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Re: Cam break in is done!....Now more questions!
[Re: JohnRR]
#1493044
10/09/13 09:48 PM
10/09/13 09:48 PM
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Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
Then replace the pistons with a zero deck dish piston to lower your compression and gain quench 
I know that these threads of mine are probably annoying to many of you. They have been a fantastic learning tool for me though and I hope they helped others.
I am to the point where the next time I feel the need to pull this engine, I will most certainly replace the pistons and zero deck the block. I wish I had better advice in 2004 when I built this engine. Over the years I have read a lot and I've listened a lot. My next build will surely have fewer problems.
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Interesting point about unshrouding. I talked with my machinist today. He agreed that there is power to be found there, but that the Edelbrock heads are less shrouded than stock iron heads, so the gains may be less there. The 2" TTI header gasket has huge ports that show that big gains may be found by gasket matching the exhaust ports. The intake ports are pretty clean so I'm not sure just how much they can be hogged out.
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Re: Cam break in is done!....Now more questions!
[Re: Dodgem]
#1493046
11/20/13 10:35 PM
11/20/13 10:35 PM
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Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
Just thinking unshouding can open the CC's up a bit as well as flow to help lower compression.
A think gasket and a bigger bore size at that will help a lot!
I just got back from the machine shop and expect to get the heads back tomorrow. Pictures will follow. They look great. The man was finishing up with a fresh valve job and new stem seals. They measured at 83 ccs.
I did the math on the compression calculator and I will end up at 9.77 with an .086 head gasket and 10.0 even with the .075 gasket.
Over the weekend I cleaned the tops of the pistons and found that they were actually .012 in the hole instead of the .017 number that I wrote before. I think the machinist may have resurfaced the decks when I had the block in for honing in 2011.
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Re: Cam break in is done!....Now more questions!
[Re: Twostick]
#1493056
12/11/13 03:23 AM
12/11/13 03:23 AM
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Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
Just an FYI my 493 has zero deck with IIRC 34cc dish. 8.9something:1. Basically makes 500hp and 600 ft/lbs with a .509 cam and it is quite happy to do it with 87 regular on all but the hottest of days.
Kevin
This is really tempting. When the time comes to pull this engine, I am going with this route.
This has been a really long road. I pulled the heads on October 6th. Its been over 2 months. I ordered the Cometic head gaskets over 2 weeks ago. The just arrived yesterday. I've been itching to get back to the car but just as I have all the stuff, I get busy with other things! Life often gets in the way of having fun,
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Re: Cam break in is done!....Now more questions!
[Re: RapidRobert]
#1493060
12/12/13 03:48 AM
12/12/13 03:48 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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Quote:
Alright & if it's good on 89 you might even be able to switch cams if desired. Holler how it turns out. After 5K plus views we're all pulling for ya on this aggravating deal 
for me it's like a car wreck ...
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Re: Cam break in is done!....Now more questions!
[Re: JohnRR]
#1493062
12/13/13 01:29 AM
12/13/13 01:29 AM
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Joined: Feb 2005
Posts: 4,311
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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Quote:
Quote:
Alright & if it's good on 89 you might even be able to switch cams if desired. Holler how it turns out. After 5K plus views we're all pulling for ya on this aggravating deal
for me it's like a groundhog day car wreck ...
Fixed.
It is apart. The problem can be easily fixed right now with a 88 to 90 cc chamber and 0.027" gasket. The right head porter would have done it for nothing. 
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Re: Cam break in is done!....Now more questions!
[Re: JohnRR]
#1493063
12/13/13 01:31 AM
12/13/13 01:31 AM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
master
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master
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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Quote:
Quote:
Alright & if it's good on 89 you might even be able to switch cams if desired. Holler how it turns out. After 5K plus views we're all pulling for ya on this aggravating deal
for me it's like a car wreck ...
I'd consider it a train wreck but wtf do I know.LOL it will be intertaining whatever the outcome.
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