hey chet,

i have seen one cracked CRV block on this board.

that was due to 16psi of untuned boost.

1. how many of the cracked CRV blocks have you seen have been due to mis-shifts?

2. how many due to NOS?

3. how many were boosted?

4. how many NA?

let us know...

or dont you bother to ask you friend WHY they are cracked?

the 'import' scene (they are all imports, lol) downunder is pretty wild, mostly WRX's and GTR's, RX7's and turbo rotors...

all boosting their brains out.

not enough, nor many people play with Honda's here. i rarely see Hybrids...

havent dynoed my B20 yet, am doing so this friday...

should be interesting for a 'stock' set-up eh?

see what can be pulled with the pf3's

i was running mid 15s with a fairly stock b16a in a 1983 Prelude.

now, chet, what's your ride? oh yeah, and answer 1 to 4 above...

t..

 

PS this is a tech forum.

not a 'anything goes' he said/she said forum.

unless it happened to you - or you saw it happen, or were there when the guy told your friend what happened.

lame comments like:

he's at the point where he won't build build a crvtec unless the block is sleeved.

honestly, its hard to say how long this motor will last

but of the crvtec's that have come into his shop, they have all had cracked sleeves.

all i can say is i woulnd't rev it that high, and i wouldn't drive any long distances...

a friend of mine has spent around 10k on his b20/vtec and according to several high profile engine builders in the miami area

really add little to the discussion. which is generally based around actual experiences or technical theory.

that is all i am saying. so relax and keep the he said/she said down a little.

thanks,

t..

PS thanks for not swearing too

 

new for you, the bearings isn't the problem, its the balance of the bottom end. I spin mine to 8k no problem.

 

the crvtec's i've seen were naturally aspirated. and the damage was probably done by over revving and lack of tuning, along with the crv block being weaker. i just haven't seen the same things happen to a gsr block.

and i've never seen a turbo crvtec, and personally i like all motor.

plus, i like honda's engineering and honda's quality, from the factory.

i drive a 92 dx hatchback with a del sol vtec and a jdm itr transmission. mainly i auto-x my car and really don't focus on 1/4 mile times, although its probably a low 14 second car.

 

This thread has been a good one. I have a B20b swap in my civic (not crvtec) and ive been iffy about taking it more then 6,300-6,500prms because i wasnt sure how well the b20 was put together to run to the same lemits as the LS ECU i have in my car (7k) But looks like its a strong motor and will be ok at that rpm (still would not rev it past 6500) Ive had bad experiences with spinning bearings in motors, I lost 2 engine in my 92' Prelude Si (h23) but they were from misshifts. I've heard the B20 has the same oil pump as the GSR/ITR.. is this true?

 

I have a CRVtec...obviously. I take it up to 7400 all the time without any problems. Chet those kids that you talk about probably don't take care of their car and/or the builder didn't build it right.

1. The owner probably uses mineral oil and switches infrequently and other abuses.

2. The builder probably used LS oil pump or something. Many things go into building a good frank motor.

how many of the motors that your builder in FL built had their sleeves crack? Because it seems like you're just talking about "kids" that come in with damage already done. I personally know several people that run stock sleeves w/ high comp n/a setup and n2o setup. They run fine. Been running for more than a year w/o problems.

My motor was done by Intercrew in Dallas, TX and the previous owner works at Jotech, Kenny Tran's shop. Need we say more?

I think it also depends a lot on how the motor is being taken care of. If you really believe that you live your life 1/4 miles at a time(grin), and drag the poor car off every light....yeah, your motor won't last. But if you're like me and just occasional dash to 5k( just to hear vtec) on highway ramps, and do oil changes religiously every 1k to 1.5k miles with Mobil 1 Synthetic w/ new bosch filter, I think the reliability of a stock CRVtec sleeves at >= 200whp level N/A would be very good.

So tinker, if I wanted to buy a spare engine to be FULLY built, it makes no difference between LS and CRV bottom end? If that's the case, I'm getting my spare LS block NOW! It's freaking half the price of a CRV block.

Jay Kim


[Modified by AllMotorMonster, 2:40 AM 11/25/2002]

 

yep, the b20 oil pump is the same as the b18c's...ALLMOTORMONSTER, there is a huge difference between the two bottom ends, 3mm bore increase per cylinder and a better oil pump, among other things...


[Modified by GTI 1.8t, 2:10 PM 11/25/2002]

 

The b20 blocks and b18a/b blocks are the same except bore size. When you have them setting side by side at the machine shop after the OE sleeves have been cut out (getting ready for aftermarket sleeves), then they are the exact same.
Bottom line, if you are going to have a nonvtec block sleeved and you dont already have one or don't want to use the one you have, then get an LS block.

Good to see yours is back on the road tinker.

 

http://www.superhonda.com/forum/show...threadid=83796


this is why you shift @ 8k cause you fall right back into the power band of the engine and tranny.

14.4 is pretty impressive kepping in mind its the lower hp USDM B20b.

O 1 other quick question unless you really drive hard and beat on your car then why change the oil every 1k? Even if you change it every 3k the oil is still pretty frickin clean. Just my .2 cents.

Blaze


[Modified by Blaze45, 5:40 PM 11/29/2002]

 

Because sometimes my roommates and I have nothing better to do than to work on our cars. I just love working on my car and oil change is something I could always do and not hurt a thing. Also the oil just turns black, it looses that amber color. My rotary never did this. Is this typical of piston engines?

BTW, I went racing last night with my BRAND SPANKING NEW EBAY MUGEN CHIP! Very surprisingly it showed improvement. My butt-dyno didn't feel a thing, but when I raced a friend of mine with a prelude, that used to pull on me in 3rd gear, he didn't pull away from me in 3rd gear at all.

This is the best $20 that I've spent on my car so far yet.

Jay Kim