427 LT5 Build 2 underway - Page 3 - ZR-1 Net Registry Forums

5ABI VT · 05-22-2015

Very cool

Silly idea but thought I'd mention it anyways

I was thinking to run a pcv hose from the rear all the way back to the tire tray and put a big reservoir of some sort like a fuel cell where the spare tire goes to increase the volume in the system. All I did for now is run a vacuum line all the way to the front of the car ahead of the wheel where I put a catch can hoping to increase volume slightly and catch some oil.

tpepmeie · 05-23-2015

Quote:

Originally Posted by Jagdpanzer

How much did you gain?

35-40 cfm throughout the lift curve. I'll post more detail when the heads arrive next week. And the flow efficiency, which was great beforehand, was maintained. Doesn't appear to be any adverse shrouding with the bigger valves. Still >90 cfm/sq in at .500".

tpepmeie · 05-26-2015

Look what showed up today. Without a doubt, I would say it is impossible to fit any larger intake valves in the LT5. New Beryllium Copper valve seats. 41.5mm intake valves, 35.5mm exhaust valves.

376 cfm @ .500"
390 @ .600

PhillipsLT5 · 05-26-2015

WOW!

efnfast · 05-26-2015

Quote:

Originally Posted by PhillipsLT5

WOW!

Yeah, that's what I was thinking.
What is the stock size?

LGAFF · 05-26-2015

My Todd, what big valves you have....

XfireZ51 · 05-26-2015

Todd,

Absolutely stunning! The copper beryllium seats are gorgeous.

Hib Halverson · 05-27-2015

Those seats are pretty, for sure but wow, the larger valves really "slimmed down" the valve bridges. At the 800-hp level do you have any concerns about keeping those parts of the head cool?

Of course, I guess duty cycle is an issue, too. If all this engine will be is a drag racer then maybe there's no problem

But if you're going to do long periods of WOT, i.e.: standing mile events, things are going to get pretty darn hot....

RyanChappel · 05-29-2015

What an impressive build. I live over in Boone County, near Zionsville. Is the engine being assembled in Fishers? If so, I'd love to be around when that jewel is fired for the first time....

It is always exciting to hear the sound a new engine makes when it first comes to life... I used to work around IndyCar for a few years, through the Chevy Indy v8's, the Buicks, the Aurora (a monster of an engine), the Infinity v8, and of course Toyota and Honda....etc.,

It gets in the blood, for sure.

tpepmeie · 02-24-2016

Guys,
Just a quick post to let you know that from January, I've started a business focused on the LT5. I intend to have a blog dedicated to build 2. If things go as planned, I'll have more to display at BG this year.

Hope you can click over to the website, and contact me if you have any questions.

PS. I did ask the mods if this was ok, and never got a response. Apologies in advance if this violates any forum rules.

Thanks.

05-22-2015	#21
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 780	Re: 427 LT5 Build 2 underway Very cool Silly idea but thought I'd mention it anyways I was thinking to run a pcv hose from the rear all the way back to the tire tray and put a big reservoir of some sort like a fuel cell where the spare tire goes to increase the volume in the system. All I did for now is run a vacuum line all the way to the front of the car ahead of the wheel where I put a catch can hoping to increase volume slightly and catch some oil.

05-26-2015	#23
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 812	Re: 427 LT5 Build 2 underway Look what showed up today. Without a doubt, I would say it is impossible to fit any larger intake valves in the LT5. New Beryllium Copper valve seats. 41.5mm intake valves, 35.5mm exhaust valves. 376 cfm @ .500" 390 @ .600

05-26-2015	#24
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,446	Re: 427 LT5 Build 2 underway WOW!

05-26-2015	#26
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: 427 LT5 Build 2 underway My Todd, what big valves you have.... __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-26-2015	#27
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,683	Re: 427 LT5 Build 2 underway Todd, Absolutely stunning! The copper beryllium seats are gorgeous.

05-27-2015	#28
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 897	Re: 427 LT5 Build 2 underway Those seats are pretty, for sure but wow, the larger valves really "slimmed down" the valve bridges. At the 800-hp level do you have any concerns about keeping those parts of the head cool? Of course, I guess duty cycle is an issue, too. If all this engine will be is a drag racer then maybe there's no problem But if you're going to do long periods of WOT, i.e.: standing mile events, things are going to get pretty darn hot.... __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878

05-29-2015	#29
RyanChappel Join Date: Aug 2012 Location: Boone County, Indiana Posts: 132	Re: 427 LT5 Build 2 underway What an impressive build. I live over in Boone County, near Zionsville. Is the engine being assembled in Fishers? If so, I'd love to be around when that jewel is fired for the first time.... It is always exciting to hear the sound a new engine makes when it first comes to life... I used to work around IndyCar for a few years, through the Chevy Indy v8's, the Buicks, the Aurora (a monster of an engine), the Infinity v8, and of course Toyota and Honda....etc., It gets in the blood, for sure.

02-24-2016	#30
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 812	Re: 427 LT5 Build 2 underway Guys, Just a quick post to let you know that from January, I've started a business focused on the LT5. I intend to have a blog dedicated to build 2. If things go as planned, I'll have more to display at BG this year. Hope you can click over to the website, and contact me if you have any questions. PS. I did ask the mods if this was ok, and never got a response. Apologies in advance if this violates any forum rules. Thanks.