View Full Version : Yyyeeaaaaahhhh!!!!!!!!!!!!!!!!!!!!!!!!!
07-03-2002, 01:44 AM
I just went to my lhs today and exchanged my trx engine!!!!! I got a brand new one!!!!!!!!!!!!!!AAAhhhh.:D :D :cool: . I put everything together this night and stayed up till 12:00 putting everything together. I put some newer fuel lines and stuff and adjusted the throttle. :) (in my mind... YES!!!!!!!!):) :cool: :p . I did everything so hopefully in the morning, if i have time i will break in the engine. When i pulled the pull start, the engine has so much freakin compression. IM like woooohhhhhhooooooooo:D ;) . I will keep you posted on every detail. On how break-in was, how top-speed was, and overall performance.!!!!!!!!!!!!!!! YYYYAAAAAAHHHHHHOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!
07-03-2002, 04:14 AM
It's the same engine armand, jeeeeeeeeeeeez, lol u gotta see this guy in person.. he cant sleep, lol.
yea we were getting bummed out by all the prices of the engines and said oh what the hey u know what, lets use the traxxas exchange program and get us a new one for 70 bucks. Prolly next time i'll dump the extra cash and go for a screamier engine, hehe. What had happened to the old engine (as far as i can tell) was the bearings around the crank shaft were really screwed up.. i dunno how but it didn't even look right. This caused the piston to go too high and destroy glow plug coils and the connecting rod hit too low, making the rod and case se so nicely. Metal shraplings magically appeared on top of the piston head on the last 2 runs. The piston had dings in it on the sides somehow. The crankshaft had major scratches on it! Around 2.5 gallons were put thru the engine, this was my 1st engine but i kept it clean inside and out 24/7. So.. that was the case with the old one that is off my hands now, hehe.
Now, this is my second nitro engine ever and with the experience of the 1st one, i believe i can make this perform really great (if it holds a tune, hehe). For money reasons, we decided to just go w/ the trx15 again b/c all we really wanna do is drive it anyway, we're not truly racing anybody, so we're not drooling for power, hehe.
Well anyway... there's not tooo much importance of this post just yet so i'll ask a question to maybe spark information, hehe.
What pointers do you guys have for breaking in the engine, tips that are not mentioned in the manual?
edit: OH! i have a question also, some people have removed the thin gaskets from teh cooling head (1 thick remaining) and apparently have had successful results like some more power. Anybody know the real truth to what side effects this can create? Because if this isn't a dangerous idea, maybe i'll break in the engine without those thin head gaskets.
07-03-2002, 07:30 AM
For break-in puposes, I would wait to pull any shims out form underneath the head. once everyting is seated properly, then you can start to look for performance enhancers.
Good luck with the new engine!
07-03-2002, 09:12 AM
I took the thick gasket out of the pro .15 in my nitro pede. I don't know if it did any thing because i did that before i broke it in. One thing was for sure, once you grabbed that trigger you better hold on. Oh and don't use hot plugs, the engine will pre ignite and never stay running the hottest plug you can use is a medium temp plug.
4 tec lover
07-03-2002, 10:07 AM
After porting my engine I tried running it without the gaskets like a magazine suggested and I ran it with 3 gaskets. I did notice that with the extra gasket it would rev up alittle faster, less compression to hold it back. With no gaskets it would take off good but it had no top end. So I am back to running it with one gasket in it, the thin one, and it runs great. I am aslo running the Ofna plug in it, short and hot. I also have a brand new Ofna P8 .21 that I am breaking in so I have plugs for both right now, and the lhs is out of the Traxxas plugs.
07-03-2002, 10:12 AM
your going to love that ofna engine. I like the older version the 6port, it's a beast and i'm not done breaking it in.
4 tec lover
07-03-2002, 10:22 AM
The engine I thought I was ordering was this one.
But when it cam in the case was black with a tall purple head and had a boost plate installed already. The engine is mounted in an old Kyosho Inferno. So far I am on my 4 tank of gas and still running pig rich. This engine is awsome, I love it. It has already destroyed 2 back tires, and I mean destroyed, tore a big chunk of the tire completely off. It was partially user error cause I was running the dirt tires on pavement trying to break it in right. I'm not sure if I really want to lean out the engine any with the power it has already. I am running the 18 tooth clutch bell on it and I would bet money it would smoke my 4 tec. I love speed.
07-03-2002, 12:58 PM
4 tec lover
you have a .21 engine in your 4-tec?
the engine you have here Ofna Delta Force P8 looks nice
has a 2.3 BHP at 40,000 RPM and a max of 41,000 RPM!!!!
so I was wondring if that fits the 4-tec? and if so then how?
