Drag Racing Discussions > Front Engine Dragsters

Pinion height.

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dreracecar:
There is always an exception, and if you are running a Dana, and have the tools and knowlage to change out a Dana R&P in the car and in the pits---Cheers to you--- but most of us find that changing the center faster and eaiser to do with minimal amount tools and stripping the car down. Moving the motor back towards the rear end does more for angle than raising the pinion up .500

hemidakota:
Thanks was just interested in opnions on a dana. Have a dana housing and thought about using it over a 9". It is indeed heavy.

retroboy:

--- Quote from: George on January 15, 2015, 03:43:57 AM ---I found the Mopar 742 setup to be strong enough for my injected combo but the blower power with a trans brake and well prepped track took it beyond its limits. The only Pro gear set currently available is the 4.86. We removed the Mopar unit a couple months ago in favor of the Ford. The entire 8 3/4 is for sale brake to brake. It is listed in the for sale section with details. George

--- End quote ---

Thanks George sound great but I'm just thinking a head at the moment.
Cheers

George:

--- Quote from: retroboy on January 15, 2015, 04:35:28 PM ---
--- Quote from: George on January 15, 2015, 03:43:57 AM ---I found the Mopar 742 setup to be strong enough for my injected combo but the blower power with a trans brake and well prepped track took it beyond its limits. The only Pro gear set currently available is the 4.86. We removed the Mopar unit a couple months ago in favor of the Ford. The entire 8 3/4 is for sale brake to brake. It is listed in the for sale section with details. George

--- End quote ---

Thanks George sound great but I'm just thinking a head at the moment.
Cheers

--- End quote ---
Cheers to you too! I thought I would throw a comment out there on the Mopar 8.75. It served us well for a time. George

Roger:
Thought I’d throw in one more option for a raised pinion position. Winters make a non-quick change that mounts the pinion centerline directly in line with the ring gear centerline. Whole thing is like ‘32-’48 Ford rear with a center banjo and side bells. My dragster has one of these units in it and it appears to have worked for the last 10 years in a junior fuel car. With its spiral bevel ring and pinion, it's more efficient, uses less power to operate, and runs cooler compared to a typical hypoid rear-end. The centerline of a 12 bolt is 1 ½” lower and the centerline of a 9” is 2 Ό” lower than the non-quick change. Down side, it’s more time consuming to change the gear ratio. You must split apart the rear-end to make a gear change. Went 7.40s @ 180mph on the left coast, first race out for me last October ran 8.40s @162 with a mild tune-up. Have pictures but are to large to post here, sorry.

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