25% vs 16% Nitro Fuel- HPI Savage- Force .32 Engine

Simple speed and temp test with 25 and 16% nitro with my force .32 engine. I was expecting better performance with 25% nitro fuel...
#HPI #RC #Savage

[@Savageboss52]

I did not see any other channel showing this comparison. excellent quality video

[@TastyBRC]

Thank you ! I really appreciate

[@SargeScum]

My Force 4.6HO started to leak too at some point. But you we're right on the power part of the 25%, more torque. I've noticed too. Been kicking it with 20% most of the time.

[@TastyBRC]

Same carb on both engines. But despite the leak it's running good. I tried to install a nova carb but it doesn't fit, different diameter...

[@christianarentoft2138]

A solution has been found - drop a shim between the coolinghead and engine (think thats where it sits) and achieve more torque 😁

[@voneboy]

Hey my dude! glad to find a further channel here on youtube who shows nitro content !! Just subbed you :-) Nice to see the direct comparison on the same Engine between the two nitro percentages ,furthermore it meets the reality for the most nitro guys here in Europüe,I"m currently trying to optimize a LRP Z.28 spec .3 for the 16% due the new crazy regulations..What a shame!!! Continue your awesome work here on KZbin ! Regards from another nitro guy ;-)

[@TastyBRC]

Thanks! I appreciate and i will check your channel too. If you remove a 0.1mm head shim the lrp 28 should run fine, hopefully we can still run 16% next year. As you said, european laws are a shame...

[@voneboy]

@@TastyBRCThanks for your reply! That is correct,as mentioned on the instructions manual themself,the factory installed head shim must to be removed in order to get a combustion camber distance of 0,65mm .. However,because I was curious to find out how the engine would running on the ols stock set up (0.75mm --> with the factory included head shim ) I"ve tried this ,as expected the low end power output was awfull even with optimizing carb settings !! I"m currently improve some kind of basic issues that the most of the LRP big blocks have,yeah the sealing troubles of the carb and so one ..Lol After I finished it,I will tune the carb andtry to reach the best performance on the safe side to gain some experience with this new topic of the absolutely stupid conversion from the good old 25% to the 16% in order to gain enough experience with this topic to be able to help all the other guys out there with less experience on engines.. "As you said, european laws are a shame..." A lot of modeller confendurations are right now busy trying to change this stupid regulation for us modellers..So the only thing we can do is expecting the worst and hoping the best my dude!!

[@TastyBRC]

@@voneboy Tuning any big block engine with the stocks shims and 16% is not impossible, but you will lose more or less power depending on the engine, and the tuning window will be smaller, wich means tuning headache.. removing the shim makes it easier and brings back some power. The real problem is that europe wants to ban fuel with nitro content higher than 12% !!!! 12% of nitromethane weight in your fuel equals 16% of nitromethane VOLUME of your fuel mixture, only 16% nitro volume will be allowed! That is why people still belive that the actual 16% nitro fuel wont be banned.... (your actual 16% nitro fuel contains +- 21% nitro volume and the 25%= 33%..) I really hope this wont happen

[@voneboy]

@@TastyBRC It"s exactly like you said,it"s possible,but with enourmeous lose of performance and I had noted how epic small the "window of tune" especially on the LSN was... In fact I don"t believe that this will happen ,but if this should happen I will begin to think about to move away from this EU prison!!! It"s in fact funny..Nitro is sooo dangerous,but hey you can order tons of Lithium polymer batteries that are in my oppinion even more dangerous..

[@GyuHobbyRC]

It is a great video with good information.🙏🙏 I saw it really well.😄 We look forward to good videos in the future.👏👍😀🙂😄

[@TastyBRC]

Thank you very much! I see very good content in your channel and will stay tuned ✌

[@NitroMike]

Great video man! I will need to try this for myself as well as removing 0.1mm shim when running it on 16%

[@TastyBRC]

Thanks! It would be interesting to make a comparison with a racing engine, the force 32 wasnt the best choice..

[@thomasteigen2793]

I use that fuel brand. Very good fuel. Its sad that we arent allowed to use higher than 16% in EU now. But anyway,im gonna continue to enjoy my nitros.🤪

[@TastyBRC]

Great fuel at good price. Here in France we still can buy 25% until february 2022, for the moment it is not a problem. In wich country do you live?

