bret90 Posted December 25, 2011 Report Share Posted December 25, 2011 What dictates height? Bottom of oilpan even with bottom of crossmember? Right now it is even, but its raised 2". Link to comment Share on other sites More sharing options...
4cylfordz Posted December 25, 2011 Report Share Posted December 25, 2011 what class? what motor? what chassis? Link to comment Share on other sites More sharing options...
txtom Posted December 25, 2011 Report Share Posted December 25, 2011 Most I remember measure center of the crankshaft to the ground. Link to comment Share on other sites More sharing options...
bret90 Posted December 25, 2011 Author Report Share Posted December 25, 2011 Class: SLM crate series Motor: 604 Chassis: new style Port City Anderson Elite (4.5" rh big spring with 5" crossmember height). This is a new build and there are no other cars to look at nearby. The rules say 10" crank height but with the pan flush with the bottom of the xmember it is at 12". Car is designed for decent travel. Machined Sweet rack etc Is a low travel tour type chassis better when using a big wetsump pan? Thanks for the replies Link to comment Share on other sites More sharing options...
poorboy Posted December 26, 2011 Report Share Posted December 26, 2011 You should call Port City and do as they say. They will give you the correct answer. Link to comment Share on other sites More sharing options...
ups88john Posted December 26, 2011 Report Share Posted December 26, 2011 not a new build(yours might be new but there are several of those cars out there) but i would think you would rather drag the cross member rather than the oil pan. unless your not gonna travel it much keep it flush or a quarter inch higher just in case. Link to comment Share on other sites More sharing options...
bret90 Posted December 26, 2011 Author Report Share Posted December 26, 2011 thanks for the help. So i guess these wetsumps just sit up high? My teammates motor is a drysump. His motor sits at 10". My rules say 10" also, but im at 12" And we have the same chassis. The rackbolts hit at 3.5" shock travel. My rules say 10" crank height. My question is: should I go for travel with motor at 12" or set my motor lower and limit travel? Link to comment Share on other sites More sharing options...
jwmbishop Posted December 28, 2011 Report Share Posted December 28, 2011 thanks for the help. So i guess these wetsumps just sit up high? My teammates motor is a drysump. His motor sits at 10". My rules say 10" also, but im at 12" And we have the same chassis. The rackbolts hit at 3.5" shock travel. My rules say 10" crank height. My question is: should I go for travel with motor at 12" or set my motor lower and limit travel? That two inches is the biggest reason for the added hassle of dry sump. My opinion is to not limit travel - hitting bump stops will make it suddenly push like a field plow and kinda hard to predict the ragged edge (add in a lil bump from the rear and what you thought was an entry right on that edge suddenly sends you straight to the wall) - stiffening spring to limit will add push that now must be compensated for in geometry AND weight dist... The higher CG can usually be compensated for in geometry alone. Link to comment Share on other sites More sharing options...
bret90 Posted January 31, 2012 Author Report Share Posted January 31, 2012 Thanks for the replies! I decided on a 11.5" crank height, about a 1/2 below the crossmember. We'll see how it works. after doing a little chassis r and , looks like if the mc starts around 6.4 to the right everything should be ok. Link to comment Share on other sites More sharing options...
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