Racepak for stick cars

Has anyone put this sensor in a Gforce G-101 4 speed? Is there a good way of doing it?

[Dave Casey]

Mark, what racepak unit do you use?, and does anyone know if the correction can be put into the sportsman and the v300 ?

Thanks,Dave

[Dave Casey]

Monty, by having the engine rpm and the input rpm, you see a true graph in every gear, all the time, another words you see proportionally how much the clutch is slipping. The driveshaft rpm increases continually and it is harder to see the true slipage. Comp and prostock cars have it easy putting the sensor right on the input because mainly they have more room to get the sensor in the bellhousing astheir bellhousings are much deeper than ours and have a different input setup.

All that being said, I am no expert on this data stuff as I don't have any in my cars yet, I just have an understanding of it some what.

Dave

[Mark Madison]

Dave, I use a RacePak SC1000 with the latest upgrades, not a v300 but good enough. You can try Right clicking the clutch icon and the "scaled buffer channel parameters" window will appear. To adjust for the countershaft ratio adjust raw data value "B" . for your M/D ratio.

[Dallas Kelly]

A top and bottom loader Jerico modified for Racepak sensor by re-machining the cast-in fill plug boss.

[Damn Yankee]

Originally Posted by Dallas Kelly

A top and bottom loader Jerico modified for Racepak sensor by re-machining the cast-in fill plug boss.

Dallas, did you machine this yourself (magnet collar on the shaft) or did you farm it out to someone else ? We are class rule restricted to T5's and Tremec's and I am want to mount a sensor for the input shaft data logging on our G Force T5. Because of the transmission design and no one making a sealed tapered bearing, G Force prefers not to help us with this project

[Dallas Kelly]

Originally Posted by Damn Yankee

Dallas, did you machine this yourself (magnet collar on the shaft) or did you farm it out to someone else ? We are class rule restricted to T5's and Tremec's and I am want to mount a sensor for the input shaft data logging on our G Force T5. Because of the transmission design and no one making a sealed tapered bearing, G Force prefers not to help us with this project

"Damn Yankee" sorry to take so long to answer.
No, I did not do the machine work myself. Chuck Buckshorn, friend, excellent machinist and long-time racer, actually made all the pieces. During the layout process, we discovered that the fill plug boss lined up, laterally, with where we needed to be on the cluster. The case was externally milled to adjust the angular alignment to the countershaft center line. I bought a length of, I believe, 1" aluminum hex rod that was machined into a combination fill plug/sensor adapter with o-ring seals. The split ring is very straight forward since there just is not sufficient clearance to allow very much variation of dimensions. I sold both of the modified Jerico transmissions without verifying that the design would work. However, the Jericos were replaced with Libertys, also modified by Chuck and they work with the standard Racepak clutch sensor and a single magnet in the countershaft split ring.

[GEORGE PETERSON]

Originally Posted by Todd Hoven

Has anyone put this sensor in a Gforce G-101 4 speed? Is there a good way of doing it?

Todd,

G-Force can supply a bearing retainer fitted with a bung that will accept the sensor. They can also supply the necessary sealed input bearing.

George Peterson
D/S 4448

[Jim Hawkins]

I have a input sensor on my jerico in my ss/i car that is exactly like the one Mark built for his. I did alot of research and no one makes a kit to do this, including jerico. There is no way we could see to mount it to read directly off the input shaft. My machinest made a slip collar with a magnet that installs on the cluster. We drilled and tapped a 1/2 hole in the case and used a 1/2 bolt with the center machined and tapped to accept the sensor. My trans. is a older bottom loader and was easy to set up with that bottom cover removed. I use a computech system and it will convert the main drive ratio to 1:1. I have a new jerico trans. that was just finished last week and they installed the collar and drilled the case for me. The new trans. does not have the bottom cover so need to install sensor and collar as the trans was being built. This has worked well and have seen a few others done the same way.

[Damn Yankee]

Jim, we were looking at our T5 case and most likely will have to mount the sensor to where it will read off of the cluster shaft as well. We are using a Racepak Sportsman box and will have to see if it will convert to the main shaft speed as well.