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Fixture to flow LT5 head out there?

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Old 03-10-2010, 11:11 PM
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cv67
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Default Fixture to flow LT5 head out there?

About to start tearing down a 5k mile LT5 I sold to the guy that bought my Z last yr. Will have a full P&P, externally polished, going to grind the cams etc.

I have never seen a flow sheet on these and may have to make a fixture if I cant find one.

I do want to fully document this before and after to see what the gains truly are at all levels.

Anyone?
Old 03-11-2010, 09:18 AM
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scholtmj
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Check with Polo-1 or tpepmeie on the ZR-1 registry. They had cylinder heads on a flow bench recently.
Old 03-11-2010, 10:15 AM
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cv67
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Thanks not great with the search over there, posted up in tech.
Old 03-11-2010, 01:17 PM
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I heard that the inside of that engine was hollow
Old 03-11-2010, 02:05 PM
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cv67
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Say it aint so Frankie
Old 03-11-2010, 06:25 PM
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cv67
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Sent them both pms
Old 03-11-2010, 08:03 PM
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pm'ed you from the other site.

hollow short block?




Old 03-11-2010, 08:19 PM
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cv67
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Got it polo thanks.
Old 03-12-2010, 09:07 PM
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cv67
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Well its set in stone, my car goes out to the body shop next week so in its place will be the motor getting torn down.

Thanks to those who have pmed/offered help.

Its a little irritating that so many are tight lipped about this stuff to be honest. Ill post it up anyway someone has to....its been done a thousand times anyway.
Old 03-14-2010, 07:40 AM
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SAM/CH ZR-1
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Is it possible to see some flow numbers?

Sam
Old 03-14-2010, 12:51 PM
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cv67
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I bet few if any even have them...just a hunch
Old 03-15-2010, 11:35 PM
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Originally Posted by cuisinartvette
I bet few if any even have them...just a hunch
Mine flowed 331-338 before we started reworking them. Should know in a week or so where they end up.
Old 03-16-2010, 12:35 AM
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..................
Old 03-16-2010, 12:29 PM
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Originally Posted by wdo-mkr
Mine flowed 331-338 before we started reworking them. Should know in a week or so where they end up.
Was that a completely stock head?
Old 03-16-2010, 12:43 PM
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tpepmeie
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Originally Posted by thethrillofspeed
Was that a completely stock head?
uh... no those were not stock.

Paul, I can't remember did your heads start as LPE 415 heads? Big valves?

Todd
Old 03-16-2010, 10:04 PM
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Originally Posted by tpepmeie
uh... no those were not stock.

Paul, I can't remember did your heads start as LPE 415 heads? Big valves?
Todd
Not LPE heads. Someone else did the work previously. No secondaries, large valves, etc. Pretty much every trick in the book this time around.
Old 03-16-2010, 10:09 PM
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Originally Posted by Polo-1
pm'ed you from the other site.

hollow short block?
Very nice. It looks like you have the ron woods arp head studs to go with the killer pistons. What did you use for the coating?

What did your heads end up flowing kevin?

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To Fixture to flow LT5 head out there?

Old 03-17-2010, 09:22 PM
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What number at what lift, intake, exhaust, etc. Looking for an actual sheet that lists .100 up through .500 or something to that effect.
Anyone?
Old 03-17-2010, 09:46 PM
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glass slipper
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Originally Posted by cuisinartvette
What number at what lift, intake, exhaust, etc. Looking for an actual sheet that lists .100 up through .500 or something to that effect.
Anyone?
For 4-valve heads, the .050" lift numbers are relevant. Hopefully, somebody can post up a flow data sheet as I'm curious also. It'd be even better if this thread turned into more than a few pages.
Old 03-17-2010, 10:05 PM
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Originally Posted by wdo-mkr
Very nice. It looks like you have the ron woods arp head studs to go with the killer pistons. What did you use for the coating?

What did your heads end up flowing kevin?
Yes, RW's liners and studs.

On the JE Piston's, it's their Thermal Barrier on top and Tuff Skirt on the side's


My heads had a budget... stock valves and guides. I shot my $$$ on the bottom end to hold up to N20 shot. I ended up were you are restarting from @ .450 lift


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