LT5 Assembly Project - Page 30 - ZR-1 Net Registry Forums

XfireZ51 · 03-06-2011

Quote:

Originally Posted by Pete

Lee,does the alumiweld work?

Dom,no i won't have to kill everyone for this info just saying what i have done to my own intake, have not lost low end at least nothing that shows up on Dyno sheet or seat of the pants.

Pete

Pete,

Of course I was j/k. You have always been very generous with your acquired knowledge. You've certainly helped me out a lot.
Now if I could only get out from being under "double secret probation"

:s ign10:

LGAFF · 03-19-2011

Just ordered gaskets from Jerry's.....even bought the new head gaskets, I have an OEM pair, but will save them for a rainy day.

Waiting on cams......

I think once I get the order from Jerry, I will have everything.

April will probably be the build month

Polo-1 · 03-19-2011

did the pistons show up

LGAFF · 03-19-2011

yep, picked up the pistons today...I think the 368 will have to wait for the motor coming out of the 90, LA sleeve is behind on production.

LGAFF · 03-22-2011

Cams are done! Should get them later this week

LGAFF · 03-23-2011

Well got the balance of what I need to complete my build, I decided to use the new Head Gasket from Jerry's....comes complete with specs and instructions. Also bought the new style Cam bolts, with the torque spec from Jerry, setting the cams will be easy, vs the OEM process needed with other bolts.

Check out the Registry promotion on the outside of the package. Can't wait to get the build done.

LGAFF · 03-26-2011

CCd the heads today, Looks like they are right around the stock 40CC.....I used a piece of cheap plexiglass for Hobby Lobby, a platic syringe(like you use to give kids medicene) rubbing alcohol, and some Vaseline.

Put a plug in the head, coat of vaseline around the CC, and left a small gap to inject the alcohol.

No completely accurate, but the heads haave been worked on 2x so not sure what I have....I am not sure I can do the intake valve relief without losing some compression, although I am using Jerry's head gaskets.

XfireZ51 · 03-26-2011

Lee,

As I understand it, unshrouding the valves will necessitate milling the heads
to retain compression ratio.

Polo-1 · 03-26-2011

Quote:

Originally Posted by XfireZ51

Lee,

As I understand it, unshrouding the valves will necessitate milling the heads
to retain compression ratio.

Thats correct, This is what GVD did with mine. I think they picked up around 10-15cfm something like that. Then he milled back down to meet the 40cc.

A26B · 03-26-2011

How much was milled from the heads?

The new head gaskets compressed thickness is about 0.021" thinner. It won't alter the chamber volume, but will effectively accomplish the net change to C/R, as milling up to 0.020".

03-19-2011	#292
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project Just ordered gaskets from Jerry's.....even bought the new head gaskets, I have an OEM pair, but will save them for a rainy day. Waiting on cams...... I think once I get the order from Jerry, I will have everything. April will probably be the build month __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-19-2011	#293
Polo-1 Join Date: Sep 2005 Location: Washington Posts: 955	Re: LT5 Assembly Project did the pistons show up

03-19-2011	#294
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project yep, picked up the pistons today...I think the 368 will have to wait for the motor coming out of the 90, LA sleeve is behind on production. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-22-2011	#295
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project Cams are done! Should get them later this week __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-23-2011	#296
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project Well got the balance of what I need to complete my build, I decided to use the new Head Gasket from Jerry's....comes complete with specs and instructions. Also bought the new style Cam bolts, with the torque spec from Jerry, setting the cams will be easy, vs the OEM process needed with other bolts. Check out the Registry promotion on the outside of the package. Can't wait to get the build done. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-26-2011	#297
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project CCd the heads today, Looks like they are right around the stock 40CC.....I used a piece of cheap plexiglass for Hobby Lobby, a platic syringe(like you use to give kids medicene) rubbing alcohol, and some Vaseline. Put a plug in the head, coat of vaseline around the CC, and left a small gap to inject the alcohol. No completely accurate, but the heads haave been worked on 2x so not sure what I have....I am not sure I can do the intake valve relief without losing some compression, although I am using Jerry's head gaskets. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 03-26-2011 at 04:50 PM.

03-26-2011	#298
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: LT5 Assembly Project Lee, As I understand it, unshrouding the valves will necessitate milling the heads to retain compression ratio.

03-26-2011	#300
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: LT5 Assembly Project How much was milled from the heads? The new head gaskets compressed thickness is about 0.021" thinner. It won't alter the chamber volume, but will effectively accomplish the net change to C/R, as milling up to 0.020". __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.