reliable high comp b20???


DarkEk4

DarkEk4

New Member
Joined
Feb 16, 2008
Messages
50
whats needed to be done to a b20 block for it to rev as high as 9,000rpm

this is what im looking at!

B20B/z block
b16a Head
Cams RocketMotorsport M24x/m22xx
Golden eagle adjustable cam gear
RM Valves springs and Titanium retainers
CP pistons 12,5:1, 85,5bore
Eagle rods
ACL race bearings
Bloc guard golden eagle
Cometic head gasket 0,40
ARP studs
Golden eagle maingirdle

anything else that i should add?

will this be a reliable build? thatl rev to 9000rpm with no problems?

thanks alot:nice:
 
That sounds alright to me but i stil wouldn't be taking it that far...

Maybe 8k will be a safer limit or 8.5k max.... The b20 is a bit more lazy power if you like so shouldn't need to rev it that high....

Fair play if you do build a reliable 9k b20:bow:

I did find this i though, some thing to think about

"If you keep the 8000 rpm redline

your piston speeds go from

77.4 mm 8000 RPM 20.6 meters/sec

to

89.0 mm 8000 RPM 23.7 m/s

which is the equivelant of running a stock b16 to 9100 rpm

9000 RPM 23.2 m/s

which is why people have problems with there b20's especially since the majority of the b20b blocks were never meant to exceed 6750 rpm."


"Stock B20s should not be revved like a B16A. Their rods are weaker, the rod bolts are much weaker, their stroke is longer, and their rods are short. All of which are BAD for revving.

Here are my REV suggestions for a B18/B20 bottom end.

Completely stock – 7500rpm (Rods bolts will stretch any high and you might get piston to valve contact)
Add ARP rod bolts – 8500 rpm (Rods are definitely at their limits)
Aftermarket Rods – 9000+ rpm (You can run higher, but you won’t make anymore power in most configurations so why bother)"
 
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nice1 m8! yeh thats true prob wouldnt make much power up tha high anyway! just setting the standards further so i no it will be safe!

its either that or to build a b18! swap blocks from my b16a to b18c and build that! its just you can get so much more out of the 2.0ltr!

hows ur b18c? i read uv done a swap, how does it compare to the b16a?

cheers
 
Fantastic mate. can't compare to a b20 but i love it. AND THE REVS!!!

Highly recommended.

B18 build with higher lift cams and some more tweaks is my dream....

But it is plenty fast enough.
 
great points ijwhiteman, you took the words out of my mouth, all parts seem good, i would advice AGAINST the use of a blockguard, there is simply no need. If you really want to use a blockguard make sure it is pressed in and then you bore&hone...

Assembly is going to be the most important part, make sure you have it done by a competent place...
 
appreciated ijwhiteman n1!

so that build minus the block guard will be plenty strong enough for a high comp build? will i have any problems with the sleeves on the b20 cracking with the high comp needed for the m24x's?

sleevings out of the question, just to damn expensive!

its my daily drive so i need it to be reliable!

cheers
 
If you are going ahead with the build. Try and get a B20Z block as they are a stronger block than the B20b.
 
yeh ite cheers m8!

i dno whether to build a b20 or to build a b18c! would there be much differences in performance compared to a fully build b20 nd a fully built b18c?

b18c would probly be much cheaper and has no problems with high reving and still being reliable!
 
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