Reply With QuoteOK .... It's after 12 ....
Just wondering if it's as simple as aligning no1 piston TDC with the 'back' of the cam on no1 firing?
Or should I be retarding the timing slightly for more torque?
OK .... It's after 12 ....
slow day......
Yes ... you set the "piston 1" to TDC ... No to ... set to "visual" back of cam .. You have to set it up to marks on the gears to get it right ... as it is easy to be 1 tooth outOriginally Posted by up2nogood
Advance the Distributor to get more response from the motor
Which motor are you working on? .. Are you installing a new cam?
Mike
4.6 with 3.9 heads. 9.34:1 block. Will be using tin gaskets and running dedicated LPG.
.. So your using a brand new cam .... Durations set for LPG ?? (gas cam)
Mike
Hmm, hadn't thought of that. Was just going to use a Dynotec PC216.
Thoughts on this?
Swaggie
PC216 would be a great cam for gas, make sure it is dialed in though. You MAY have to retard it a few degrees, I have on the last 2 I have done BUT they weren't running gas and were Low comp 3.9's....
If in doubt set it to factory marks.
JC
The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
Master
With regard to camshaft timing, it was my understanding that if you advance the timing this will improve low end torque, as opposed to retarding the camshaft timing to after TDC as this will reduce low end torque.
Or am I missing something?
Ron.
RoverLord
no, your not missing anything, within limits individually both will increase low end torque.
Very Very Generally
retarding the cam a little can let the gasses flow better at low RPM BUT will hurt you at higher RPMs go too far and you can wind up with Ms. Valve Face introducing herself to MR Piston Crown and thats usually a marriage that ends in a disastrously costly divorce.
Generally with the rover engines as stock you only get to pick by a tooth mesh and not with any fancy cam adjusting gears and usually thats just way to much one way or another. If you were going to the effort of getting yourself set up with an adjusting cam gear you'd know enough to know that theres much better after market cams for rover engines than the stock ones and you'd fit one of them at the same time and to the specs provided with your new cam.
advancing the Timing puts the spark to the fuel air mix a bit earlier and raises the combustion pressure earlier putting more push on the top of the piston BUT.. When you start to hook in on the noise and the revs lift the advance then pushes you into the realms of pinging and this gets even worse when you lift off and have a decent manifold vac happening.
Dave
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