Here is my plan, any thoughts or other ideas would be appreciated, I have a b20 block 84.5mm I am looking at CP 12.5:1 pistons with everything else in the bottom end to remain stock, complete rebuild but thats it. For the head I would like to run my fully ported and polished LS head, crower dual valve springs, and crower 403's. I am wondering if this set-up will have a clearance issue (pistons hitting valves)? The reason I am doing this is to get some cheap power that will last about 250 miles of pure pounding. I race this car and the races are only about 10 mins long 15 laps on a 1/3 mile track and I will rebuild after every season. VTEC is illegal in this class or I would be doing LS/VTEC. Any other ideas would be appreciated too. Thanks Chad

 

You will not have piston to valve issues.
Ever thought of trying to modify a GSR intake manifold to fit?

It gives you a nice broad torque curve

This motor is 85mmx89mm with 11.5:1 compression and is running cams equivalent to 403's. For your application you might want to step up to the 404's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">You will not have piston to valve issues.
Ever thought of trying to modify a GSR intake manifold to fit?

It gives you a nice broad torque curve

This motor is 85mmx89mm with 11.5:1 compression and is running cams equivalent to 403's. For your application you might want to step up to the 404's.</TD></TR></TABLE>

post a pic of the flange that bolts to the head.

 

are u planning to pin fit the rods and run stock rods??...becuase i wouldnt reccomend it...it would really help u out if u got new rods ...with forged pistons and some nice rods there is no reason u would have to pull apart the motor every season should last longer then that...all depends on what ur spinning it too...

 

Wow Todd thats ****** awesome!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR.johnson &raquo;</TD></TR><TR><TD CLASS="quote">post a pic of the flange that bolts to the head. </TD></TR></TABLE>

 

thanks.

 

b19 coupe is that manifold hard to make work. im not the best at custom fabrication but that looks interesting until i can save for a vtec head. how did you make it work with the secondary butterfies

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g hatch &raquo;</TD></TR><TR><TD CLASS="quote"> how did you make it work with the secondary butterfies?</TD></TR></TABLE>
I used the VTEC output to trigger a relay that shuts off current to the IAB control valve. An added bonus was high and low speed ignition/fuel tables to play with in Hondata

 

That's cool; thanks for posting the pictures. btw, how many HP is the adobe block good for?