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View Full Version : will i need a heavy duty rod


dirty habits400
10-22-2003, 07:38 PM
i was thinking bout ordering the sparks 416 kits with the 12;5;1but will i need a\the heavy duty rod since it will a high comp. thanks
dirty habits400
10-22-2003, 08:16 PM
anyone know . .bump. .
UglyMotha™
10-23-2003, 07:48 AM
you really don't need one but if you got the money and are more than willing to spend it then i would get one you can never be too safe
10-23-2003, 07:49 AM
I'd get one just to be safe. I've read on here several times of members with that comp. or higher blow the stock rod. If i went that high I would most def. get a new rod..:macho
Silverfox@C&DRacing
10-23-2003, 08:44 AM
With that kind of compression I would replace the rod if you were staying around 11:1 I would say leave the stock rod.
dirty habits400
10-23-2003, 05:05 PM
thanks for your guys/girls help
dirty habits400
10-23-2003, 05:19 PM
now i am thinking will ther be a big differnce between the spraks 416kit and a regular 416kit with je piston 11:1 and i will have a hot cam stg 2 and port&polish with the fcr39mm and also will i need the heavy duty studs for 11:1 i ride mostly with piped raptors and i wanna beat them if not stay even with them thanks for ur help
Bill Fuller
10-23-2003, 05:33 PM
Don't go with anything higher than 11:1 or you will HAVE to run race gas.I would stick with a JE or Ross piston.With the port and polish and the FCR carb you will be fine against them Craptors:D I would recommend stepping up to a Hinson clutch basket for the extra abuse,stock clutch plates will work fine and are less costly.If you stay under 11:1 than you will not need the heavy duty studs.
dirty habits400
10-23-2003, 05:43 PM
what if i get the 11:1 with the thin gasket then will i need the heavy studs and also it will be no problem for me to run race gas
Bill Fuller
10-23-2003, 05:50 PM
If you go with the thin gaskets than you will be bumping up the compression,so I would suggest that you go with the heavy duty studs.
stupid driver
10-24-2003, 06:19 AM
mine ate gaskets right and left till i put HD studs on. Very good mod if you ask me, the reliability of the machine goes way up. A machine shop installed mine for pretty cheap
YZROOSTINYA
10-24-2003, 09:46 AM
I am running 10.8:1 and I need to mix race.

I would suggest a aftermarket rod for anything over 11:1

Just my opinion. That is alot of compression on a motor that is originally 9.1:1

9.5:1 for XR400