Originally Posted by
air8
I've found the Plus4 more to my liking in truggy over the 21-7FMS. The FMS seems soft on bottom but flat rips at the end of straights. I'm using a Dynamite 053 and header with the FMS and Plus4. Does the FMS like a completely different pipe?
I'm loving the run time from both engines in truggy. Over twelve minutes for both with the Plus4 consistently closer to 14 minutes. This is on tracks that are probably medium sized, much smaller than the Nitro pit. Sizes average about 200 x 100 or close to it. And usually the front or back is a full straight.
These two have performed flawless for many, many gallons and oh so consistent. I'm in hog heaven and thank Monty for your services sir. So it looks like I'm gonna need another plus4 from you sir if you still have them available.
thanx
Chris Pearce
I have the Fms that has been completely modded by Mr Houston. The bottom end on the Fms is there but u just have to find it. What has worked for me was the nova 41021 header coupled wit the 9853ss. Try removing one of the small shims underneath the head. This will help with the bottom end and also tame the abrupt midrange-top powerband. Always run the most stiff clutch springs with hard aluminum shoes. And keep the clutch maintained. With this combination I have found that the low end is jus as impressive as my plus4c.