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Old 04-01-2002, 01:12 PM   #1
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HI
WHAT ENGINE WOULD YOU RECOMMENT TO BUY?
I am thinking of these :RS12T, JPRS12T, RBX12T5port, OFNA 7 port
or the RS12T5 is already in HK?
wich one do you think is the best
THANKS

MARC
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Old 04-01-2002, 04:15 PM   #2
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Default Re: What Engine Would You Recommend

Quote:
Originally posted by Croes.marc
HI
WHAT ENGINE WOULD YOU RECOMMENT TO BUY?
I am thinking of these :RS12T, JPRS12T, RBX12T5port, OFNA 7 port
or the RS12T5 is already in HK?
wich one do you think is the best
THANKS

MARC
Depends on a few things, what chassis are you running, how big is your track straight, and how windy is your track?

For a track with a 130' straight and medium technical infield the Novarossi CX12, MT12 and OS TR work really well. I have never tested above a 3 port engine on this track.

For another track I go to which is about 180' long and just all sweeping corners the RS12 or MT12 seem to be good choices.

As for multiport engines I cant help you sorry
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Old 04-02-2002, 12:57 AM   #3
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Hey Amg !

Did you get the RTU going ??

Dying to know if all the hype is true or not !!
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Old 04-02-2002, 04:07 PM   #4
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Quote:
Originally posted by muugen
Hey Amg !

Did you get the RTU going ??

Dying to know if all the hype is true or not !!
Yep I have finally put it in there and run it in. It has about 20 tanks on it right now so it is still a little tight. Initial observations:

1. Has great idle quality and is as easy to tune as a normal novarossi, but likes to run richer.
2. Has just as much punch as other MT12s from what I have seen so far.
3. On the straights even with my lowest gearing it has far too much RPM!! My straight is 42 metres long only. I am running a V1R with 16/48 20/44 gears right now, I have got some more optional gears to try soon.
4. I had a RS12 in there and I had my shift point set so that the 2nd gear came in when the acceleration nosed over, with the RTU it shifts too early now since there is so much more RPM on tap!!

I will let you know how it stacks up when I get the tune sorted out better, basically I need to gear it right.
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Old 04-02-2002, 11:10 PM   #5
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OK a few notes from my testing just now:

1. I had the temperature change radically on me (about 5 degrees celcius in 20 minutes) This required a large change to top end needle settings.
2. This engine has way MORE mid range punch then my old cx12 and rs12.
3. Still cannot gear it down low enough (I am waiting for some extra gears) for my track so I did some drag racing in the carpark It was a V1R vs a V1R, 17/21 with an OS TR vs a 16/20 with the RTU. The TR got out to an early lead but by 1/2 - 2/3rd of the way (about when we shifted into 2nd) the RTU kept accelerating while the TR dropped off. So it does definately have the RPM and hp advantage over a TR at least.

PS. I still have to tune it and the 2 speed some more as well, and the thing only has about 30 tanks thru it. Also there is the definate possibility that I suck at tuning engines and cars!!

Dennis feel free to comment on my observations......
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Old 04-03-2002, 11:09 PM   #6
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OK last point to add here after some more testing:

1. The RTU has a definate hp and RPM advantage over all these engines:

CX12, MT12, JP RS12, RS12, OS TR

These are the only engines I have conmpared it with at our track. So you can purchase a RTU or RTO and feel confident that you will have the most horsepower on the track...........
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Old 04-04-2002, 12:06 AM   #7
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Default RTU RTO?

What is RTU and RTO stand for?
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Old 04-04-2002, 12:19 AM   #8
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So you got the fastest engine at the track then !!

RS-12 JP are the fastest legal engine around down here, but you still wouldn't say there is a big difference between a JP and a Standard RS.
You would know what these engines are like so do you think you can clearly see your RTU pull away from a JP ??

Cos its still a hard choice when -
RS = $370
JP RS = $450
RTU = $600
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Old 04-04-2002, 12:21 AM   #9
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Default Re: RTU RTO?

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What is RTU and RTO stand for?
RTO - Ready To Obliterate
RTU - Ready To Ubliterate

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Old 04-04-2002, 12:43 AM   #10
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Quote:
Originally posted by muugen
So you got the fastest engine at the track then !!

RS-12 JP are the fastest legal engine around down here, but you still wouldn't say there is a big difference between a JP and a Standard RS.
You would know what these engines are like so do you think you can clearly see your RTU pull away from a JP ??

Cos its still a hard choice when -
RS = $370
JP RS = $450
RTU = $600
My MT12 based RTU is clearly faster than a RS12 on our 130' track. It is a matter of your expectations It will equal or better all engines in bottom end and mid range and it will be faster on the top end, but you will not be 1/2 a straight quicker

You cannot compare the RTU mods to the JP mods the RTU is far superior, and I think they are worth the money. You can also get a RTO which I hear is much quicker than the RTU. The beauty of the RTU is that it is IFMAR legal and it gives you a substantial edge over the competition. The only unknown is how the RTU stacks up against the newer multi port engines, but again I have heard that they have an edge over these as well.

Last edited by AMGRacer; 04-04-2002 at 02:51 PM.
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Old 04-04-2002, 02:53 PM   #11
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Quote:
Originally posted by muugen
So you got the fastest engine at the track then !!

Cos its still a hard choice when -
RS = $370
JP RS = $450
RTU = $600
Basically yes I have the fastest engine at our track. Another of my racer friends has a modified MS modified () which hauls ass (modified by the Oz Mugen agent) and the RTU is quicker than this motor as well.
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Old 04-04-2002, 04:28 PM   #12
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RTU's really shine on a 190 to 250 ft track. Yes they twist hard, On a long track they really stick out like a sore thumb, They have a distinct intake howl that no other 12 has. The intake is louder than the exhaust most of the time.
You need to be geared 1 tooth lower on first pinion and 2 bigger on the 1st spur. Gear the second pinion with a three tooth split from first such as 16/19. get away from the 4 tooth split you don't need it on that short of a track. Gear deep and twist it up.

Try 15/17 49/46

Are you using an inline tuned pipe? If not take 1/4 in off the header

U is the current legal Roar and ifmar legal engine
O is the open engine not legal at the moment. Spins harder and must be geared even deeper. Long big tracks only unless you can gear deep enough. If you can get the gearing right for a short track hold your hat down when the car goes by.
All are non turbo.
Eagle is the nine or eleven port model that is built in limited supply, usually a dozen a year is all.

I produce the only nine and eleven port 12 engine anywhere in the world today.
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Last edited by Motorman; 04-04-2002 at 04:42 PM.
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Old 04-04-2002, 06:16 PM   #13
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Yeah our track is so puny, about 130 foot, that it really does not take good advantage of the engine. I am currently sourcing some mugen pinions to try and gear the car as low as i can
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Old 04-04-2002, 08:27 PM   #14
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I HAVE AN MS MODIFIED MEGA AND ITS GOT SOME CRAZY PUNCH COMPARED TO MY OLDER MODIFIED XT12.
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Old 04-06-2002, 04:09 PM   #15
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ARE THEY THE SAME DO THEY PERFORM THE SAME:RS12T
AND CAN YOU FIND THE RS12T5 IN HONKONG
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