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b20b or b18c1

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Old Apr 4, 2006 | 04:39 PM
  #21  
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Default Re: b20b or b18c1

Ive been around a few turbo cars and i would pesonally build a sleeved b16 they are cheap and they take a beating. Leave the crank alone there is no need to mess with a honda crank except maybe a polish. I recomend a eagle rod for up to 500hp pic a piston je/weisco/cp/arais they will all work fine You can make alot of power on a stock port head just make shure you have a good valve job tell who ever does the head to put a type r style job on it with a 1mm over intake valve add some valve train and bam your done. Okay now here is the important part buy a good turbo gt35r sc61 something along those lines no cheap ebay crap buy a decent intercooler and manifold again no ebay crap then have it tuned very very inportaint oh ya most companys will not sleeve b20 blocks
Old Apr 4, 2006 | 06:04 PM
  #22  
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Default Re: b20b or b18c1

Originally Posted by Yell88CRXsi
LMFAO...jump my nuts...I've never been accused of doing that!

I totally agree about boring on a stock B20 sleeve no matter how minimal. You just don't chance some things!
Both the B18a/b & B20's have a 212mm deck height versus the 211mm of the B18C's. This is not so much a big deal, unless you are custom building and looking for every millimeter possible. I wouldn't say that the B20 block are crap. But I will argee that in their stock form the B20's are not a good as a B18C+ block.
In some motors oil squirters are not necessary if the pistons skirts are coated. No oil squirters...or capped off oil squirters, are usually seen in pro drag motors to keep oil pressure up and to keep oil which equals weight...off the bottoms of the pistons and rods.

Once again I will agree that the head does cause engine failures with floating valves at high rpms or poorly built engines with high compression and big lobe cams that were not properly installed. However, a lot...and I will repeat...alot of B18a/b and B20's failures come from that fact that the bottom ends fail because of the OEM rods snapping at high rpm's due to the faster piston speed of the 1.54 rod ratio where the rod snaps because of the inertia of the piston during the transition from the upward motion to a downward motion while at TDC. Forged rods are the only way to go when dealing with a high reving motor.

Lightening a crank should only be done by a machine shop and more importantly...someone who knows hondas!!! If the motor is done right, then there will be no twisting of the crank. Remember that building a motor is about matching this to that...or, for every cause, there is an effect. This means that using the big dick theory where "bigger is better" does not always work with building engines like it does with it does with your girlfriend
As far as titanium rods goes...be careful. Titanium rods are dashit but are very expensive and if not installed correctly can cause severe galling on the crank. Do not think for a second that ti rods are plug and play like off the shelf forged rods.

Hope I did jump to hard

lol you lil nut jumper.... just saying i didnt want to step on your toes cause you made alot of valid points.

in no way to i condone the use of stock rods in a built motor. or a high rpm motor. generally you tear the rod cap off due to shitty little bolts not being up to the task. but yes ive snapped a many right in the middle of the beam. hp doesnt tend to break rods like rpm does. thats alot of inertia and they do have to come to a complete stop and change direction every stroke.

forged rods are definately the answer to this problem, but the point i was more trying to make is lightening the crank, and increasing rod mass is a bad combo. in my personal opinion an inline 4 should never have a lightened crank, not even knife edged. there are better ways to control oil than knife edging the crank. and yes thats what its there for, to cut through the coagulated mist in the crank case. lightening the counter weight puts all the weight to one side of the crank.. the rod journal. 4 cylinders {except for the odd fire cosworth} are 2 up 2 down, not every 90 degrees. so the balance of the crank is all effed up anyways.. just inherent in the design. this is why most inline 4's over 2.0 liters have balance shafts. to cancel out the nasty vibration you feel in ur butt at idle because there is not a damn thing anyone can do about it. most pro engine builders dont even bother balancing a i4 crank... you can weight match the pistons and rods. which is often called balancing. but rarely is the crank spun, drilled/or weighted with mallory to try and get it "in balance" because you cant.

