Summit or Jegs Dizzy's for 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Paso76GMCstepper · 06-10-2006, 02:23 PM

Hey I havent been here in ages. I just got the truck on the road and have a question.

Has anyone bought one of the "blueprinted" dizzys from Jegs or Summit. I need one I think for my 76 GMC K15. They are like 90 bucks. What do you guys think about them, any better options. Its not Hi performance so I dont need anything crazy.

Let me know guys.

Thanks again for all your help

Slonaker · 06-10-2006, 05:44 PM

I considered both of them for my new engine, but decided against them. I ended up getting the cheap Mallory HEI from Summit since it was a brand name and it said it was made in the USA. I asked a similar question here, and really didn't find anyone who had been running either of them long enough to know how they hold up.

Right after I bought mine, MSD came out with one for about $150. I don't recall seeing it shortly after it was released, so I don't know if it is still available.

I will probably get one of those store branded ones you are asking about for my '37 Chevy, though, since it doesn't see that many miles. I'm interested to hear people's opinions of them.

Slonaker

Paso76GMCstepper · 06-10-2006, 06:08 PM

Well thanks for the info. I dont drive thios truck daily either but do go on some long trips to the mountains and stuff. I will be curious if anyone actually has one of these. Maybe then we will both know more.

Thanks for the reply

Its nice to be back here

79BIG10 · 06-10-2006, 07:44 PM

If they're anything like Pro-Forms then I'd stay away. I had one and it went out on me in a couple months time. I've been really happy with the one that came with my ZZ4. It's the GM HEI one that has been reputable for some time. You can add a new module to make it somewhat better but I've tweaked mine to where it has a adance limit etc. and really surpised me on how it became better.

BigDan3131 · 06-11-2006, 04:24 AM

Get a Mallory Unilite they dont need a sparkbox just a matching coil. Setup is real easy and they work great. My bro has one in his Olds that spins to 6500rpm without issue and the other was in my old work truck that fully loaded had 14,000 pounds on it never hiccuped once.

Paso76GMCstepper · 06-11-2006, 01:32 PM

Thanks for all the replies they are very helpfull. Since we are on the subject the reason I think I need a new one is my timing was set at 10 and slowly creeps its way up to 17 BTDC. The mechanic that did my smog is really good doesnt try to get you to buy anuthing you dont need. He said it looked like the dizzy. Do u guys have any ideas. It starts perfect runs great doesnt pop but has no top end power, which is due to the way advanced timing. He said my vaccuum advance may not be working. He said chasnge it out. He didnt try to push me to have him do it. Even gave me the Napa part # for the replacement.

Any comments would be greatly appreciated

MylilBowTie · 06-11-2006, 02:30 PM

Have you checked to see if the Harmonic balancer has slipped?

79BIG10 · 06-11-2006, 07:02 PM

Also what about the timing chain?

06-10-2006, 02:23 PM	#1
Paso76GMCstepper Registered User Join Date: Jan 2004 Location: Paso Robles, CA Posts: 347	Summit or Jegs Dizzy's for 350 Hey I havent been here in ages. I just got the truck on the road and have a question. Has anyone bought one of the "blueprinted" dizzys from Jegs or Summit. I need one I think for my 76 GMC K15. They are like 90 bucks. What do you guys think about them, any better options. Its not Hi performance so I dont need anything crazy. Let me know guys. Thanks again for all your help __________________ Tony "Life is a Team Sport" To the memory of the Hendrick Motorsports Plane Crash Victims Last edited by Paso76GMCstepper; 06-10-2006 at 02:24 PM.

06-10-2006, 05:44 PM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: Summit or Jegs Dizzy's for 350 I considered both of them for my new engine, but decided against them. I ended up getting the cheap Mallory HEI from Summit since it was a brand name and it said it was made in the USA. I asked a similar question here, and really didn't find anyone who had been running either of them long enough to know how they hold up. Right after I bought mine, MSD came out with one for about $150. I don't recall seeing it shortly after it was released, so I don't know if it is still available. I will probably get one of those store branded ones you are asking about for my '37 Chevy, though, since it doesn't see that many miles. I'm interested to hear people's opinions of them. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

06-10-2006, 06:08 PM	#3
Paso76GMCstepper Registered User Join Date: Jan 2004 Location: Paso Robles, CA Posts: 347	Re: Summit or Jegs Dizzy's for 350 Well thanks for the info. I dont drive thios truck daily either but do go on some long trips to the mountains and stuff. I will be curious if anyone actually has one of these. Maybe then we will both know more. Thanks for the reply Its nice to be back here __________________ Tony "Life is a Team Sport" To the memory of the Hendrick Motorsports Plane Crash Victims

06-10-2006, 07:44 PM	#4
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: Summit or Jegs Dizzy's for 350 If they're anything like Pro-Forms then I'd stay away. I had one and it went out on me in a couple months time. I've been really happy with the one that came with my ZZ4. It's the GM HEI one that has been reputable for some time. You can add a new module to make it somewhat better but I've tweaked mine to where it has a adance limit etc. and really surpised me on how it became better. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

06-11-2006, 04:24 AM	#5
BigDan3131 Registered User Join Date: Jun 2006 Location: Maple Valley, WA Posts: 1,913	Re: Summit or Jegs Dizzy's for 350 Get a Mallory Unilite they dont need a sparkbox just a matching coil. Setup is real easy and they work great. My bro has one in his Olds that spins to 6500rpm without issue and the other was in my old work truck that fully loaded had 14,000 pounds on it never hiccuped once.

06-11-2006, 01:32 PM	#6
Paso76GMCstepper Registered User Join Date: Jan 2004 Location: Paso Robles, CA Posts: 347	Re: Summit or Jegs Dizzy's for 350 LONG WINDED Thanks for all the replies they are very helpfull. Since we are on the subject the reason I think I need a new one is my timing was set at 10 and slowly creeps its way up to 17 BTDC. The mechanic that did my smog is really good doesnt try to get you to buy anuthing you dont need. He said it looked like the dizzy. Do u guys have any ideas. It starts perfect runs great doesnt pop but has no top end power, which is due to the way advanced timing. He said my vaccuum advance may not be working. He said chasnge it out. He didnt try to push me to have him do it. Even gave me the Napa part # for the replacement. Any comments would be greatly appreciated __________________ Tony "Life is a Team Sport" To the memory of the Hendrick Motorsports Plane Crash Victims

06-11-2006, 02:30 PM	#7
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: Summit or Jegs Dizzy's for 350 Have you checked to see if the Harmonic balancer has slipped? __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

06-11-2006, 07:02 PM	#8
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: Summit or Jegs Dizzy's for 350 Also what about the timing chain? __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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