GRP untuned .21
#1
GRP untuned .21
I just picked up a untuned GRP for a great price NIB. Well I ran Nitrotane fuel and now ended up with a bad engine bearing. I was actually told not to use this fuel because it does this.
After I fix the bearing I wanted to know if i can run 20% with the current head shim? I know they come ready to run 30%, but the track I race on is small and you don't really need all that extra power running 30%. Any help would be great thanks!!
After I fix the bearing I wanted to know if i can run 20% with the current head shim? I know they come ready to run 30%, but the track I race on is small and you don't really need all that extra power running 30%. Any help would be great thanks!!
#2
I just picked up a untuned GRP for a great price NIB. Well I ran Nitrotane fuel and now ended up with a bad engine bearing. I was actually told not to use this fuel because it does this.
After I fix the bearing I wanted to know if i can run 20% with the current head shim? I know they come ready to run 30%, but the track I race on is small and you don't really need all that extra power running 30%. Any help would be great thanks!!
After I fix the bearing I wanted to know if i can run 20% with the current head shim? I know they come ready to run 30%, but the track I race on is small and you don't really need all that extra power running 30%. Any help would be great thanks!!
If it's ready to run for 30% nitro, then it has an extra shim in it (or one thicker one). You don't need that extra shim for 20%, but it won't hurt anything.
I keep the extra shim in my engines and all I use is 20%. From what I've read here, a little extra shimming extends engine life at the expense of a little power loss. Maybe someone else will chime in and confirm that, though.
#4
I just started it up this morning after the rebuild and it runs great. No more sheering(sp) or anything. Im running a few tanks in "break-in" settings for the new fuel. I went with Trinity 25%. Ive never had any issues with it.
I really wanted to use the Nitrotane. I was actually just about to switch over my V-spec until that happened with my GRP. I don't know if it was the fuel or not, but anyone who got the fuel from the shop has blown one of their bearings. Its been about 5-6 guys now with the same issue.
#5
I really wanted to use the Nitrotane. I was actually just about to switch over my V-spec until that happened with my GRP. I don't know if it was the fuel or not, but anyone who got the fuel from the shop has blown one of their bearings. Its been about 5-6 guys now with the same issue.
A similar thing happened with Sidewinder fuel. There was a bad batch that affected quite a few people, but it wasn't a bearing problem.
I don't remember if it damaged engines. I do know that people bought new engines because they assumed their engines were shot. It took a while before it was traced down to a bad batch of fuel.
#6
Had same problem with sidewinder. bad fuel