piston squirters is a whole nother ball of wax... sure drag motors eliminate them. but were talking about a street car here. on drag engines they fill the blocks with concrete and only cool the heads. but whats that gotta do with the price of tea in china. squirters help keep the domes cool, to minimize detonation and melting the piston during prolonged sessions of abuse {road race, highway races, running from the cops for 52 miles etc.}

as for ti rods galling the crank... eh thats kinda retarded. if your rod ever comes in contact with the crank you have some SERIOUS issues. like it just spit the rod bearing out the motor. any rod, chromoly, ti, tissue paper whatever will gall the crank if it touches it. we run ti rods in our gt3 engines {single cam ka24, 290ish at the crank} spin 8000 thousand or so rpm for hours at a time. and amazingly enough have no issues... but when something does go wrong you can guarantee both the rods and crank get trashed.

and to make this post yet a little longer... people always preach rod ratio. which is funny cause no one ever said shit till the great "endyne" starting talking about rs ratio and the "perfect" 1.75. i believe what it really boils down to is rod angle and side loading that breaks rods as you transition from going down to going up and vice versa. rs ratio is just a nifty catch phrase of the times.


not that i know anything, these are just my opinions.
Old Apr 4, 2006 | 06:22 PM
  #23  
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Default Re: b20b or b18c1

while i was in the shower just now something clicked..

yellow88 if you are who i think you are, i actually did the machine work to your engine many moons ago.
Old Apr 4, 2006 | 06:43 PM
  #24  
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Default Re: b20b or b18c1

you pussys and your rod ratios you cant spin an ls crank to 10500 maybe some of my old dyno charts are wrong

Last edited by dahatch; Apr 4, 2006 at 06:47 PM.
Old Apr 4, 2006 | 08:18 PM
  #25  
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Default Re: b20b or b18c1

lol you can spin an ls to 10k all you want... but what in the fuck did you do to your head to make power up that high?

just curious... id like to see one of those dyno sheets just to see where power peaked.
Old Apr 5, 2006 | 08:15 PM
  #26  
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Default Re: b20b or b18c1

ask seth
Old Apr 5, 2006 | 08:34 PM
  #27  
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Default Re: b20b or b18c1

http://www.we-todd-did-racing.com/we...ZkMzF5NTQx.jpgi usally shifted at 10300 thats where it ran the best
Old Apr 5, 2006 | 11:15 PM
  #28  
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Default Re: b20b or b18c1

thats pretty sweet.... youd figure after it peaked the power would fall off pretty quick, but that thing has a nice flat curve. stays well over 200 all the way out to ur redline. i bet that things fun as shit to drive

keep up the good work man.

oohh..hehe. man what cams you got in that thing? they dont even start workin till 6 grande. its gotta sound evil :-D
Old Apr 6, 2006 | 12:41 PM
  #29  
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Default Re: b20b or b18c1

Originally Posted by kawgomoo
while i was in the shower just now something clicked..

yellow88 if you are who i think you are, i actually did the machine work to your engine many moons ago.
You thinking of me in the shower really scares me

Did you work at Abacus? because they are the only ones who have ever done machine work for me...that I can think of.


Matt, I never said that you could spin a LS crank to 10k+, just that stock rods don't like it and that it's one of the main reasons B20's let go. Your motor hardly classifies as a stock motor and yes the oh "rod ratio" thingy. I get that when ever I talk about them lol. It's just something that I have come to use when building a motor. It's a two way street. Either you believe in it or you don't.

If you don't mind me asking...why would you shift after 10K when your peak power is at 8700? I mean, I can see that this is a run from 2004, so I'm quite sure that things are different. Wouldn't you want to stay in under the power cruve?
Old Apr 6, 2006 | 01:37 PM
  #30  
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Default Re: b20b or b18c1

where i shifted had alot to do with gearing and where the rpms dropped win i shifted the car whent fast when i reved it high so thats how i drove it



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