[@quintinlindsey7967]

So sick and tired of government overreach.

[@TastyBRC]

@@quintinlindsey7967 I couldn't have said it better myself..

[@sasquatchcrew]

Ok im an American and I have no idea why someone or some country would regulate such a thing. LIKE WHY If the law is because people are stupid and want to hurt others, stop making people so PISSED OFF that they have to do nefarious things. oh geez I want to go on a rant. I heard the EU has 3-4 laws on toothbrushes/toothpaste. Imagine that shit. Wheres the freedom? I don't know. America is getting worse too... Autogenocide? Fuck the EU as it stands.

[@TastyBRC]

@@sasquatchcrew well, they say that terrorists can make bombs with our fuel... Europe is a shame

[@sasquatchcrew]

im subbing keep making videos

[@TastyBRC]

Thank you! I will, as long as i can buy nitro fuel!

[@LawrenceTimme]

Can't wait to see the Revo in the next one :D

[@TastyBRC]

That lightweight revo with the p5 is going to be a lot faster than the savage

[@LawrenceTimme]

@@TastyBRC yeah. The engine will rev much higher as well.

[@TastyBRC]

@@LawrenceTimme just as the picco 24, less torque than the force 32 but revs higher, the savage is faster with the picco!

[@kennethcraft6563]

Love the nitro

[@TastyBRC]

Me too 😀

[@mdrc3288]

The Hotfire is a TOP fuel brand! Both should be fine however 16% is for 18 engines (3.0cc) and 20%,25%,30% or higher for 21+ (3.5+cc) engines.Great video in general though!!!🙂👍

[@TastyBRC]

Thank you 👍Totally agree! My favorite brand, great quality, low price

[@rodelgomez8144]

Did you change the tuning when you change fuel from 16% to 25%...

[@arnaudgossiaux6337]

Merci

[@TastyBRC]

De rien! Merci d'avoir regardé la vidéo

[@hakont.4960]

Seems like it got plenty of power even with 16% nitro. Definitely sticking with 16% in my Nanda BD8. Haven't measured the top speed, but it's more than fast enough for my noob driving skills. XD

[@TastyBRC]

For a basher or a noob at the race track like me, 16% is perfect, i can barely feel the difference with the 25%. It smokes well and it does not heat much more 👍

[@kvdb3865]

Bel video !grazie

[@TastyBRC]

Thank you too!

[@tornadogti959]

I've a Savage with a K4.6HO engine. Is the force .32 plug and play with the exhaust and existing engine mount?

[@TastyBRC]

Yes direct fit. The HPI F4.6 has the exact same block as the force 32, the F series engines were made by Force (4.6 and 5.9) the K series by kingstar.

[@tornadogti959]

@@TastyBRC currently it's a T13 clutchbell installed. Should I swap this also directly to the force or buy a new set clutch shoes, flywheel and another pinion?

[@TastyBRC]

@@tornadogti959 You can run you current setup, the force 32 is not an over powered engine, pretty close in performance to the 4.6, a bit more torque

[@78doffen]

Nice video 👍 . What oil % are there in this fuel you testing ? I Wonder if i can go as low as 10% oil and 25 % Nitro in my Force 32 and my Trackstar 32 ? .

[@TastyBRC]

Thank you! The oil % is not indicated .. but according to my retailer it has 10% oil. 10% oil should be perfect for your .32 IMO

[@daveshank1921]

When running 16% and under tou can run a hotter plug and also try and remove a head shim. It will need to run a lil leaner than 25% or higher. But it will still RIP.

[@TastyBRC]

I agree, 16% with a hotter plug or removing a shim and the engine Rips but less than 16 always sucks 😑

[@kamillapaj87]

What temperature tester do you use ? Do you have link ? Thanks 😊

[@TastyBRC]

The one I use in the video is discountinued. I replaced it by this one Sky Rc SK-500037 👍

[@roeloftooms]

You will gain back some power running at 16% when you remove a head shim of 0.1mm as suggested in many engine manuals.

[@TastyBRC]

I should have tried, i read you in a live stream with Nitro Mike👍! I would like to try with a racing engine, i think an engine as basic as the force.32 doesn't highlight the difference in power well.

[@rcrelatedstuff6092]

Great video 👍 I read that the oilcontent is only 9,5% in this fuel, is that correct?

