[Gmecm] Crane Gold self-aligning rockers.

Fri Mar 25 15:11:20 UTC 2005

Hi Roger:  Sounds like a runner!

I don't know anything about Moates ECM852 software.  I use diacom.
Diacom shows 3 timing values.  Total Advance, advance vs reference and
spark retard.  These are all shown in degrees.  My Tech 1 only shows spark 
vs reference so
it's always less the 6 initial and after retard too.  If your software 
doesn't show all 3 that may
be a problem.

I have my deck set at 7 thousandths, with a .029 head gasket this gives me 
.035 deck height too.

Mark

----- Original Message ----- 
From: "Roger Danzy" <rdanzy at cox-internet.com>
To: <gmecm at diy-efi.org>
Sent: Friday, March 25, 2005 6:38 AM
Subject: Re: [Gmecm] Crane Gold self-aligning rockers.

> Mark,
>
> Excuse the blank return, clicked twice on reply button.
>
> I use the Moates ECM852 for datalogging and I never see any timing changes 
> under load.  I do see timing changes for highway mode where the timing can 
> be increased based on rpm, speed and load.  I have reduced the timing 
> below 2400 to increase driveability at low load, i.e. traffic.  I 
> originally was using the stock 700R4 and this was not a problem.  When I 
> switched to the T56 this became a problem
>
> I built the engine with zero deck height after reading an article as to 
> how this would allow higher compression without detonation, this has a lot 
> of merit.  The intake is a modified T-Ram.  All of the internal runners 
> have been removed, its like an lt1 manifold with longer runners, looks 
> very much like a Holley Stealth.  The runners are ported to the exact size 
> of the head ports (1 1/4 x 2) and the ports of the heads and manifold were 
> blended with the engine completely assembled.  Valve sizes are 2.02 and 
> 1.6.  The throttle body is a B&K 58 mm but I am using the original TPI maf 
> with a K&N mounted on  3 inch tubing very close to the MAF and I am using 
> the '89 Pontiac maf to throttle body connector.  My car is a '86 TA and 
> the original air duct was rather restrictive. In summary, my airflow is 
> most likely limited by the MAF.
>
> The exhaust is Edelbrock twin cat headers, with 2 2 1/4 cats going to an 
> Edelbrock 3 inch catback system.  Connections from the headers to the 
> catback is all 2 1/4 with a flowmaster 2 1/4 X 3 Y.
>
> I have taken it to 5800 rpm and it is still strong.  I don't want to go 
> any higher with the hydraulic roller cam is limited to 6000 per Lunati.  I 
> don't have a rev kit on the lifters as I have not found one for Lunati 
> lifters.
>
> I use tunercat for programming.
>
> Roger
>
> ----- Original Message ----- 
> From: "Mark Romans" <romans at starstream.net>
> To: <gmecm at diy-efi.org>
> Sent: Thursday, March 24, 2005 11:57 PM
> Subject: Re: [Gmecm] Crane Gold self-aligning rockers.
>
>
>>
>> Roger, have you diacomed it to see how much timing the ecm is pulling out 
>> at WOT and 32 deg total timing?
>> I had 11.1:1 compression ratio, L98 Heads LT4 Hot cam 1.6 GM Perf Parts 
>> Roller rockers, headers and superram and was never able to run
>> more than 23 deg at WOT and still picked up couple of degrees of retard 
>> once in a while.  I don't think the stock GM head
>> is that much better  (Combustion chamber design) that I would need 9 
>> degrees less timing.
>> IF you are running a stock tpi set up, it may be acting like a restrictor 
>> plate and so it doesn't get enough air/fuel to detonate.
>> How tight do you buzz it?
>> Mark
>> ----- Original Message ----- 
>> From: "Roger Danzy" <rdanzy at cox-internet.com>
>> To: <gmecm at diy-efi.org>
>> Sent: Thursday, March 24, 2005 7:21 PM
>> Subject: Re: [Gmecm] Crane Gold self-aligning rockers.
>>
>>
>>>I have a TPI 350.  The block is pre '79, Lunati hyd roller cam and kit 
>>>with Crane Gold roller rockers with guide plates, spring seat pressure 
>>>130, valve adjustment 0 plus 1 turn.  Compression ratio is 10.9, heads 
>>>are Edelbrock aluminum, gas is pump 93 octane.  Knock sensor is stock '86 
>>>TPI installed dry.  I run 32 total spark advance above 2400 rpm, ignition 
>>>is stock TPI 87 - 92 with an Accel Super coil.  I only get 8 to 10 knock 
>>>counts at startup and none while driving unless I really lug the engine 
>>>in the 1200 to 1600 rpm range in 5th or 6th gear.  I never hear any 
>>>knocks.
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "Osku Sneits" <ecm at asdf.org>
>>> To: <gmecm at diy-efi.org>
>>> Sent: Thursday, March 24, 2005 5:35 AM
>>> Subject: [Gmecm] Crane Gold self-aligning rockers.
>>>
>>>
>>>>
>>>>
>>>> There has been a whole lot of talk lately with the ECM's knock system 
>>>> and
>>>> Crane's rockers. I just wondered, if there's anyone else on this list,
>>>> that successfully runs these rockers without increasing the knock 
>>>> count,
>>>> besides me?
>>>>
>>>> ---
>>>>
>>>>
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>>
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