Radical 621P running too hot ???  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> 1/16th, 1/18th, Mini & Micro RC Cars >> IRC Racing Support >> Radical 621P running too hot ???
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Radical 621P running too hot ??? - 9/4/2006 3:32:42 AM   
94corvette


 

Posts: 61
Joined: 5/27/2006
From: palm springs, CA, USA
Status: offline 		hi, i'm in the prosess of breaking in the motor. ( had it for a while but no time i'm not sure that i used the right plug ! it's a OS P3, the first few tank the tempertur is raise very quickly, ( both needle are very lean ) the temp is about 265 F and still go up, i had to shut it down...i'm pretty sure there are no leak, i used 30% fuel. but today i ran it again and temp is a little better, about 225-235, the power is unbeliveable, fastest one i ever own, absolutely love it. i'm getting one more next week proprebly 621T.
oh, i live in palm springs, it's pretty hot here, always a high 100s at this time of the year.
do i need a new plug ? or fixed any thing els ?? oh, it's in Kyosho SP2 with JP3 pipe, if you need to know.
thanks in advance...

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RE: Radical 621P running too hot ??? - 9/4/2006 4:52:11 PM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		The car looks nice, from what I can see in the picture it appears the top end is too lean, what carb insert are you using? adjust the top end needle all the way in, then back it out about 3.0 full turns, that is a good place to start, on the bottom end you want to start about 2.0 turns in from flush, ( it looks like it about there now)....give that a try and let me know how it works out.....

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RE: Radical 621P running too hot ??? - 9/7/2006 5:26:05 PM   
94corvette


 

Posts: 61
Joined: 5/27/2006
From: palm springs, CA, USA
Status: offline
quote:

ORIGINAL: Mindcrime

The car looks nice, from what I can see in the picture it appears the top end is too lean, what carb insert are you using? adjust the top end needle all the way in, then back it out about 3.0 full turns, that is a good place to start, on the bottom end you want to start about 2.0 turns in from flush, ( it looks like it about there now)....give that a try and let me know how it works out.....


hi MC, i've used the biggest hole on carb insert, and i check the top needle it's not that lean but i reset it like you said, haven't run it yet. i'll let you know how's it go. Thanks for a quick answer...

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RE: Radical 621P running too hot ??? - 9/16/2006 8:13:19 PM   
94corvette


 

Posts: 61
Joined: 5/27/2006
From: palm springs, CA, USA
Status: offline
quote:

ORIGINAL: Mindcrime

The car looks nice, from what I can see in the picture it appears the top end is too lean, what carb insert are you using? adjust the top end needle all the way in, then back it out about 3.0 full turns, that is a good place to start, on the bottom end you want to start about 2.0 turns in from flush, ( it looks like it about there now)....give that a try and let me know how it works out.....


hi, i ran it today, it run perfectly, very strong on all of power band . temp is about 220-230, on a little rich side on top needle. i had run about 8-9 tank so far, when should i really satrt tuning for power! and any tip on how to keep it running FOREVER Thanks.
Oh, what do you think between this engine (621P) and 621T, is there a really different in torq ? i just order a new car (Xray TQ) i need one more engine, it's about $50 different between the two, Thanks.

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       Post #: 4

RE: Radical 621P running too hot ??? - 9/18/2006 6:05:02 PM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		I would say for truggy the T or the P will be great, for buggy I prefer the T......the price should be about the same, I know one dealer was selling the P's pretty cheap for awhile, but that has since changed.....

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RE: Radical 621P running too hot ??? - 12/4/2006 8:35:00 PM   
carguy70001


 

Posts: 24
Joined: 11/23/2003
From: Metairie, LA, USA
Status: offline 		Where is the best place to buy replacement parts for both the 21 and the 28 Radical powerplants?

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       Post #: 6

RE: Radical 621P running too hot ??? - 12/21/2006 2:46:44 PM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline 		Whats better for a truggy. T or P?

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RE: Radical 621P running too hot ??? - 12/21/2006 5:41:13 PM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		I personaly like the T for truggy and buggy both.....but we now also have the new .28 that is outstanding in truggy! tons of power and great fuel economy

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RE: Radical 621P running too hot ??? - 1/6/2007 1:03:58 AM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline 		Well i got the 612T. Is it o.k. to use a e-clip to hold on the clutch bell? I had no washers so i used an e-clip. Looks like it works but i want to make sure. Thanks.

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       Post #: 9

RE: Radical 621P running too hot ??? - 1/6/2007 2:06:12 AM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		Yes you can use an e-clip, I use both an eclip and screw just to be safe, also make sure you don't have the low end needle too rich, the engine will still run ok, but will tend to run a bit hotter than normal and will not give you the best perfomance.....I good starting point is
2.5 turns in from flush on the low end, and 2.5 out from closed on the top end....let us know how it goes!

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RE: Radical 621P running too hot ??? - 1/6/2007 3:18:27 AM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline 		Is that for break in or should i break it in with factory settings?
quote:


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       Post #: 11

RE: Radical 621P running too hot ??? - 1/6/2007 3:31:59 AM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline
quote:

ORIGINAL: SOOJIAN

Is that for break in or should i break it in with factory settings?
quote:





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RE: Radical 621P running too hot ??? - 1/6/2007 4:49:23 PM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		Use those settings I gave you for race tune, all you need to do for break in is richen the top end a slight bit and you will be fine, and keep inmind operating temps will be around 200

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RE: Radical 621P running too hot ??? - 1/6/2007 4:55:39 PM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline 		Thanks. The rain is drying up outside here in jersey so i am going to break it in soon. I will let you know how it all goes.

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RE: Radical 621P running too hot ??? - 1/7/2007 12:39:33 AM   
SOOJIAN


 

Posts: 164
Joined: 7/8/2005
From: Pompton Lakes, NJ, USA
Status: offline 		Well everthing went great. This motor is sick. I just started to tune for power & even with it rich this thing moves! I can't wait for tommorrows race practice session. Can't wait to see what this thing really has. Ill keep u posted.

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RE: Radical 621P running too hot ??? - 1/7/2007 11:44:44 PM   
Mindcrime


 

Posts: 207
Joined: 1/31/2006
From: Phoenix, AZ, USA
Status: offline 		Cool, glad everything went well for you!!! keep us posted.....

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