[DeTomaso] Pinging.

[John Bentley (jab)]

It should say on the pump.  Does it say R+M/2 method?

JB

 

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]
On Behalf Of Kjetil Finne
Sent: Tuesday, August 08, 2006 10:59 PM
To: 'Michael Shortt'; detomaso at realbig.com
Subject: SV: [DeTomaso] Pinging.

Michael Shortt wrote:

What octane gas are you running in it, I always add 106 booster to
premium
gas in my car, I used regular once and it sounded like a Mexican hat
dance.


I run European grade 98 octane gas.
I don't know what that translates to in American octane numbers though?

Best Regards

Lisa and Kjetil
Norway


> ----- Original Message ----- 
> From: "Kjetil Finne" <kjetfinn at online.no>
> To: "'Detomaso Forum'" <detomaso at realbig.com>
> Sent: Tuesday, August 08, 2006 6:14 PM
> Subject: SV: [DeTomaso] Pinging.
>
>
>>
>> I have some problem with pinging in low rpm / wot situations
>> (1500-2500rpm).
>> If I want to pass a car on the highway, I would sometimes have to
gear
>> down to fourth gear to avoid pinging. Same thing happens when
>> accelerating in a high gear up long steep hills.
>> The timing is set at approximately 10dgr initial, and a 38total.
>> At 2000 rpm in a sit like this the timing wouldn't be more than
>> approximately 25degrees advanced.
>> It seems like the problem is caused by the carburettor not being
tuned
>> correctly, or can there be other causes to a problem like this?
>> When compression testing the engine earlier this year the readings
were:
>> 12.5kg (181 psi) pressure on all cylinders.
>>
>>
>> Intake: Edelbrock Performer.
>> Heads:            Closed chamber Aussie 2V heads .
>> Cam:              Compcam part nr # 32-221-3. Grind nr FC-268H-10
>> Pistons:          10:1 forged pistons. 0,30" over.
>> Ignition:         Mallory unilite.    Promaster coil
>> Carburettor:      Holley 670  Street avenger.
>>
>>
>>
>>
>>
>> Camshaft Specification Table
>> Part Number 32-221-3
>> Grind Number      FC 268H-10
>>
>> Description
>>
>> Gross Valve Lift  0.494       0.494
>> Duration At 0.006 Tappet Lift 268   268
>>
>> Valve Timing At 0.006
>>          Open  Close
>> Intake      28    60
>> Exhaust     68    20
>>
>> These Specs Are For The Cam Installed At 106 Intake CL
>>      Intake      Exhaust
>> Duration At 0.05 218   218
>> Lobe Lift   0.2853      0.2853
>> Lobe Separation   110
>>
>>
>>
>> Best Regards
>>
>> Lisa and Kjetil
>> Norway
>>
>>
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