Originally Posted by
Toiffel
Well today I broke out the GRP after the case on my Vspec cracked. I had broken in the GRP on a bench, and had it in my pit bag ready to go-pipe-clutch-already installed, ran 1 qualifier and a 20 minute main.
Running a JP3 pipe had 1/2 a talk after 5 minute quali, impressed how smooth the engine is, yes doesn't scream like the others but has power where it counts, maybe still hasn't completly broken in, but compared to my EB Mod Vspec doesn't have the same top end, nevertheless still very pleased, going to try the GRP pipe 2053, maybe I can gain a little more top speed. Temps consistent 189, nice trail of smoke, idled forever, only change I made is went to a GRP4 instead of the 6 I broke it in with......time will tell...(I got 8 gal on my VSpec).
my grp has excellent low&mid with little top end missing with 053. has been at 190degrees since the 1st start during breakin. with just under a gallon i dont think the top end will open up more for me but im still happy with it. vspecs seem to get better top end than other 5ports iv ran, at least from my experience.