Engine Rebuilding Forum 03-30-2019, 07:11 AM
Replies: 25
Views: 2,398
Posted By Lapkritis
In situation, same approach with the dowel and a...

In situation, same approach with the dowel and a towel/moving blanket in case the piston tries to escape.

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 03-30-2019, 07:08 AM
Replies: 25
Views: 2,398
Posted By Lapkritis
Have to ask- are you sure the pin clips are out? ...

Have to ask- are you sure the pin clips are out? If I have a tough one I'll hold the rod in a vice(wood contacts) and drive the pin with a perfectly sized dowel. They normally aren't too tight but...
Forum: 911 Engine Rebuilding Forum 03-14-2019, 10:24 AM
Replies: 6
Views: 898
Posted By Lapkritis
Heat heads and freeze guides. Sent from my...

Heat heads and freeze guides.

Sent from my SM-N960U using Tapatalk
Forum: Porsche 911 Technical Forum 03-01-2019, 08:08 AM
Replies: 12
Views: 761
Posted By Lapkritis
With ignition sorted I would move to mixture. ...

With ignition sorted I would move to mixture. Laser thermometer each exhaust port/pipe when the issue is present to narrow down which cylinder is offending. Check the plug, verify with color tune. ...
Forum: Porsche 356 Technical Forum 03-01-2019, 08:02 AM
Replies: 23
Views: 2,713
Posted By Lapkritis
Artwork. Sent from my SM-N960U using Tapatalk

Artwork.

Sent from my SM-N960U using Tapatalk
Forum: 911 Engine Rebuilding Forum 03-01-2019, 07:23 AM
Replies: 22
Views: 1,971
Posted By Lapkritis
If you wrap anything up then make sure it's air...

If you wrap anything up then make sure it's air tight otherwise you'll risk making it worse by trapping condensation. Drop a few bags of desiccant inside on engine under the plastic before wrapping....
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