427 LT5 Build 2 underway - Page 5 - ZR-1 Net Registry Forums

tpepmeie · 08-14-2016

yes, it was Dom.

ALZR1 · 08-14-2016

Quote:

Originally Posted by tpepmeie

In case you guys want to follow along. The rotating assembly is together. My blog is updated with the latest steps. This will be the last update for awhile, as I need to get the cylinder heads ready and the cams timed.

http://pepmeierenginedevelopment.blogspot.com/

I like the Gas ports on the Pistons Todd

WARP TEN · 08-15-2016

OK Al, I'll bite: What are gas ports on the pistons? Those tiny little holes around the perimeters? And what exactly is their purpose? Inquiring minds want to know....-Bob

-=Jeff=- · 08-15-2016

Quote:

Originally Posted by WARP TEN

OK Al, I'll bite: What are gas ports on the pistons? Those tiny little holes around the perimeters? And what exactly is their purpose? Inquiring minds want to know....-Bob

Yes Bob.. I stumbled across this:

Quote:

a gas port is a hole drilled from the piston deck (a vertical gas port) or from the top ring land (a horizontal gas port) to the rear of the top ring groove. The purpose of a gas port is to apply combustion pressure directly to the top ring, forcing the ring face firmly against the cylinder wall. The number, size, and location of gas ports vary with bore diameter, engine type, dome design, and the engine builder’s personal preferences.

Here is a link:
http://rehermorrison.com/tech-talk-2...-of-gas-ports/

WARP TEN · 08-16-2016

Quote:

Originally Posted by -=Jeff=-

Yes Bob.. I stumbled across this:

Here is a link:
http://rehermorrison.com/tech-talk-2...-of-gas-ports/

Ahhh....thanks Jeff. I am enlightened! And the article itself was quite interesting. Right at the end it said: "When you cross the threshold of 1,000 horsepower, gas ports become essential for maximum performance." Certainly glad that Todd won't be held back any! --Bob

Jagdpanzer · 08-16-2016

Looking good Todd.
The new rod bolts appear to have larger heads.
Did the block require further clearancing from before?

tpepmeie · 08-16-2016

Quote:

Originally Posted by Jagdpanzer

Looking good Todd.
The new rod bolts appear to have larger heads.
Did the block require further clearancing from before?

No. A bit of an optical illusion. The shoulder is a little fatter, but the overall height is the same as the prior bolts. No clearancing required.

Pete · 08-16-2016

Todd did you buy sleeves from AES?

Pete

tpepmeie · 08-18-2016

Quote:

Originally Posted by Pete

Todd did you buy sleeves from AES?

Pete

No.

Jagdpanzer · 08-19-2016

Quote:

Originally Posted by tpepmeie

No. A bit of an optical illusion. The shoulder is a little fatter, but the overall height is the same as the prior bolts. No clearancing required.

2" rods journals then?

08-14-2016	#41
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 775	Re: 427 LT5 Build 2 underway yes, it was Dom. __________________ Todd ____________________________________ [SIGPIC][/SIGPIC] [email]pepmeierengines@yahoo.com[/email] [URL="http://toddpepmeier.wix.com/pepmeierengines"]visit our website[/URL] [URL="http://pepmeierenginedevelopment.blogspot.com/"]Blog[/URL] Friend us on Facebook too: [url="https://www.facebook.com/profile.php?id=100011443683384"] Pepmeier Engine Development[/url]

08-15-2016	#43
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,035	Re: 427 LT5 Build 2 underway OK Al, I'll bite: What are gas ports on the pistons? Those tiny little holes around the perimeters? And what exactly is their purpose? Inquiring minds want to know....-Bob __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"

08-16-2016	#46
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,644	Re: 427 LT5 Build 2 underway Looking good Todd. The new rod bolts appear to have larger heads. Did the block require further clearancing from before? __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

08-16-2016	#48
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,680	Re: 427 LT5 Build 2 underway Todd did you buy sleeves from AES? Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage