Help!!! Rocker arm jumping/breaking

A

Anonymous

Guest
Hello,
I need advise guys... I completely modified my R. At 1.0bar i have 400hp, at 1.4 - 480hp. There are no problems on the dyno I can rev it to 7700rpm and nothing is happening, but when I go on street rocker arm of 2 or 3 cyl always jumps of - this timr it caused bent valve. Please give me advise where it is the problem. Mods in the head are Tomei camshafts intake 270/lift 12.5 exhaust 280/lift 12.5. Do you think for this cams I need springs, retainers as far as Tomei told me it is not necessary.
Please give me some advise...

Regards,
Tadas
1bar=400hp
1.4=480hp
R
 
J

jiw

Guest
Do you have a set of rocker arm stopper's?? also are your valve clearences correct? jeff
 
A

Anonymous

Guest
rockers

No, i do not have set of rocker arm stopper - where I can get those?
Valve clearence is OK

Regards,
Tadas
 
J

jiw

Guest
their has just been a set on ebay, i'll have a look around, has your factory rev limiter been removed?
 
A

Anonymous

Guest
full specs

Hi,

1bar = 400hp/480NM
1.4bar = 480hp/535NM

Specs:
Custom made pistons 1mm oversize
Tomei Camshafts 270in/280ex
DPR Europe/GroundZerO ported head
DPR Europe/GroundZerO ported manifold and throttle body
DPR Europe/GroundZerO intercooler
Hestec Engine management system
Hestec 850cc injectors
Walbro 255HP fuel pump
Holset turbocharger (do not remember model, but it is HUGE!!!:)))
DPR Europe/GroundZerO exhaust manifold
DPR Europe/GroundZerO exhaust system
Greddy Racing Pro spark plugs
RCI fuel cell
Sard Blow Off Valve
Audi S2 Wastegate
as far as I can remember everything else is stock...

Regards,
Tadas Ivanauskas
Director
GTR Jointstock company/GroundZerO
www.groundzero.lt
tadas@groundzero.lt; info@groundzero.lt
+37067622444
 
A

Anonymous

Guest
More...

Acvtually engine was built for 2.0-2.5bar of boost also i have NOS system installed with 150hp shot (never USED), but... i missed this FU@#$ problem with rockers... Can somebody tell me the Greddy code for Rocker Arm stopper as far as on their website I found this part only for cars with hidrulic valve lifters not shims...

Regards,
Tadas
 
You must log in or register to reply here.
Top