[@TastyBRC]

Thank you, sry i dont know ! i asked my dealer but he couldn't answer either... this is by far my favorite fuel and the cheapest!

[@LawrenceTimme]

Did you retune for both fuel?

[@TastyBRC]

Yes.. i spent a lot of time tuning...

[@LawrenceTimme]

@@TastyBRC good. :D I bet the engine and the exhaust is more suited to low end power rather than high revs which is why the top speed wasn't much different even though the 25% felt more powerful

[@TastyBRC]

@@LawrenceTimme I agree, the engine is not great at top end, the difference at top end between 16 and 25% should be more obvious with a racing engine

[@drtracernum20]

did you retune between them? or keep same needle for both?

[@TastyBRC]

I had to retune, very different carb settings with different nitro % fuel

[@drtracernum20]

@TastyBRC ok, thank you, I was thinking you had compared them without tuning. I don't race my trucks. Just run around and some bashing. So 16% is what I have used for a long time, and I feel it's plenty of power for what I do.

[@TastyBRC]

@@drtracernum20 16% is fine, you get good performance, consistent tune and good temp.

[@leeboost3120]

Hi bro do you have a link for a new clutch bell & shoes set for the Force 32 big block engine many thanks

[@TastyBRC]

Got my clutch shoes from alixpres search HSP 081008, very cheap aluminium clutch shoes! I Am running the stock HPI clutch bells.

[@leeboost3120]

@@TastyBRC thank you so much mate

[@TastyBRC]

@@leeboost3120 You are welcome!

[@wrc2044]

How did you tune up your engine for 16%? mine was always running hot and cant even hit second gear for the most part. at glow So I'm wondering what glow plug you're using and how did you manage to keep the temp so low and at the same time keep most of its performance? And btw, I'm running an engine very similar to yours, it's a sh .28.

[@TastyBRC]

I also have an 8ports SH and even with 25% it tends to heat up more than force 32. I would say that the engines react very differently to the change of fuel, with this one the difference was not huge. I run a # 5 plug. Try to remove a 0.10mm head shim with the 16% to obtain performance very similar to the 25% and more ease of tuning

[@wrc2044]

@@TastyBRC but the car comes stock with only one copper shim, which i believe is for sealing.

[@TastyBRC]

@@wrc2044 I see, mine came with an extra .10mm shim, as you can see in my sh28 review video. The purpose of the head shims is to adjust the compression ratio of your engine, higher nitro content needs lower compression or the fuel will detonate too early. Lower nitro content needs higher compression or your fuel will detonate too late, causing power loss. If you have only 1 shim, you can run a hotter glow plug so fuel will detonate earlier with 16%, tuning will be easier and better idle. Wich glow plug are you running actualy ?

[@wrc2044]

@@TastyBRC the coldest one! maybe I should try a medium plug? currently running 6, but i have a 5 aswell!

[@TastyBRC]

@@wrc2044 your engine should run way better with a #5 plug, but i would go for a r4 plug with 16%. Keep in mind that tuning is always easier with higher nitro content, 16% allows a narrower tuning window.

[@BIGGHOSSRC]

What pipe are you running ?

[@TastyBRC]

Ofna jp3 👍

[@xXYannuschXx]

Can you adjust the head-shims on the force .32? Woud be interesting to see the comparison with it adjusted to the nitro content.

[@TastyBRC]

Yes you can adjust the shims, it would have been more interesting and maybe the power difference not even noticeable . I plan to make a new comparison with a 3.5 that will respond better to the change of fuel.

[@BelowAmbient]

if the speed is the same that means your gearing limited

[@TastyBRC]

Not really, not with this engine, the top end power of the force 32 sucks no matter the fuel or the gearing, main difference with the force running on higher nitro fuel is higher torque. With a race .21 engine there is a more noticable difference in the whole powerband so this engine choice was not the best for the Test..

[@rickgrafter]

why testing the speed with gps on gravel waist of time wheels spinning most of the time

[@TastyBRC]

As it is an off road car, on road speed test is pointless for me, i want to know if the car is going to be faster in real bashing conditions, plus the big tires have a good grip. Thanks for commenting

[@Adrian-izarchi]

I use 30% kkk

[@TastyBRC]

I wish i could use 30% too !