Roger H Posted March 28, 2014 Share Posted March 28, 2014 Hi all, I rally a vauxhall chevette single cam with a Manta b back axle with a steel torque tube.Now i'm looking to go and have a go in the forests with the old girl.What crown wheel and pinions are available for that axle,we thought a 3.9 would be a good balance for it,is this ratio available for this axle.Any help would be much appreciated Thank you. Quote Link to comment Share on other sites More sharing options...
Autocrosser Posted March 28, 2014 Share Posted March 28, 2014 Have a look at reisse motorsport in Germany they sell new cw+ pinion sets http://www.risse-motorsport.de/index.php/cat/c574_Rear-axle-and-accessories.html Quote Link to comment Share on other sites More sharing options...
doveyte2800 Posted March 29, 2014 Share Posted March 29, 2014 hi, The 3.89 - 1 ratio was standard fitting to the 1.6 Rallye A series and should fit the B axle, I believe their is no difference in the crownwheels between A and B, someone will correct me if I'm wrong. A 3.89 will give you an approx top speed of 105mph @ 6000rpm in 4th ( top ) A 4.22 will give u approx 95 mph @ 6000. Either of these work but you need to match them to your gearbox ratios . low 1st gear with a 4.22 is pretty useless, works with a close ratio box with a 2.86 first gear. Acceleration is the key factor, top speed is how brave you are! Hope this helps Quote Link to comment Share on other sites More sharing options...
Roger H Posted March 29, 2014 Author Share Posted March 29, 2014 Thanks very much Guys great help.Is the 4.22 / 3.89 CWP's hard to come by or are they readily available. Quote Link to comment Share on other sites More sharing options...
doveyte2800 Posted March 29, 2014 Share Posted March 29, 2014 i think the answer to that one is YES, they are hard to find secondhand. The 4.22 is from the Kadett GTE so not that many around. Going back to your gearbox ratios, if u use a 3.68 ratio ( standard fitting to Ascona and Manta A 1.6 ) your top speed will increase to 111mph but acceleration will be slightly slower. if u know ur gear ratios u can work out speeds in each gear. Quote Link to comment Share on other sites More sharing options...
Roger H Posted March 29, 2014 Author Share Posted March 29, 2014 I am using the Chevette hs Getrag box.Ratio's 3.37,2.16,1.58,1.24,1.0 Quote Link to comment Share on other sites More sharing options...
doveyte2800 Posted March 29, 2014 Share Posted March 29, 2014 (edited) ok, Using the 3.68 u would get 3000 6000 3.37 16.5mph 33mph 2.16 26 51 1.58 35 70 1.24 45 90 1.1 55 111 3.89 or 4.22 ratios would be correspondingly lower in speed Edited March 29, 2014 by doveyte2800 Quote Link to comment Share on other sites More sharing options...
Roger H Posted April 6, 2014 Author Share Posted April 6, 2014 Thanks very much for that,What does the manta gte and the 1.8 use,i may have chance of a gte axle. Quote Link to comment Share on other sites More sharing options...
mantasrme Posted April 6, 2014 Share Posted April 6, 2014 The 1.8 has a 3.67 ratio the Gt/e is 3.44 Quote Link to comment Share on other sites More sharing options...
Roger H Posted April 6, 2014 Author Share Posted April 6, 2014 The 1.8 has a 3.67 ratio the Gt/e is 3.44 Thanks for that,I'll keep looking Quote Link to comment Share on other sites More sharing options...
Roger H Posted April 30, 2014 Author Share Posted April 30, 2014 Hi everyone advice needed please, right i have been offered 4.11 CWP, but will this fit into my Manta B axle,But i am not sure what it is out of Ascona,Kadett maybe? Quote Link to comment Share on other sites More sharing options...
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