.21 engines in Truggies
07-07-2008, 09:19 AM
#26
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RE: .21 engines in Truggies
I have an OS .21 V-spec in my CRT pro with a 13T clutch bell, a rackwerks speed 3 clutch and a JP-3 pipe using an OS P3 turbo plug and it is plenty for such a heavy truggy. It comes off of corners like a bat outta hell with plenty of legs for a decent sized straight.
07-13-2008, 09:50 AM
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RE: .21 engines in Truggies
mega zx-21 in hyper st pro geared 13/46, flys out of corners and clears all jumps. bring on the 28's, i'll be lappin'em while they refuel.
07-14-2008, 08:37 AM
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RE: .21 engines in Truggies
Nearly finished the MBX5T, hopefully should be starting the breakin tomorrow on the Go .21 5P. Its geared at 13/46 so from reading about it should do alright 
07-14-2008, 09:20 AM
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RE: .21 engines in Truggies
I used to think a truggy needed a .28, once i put a sirio .21 in my truggy, I finally come to see what everyone was saying, its more useable power and honestly it almost seems more powerful because of it, of course a the STI CL7B is a powerful .21
IF your having trouble with some jumps start with messing with your suspension, then your clutch
IF your having trouble with some jumps start with messing with your suspension, then your clutch
07-14-2008, 09:31 AM
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RE: .21 engines in Truggies
More then enough engine for it,
IT was just dynoed in the recent rc xtreme mag.
Think it was
Peak HP 1.4
avg HP .96
Torque was
Peak 60 oz
Avg 40oz
Not exact, i posted the exact dyno figures in another thread
IT was just dynoed in the recent rc xtreme mag.
Think it was
Peak HP 1.4
avg HP .96
Torque was
Peak 60 oz
Avg 40oz
Not exact, i posted the exact dyno figures in another thread
07-14-2008, 10:19 AM
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RE: .21 engines in Truggies
You can get a more powerful motor in that price range though,
After seeing the Dyno of the tunes GRP vs the Sirio CL7B, i'll go for the sirio
After seeing the Dyno of the tunes GRP vs the Sirio CL7B, i'll go for the sirio
07-25-2008, 03:19 PM
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RE: .21 engines in Truggies
ORIGINAL: Oasis TR
What motor are you using..I'm clearing them and so were most the guys with .21's that i saw..you might need to adjust your lines..any jump a buggy can clear i can clear with my truggy..
..you might need to tune your clutch to get more "snap" outta the corners or go to thicker oil in your center diff..it's not always your motors fault for not clearing jumps..if your at Rev and Lutz is their..watch how fast he is with a .21..it will change your mind..
ORIGINAL: wrob
I have a .21 in my Truggy... I was at Revelation raceway last week with my buggy and the same engine as my Truggy. The new track is setup with some double jumps right out of the corners. I was coming up short by about a foot on the jumps. I think I can get the power out of the engine for the buggy; making the jumps possible. I'm just not so sure about my Truggy. I don't think I've got the power in my .21.. So, I too am now wondering about my decision to put a .21 in my Truggy. I came about a inch this morning from buying the Ofna Picco .21 9 port engine. It wouldn't take much to convince me to buy a GO .25. Torque, RPM and fuel efficiency is what I need.
Seems like tracks are headed toward Supercross style jumps. Which is fun, but requires extra torque.
I have a .21 in my Truggy... I was at Revelation raceway last week with my buggy and the same engine as my Truggy. The new track is setup with some double jumps right out of the corners. I was coming up short by about a foot on the jumps. I think I can get the power out of the engine for the buggy; making the jumps possible. I'm just not so sure about my Truggy. I don't think I've got the power in my .21.. So, I too am now wondering about my decision to put a .21 in my Truggy. I came about a inch this morning from buying the Ofna Picco .21 9 port engine. It wouldn't take much to convince me to buy a GO .25. Torque, RPM and fuel efficiency is what I need.
Seems like tracks are headed toward Supercross style jumps. Which is fun, but requires extra torque.
..you might need to tune your clutch to get more "snap" outta the corners or go to thicker oil in your center diff..it's not always your motors fault for not clearing jumps..if your at Rev and Lutz is their..watch how fast he is with a .21..it will change your mind..
07-25-2008, 03:44 PM
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RE: .21 engines in Truggies
i run a werk B3 .21 in my st-1. actually works pretty well in my trug, lots of bottom end out of the 3 port, and the top end is pretty good too. i have no problem clearing jumps on the track with it.
07-25-2008, 08:44 PM
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RE: .21 engines in Truggies
ORIGINAL: supertib
IMHO heavy Truggies like a Hyper ST or Kyosho STRR or CRT do much better with .28's....Light machines like a MBX5T and Losi 8T do much better with .21's..... Heavy machines need a 28 just to match the power/weight of a lighter machine with a strong 21......my Hyper ST was a pooch with a .21, way slower then a 8T with the same motor............ Also to be considered is track surface and layout
IMHO heavy Truggies like a Hyper ST or Kyosho STRR or CRT do much better with .28's....Light machines like a MBX5T and Losi 8T do much better with .21's..... Heavy machines need a 28 just to match the power/weight of a lighter machine with a strong 21......my Hyper ST was a pooch with a .21, way slower then a 8T with the same motor............ Also to be considered is track surface and layout
so you are saying that my st-rr is to heavy for a 21 huh! i wonder why im eating those 28's alive in the straights with my puny little 21!
