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Im looking to keep the same 8600rpm as I had in the old B18/Vtec.... I have heard about how delicate the sleeves are in the B20 but I need to see if it's still making power at those rpm's and where the torque curve is ! Its a real unknown for me with this build !!!Quote:
Originally Posted by spetz
Anything thoughts you can share are most welcome if you have first hand experiance on this kind of build.
mate, i built my B20 with 84.5 CP pistons at 12.5:1 and it has over 17'000km and seen plenty of VTEC,
i think the sleeves are fine unless you have knock...
i am rebuilding the head soon (stripped sparkplug thread - doh!!), and have removed the blocked flex pipe from the exhaust, so will be probably be pushing over 165kW on next dyno tune...
Great to hear about your build and experiances with your B20Vtec.... Any chance of getting some ideas on what I can expect from my setup ?Quote:
Originally Posted by tinkerbell
hmmm, with the scant information you have provided, between 145 and 170kW? :confused:Quote:
Originally Posted by gbpracing
Ok here's a breif breakdown of the engine build....Quote:
Originally Posted by tinkerbell
B20 block with 85mm Super tech forged 12:86:1 comp, Carillo H beam rods, 3.5 kg flywheel with 7.25" Tilton hydro concentric twin plate clutch, Crank is knife edged hardened and balanced with all clutch and f/w. B16A full race ported head with 285cfm @ .500", 34mm Intake valve 29mm exhaust valves. Toda C2 Cams , Intake 260 deg @ 1.0mm, 12.5 lift, Exhaust 255 deg @ 1.0mm, 12.5 lift
Toda 4-2-1- race headers, 4x 48mm throttle bodies, Autronic engine management system. Using 105 race fuel. 450cc injectors, Bosch VL turbo Motorsport HP Fuel pump,Sard fuel pressure regulator,
If thats not enough info let me know what you need to know !
how does the race fuel come?from pump or drums?Quote:
Originally Posted by gbpracing
VL pump necessary?
85mm is the limit of the sleeve?
Last time I checked, race fuel comes in drums !!!Quote:
Originally Posted by ericl33
I dont see any issues using this pump, whats your point here ?
Not sure is you are asking a question or making a statement !!!!!
based on my amazing "head dyno" i think you should reach your target output whilst being reliable...Quote:
Originally Posted by gbpracing
probly wont need to go much past 8600 to get there either...
My engine builder went 1mm bigger on valves...Quote:
Originally Posted by tinkerbell
Some of your questions I dont have the info, will need to ask builder.
I do have a fuel , surge tank and also an oil accumulator..
Quote:
Originally Posted by gbpracing
my b20vtec has done around 27,000 kms, it even has turbo kms on it!!. Yes the sleeves are thin, spend the money on tuning and you'll be fine.
1 - thanks, didn't knowQuote:
Originally Posted by gbpracing
2 - was wondering if it is overkill?
3 - is a question.
:)
LOLQuote:
Originally Posted by ericl33
The car is for fulltime track and needs to last as long as the last engine build, that being 10 years,,,