ORIGINAL: sshine440

Ok I do agree i need to put a video up and now that i have a motor i will. but i have already did a different truck to get a true assumption of the moded picco i have its a xl with moded 3 speed and all hpi parts with my spur gear mod with a 38 tooth and a 19 tooth bell and as soon as it dries up i will make a pass with video .. i do agree with you both Borneoben and sv250 thanks for the info and i think the weight is just to get to speed quicker hence the limited distance to do this , i think it will make things interesting . And as far as the pipes i will show the pic to Rick and i would consider your offer Robin but im going to list them on e-bay and craigs list first .if no takers ill let you know. as far as knowing what these pipes do to make these motors happy im at a loss im just going off what my engine builder tells me, he has been doing this for a long time and has world record drag racing motors and that says allot to me , i will get the skinny on your pipe robin and pm you , now my personal opinion is that ,,, the 221t is loud and it does improve low end torque im thinkin a test on a stock f4.6 but would some one else do the test also, compare a stock hpi xl alum pipe and the 221t from a standing start and go 50 feet and stop watch it if it is better you should see a big difference dont care if its a x chassis or a xl but use the same truck just do the test back to back and do the best average out of say 5 passes on each pipe .