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itr b20vtec all motor DD

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Old Apr 14, 2011 | 02:36 PM
  #1  
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Default itr b20vtec all motor.... sk2 pro1 cams fail

here is my friend 98 dc2 Type R b20vtec

b20z block
p72 22T water pump
p72 oil pump
p72 timing belt
oem honda bearings
darton sleeves
rs machines 84,5 pistons
eagle rods
arp head studs
pr3 unported head
supertech valvtrain
sk2 pro1 cams
titek cam gears
fidanza flywheel
itr intake manifold
itr TB (70mm incoming)
blox termal gasket
rc550 injectors
competiton clutch stage4
itr s80 tranny
4:1 2,5 crapy header
2.25 exhaust (will be replaced for a 3' ex)
obd1 p30 ecu tuned on crome pro

car made 23xhp
159tQ

here is the video on dyno
[youtube]pLMJVFySM_k[/youtube]













Last edited by flavio; May 29, 2011 at 08:39 AM.
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Old Apr 14, 2011 | 05:35 PM
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Default Re: itr b20vtec all motor DD



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Old Apr 14, 2011 | 09:00 PM
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Default Re: itr b20vtec all motor DD

Why you would do all that work and stay with a stock port head, I dunno.

That build needs some headwork, a good header & exhaust system, and more aggressive cams!
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Old Apr 14, 2011 | 09:14 PM
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Default Re: itr b20vtec all motor DD

5th gear pull? Wow! haha good job guys
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Old Apr 15, 2011 | 08:32 AM
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Default Re: itr b20vtec all motor DD

nice numbers?
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Old Apr 15, 2011 | 08:36 AM
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Default Re: itr b20vtec all motor DD

Why did you go with cast pistons? out of curiosity. Seems like everything else is a bit over done and then boof you have cast pistons on forged rods and darton sleeves. also any dyno sheets? nice car by the way!
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Old Apr 15, 2011 | 01:28 PM
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Default Re: itr b20vtec all motor DD

Originally Posted by C_Rock77
Why you would do all that work and stay with a stock port head, I dunno.

That build needs some headwork, a good header & exhaust system, and more aggressive cams!
in the future my friend!! here in portugal it doesent have anyone to port a head on cnc :/


the cast pistons it's the first purchase of this project and the initial project its a cheapest build on stock sleeves rods ....

tks for the coments

hytech replica big tube on that setup it's fine right? w/ a 3' ex
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Old Apr 16, 2011 | 12:58 PM
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Default Re: itr b20vtec all motor DD

http://www.youtube.com/watch?v=YolkYMkbAGs
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Old Apr 19, 2011 | 05:47 PM
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Default Re: itr b20vtec all motor DD

that thing moves !
good work guys
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Old Apr 20, 2011 | 02:56 PM
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Default Re: itr b20vtec all motor DD

wow, that thing flies.. I can only imagine it with headwork, bigger cams and a better exhaust. Good stuff guys!
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Old Apr 20, 2011 | 03:47 PM
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Default Re: itr b20vtec all motor DD

dam thats some good power for a **** header/exhaust man. nice job
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Old Apr 20, 2011 | 04:55 PM
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Default Re: itr b20vtec all motor DD

Um NASTY.
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Old Apr 20, 2011 | 04:59 PM
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Default Re: itr b20vtec all motor DD

That THING is SCREAMING for a big set of cams.. ..honestly.. that's no joke..kind of seems to pull just as hard as mine and that's pretty nasty for being so under cammed and having a crappy exhaust.. i think those numbers are slightly high.. a track mph would be more indicative i believe of power..

Big props for doing it on CromePRO too...
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Old Apr 20, 2011 | 07:49 PM
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Default Re: itr b20vtec all motor DD

Thing pulls great
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Old Apr 20, 2011 | 08:45 PM
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Default Re: itr b20vtec all motor DD

Originally Posted by flavio
in the future my friend!! here in portugal it doesent have anyone to port a head on cnc :/

hytech replica big tube on that setup it's fine right? w/ a 3' ex
Pro2 cams would be a good fit for this build.

