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11-15-2010
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#241 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: LT5 Assembly Project
Just an FYI, i bought a full set lifters off ebay(only paid $32)....HT-2236 Sealed Power....machine shop advised they will not work with heads.....checked cross reference today and it shows this is an LT-5 lifter....
Will post pics tonight. Lee
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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11-15-2010
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#242 |
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Join Date: Oct 2008
Location: tampa
Posts: 537
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Re: LT5 Assembly Project
The HT-2236 require shims, they are shorter than the stock GM ones, although they can "fit" they don't.
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11-15-2010
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#243 |
 
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,667
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Re: LT5 Assembly Project
When you say shorter,how much shorter.
Pete
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'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 |
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11-15-2010
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#244 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: LT5 Assembly Project
Actually the stockers are shorter.....will post pics
Stock on left:   -stock on left shorter
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 11-15-2010 at 08:54 PM. |
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11-15-2010
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#245 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: LT5 Assembly Project
Brought the heads home today:
Reshaped IH bolt boss....  Primary is 35MM at entry(which is actually .5" into the head, drops to 34.5 1/2 way through, 34MM into the bowl Secondary is 36MM at top narrows to 34MM into bowl.  
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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11-16-2010
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#246 | |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 812
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Re: LT5 Assembly Project
Quote:
Weigh them up... you'll find the oem piece around 75g, and the INA one considerably less, depending on which design. |
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11-16-2010
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#247 |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,646
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Re: LT5 Assembly Project
Todd
Will your lightweight lifters work with stock valves? |
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11-16-2010
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#248 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 812
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Re: LT5 Assembly Project
Probably not, unless you do a valve job and sink the valves, or use shims (lash caps) on the tips.
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11-16-2010
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#249 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: LT5 Assembly Project
Those are the lifters that were in the heads, and also the only ones that worked with the valves....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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11-17-2010
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#250 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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Re: LT5 Assembly Project
Quote:
 I'd be tempted to open it up at the bottom, just a tad, which can be done w/o significant danger of punching through. (I'd tell ya, but Marc would have to kill me!  ) How some ever, proof is in the pudding/dyno/trap time, as it were. Question: Did you have to have the IH's built up as well? I assume so, if the IHs were port matched to the "before" heads. Or, did you just buy the heads with intention of using some other IHs? Are the IHs siamesed as well? It will be interesting to see the results! Is there another 500+ hp FBI Z in the making?  P. Last edited by Paul Workman; 11-17-2010 at 05:03 AM. |
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