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MSD Digital GM High Energy Modules with Rev Limiters 83647

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$99.97

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Ignition Control Module, Heat Digital HEI Module, With Rev limiter, Each

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7 Customer Reviews for MSD Ignition 83647 - MSD Digital GM High Energy Modules with Rev Limiters

Average Customer Review

5 Star

(4)

4 Star

(1)

3 Star

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2 Star

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Results 1 - 7 of 7

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MSD Digital GM High Energy Modules with Rev Limit

Summit RacingSummit Racing Verified Purchase

Cool product. Was not sure if this would work but it is flawless so far. Have not run engine enough to determine durability but so far so good. I bought a Summit billet distributor (HEI) then replaced the module with this one. This was my way of getting the features and quality I wanted on the cheap in the form of mix and match. It's worked great so far. The details of operation are good but I still do not know how many times I can revise the rev limiter. I figured this is a good way to use it as Valet switch to protect the car from the tire shop if I'm not there. Don't let the appearance sway you away. Seeing the solder points and wiring and make some feel uneasy but it's a good product. I may do it again on my other car. ...read more

2 of 2 found this review helpful.

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Reviewer: GUY from MI

Date: March 17, 2014

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MSD HEI

Summit RacingSummit Racing Verified Purchase

I am impressed with the performance of this ignition module. The rev limiter works well every time it is hit and is easy to set. I like the rev limit verification feature also. I wish the limiter was a little softer like my MSD 7 series box but for the price you cant beat it.

1 of 1 found this review helpful.

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Reviewer: WALKER from NC

Date: May 27, 2014

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Ignition module for E Street FI by Edelbrock

Summit RacingSummit Racing Verified Purchase

By recommendation of Edelbrock techs I installed this to provide a clean tach signal for my E Street fuel injection. It did not work any better than the stock HEI module.. At 4000rpm the injection dies and the engine does not rev over 4k. I went back to Mallory ignition and carb works great, 6000rpm plus. Moral of the story, for street use it probably works but for feeding tach signal to an E Street fuel injection system it doesn't. ...read more

1 of 1 found this review helpful.

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Reviewer: CHADWICK from CA

Date: May 22, 2014

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Worked as expected

Summit RacingSummit Racing Verified Purchase

I purchased this in the hopes that at idle or under 2000 rpm it would burn fuel efficient. Since putting in the 4 pin I have noticed the fuel smells have gone and now getting on it while cruising the rev limiter works as expected and easy to setup and change. I am happy with the product. The jury is still out but have noticed the economy seems to have increased now with ac on my 67 chevelle with a 454 bigblock the idle doesn't drop random and it holds nice and stable. Before the stock 4 pin the idle would random drop from 900 rpm to 400 and sometime the motor would stall. No longer having this issue since the upgrade and thought I would report since I read reviews before purchase. ...read more

1 of 1 found this review helpful.

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Reviewer: CHARLES from TX

Date: May 19, 2014

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MSD HEAT HEI module

Summit RacingSummit Racing Verified Purchase

Its a good product, install was easy and perform good as expected.

1 of 1 found this review helpful.

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Reviewer: JAYA from Indonesia

Date: March 19, 2014

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Fast and easy upgrade

Summit RacingSummit Racing Verified Purchase

I just installed an Edelbrock e-street fuel injection system in my corvette. I ran into several problems as this new fuel injection system requires a strong tach signal to activate the injectors. I didn't want to replace the distributor as it also has a mechanical tach drive and finding one is difficult and never cheap. This MSD high energy module was just what I needed to upgrade my HEI and get the tach signal the EFI required. One day shipping from Summit Racing followed by a 10 minute installation and I’m up and running again. THANKS MSD and Summit ! ! ! ...read more

0 of 0 found this review helpful.

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Reviewer: JOHN from NJ

Date: August 12, 2014

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MSD Product was defective.

Summit RacingSummit Racing Verified Purchase

MSD module was defective and their (MSD) Tech help was useless, only gave a return RMA number to send it back for exchange. Not sure when to expect to have returned back to get car running. Unlikely to purchase MSD product again.

0 of 0 found this review helpful.

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Reviewer: GARRY from WI

Date: July 07, 2014

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  • 1

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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