Heading into the home stretch!! - ZR-1 Net Registry Forums

Paul Workman · 06-20-2010

It seems like "forever" since Lee and I pulled my hurt LT5 from the engine bay. The car will have been on jacks for 10 months, come June 30th.

Started out with what turned out to be a "melted" valve; according to the skilled eye of the machinist grinding the valves and seats.

Well, as long as the heads were off anyway, might as well port them, right? And, with a shining example (Pete's heads) to go by, might as well push the limit, huh? But, as Mark Haibeck once told me, "85% of the risk is in the last 15% of the porting!" How very true, it turns out. Welding a booboo on these heads takes a very skilled welder with the right equipment and rods. I feel I learned a great deal about porting these heads, but if I had it to do over, I'd think hard about just having them CNC'd by Pete's guy and be done with it.

However, it hasn't been all frustration. In the end I was able to incorporate nuance nuggets from Marc Haibeck's approach as well as Pete's on both the porting, the bowels, and relieving.

Anywayz...The last bit was to seal up a pin-hole in a weld in the lifter side of the runner. (Held 21" of Hg for over 15 minutes and never lost a bit!) Now both heads are sporting a very nice multi-angled valve job, been relieved, and milled. Time to put it back together!!

Some pix "along the way"...

It shouldn't be long now!

P.

LGAFF · 06-20-2010

OK, WTH is up with waiting until the hottest part of the year again, my wife must have a deal with you to try and collect on my life ins.

Aurora40 · 06-20-2010

Nice! I can't wait to hear how she runs!

Paul Workman · 06-20-2010

Quote:

Originally Posted by LGAFF

OK, WTH is up with waiting until the hottest part of the year again, my wife must have a deal with you to try and collect on my life ins.

Twazunt mah choice neither, ol' buddy!! (But, we had to optimize our chances on collecting from the insurance!

)

Haven't checked the long range forecast, but it will be July before she roars, and it doesn't look like snow is in the forecast either!!

p.

bobbyhi · 06-20-2010

A lot of hard work and a good job Paul=D>

rhipsher · 06-20-2010

I hope it fires up and runs good without a hitch. I know its been a while on jack stands. I wasn't afraid to do my own top end porting but if I want to have the heads done then I'm just going to take it to LPE and pay the 29k and have them turn it into a 415 storker. zero miles on the od. brand new 564 rwhp with a warrantie for 2 years or 24k miles. for me that warrantie makes all the difference in the world and puts my mind at ease. I plan to take it to LPE within the next three years.

06-20-2010	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Heading into the home stretch!! It seems like "forever" since Lee and I pulled my hurt LT5 from the engine bay. The car will have been on jacks for 10 months, come June 30th. Started out with what turned out to be a "melted" valve; according to the skilled eye of the machinist grinding the valves and seats. Well, as long as the heads were off anyway, might as well port them, right? And, with a shining example (Pete's heads) to go by, might as well push the limit, huh? But, as Mark Haibeck once told me, "85% of the risk is in the last 15% of the porting!" How very true, it turns out. Welding a booboo on these heads takes a very skilled welder with the right equipment and rods. I feel I learned a great deal about porting these heads, but if I had it to do over, I'd think hard about just having them CNC'd by Pete's guy and be done with it. However, it hasn't been all frustration. In the end I was able to incorporate nuance nuggets from Marc Haibeck's approach as well as Pete's on both the porting, the bowels, and relieving. Anywayz...The last bit was to seal up a pin-hole in a weld in the lifter side of the runner. (Held 21" of Hg for over 15 minutes and never lost a bit!) Now both heads are sporting a very nice multi-angled valve job, been relieved, and milled. Time to put it back together!! Some pix "along the way"... It shouldn't be long now! P. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 06-20-2010 at 12:22 AM.

06-20-2010	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Heading into the home stretch!! OK, WTH is up with waiting until the hottest part of the year again, my wife must have a deal with you to try and collect on my life ins. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-20-2010	#3
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Heading into the home stretch!! Nice! I can't wait to hear how she runs! __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

06-20-2010	#5
bobbyhi Join Date: Jul 2005 Location: Mendota Heights, MN. 55120 Posts: 984	Re: Heading into the home stretch!! A lot of hard work and a good job Paul=D> __________________ Bob Anderson 1990 #2405 White/Gray Haibeck chip,4:09 gears,Power Effects Exhaust,5 spoke chrome,C5 brakes,49th Street rockers,K&N,Hurst,Headers,Upper & lower ported Minnesota State Director Founding Member #19

06-20-2010	#6
rhipsher Join Date: Aug 2008 Location: Houston 90 Red ZR-1 Posts: 2,320	Re: Heading into the home stretch!! I hope it fires up and runs good without a hitch. I know its been a while on jack stands. I wasn't afraid to do my own top end porting but if I want to have the heads done then I'm just going to take it to LPE and pay the 29k and have them turn it into a 415 storker. zero miles on the od. brand new 564 rwhp with a warrantie for 2 years or 24k miles. for me that warrantie makes all the difference in the world and puts my mind at ease. I plan to take it to LPE within the next three years.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode