Author Topic: Drilling lightning holes in the governor  (Read 9758 times)

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Offline good2win22

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Drilling lightning holes in the governor
« on: July 16 2016, 10:20:49 PM »
Has anyone personally done it? What were you results? Just read a thread on TB.com, guy drilled sixteen 1/8th inch holes and got 34.3 rpm per hole.
Jason

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Offline TexasT

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Re: Drilling lightning holes in the governor
« Reply #1 on: July 16 2016, 10:41:38 PM »
For the governor Dave recommended grinding the big weight to 35 grams , and the other to 17.5 grams

This is something I cut and copied off tb.com trans section. I haven't tried it as I'm not using the brf vb/gov combo.
I did buy a scale off amazon.com
https://www.amazon.com/gp/product/B0069QFDRO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

So I could put back the weight I took off if it didn't work like I wanted.
Rich

"Goals without actions are just dreams."

Offline Scoobum

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Re: Drilling lightning holes in the governor
« Reply #2 on: July 17 2016, 09:07:51 AM »
This is just my way of thinking...and I could be wrong. In a perfect world...you'd want it shifting where it makes it's peak HP...and the only way you'd know that...is on a dyno.
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Offline Steve Wood

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Re: Drilling lightning holes in the governor
« Reply #3 on: July 17 2016, 09:48:40 AM »
This is just my way of thinking...and I could be wrong. In a perfect world...you'd want it shifting where it makes it's peak HP...and the only way you'd know that...is on a dyno.

The old rule of thumb was 10% past the peak so when it shifted it was still near the top and rising again.  Given that we typically lose about 800 rpm on the shift, a better way would be to look at the dyno plot and set the the shift point so we straddle the peak hp point.

If no dyno read out is available, you can look at the mph curve and determine where it begins to flatten out and shift slightly before that point.

So, I agree with Brad
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Re: Drilling lightning holes in the governor
« Reply #4 on: July 17 2016, 10:32:27 AM »
I took a flyer with this cam that it would hit its peak HP at 5400. The governor in my trans has been adjusted to shift at...5500. It goes through the 1/8th mile traps at...5500.
Hard work pays off, dreams come true. Bad times don't last, but BAD GUYS do!

RIP Scott Hall AKA Razor Ramon

Offline Steve Wood

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Re: Drilling lightning holes in the governor
« Reply #5 on: July 17 2016, 10:40:33 AM »
Another thing that has a big influence is the converter.    Some converters will allow the rpm to jump to well over 5000 rpm almost immediately.  Looking at the mph curve will tell you if it is really transferring power to the tires or is it just slipping.

With a 212 cam, I figure it will still be making power at 5800 or so and I try to shift there because funny things can happen once you pass 6000 even if the car is still accelerating at that point.  Also, as the stress on the engine increases by a factor of four instead of linearly with the rpm increase, I don't see the need to try to make the engine do something it was not designed for.  Shifting a bit early in 1&2 and let it run out the back door seems wiser to me.
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Offline larrym

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Drilling lightning holes in the governor
« Reply #6 on: July 17 2016, 11:15:36 AM »
When I dialled in mine I grabbed a small weight from another governor used a digital scale and ground it down until it was 1/2 gram lighter including the set screw to pin the spring.
I might have an extra kicking around if you want it.   
86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline good2win22

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Re: Drilling lightning holes in the governor
« Reply #7 on: July 17 2016, 01:45:02 PM »
Here's a pic of the mph curve of that third run. Is there anyway to stretch out the graph to see of there is a spot where it seems to flatten out?  It looks to me to be pulling pretty consistently until the end of the run where it wanted to shift into 4th.
Jason

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Re: Drilling lightning holes in the governor
« Reply #8 on: July 17 2016, 01:50:40 PM »
A taller tire could cure that.
Rich

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Offline good2win22

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Re: Drilling lightning holes in the governor
« Reply #9 on: July 17 2016, 01:51:46 PM »
When I dialled in mine I grabbed a small weight from another governor used a digital scale and ground it down until it was 1/2 gram lighter including the set screw to pin the spring.
I might have an extra kicking around if you want it.
Thanks for the offer Larry. I'm thinking of drilling 1/8 inch holes. Right now it's shifting at 5200. 1 hole is supposed to equal 34.3 rpms.  I'm going to start with 8 holes. That would put it shifting at 5475ish. Going to weigh the governor before and after drilling and let you guys know. Pulled the drain plug this morning to drain the tranny fluid.
Jason

1966 Ford Ranch Wagon
1982 Jeep Wagoneer Limited
1986 Grand National BLK PHNX
1987 Turbo Regal Limited
2018 Ram 2500 Cummins

Offline good2win22

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Re: Drilling lightning holes in the governor
« Reply #10 on: July 17 2016, 01:54:45 PM »
Steve,  this cam is a 210/214. 
Jason

1966 Ford Ranch Wagon
1982 Jeep Wagoneer Limited
1986 Grand National BLK PHNX
1987 Turbo Regal Limited
2018 Ram 2500 Cummins

Offline good2win22

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Re: Drilling lightning holes in the governor
« Reply #11 on: July 17 2016, 01:55:58 PM »
A taller tire could cure that.
28x9's will be here Wednesday
Jason

1966 Ford Ranch Wagon
1982 Jeep Wagoneer Limited
1986 Grand National BLK PHNX
1987 Turbo Regal Limited
2018 Ram 2500 Cummins

Offline Steve Wood

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Re: Drilling lightning holes in the governor
« Reply #12 on: July 17 2016, 02:30:36 PM »
Steve,  this cam is a 210/214.

My 210/210 does not slow down until it hits 6200 and hits the rev limiter...but I have it set at 5800
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline good2win22

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Re: Drilling lightning holes in the governor
« Reply #13 on: July 17 2016, 11:09:19 PM »
For the governor Dave recommended grinding the big weight to 35 grams , and the other to 17.5 grams

This is something I cut and copied off tb.com trans section. I haven't tried it as I'm not using the brf vb/gov combo.
I did buy a scale off amazon.com
https://www.amazon.com/gp/product/B0069QFDRO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

So I could put back the weight I took off if it didn't work like I wanted.
Don't know how he got the little weight to 17.5.  Mine was at 15.49 right off the governor.  Maybe it had already been ground on.
« Last Edit: July 18 2016, 07:49:40 AM by good2win22 »
Jason

1966 Ford Ranch Wagon
1982 Jeep Wagoneer Limited
1986 Grand National BLK PHNX
1987 Turbo Regal Limited
2018 Ram 2500 Cummins

Offline larrym

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Drilling lightning holes in the governor
« Reply #14 on: July 18 2016, 12:37:16 AM »
I always thought they wee about 14.7 grams.
86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

 

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