Hyper .21 8 port engine ? c'mon lets hear it!
 

Hey guys,

Im about to get a hyper .21 8 port engine silver head ( pullstart) , I havnt ordered it yet or anything. its costing me $135 USD. I will be dropping this engine in my hyper 7.
Lets hear your views, Da smak has given me his thoughts and the thumbs up on this engine, im just interested to find out more opinions.

I will be racing in a few months but right now i need to practice. Thats why this engine is good for me.

Lets hear it! BTW , is 20% nitro the best fuel for this engine?

cheers

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Just a quick question: Why would you take Da Smak's(grahama89) word? hmm...interesting. He aint no expert thats for sure but neither am I! lol Anyway I have not run one of these myself, so my view probably means less, but I got mates who have and they reckon its great value with heaps of power. I know someone with way over 10 gallons on theirs and still going strong with no rebuild in sight!! Just goes to show you, treat any engine right and they will last a very long time.

In terms of fuel, it comes shimmed for upto 25% nitro. If you are going to race, you wouldn;t want to use any less than 25% in my view cuz you are not going to get the very best performance from it.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

It's a nice engine but does low runtimes...around 7mins.
You can also do a search on ofnas board...i think they prefer the purple 8 port instead.
I suppose you are getting the pro version with the silver head?

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

nah mate the pro(silver head) version is the one to get. Way more powerful than the purple stock version. 7 Minutes ya reckon? hmm interesting. whilst everyone tunes differently, I wouuld find that thats pretty inefficient for any engine I think and I haven't heard any feedback it that regard. Sounds like a rich tune to me if you only get 7 minutes. But anything's possible in the end I suppose..

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Your right, your view means a lot less. I raced the engine for 2 sasons, you probably didn't even know the 8 port Pro is a 14mm crank as opposed to the purple headed mills 13mm. But 7 mins is defo running rich, 8 - 8:30 is the norm in race conditions.

BTW there is NO expert in this hobby, just the more experienced.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I have three of the purple head engines and have always had good luck with them. I've never had the tuning problems or carb issues other folks complain about. None of mine have pullstarts.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I used to race the purlpe head 8port. its a great motor, but it is really lacking in low end grunt. If your track is large enough, its a great motor. I ended up replacing it with a Rossi P5 casue my track is a little smallish and i wanted more lower end performance.

Its also really cheap to rebuild. OFNA has a rebuild program. I think its like $65 for a new piston ans sleeeve, installed, just mail it into OFNA when you need a rebuild.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

^^^ yup I've got a purple one and am generally very pleased with it. Its fast on top end but does suffer low down. If you want top end speed though its great for the money. I run 25% in mine though you would be fine with 20% (might take a slight performance hit but for practise and bashing you'll be fine).

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I have two of the .21 8 port purple head ones and they are really nice. no issues at all with them. they get between 7 1/2 minutes to 9 depending on the size of the track and the tune.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

They are OK, They dont have a lot of bottom end which is really important, they have good top end though I had 2 of them they arent the best at holding a tune...........

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

i tried my buddies pro version in my 8ight and it doesn't have enough bottom to confidently clear short run doubles/triples every lap consitent..top end is great , but you need bottom aswell especially on jump technical sections where you don't have alot of room to get up to speed.

i personally run STS engines and they are hard to beat power/money wise..

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Very intersting replies guys, The generally idea im getting is that its a reliable powerful engine that lacks in low end. Im only fairly new to nitros and have never raced before and as i said, i will be practising for 2-3 months before i do. So perhaps this engine is good for me. Im not planning to win any races too soon. Maybe not the greatest low end is better for me for learning ect.

**have people replaced the carbs or backplates?, all things i want to know.
I want to hear of from a few more people that have the .21 8 port ***silver head pro*** As alot of people have said they have purples.
When im bashing/ practising , is it in my best interest to run 20%? even if it does run a few km/h slower? , as i dont won't to wear and tear the engine too soon.

Thanks fellas , keep it coming!

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

It's not a high end engine.
If you check on the dyno x-treme mag did for it(8 port) it shows that it's max torque appears to be at around 15000 rpm which is way down low but the point is that it isn't much either so...

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Check the graph thoug, it's torque is highest there, but it doesn't drop off til 37K, not many other engines have a band that long.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

To get them to hold a tune better a lot of people will put a OS MAXX or other carb on it. IN stock form you have to tune them often. The best carb for them id the one off the os rg .21 engine I think it is a 10 E. If you are new you might want something that is easier to tun and holds a tune better. MY reccomendation for your price would be a os VG .21 $145 or a sts d21b $130 approximatly. Or for a bit more $175 a werks b3 or a novarossi/rex .21 bt/bf. These are very FAST,reliable ,smooth and tune well and will hang with the big dogs........Take care/...........

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Can you post it up...i haven't seen it anywhere?

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I do use the OS carb but for no other reason than its easier to use. I had no technical problems with the hyper carb, it was just slightly less easier to get a tune on it.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Well im no expert but have three of em and they do all right but seven to eight minutes is the norm for them,and low end is lacking just a little and the carbs are a bit fussy,i also have a hyper 21 not an eight port though in an ofna pirate ten that does well.I ended up with alot of ofna monsters and pirates over the past few years.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I'll refer you to this thread first, just to refresh your memory. [link=http://www.rcuniverse.com/forum/m_4887011/anchors_4916974/mpage_1/key_/anchor/tm.htm#4916974]The Thread.[/link]

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Hey guys,
I have decided to get this engine.

I am going to run this engine on 20% nitro, with 25% for races ect in a few months.
I have decided to buy a different carb for this engine as i really dont want any issues right from the start.
Is the OS 10e carb the one i should be looking at?, Many guys said they use a differnt carb to the stock one but not many people said which carb that was.

Does anyone have good links to break in methods on this engine? , Should i idle it for about 1.5 tanks, 1/4 speed on 2nd tank, 1/2 speed on 3 +4th tank , 3/4 on 5th tank, and start hitting full throttle on 6th tank? all while running it fairly rich.

thanks guys!, hit me up with a good carb that keeps a good tune ect!

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

The carb you want is the OS 20E. The same used on the now obsolete RG. The 10 E is for smaller engines I think. look for an old engine on ebay as the carb itself is about $40 as I remember. Don't spalsh loads of money on it just keep looking and use the 3 needle one until one comes up.
Thats my advice anyway

P.S. for break in use the heat cycle method. Click [link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=397]here[/link]

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

LOL Graham contrary to your belief I do know a thing or 2. Geez dude of course its got a silver head. Its the pro race version rated at 2.7hp not 2.5 like the purple head. I'm looking at one right now in my hands! I own one but have not raced it YET. Got way better engines thesedays so I have no need for it.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

I thought that I had heard somewhere that the "Pro" silver head was better suited for on road. Something about it having even less torque than the purple head and more RPM's. Maybe thats why most people here have more experience with the purple head?

Just a thought. Maybe someone can confirm

Thanks

JOhn

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

Contrary to your belief my name is not Graham, and the head can be fitted to any Hyper 21 in the range fyo. I too am looking at one in my hands and it's done 13 gallons and is still as sweet as it's first day when running. I had a great time with these engines and really do know how well they run.

RE: Hyper .21 8 port engine ? c'mon lets hear it!
 

more on the carb please?
I am actually quite annoyed to hear that is cost $40 for the recommended carb for this engine. That turns it into a $175 engine with $135 performance, perhaps this isnt the engine for me as i can get a STS d21t for that price and i will not have to buy a new carb?

surely there are cheaper carbs that are suitable
thanks guys?