Hi. I plan on building a gsr bottom end within the next 6 months, and was wondering how reliable this bottom end is keeping its factory rod/stroke ratio. Also, the rod/stroke ratio isn't changed when upgrading to aftermarket rods/pistons as long as the rods are the same length and the pistons have the same mounting heigth, correct? I would like the bottom end to be stable at around 9200, as I will be possibly running Toda C's as well.

Thanks in advance.

 

1.58 is the rs ratio on a b18c1 bottom end, the block gridle is one of the many thing that help keep it together, 9200 is gonna kill the longevity of your engine anyway, the higher you rev, the shorter it's gonna last, proven time and time again...the main q I/WE have is what purpose will this engine serve...autocross, 1/4 mile, daily grind, a little info may help us give you better suggestions depending on what you want.

 

Actually, a little of everything. Right now it's daily driven and a weekend drag racer. Eventually I would like to get into recreational road racing. The setup I had planned were eagle rods and some sort of 12.5:1 pistons.

 

Erick's Racing has run their B18c1 to 10k+ rpms.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unsung EM1 &raquo;</TD></TR><TR><TD CLASS="quote">Hi. I plan on building a gsr bottom end within the next 6 months, and was wondering how reliable this bottom end is keeping its factory rod/stroke ratio. Also, the rod/stroke ratio isn't changed when upgrading to aftermarket rods/pistons as long as the rods are the same length and the pistons have the same mounting heigth, correct? I would like the bottom end to be stable at around 9200, as I will be possibly running Toda C's as well.

Thanks in advance.</TD></TR></TABLE>

This bottom end should be pretty reliable for you as long as you do keep the factory rod ratio. Yes you are correct. The rod ratio will not be changed as long a you do not change the length of the rod .

Edit: Doh ! Remind me not to post late at night...




Modified by allmotorgurl at 1:50 PM 5/31/2003

 

You can change your piston pin height if you want but the only way to change your rod/stroke ratio is to change the length of your rod or your stroke.

9200 is turning a GSR bottom end pretty hard

 

Balence polished crank, Probe ultra lights and JE's, Balenced and Blueprinted, new bearings, thrust washers and seals, mild B16A head w/ full valvetrain. Fuel cut off @ 9,600rpm. 19months strong. This is in a friends car.