posted
Purely informative! And this is relating to a RB engine. I am sure 90% of TM728 owners like myself did not know the specs. Knowing where the torque and hp peaks might help with gearing selections.
[ 12. January 2008, 10:36: Message edited by: Cobra1 ]
Posts: 7 | From: South Africa | Registered: Dec 2007
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posted
well its not the most powerful .28 but it sure does look silky smooth. the torque curve im speaking off.
Posts: 44 | From: beaver falls, pa | Registered: Sep 2007
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posted
The problem with these measurements is that we do not know if the measuring device is calibrated and of the readings are right, the curve is probably exact but can certify nothing about the figures mentionned.
posted
Agreed Rody there are too many variables when doing a dyno run but as rbbigblockrevo points out the curve is nice and smooth unlike other engines tested. I can only speak of praise about a TM728 in my Savage. I could never pop a wheelie before on flat ground but with this engine its easy also a better top end being able to pull the 3gear tranny effortless. In other words better low end torque and peak RPM reached.
Posts: 7 | From: South Africa | Registered: Dec 2007
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posted
IMO....you would have to dyno all other .28 engines on the same dyno....same pipe....same plug...same fuel....to get even a remotely close comparison...
The bad part about that, is that each engine has their own characteristics....Timing has alot to do with it...so pipe preference to get maxx HP out of each mill would come to play...as well as some other engines do not come with top notch carbs, that can accept 9mm venturi...in which from my exsperience with a Mach 427, plays a crucial roll, when you upgrade the carb....and even then, quality has alot to do with engine choices for me...I've got a long list of comparibly powerful engines, and none of them have lasted as long, as well as have been as maintenance free as my two RB928's...
But for what it's worth...I'm starting to see from the numerous dyno sheets I've seen, that peak HP doesn't mean anything...the curve is what makes an engine racable for a specific track condition or your driving style...And if a stock engine manufacturer can't give you that, then you can always turn to a modder that can either taim or increase the power curve...
Check out this graph of the 928....The 053 peaked at the most HP...But everything else pulled more up to about 26k-27k RPM...And the 2045 and JP3 was probably the most linear/smooth...
posted
Thank you Dawgbone with you valuable input, this show that by only by changing the pipe it alters the behaviour of the engines. With this I would like to say that many combinations are possible on an engine to get a nice curve and to make it more driveable and that it is important to use the right pipe with the right engine.
posted
The TM728 already has loads of torque, if you use the 2020 pipe in combination with the 198 manifold then this could be overkill in my point of view. But this comination is possible of corse.
posted
ok thanks i go for the 2045 but wos is the best manifold for it to put in my xt8 truggy
Posts: 24 | From: malta | Registered: Nov 2007
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