Rob Futcher Posted January 22, 2022 Report Share Posted January 22, 2022 Does anyone have a steering rack laying around and who would be willing to take a measurement for me? I’m tying to get the length of the rack from the middle of the inner ball joints. TIA Rob Quote Link to post Share on other sites
Drewmotty Posted January 23, 2022 Report Share Posted January 23, 2022 (edited) I can’t remember what the dimension is but it’s only a few mm different to the optimum dimension for a TR3 rack conversion. I guess that’s why you’re asking? The optimum is the same as the width between the centres of the front wishbone pivots ie 445.5mm Edited January 23, 2022 by Drewmotty Quote Link to post Share on other sites
jerrytr5 Posted January 24, 2022 Report Share Posted January 24, 2022 Mine is still on the car so having to feel through the gaiter for the inner ball joint and can only be approximate. Fixing centres 355mm. Fixing to inner balljoint 120mm. Inner to outer balljoints 320mm. So I think the measurement you need between inner balljoints is very approximately 595mm. Jerry Quote Link to post Share on other sites
Howard722 Posted January 25, 2022 Report Share Posted January 25, 2022 My old rack is still in the shed. I make the dimension 535/540mm by feeling through the rubber boots. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 25, 2022 Report Share Posted January 25, 2022 (edited) On 1/23/2022 at 8:09 AM, Drewmotty said: I can’t remember what the dimension is but it’s only a few mm different to the optimum dimension for a TR3 rack conversion. I guess that’s why you’re asking? The optimum is the same as the width between the centres of the front wishbone pivots ie 445.5mm the need for rack length and position is important. Costain and Phipps said the centre of the inner ball joint of the rack had to lie on an imaginary line drawn between the top and bottom inner fulcrums of the wishbones. Ackerman angle is also important for the outer track rod end position. For sidescreen cars Revington has addressed this with bent steering levers…..that actually work as described. this is helpful. https://www.lincolntech.edu/news/hot-rod-garage/eliminate-bump-steer-lincoln-tech-tip Edited January 25, 2022 by BlueTR3A-5EKT Quote Link to post Share on other sites
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