R/C Tech Forums - Arrow Racing GTR .21 Engine Thread

R/C Tech Forums (https://www.rctech.net/forum/)

- Offroad Nitro Engine Forum (https://www.rctech.net/forum/offroad-nitro-engine-forum-157/)

- - Arrow Racing GTR .21 Engine Thread (https://www.rctech.net/forum/offroad-nitro-engine-forum/461596-arrow-racing-gtr-21-engine-thread.html)

Quote:

Originally Posted by Mark Erce (Post 12278162)

Hey guys I got a question for ya,

I recently picked up a OS VZB Speed(old style). Has anyone here or heard of anyone rebuilding one of these with the new Arrow(5port) piston,sleeve, and rod? I am very curious to know the performance outcome in doing this.

Is it better to use the Arrow 5port sleeve or 3port sleeve?

Thanks

The 5 will have more power. The 3 should get better fuel mileage.

So With That Being Said Does That Mean The New 5 Port Does Not Get As Good Of Mileage ?

Quote:

Originally Posted by rcmania74 (Post 12278615)

So With That Being Said Does That Mean The New 5 Port Does Not Get As Good Of Mileage ?

The new GTR-II Plus 5 port is getting the about same or better. Most likely because it has a LCG head, redesigned head button and DLC crank. I am not sure which gets more but the new engine definitely has more power.

Any Idea What That New Pipe Will Cost?

Quote:

Originally Posted by VPProUSA (Post 12278178)

The 5 will have more power. The 3 should get better fuel mileage.

Thanks Gene

http://arrow-racing.net/temp/pic03_2.jpg

The new Arrow Racing Exhaust Pipe EFRA -2103 Now in stock at VP-Pro USA.

http://www.vpprousa.com/components/c...product/V2.jpg

Also due to popular demand, Arrow Racing has brought the 3-port GTR-21 back for those who want a smoother engine with great fuel mileage. If you miss the power band and very high top end of the old short stroke OS V-Spec, check this engine out! Now only $174.99!

I.got The Email About the Pipe Today While I.was At The Track ... I immediately Ordered It Using My.phone Internet Lol...Just Curious To See How It Will Compare To.The Dynamite 086... I Tell Ya What Im Super Impressed With My 3 Port... This Is My 1st Arrow And Definitely NoT My Last... I Was As Fast As Any Other Engine Out There... It Ran 260 Degrees...What Is The Usual Running Temp On These? Ive Seen Guys Say Up To 290... It Sure Is An Animal Thats For Sure

Anything under 300 degrees as long as you have smoke let it scream.lol

Quote:

Originally Posted by rcmania74 (Post 12281137)

See Scott, The best thing to have in this hobby is a open-mind. You can be super competitive and not have to break the bank while doing so. But then there's guys that must have those $500 engines....I just chuckle and walk away...and still have beer money in my pocket :lol:

Your Arrow ran very good today. I think 260-265 degrees is the sweet spot. I know we can get 9 1/2min out of it on our track which is very good. I want to see how that Arrow pipe compares. Well cya next Saturday bro.

I Just Caaaaan't Wait For That Pipe To Come... Im Pretty Stoked About That...hope Dirtburners Is Dry That Day !

hey has anyone run the Arrow 21 3port in a truggy? to they have the balls to run them?

Number 2 3 Port Is On Its Way To Me...its Going In My Truck And Im Reeeeal Sure It Will Push It.just fine.

Should Have My Pipe In 2 Days..... Eager to See How It performs

Got To Run My Pipe On My 3 Port For A Few Minutes Today... Coming From A Dynamite 086 It Had A Much Stronger Bottom With More Response... Top End Was Close To The 086 And I Still Need To Do A Touch More Tuning Since Switching... Im Pretty Happy So Far And Construction Is Amazing