I'm building an all motor B20 set up. I am going to be running a P8R head with crower 403's. I was wondering if the LS valve springs would be ok to run? and also I am going to be running the B20Z pistons in my B20B which is upping the compression from 8.8 to 9.6, do you think this is enough compression to make at least some kind of power from the 403's. If someone could help me out it would be greatly appreciated.

 

johnson, dont be a puss. just get the dual valve springs and retainers so you can rev the **** out of it...not really, but just get em anyways.

 

no ls springs willl be no good you need the kit from crower and i dont think the b20z pistons are gonna be enough to really give those cams the compression they need to make power look into b20z pistons with a thinner head gasket and a milled head

 

I'm pretty sure they don't make thinner head gaskets for the B20 if anyone else knows otherwise let me know. thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sketchaholic &raquo;</TD></TR><TR><TD CLASS="quote">I'm pretty sure they don't make thinner head gaskets for the B20 if anyone else knows otherwise let me know. thanks</TD></TR></TABLE>

They dont! THe onlt thing that you can do is get an OEM gasket and remove the middle layer. I dont recommend that though. I say ditch the B20Z piston idea and go with an after market set like the 11.4:1 endyne rollerwaves.

Also with the B20, I recommend 404's since it is a bigger motor than the B18.

 

will it matter if I use the crower valve springs and retainers on the p8r head, because of the different valve size?

 

what kind of rods would you suggest on those endyne rollerwaves, would you ever consider using stock?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sketchaholic &raquo;</TD></TR><TR><TD CLASS="quote">will it matter if I use the crower valve springs and retainers on the p8r head, because of the different valve size?</TD></TR></TABLE>

No, use the Crower pieces.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sketchaholic &raquo;</TD></TR><TR><TD CLASS="quote">what kind of rods would you suggest on those endyne rollerwaves, would you ever consider using stock?</TD></TR></TABLE>

You can use stock. I recommend having them shotpeened and ARP 8m rod bolts pressed in.

 

remember to let Crower knwo you have a P8R head, the retainers are different than an LS

 

I have the crower valve spring kit on my P8R and Nothing is different? I ordered the LS package.

 

I wouldn't rev the **** out of that motor. LS rockers are not shaft mounted like they are in a BVTEC head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Darkane &raquo;</TD></TR><TR><TD CLASS="quote">I have the crower valve spring kit on my P8R and Nothing is different? I ordered the LS package. </TD></TR></TABLE>

i've read in a few places that the lower retainers are different. and using ones for on LS/B20 could cause the springs to bind

 

hmmm....

 

I went 11,000KMs with this set up so about 6.6k Miles and not one problem. I pulled the motor and sold the car. But i never had bind. On the dyno she hit 125WHp on a mustang dyno in 3500ft Elevation with stock CR of about 8.5:1 (P8R). so it was about 170Crank HP. I could pull slightly on GSR's until 4th. So it had good power never got to rebuilding the bottom doh! Good luck

 

Does anybody have a non vtec B20 set up with 404's with a p8r head, and endyne rollerwaves 11.4:1?

 

check out nonvtec.com, there is a setup and dyno thread in the B-series Allmotor forum.

As soon as I find a B20 block I will be going to a similiar setup or may even up to the 405-2's

 

damn sucka...haha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't rev the **** out of that motor. LS rockers are not shaft mounted like they are in a BVTEC head.</TD></TR></TABLE>


Well if you have the valvetrain and cams to make power high, how high would you be able to rev a ls motor safely?

 

The very few that make power over 9K, I would feel unsafe going that high. 8K-8.5K is the max I would comfortably go, pending that the motor has the components necessary to rev that high.

 

Would it be safe to take it up to 8k if you have arp rod bolts and the valvetrain to support it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jdmcivichb! &raquo;</TD></TR><TR><TD CLASS="quote">Would it be safe to take it up to 8k if you have arp rod bolts and the valvetrain to support it?</TD></TR></TABLE>

Yes

 

Thanks for the info

 

its the rockers themselves poping out you have to worry about (what rocket was refering to)

dont look for much over 8k

anyway why dont you just send me the p8r head and ill dyno it for you so you can see if its worth it or not hehe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sketchaholic &raquo;</TD></TR><TR><TD CLASS="quote">Does anybody have a non vtec B20 set up with 404's with a p8r head, and endyne rollerwaves 11.4:1? </TD></TR></TABLE>

this is basically what i plan on doin, get a p8r head put in some aftermarket pistons 11.5:1 or so.... i already have the 404,s in my b20z now with rocket springs