[Gmecm] Crane Gold self-aligning rockers.

[Roger Danzy]

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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