[Gmecm] Crane Gold self-aligning rockers.
romans at starstream.net
Fri Mar 25 09:11:20 CST 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.
----- 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.
> 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
> I use tunercat for programming.
> ----- 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?
>> ----- 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
>>> ----- 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
>>>> Crane's rockers. I just wondered, if there's anyone else on this list,
>>>> that successfully runs these rockers without increasing the knock
>>>> besides me?
>>>> Gmecm mailing list
>>>> Gmecm at diy-efi.org
>>> Gmecm mailing list
>>> Gmecm at diy-efi.org
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