New diz, lost torque - The 1947 - Present Chevrolet & GMC Truck Message Board Network

norske · 11-25-2009, 12:58 PM

Put a rebulit HEI in my 305 and lost some torque. I'm assuming it's timing (what else?). The block and heads were shaved, block zero decked, erson cam (stage or two below a stump), eldebrock 2101 intake, Roch. Qjet, headers. I didn't check the timing before the diz went out (stupid!) so don't know where it was set. Put it at 10 degrees BTDC and it was better, but not quite there. Before I do too much testing, thought I'd ask you guys if you knew a ballpark figure for this setup. Thanks in advance.

djracer · 11-25-2009, 03:47 PM

I usually run as much as possible without pinging.

turp mcspray · 11-25-2009, 03:50 PM

It may have a slower advance curve than your other one did. Do a search on timing, or timing weights and springs. You will find lots of info on how to dial in your timing.

KQQL IT · 11-25-2009, 09:48 PM

If its a msd they come with a lazy timing curve all in by 4k or something weird like that. my 406 likes 14 initial 36 total all in at 2500rpm

11-25-2009, 12:58 PM	#1
norske Registered User Join Date: Dec 2008 Location: Austin, MN Posts: 117	New diz, lost torque Put a rebulit HEI in my 305 and lost some torque. I'm assuming it's timing (what else?). The block and heads were shaved, block zero decked, erson cam (stage or two below a stump), eldebrock 2101 intake, Roch. Qjet, headers. I didn't check the timing before the diz went out (stupid!) so don't know where it was set. Put it at 10 degrees BTDC and it was better, but not quite there. Before I do too much testing, thought I'd ask you guys if you knew a ballpark figure for this setup. Thanks in advance.

11-25-2009, 03:47 PM	#2
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: New diz, lost torque I usually run as much as possible without pinging. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

11-25-2009, 03:50 PM	#3
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: New diz, lost torque It may have a slower advance curve than your other one did. Do a search on timing, or timing weights and springs. You will find lots of info on how to dial in your timing. __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

11-25-2009, 09:48 PM	#4
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,256	Re: New diz, lost torque If its a msd they come with a lazy timing curve all in by 4k or something weird like that. my 406 likes 14 initial 36 total all in at 2500rpm __________________ " That didnt make it any newer " " Dont antique the equipment "

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