07-03-2002, 03:05 PM
He's putting a .21 in his buggy, not n4-tec. And dont get out of the subject.
07-03-2002, 03:07 PM
onebig.. sorry I didnt mean to get off the subject,, all I thought is he has .21 in the 4-tec.. that is all
4 tec lover
07-03-2002, 03:35 PM
I was going to put a .21 in the 4 tec but I started thinking of all the mods needed to be done and the wear and tear on the car and decided not to. Personally I think if you want a vehicle to run with a .21 get on that comes with one like a schumacher. My buddy has the desert storm with a 3 speed and it does fly up to 2nd gear, 3rd gear puts it on the roof every time. But every time it wrecks it breaks something. He has the new fushion on order from Schumacher also that has a .21 with a 3 speed. I want to see how my 4 tec keeps up with it. The desert storm gets me in the take off for about the first 10 feet then I pass it up till he hits 3rd gear and flips trying to keep up with me. If the fushion out runs my 4 tec then I am putting a 2 speed in the buggy and spanking him once and for all.
07-04-2002, 10:38 PM
Ok, i just broke in my engines 6 tanks yesterday. Now my driveway is all fuel from the richness of the car.:D I cant control the car! All fuel is on the back tires and after i broke the engine in, i was doin donuts and everything! Now my car is crazy fast. The acceleration is so much smoother and now my car is perfect!:) I am very surprised how a new trx is. I think the trx is an engine that will satisfy a beginner and a racer. :)
07-04-2002, 11:14 PM
what engine are you using now?
sounds like you have a good fast engine
07-05-2002, 12:36 AM
I am using a brand new trx. Once you get a new one, you will see how big of a difference there is.
07-06-2002, 12:33 AM
Traxxasboss: From reading your posts on the trx 15 forum it looks like you want a new engine. Me and armand had the same problem looking for it and then i said u know what, forget it! We're not racing anyway, So i went and for 70 bucks got a new engine and now for 40 bucks a radioshack infrared temp gun. Allowed me to tune the engine at temperatures where it optimum level is supposed to be and of course besides that its new, it is truly enough power for me because the car can do donutz on the street with the new tires, this has never behaves before. DONUTS i tell you, lol.
07-08-2002, 06:48 PM
I just got my car a month or so ago. Can the stock engine really do donuts? I've tried and can't... well, actually, I was able to do it with the slicks I got... no grip at all at the parking lot, lol. But I couldn't do donuts with my proline v-rage tires.
07-08-2002, 08:21 PM
We have the aluminum tra tuned pipe so that mad ea difference, but not enough to do donuts, but really now, this new engine really rocks. We weren't running it at the optimum temperature (not even close) b/c we didn't have a temp gun so the performance was "ok" hehe, but now, the temp gun has been worth it 1000%.
07-08-2002, 08:26 PM
i might pick up a temp gun to tune my engine cause i just fixed the thing so if i were to buy a temp gun how would i go about tuning my engine while aplying its principals.
07-08-2002, 09:19 PM
don't get your self worked up
07-09-2002, 02:38 AM
paintballtommy: Well, the goal is to make sure you engine is running great. This means the performance is consistent, the sound is right, and it's at a safe temperature range. Now the reason this temp gun was very helpful for me was for the safe temeperature range as i have said earlier. Tune the car just like the manual says. Take the manual with you when you drive the car and read 10 times. If you are say tuning the hi-speed needle (which affects general performance greatly) and without knowing the temperature. You may think your car is running SUPER GREAT but who knows maybe it is over 30° :eek: The engine wont last very long. It is an AID and only an aid to tuning, it helps a lot. But through experience, you can tell when your engine is running the way it should and if something is not consistent. Tuning while frequently checking your temperature helps you not go overboard, but remember it's an aid. If your hi-speed needle was set fine and you start leaning the low-speed, more and more, and you think it's great, you cant tell you have leaned it too much for the engine to get enough lubrication at the LOW-speeds where temperatures aren't the highest. Other signs come into play in this case. So anyway... things like that.
finally the forums r working.
gotnitro430: don't get yourself worked up? this entire hobby is obsessive. what are you talking about, lol ;)
07-09-2002, 08:50 AM
I feel that a temp gauge is for those who don't know how to tune an engine. I have been tuning engines for 3 years now with out a temp gauge all with great results. you have to learn how to "read" the engine. Let it get up to operating temperature and see how it reacts. If it bogs on the take off then it's too rich, if it has good take off and stalls when you let off the gas-not applying brake- then it is too lean, If it wants to stall on top end richen it up etc. Always look for the blue smoke, you should atleast see some.
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