Personally, I'd go with a Skunk2 Megapower header with a build like that over the Big Tube Hytech replica.

3" exhaust is exactly what you want on this setup!
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Old Apr 22, 2011 | 08:29 AM
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Default Re: itr b20vtec all motor DD

for sure...the build it's just in the beginning
need
3' ex
3' intake
70mm TB
a decent header
one day maybe the change for the pro2

track times maybe in next mont :D
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Old May 29, 2011 | 08:23 AM
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Default Re: itr b20vtec all motor DD

problems w/ sk2 pro1 cams
exhaust cam broked
and eat the rockers


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Old May 29, 2011 | 08:27 AM
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Default Re: itr b20vtec all motor... ak2 pro1 cams fail

what camshafts did you chose for that setup?
sk2 is out off the way

Last edited by flavio; May 29, 2011 at 08:46 AM.
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Old May 29, 2011 | 08:56 AM
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Default Re: itr b20vtec all motor DD

I'd contact Brian @ Skunk2 first and see if you can have the problem fixed. That's very, very rare, indeed. Make sure you're following their specific guidelines of install too. But before choosing another cam to retune, contact Skunk2 first before you consider it out of the way.
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Old May 29, 2011 | 09:07 AM
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Default Re: itr b20vtec all motor DD

Ive seen aftermarket camshafts gobble up the Vtec rockers many times. I was told this is because the rockers are a "match set" to the camshafts. They were in much like a clutch/pp wear to a set. That would mean anytime you changed cams, you would need to change rockers too which would be quite pricey. Im not sure I support this theory much either.
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Old May 29, 2011 | 09:07 AM
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Default Re: itr b20vtec all motor DD

Motor ok?..


As long as a cam is made of a matching material, eating rocker arms shouldn't happen.skunk2 in the beginning of the pro series has problems with eating rocket arms, how old are those pro1 cams? Valvelash and valvetrain play a roll in "eating" rocker arms as well.
Sorry the cam broke, skunk2 should be able to take care of you. Contact brian he's the man.

*waits*
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Old May 29, 2011 | 09:14 AM
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Default Re: itr b20vtec all motor DD

Originally Posted by TheShodan
I'd contact Brian @ Skunk2 first and see if you can have the problem fixed. That's very, very rare, indeed. Make sure you're following their specific guidelines of install too. But before choosing another cam to retune, contact Skunk2 first before you consider it out of the way.
+1... Not to throw you under the bus, but this is the first I have EVER heard of a Skunk2 Cam failing in such a way. Might want to double check Skunk2's install and degree'ing procedures...


EDIT: +1 for valvelash... was this ever adjusted/reset after the build?? was your installed height (valve/spring) ever measured??
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Old May 29, 2011 | 09:16 AM
  #23  
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Default Re: itr b20vtec all motor DD

only 2 bented valves but the head & block was allright

it's not the first time i see sk2 cams eating the rockers
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Old May 29, 2011 | 09:17 AM
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Default Re: itr b20vtec all motor DD

Originally Posted by SpokaneSpeed
+1... Not to throw you under the bus, but this is the first I have EVER heard of a Skunk2 Cam failing in such a way. Might want to double check Skunk2's install and degree'ing procedures...


EDIT: +1 for valvelash... was this ever adjusted/reset after the build?? was your installed height (valve/spring) ever measured??
Plenty cams break, could be a lot of things. Skunk2 has delt with their fair share of cams breaking.
I'm thinking the motor might have been slightly over revved , install height probably wasn't what it should have been and the valve lash was probably too tight.
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Old May 29, 2011 | 09:18 AM
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Default Re: itr b20vtec all motor DD

Originally Posted by flavio
only 2 bented valves but the head & block was allright

it's not the first time i see sk2 cams eating the rockers
Thats good, glad the motor is ok.
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