4stroker Posted September 25, 2007 Report Posted September 25, 2007 a friend of mine has a 7mil trex motor ported by rossier engineering. it has 39mm pwms and trinity stage 4 pipes, vortex ignition what do you all think it would rev to? Quote
RoostRocket Posted September 25, 2007 Report Posted September 25, 2007 (edited) it depends on your pipes i believe... :shrug: that is how the rpm's are controlled anyways. Edited September 25, 2007 by RoostRocket Quote
dajogejr Posted September 25, 2007 Report Posted September 25, 2007 I'd ask Rossier...they could tell you. Porting, pipes, compression, intakes, timing....all play a role on how high it'll rev... But remember, doesn't do any good to rev to 11K if the power falls off at 9... Dyno baby...the only way to go. Quote
4stroker Posted September 25, 2007 Author Report Posted September 25, 2007 im just trying to work out what top speed he might be able to pull i thought that with the longer stroke, and bigger/heavier pistons, that it might not be physcially able to rev as high as say a drag ported 350cc banshee, but he would obviously have alot more power/torque to pull much taller gearing... would you agree? Quote
91banshee Posted September 25, 2007 Report Posted September 25, 2007 I'd ask Rossier...they could tell you.Porting, pipes, compression, intakes, timing....all play a role on how high it'll rev... But remember, doesn't do any good to rev to 11K if the power falls off at 9... Dyno baby...the only way to go. thats about right , i had a 7 mil t rex 72 bore and it fell off quick pretty much a dog compared to a cub imo my cub i had pulled hard all the way and never quit with shearer pipes . Quote
dajogejr Posted September 25, 2007 Report Posted September 25, 2007 im just trying to work out what top speed he might be able to pull i thought that with the longer stroke, and bigger/heavier pistons, that it might not be physcially able to rev as high as say a drag ported 350cc banshee, but he would obviously have alot more power/torque to pull much taller gearing... would you agree? It's probably a trade off....to be honest. Not revving as high will probably cancel out bigger gearing... Unless that TRex has EXTENSIVE porting done by someone who knows what they're doing....it's not going to make the power a cleaned up cub will.... I know rossier makes great 4 stroke products. I'm unaware of their 2 stroke capability.... Quote
shee rips Posted September 25, 2007 Report Posted September 25, 2007 a friend of mine has a 7mil trex motor ported by rossier engineering. it has 39mm pwms and trinity stage 4 pipes, vortex ignition what do you all think it would rev to? get one of those cheap tachs that wrap around your spark plug wire and see how high it revs :shrug: Quote
4stroker Posted September 26, 2007 Author Report Posted September 26, 2007 i just thought someone might know some rough figures for an average 7mil TREX... for example, 10000rpm? would it rev as high as 10? Quote
cd07 Posted September 26, 2007 Report Posted September 26, 2007 17000 is how high mine revs :biggrin: Quote
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