Go Back  R/C Tech Forums > General Forums > Nitro On-Road
SERPENT COBRA GT ENGINE CHOICES HELP! >

SERPENT COBRA GT ENGINE CHOICES HELP!

SERPENT COBRA GT ENGINE CHOICES HELP!

Old 08-20-2012, 06:04 PM
  #1  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default SERPENT COBRA GT ENGINE CHOICES HELP!

Hey guys, first off, i will start off by saying im glad to be a member of this forum and appreciate the great wealth of knowledge here. You guys rock!

Ok, on to the question, I am in the budget to buy a 1/8 gt car and i really like what i see in the serpent. What are some good engine choices? I've seen some people say that .21's dont have enough torque and .28's are too torquey and dont rev high enough? I'm confused as to what will perform well. I have a big block jato now with an os 21xz-r speed on it. I'm a speed junkie so i need something that will really get this car moving. I only bash around my neighborhood street but i dont care about the price. Here are what i've seen so far:

Novarossi Roma .25
Novarossi Keep on .21
Novarossi Flash .21 Rally
Novarossi 35 Plus .21
O.S. 21XZ-B Speed
O.S. 25XZ
O.S. 28XZ

If you have any more suggestions I will take those into consideration also. Thanks! You guys are the best.
howard85may is offline  
Old 08-20-2012, 06:07 PM
  #2  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

I'm looking for all-out speed and torque. Thanks in advance.
howard85may is offline  
Old 08-20-2012, 08:17 PM
  #3  
Tech Initiate
 
Join Date: Jun 2004
Posts: 33
Default

Novarossi Bonito
Wachsmann64 is offline  
Old 08-20-2012, 10:02 PM
  #4  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

Do you have any experience with this engine? How's the torque curve and top end?
howard85may is offline  
Old 08-20-2012, 10:51 PM
  #5  
Tech Fanatic
iTrader: (28)
 
5crossyourlip's Avatar
 
Join Date: Dec 2010
Location: dela-where?
Posts: 790
Trader Rating: 28 (97%+)
Default

OS 21 ZX-R speed... great torque and top end....guy at my track use the OS in both his GT and 1/8 onroad
5crossyourlip is offline  
Old 08-21-2012, 06:15 AM
  #6  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

Originally Posted by 5crossyourlip
OS 21 ZX-R speed... great torque and top end....guy at my track use the OS in both his GT and 1/8 onroad
Thats the engine I have, but my main concern was if it had enough grunt down low with it being an on road engine.
howard85may is offline  
Old 08-21-2012, 06:17 AM
  #7  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

I want to keep it to stock engines as well. So the best recommendation for a stock engine that will give me the most power down low and up top is what I'm looking for.
howard85may is offline  
Old 08-21-2012, 08:18 AM
  #8  
Tech Addict
 
Join Date: Aug 2012
Location: Salt Lake City, Utah
Posts: 503
Default

Personally I like the OS25 but I’ve raced the Roma also. As far as our tracks go the Roma and OS25 run neck and neck and stomp pretty much everything else here power wise on the straights. One caution I’d throw your way is the torque of these 25s, if you are not 100% planted these engines will slow you down while you chase the rear end of your car. Personally I’ve made the move to Novarossi 21s. With the heavier car I can pin it right out of the corner and not have to worry about the rear loosing traction and spinning out. The 21 Flash is an amazing powerplant. I personally run a Novarossi 21 5 port that was 199.99 and a Novarossi 35 Plus Tuned .21. Both engines pack enough power and top end without getting me in trouble on the bottom. You should also consider gearing a 25 for top end so you don’t have so much torque. Hope this info helps! If you are looking for a scary beast of an engine IN NOVAROSSI WE TRUST go for that ROMA and hang on! It will bring a smile to your face
TerribleTy is offline  
Old 08-21-2012, 09:16 AM
  #9  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

Roma .25 is looking good from what I've seen so far, based on the specs it's a dang good contender..
Keep em coming guys!
howard85may is offline  
Old 08-21-2012, 09:39 AM
  #10  
Tech Regular
iTrader: (2)
 
C-Trickle's Avatar
 
Join Date: Apr 2011
Location: Utah
Posts: 320
Trader Rating: 2 (100%+)
Default

Originally Posted by howard85may
Roma .25 is looking good from what I've seen so far, based on the specs it's a dang good contender..
Keep em coming guys!
I put a Roma in my boss's GT and a Bonito in a co-workers. Go with the Bonito! Even with an 086 its instantly on the pipe. Crazy smooth power band. The torque is really just a shade less than a .25, it's uncanny! To me both the OS25 and the Roma have way too much of a light switch feel. Whereas the Bonito is butter smooth, and the Bonito doesn't give up power to anything! It's nutty quick! The Flash Rally is ok, crazy top end punch, but no bottom. Check out the Kappo Rally for something with more RPM compared to the Bonito. It's just an updated Kangaroo. The Keep On would be a waste of $$$ in a GT car. You'll find with any 9 port .21 that you'll have to gear down to get the torque you need, sacrificing mileage.
C-Trickle is offline  
Old 08-21-2012, 09:51 AM
  #11  
Tech Elite
iTrader: (18)
 
Serpent-Dan's Avatar
 
Join Date: Dec 2007
Location: Florida
Posts: 2,970
Trader Rating: 18 (100%+)
Default

Go with the NovaPlus 28 5T
Serpent-Dan is offline  
Old 08-21-2012, 10:03 AM
  #12  
Tech Champion
 
Join Date: Jan 2011
Posts: 6,299
Default

Just speaking theoretically, I bet an Alpha A872 would be good. Known to be a tad soft-ish on bottom in buggy, but to have a never-ending top... How much does a Serpent GT weigh anyway? Assuming a tad lighter than a race-ready bug...

Alphas IMO are underrated just cuz they're not Japanese. They make big power though, are easy to tune, and last long.. And oh yeah they're not overpriced.. With the 2090 pipe too you have even more adjustability with the changeable stingers... Just a thought.. Bit of talk of bad bearings in the Novarossi thread too
Herrsavage is offline  
Old 08-21-2012, 10:12 AM
  #13  
Tech Adept
Thread Starter
iTrader: (3)
 
Join Date: Aug 2012
Posts: 145
Trader Rating: 3 (100%+)
Default

Wow! So .25's are on/off motors, on road .21's are sluggish off the bottom, nova bonito 7 port or kappa rally! This is good info. I see the kappo has less hp than the bonito but more rpm? Alpha anyone
howard85may is offline  
Old 08-21-2012, 10:19 AM
  #14  
Tech Champion
 
Join Date: Jan 2011
Posts: 6,299
Default

Alpha also has a very reasonably priced .23 which is meant to be a screamer - on top end.. Torque is a given.. (especially with an 0801 pipe..)
Herrsavage is offline  
Old 08-21-2012, 10:47 AM
  #15  
Tech Elite
iTrader: (18)
 
Serpent-Dan's Avatar
 
Join Date: Dec 2007
Location: Florida
Posts: 2,970
Trader Rating: 18 (100%+)
Default

Serpent team Ace Paolo Morganti runs the Plus 28 5T and has won with it!!
Serpent-Dan is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.