07-25-2008, 11:41 PM
#40
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RE: .21 engines in Truggies
ORIGINAL: hkenvy91
so you are saying that my st-rr is to heavy for a 21 huh! i wonder why im eating those 28's alive in the straights with my puny little 21!
ORIGINAL: supertib
IMHO heavy Truggies like a Hyper ST or Kyosho STRR or CRT do much better with .28's....Light machines like a MBX5T and Losi 8T do much better with .21's..... Heavy machines need a 28 just to match the power/weight of a lighter machine with a strong 21......my Hyper ST was a pooch with a .21, way slower then a 8T with the same motor............ Also to be considered is track surface and layout
IMHO heavy Truggies like a Hyper ST or Kyosho STRR or CRT do much better with .28's....Light machines like a MBX5T and Losi 8T do much better with .21's..... Heavy machines need a 28 just to match the power/weight of a lighter machine with a strong 21......my Hyper ST was a pooch with a .21, way slower then a 8T with the same motor............ Also to be considered is track surface and layout
so you are saying that my st-rr is to heavy for a 21 huh! i wonder why im eating those 28's alive in the straights with my puny little 21!
I guess it depends on what 28 and who's driving the 28...... OS Speed vs Ninja 28 down the back 200 the Speed gets beat like a redheaded stepchild !!!
07-26-2008, 12:54 AM
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RE: .21 engines in Truggies
I keep hearing how heavy an ST-RR is and it's not..look at one and you'll see..At the last JBL series I weighed mine and it's not heavy, Plus given the ST-RR's "traction challenged" rear...28's on some tracks are not the hot ticket..
07-26-2008, 01:43 AM
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RE: .21 engines in Truggies
i will admit that ninja 28 is a nasty s.o.b.! im just trying to make a point in that post!
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
07-26-2008, 03:12 AM
#43
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RE: .21 engines in Truggies
ORIGINAL: hkenvy91
i will admit that ninja 28 is a nasty s.o.b.! im just trying to make a point in that post!
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
i will admit that ninja 28 is a nasty s.o.b.! im just trying to make a point in that post!
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
okay my bad then... I was under the impresion the St-RR was heavy....... but if it isnt then Its all cool with me...... I do know the Hyper ST is heavy, and it definitely was a struggle for a 21 to push on my track...
07-26-2008, 03:46 AM
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RE: .21 engines in Truggies
im trying to figure out where a strr is heavy i think the mbx5t is heavier ad i run a novarossi plus 21-5 in my crt and its more then enough. i had plans to buy another 528 after my go engine was a big dissapointment but instead i went to the 21 novarossi and im happy i did
07-26-2008, 07:08 PM
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RE: .21 engines in Truggies
ORIGINAL: supertib
okay my bad then... I was under the impresion the St-RR was heavy....... but if it isnt then Its all cool with me...... I do know the Hyper ST is heavy, and it definitely was a struggle for a 21 to push on my track...
ORIGINAL: hkenvy91
i will admit that ninja 28 is a nasty s.o.b.! im just trying to make a point in that post!
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
i will admit that ninja 28 is a nasty s.o.b.! im just trying to make a point in that post!
out of the hole the speed will take it because of more usable power instead of just ballooning the tires!
oasis mine isnt heavy either and yes they are a little traction challenged in the rear! but i made some diff changes and supension and it pretty predictable now , even with a 2 1/2 degree toe block
okay my bad then... I was under the impresion the St-RR was heavy....... but if it isnt then Its all cool with me...... I do know the Hyper ST is heavy, and it definitely was a struggle for a 21 to push on my track...
07-27-2008, 02:03 PM
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RE: .21 engines in Truggies
ORIGINAL: supertib
the STrr is not lighter then a MBX5T..that I know !
the STrr is not lighter then a MBX5T..that I know !
07-27-2008, 03:20 PM
#50
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RE: .21 engines in Truggies
ORIGINAL: Oasis TR
I wouldn't be so sure on that one..On my scales the ST-RR was a bit lighter..But I am using ceramic bearings in the ST-RR. Yesterday at the races we ran 30 minute mains..(during the day..The ambient temp was 100) they watered the track before our mains and it was dry in 10 minutes..[X(] the guys that run .28's were at a huge disadvantage due to the dry track. My Nova was just yanking them down the straights to..even when the track was wet the .28's had nothing for the .21's..but on that..their are some tracks that you need the torque of the .28..some of the tracks that I've been going to lately have been putting doubles and sometimes triples right out of a turn and as stout as my .21 is it just doesn't have the torque to clear them every time..I always bring a .28 just in case..I dont like .28's but i'll use them if needed..but the tracks that I race on or at..a .21 is the ticket..
ORIGINAL: supertib
the STrr is not lighter then a MBX5T..that I know !
the STrr is not lighter then a MBX5T..that I know !
i run both as well..I seem to have a pile of each this season LOL !!! 21's and 28's each have their place....On our track with its 200' straight and dirt surface a good .28 will beat a good .21.. Unless i bring out the modded Picco .21's abd RB C6's then we see the .21's holding their own...... I tune most of the guys at my track, which included pipe and head shims...so as a rule everyone's motor is running at peak potential.. Having a good tune will make all the difference in the world and as a rule most people never get their motors to full potential anyways..... On my track with me tuning both you'd need a hell of a .21 to run with the 28's we got...