Hey everyone, if you really need good answers on GRP.. ask Adam Drake in the "Drake talks about new 8ight 2.0" I got alot of help and answer from him.. somebody in this thread said that theres no way it runs 250 degrees.. well read it in there.. adam typed it out! it does run at 250 at first after breakin.. it cools down after a few tanks.

Anyhow.. thats where i got most of the answers i needed..

YOUR WELCOME GRP FANS!

the grp is great I can not ask for more the power is smooth and the wear is good to. I have about 2 gallons and no sign of a bearing going out or anything. And the runtime is great to i almost can get 10 minutes (on a .21)

yeah im getting addicited to this motor over Vspecs.. but Vspec is easy to tune though.

I know this is hard without physically inspecting the engine but im Looking for a diagnosis on the condition and life left in my engine.

I broke the engine in to the best of my limited ability(only my 3rd engine.) using the heat cycle method and basically for the first 4 ltrs a heat gun was used before starting and the engine was never started cold. Its sitting at 2 1/2 gallons now, it has almost no mechanical pinch with the plug out... there is a slight resistance. With the plug in the engine has compression and is hard to turn over. The engine still runs really well, both high and low end are still there. And it holds a tune perfectly and the temp never gets out of control.

So im worried about it having almost no pinch with the plug out, but it still runs very well? How much life is left in the engine?

And is it worth getting it modded, im tempted after seeing this thread: http://www.rctech.net/forum/nitro-of...ore-after.html.

Anyways cheers for any advice.

Jonro...Do not worry about it. I've seen GRP's and Vspecs with little pinch run for several gallons. Start worrying about it when it either will not idle well or loses tune consistently...Sounds like you broke it in right. That engine should last you a while. Good luck..Scott

What is the obsession with mechanical pinch, an engine needs compression to run not pinch. If it has compression with the plug in and it runs well then all is good. If your engine has mechanical pinch than it is still not run in.

Yea your absolutely right about the pinch. I just got back from a bash where i put 7 more tanks through it, and even though the engine has little metal pinch, the engine ran flawlessly. And i forgot to add that Ive got this engine idling so low and stable that i don't know how it stays running, heh.

Cheers for the reply's.

P.S. And good luck with that sig Sam-E :P

I understand the pipe that comes with the promo kit is too restrictive. I've actually got a 053 pipe laying around. Will that make good power or should I pick up a better pipe? I want to get the right pipe up front.

the 9853/053 pipes work really good on the grp, works best with short manifold

The Grp pipe works the best smoothe power

A couple more newb questions:

The 9853 and 053 are basically the same pipe?

How do I know if I've got the short manifold? My manifold is sort of angular, not a round sweep.


thanks for the help


Steve

053 is just a copy of 9853, most of the time the pipe comes with the short or medium manifold, either one will work well

I think the 2053 pipe works the best of the GRP pipes and I like the short/round header the best. It's hard to tell which length the header is unless you have a different length GRP header to compare it to. GRP changed the radius of the tube between where it connects to the engine and the pipe, so you can eyeball it or use a piece of string or somethign to check the length. They did it so when you chaneg the header length the pipe's position stays the same and you do not have to cut a lonegr hole in your body for the pipe stinger.

By all means I am not saying you are wrong. I did not have time to read through the entire thread, but I think Adam said it's ok that your engine ran 210 degrees when you asked him.

I have had the chance to race with adam and test several times in preperation for the worlds. He showed me some very valuable information that has helped me since running the GRP .21.

When breaking in my engines( I have 4) none of them have ever reached 250 and when tuned properly will not run much over 200 degrees. The most I have ever seen Adams run temp wise is about 210...maybe. I would think running it at 250 might come at the expense of the engine life. If you race with Adam or in his area let him look at it and he will put you on track. Once you see him tune, it is very easy to replicate.

Again, I may have missed where he told you that.

Take care.

I just got my GRP engine toolkit yesterday. If anyone has a used up GRP motor, or a motor that needs bearings, i might want it.