High Voltage hei coil and modules - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gambler150 · 01-09-2005, 11:25 PM

Will changing from a factory coil and module on a 355hp crate motor to a proformance coil and module make a big difference. Also wondering if it would require a hotter plug. I'm trying to squeeze out all the power I can without switching to MSD and external coil. Any help or suggestion welcome.

jhow66 · 01-10-2005, 12:32 AM

Redline on that engine is 5800 rpm so stock setup will work ok.

deadof_knight · 01-10-2005, 10:13 PM

To sum it up Ive used a accel super coil on three vehicles so far and the msd hei module improved starting is a first and to top it off it almost like having a 6al in a way .They seem all peppier from idle to 3000rpm so make your own call. I wouldnt have a stock hei setup after this .

70 nova 2 72 chevy trucks and all runnin accel super coil in cap and msd hei modules.

cableguy0 · 01-10-2005, 10:41 PM

yea the better coil and module will help stock stuff starts dropping spark right around 4500rpm and acts as a rev limiter. the hotter coil will do a more complete burn on the fuel resulting in better mileage and a better running engine and even more power

jhow66 · 01-11-2005, 12:04 AM

Got a stock setup on my 502HO (the one GM sells for it) and have no problems of running out of spark at any RPM. (5800 redline)

01-09-2005, 11:25 PM	#1
gambler150 Registered User Join Date: Mar 2004 Location: south carolina Posts: 4	High Voltage hei coil and modules Will changing from a factory coil and module on a 355hp crate motor to a proformance coil and module make a big difference. Also wondering if it would require a hotter plug. I'm trying to squeeze out all the power I can without switching to MSD and external coil. Any help or suggestion welcome.

01-10-2005, 12:32 AM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Redline on that engine is 5800 rpm so stock setup will work ok. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

01-10-2005, 10:13 PM	#3
deadof_knight FixerUpper Join Date: Dec 2000 Location: Lawton ,Oklahoma Posts: 102	To sum it up Ive used a accel super coil on three vehicles so far and the msd hei module improved starting is a first and to top it off it almost like having a 6al in a way .They seem all peppier from idle to 3000rpm so make your own call. I wouldnt have a stock hei setup after this . 70 nova 2 72 chevy trucks and all runnin accel super coil in cap and msd hei modules. __________________ 1-Cheyenne 72 700R4,camper special all original when i got it then i improved it a little Blue and White 3.73,4 core rad, 700r4,MSD hei ,turbo muffs dual exhaust only had 50 k on it when i bought original mile sweet old ladies truck turned into a stump puller No. 2 C-10 72 w/air and Tilt and power and the cheyenne trim package shtbd is dropped 2-3w/factory tilt has torq thrust 2 rims 2003 dodge neon steel blue color

01-10-2005, 10:41 PM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	yea the better coil and module will help stock stuff starts dropping spark right around 4500rpm and acts as a rev limiter. the hotter coil will do a more complete burn on the fuel resulting in better mileage and a better running engine and even more power __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

01-11-2005, 12:04 AM	#5
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Got a stock setup on my 502HO (the one GM sells for it) and have no problems of running out of spark at any RPM. (5800 redline) __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer



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