What can a CRV B20 block handle for HP

[89coupe]

How much HP can a CRV B20 block handle for hp with a turbo setup without being sleeved? This setup would have fordged low compression pistons and new rods but in a stock block no sleeves.

[jdmsource]

it will depend on the turbo size, i think rage2 tuned one a while ago which was a stock b20b/vtec with turbo and got around 320ish to the wheels on a mustang dyno.

[89coupe]

I'm not asking how much could you potentially make I'm asking how much HP can the block handle safely before it cracks or goes beyond its physical limitations.


Originally posted by jdmsource
it will depend on the turbo size, i think rage2 tuned one a while ago which was a stock b20b/vtec with turbo and got around 320ish to the wheels on a mustang dyno.

[rage2]

Try it and find out. I don't think anyone's tried it before. I was thinking about doing it myself (stock block/sleeves with forged pistons/rods) but I'm gonna go all stock block instead.

There's a guy with a b18b integra block, stock sleeves, forged pistons + rods, making 450+whp reliably, so the sleeves definately aren't the weak link.

[redline]

who is this? how long has it been? d how often does it see 450whp?

[89coupe]

What brand of piston and rods was he using? What size turbo? What boost level? The more info you can provide the better.

Thanks.


Originally posted by rage2
Try it and find out. I don't think anyone's tried it before. I was thinking about doing it myself (stock block/sleeves with forged pistons/rods) but I'm gonna go all stock block instead.

There's a guy with a b18b integra block, stock sleeves, forged pistons + rods, making 450+whp reliably, so the sleeves definately aren't the weak link.

[rage2]

I'll have to find the link, legendboy sent it to me a while back.

Remember, most of the loads on sleeves comes from revs, not from power. This is why stock sleeves are *usually* good enough as long as they can handle the revs.

[legendboy]

A couple guys make 400whp on a stock b20 block. Other guys crack sleeves at 250whp. I'm pretty sure its all in the tuning. (edit: and not reving it out as stated ^ :D )

[redline]

there were guys making 500whp on stock GSR blocks it does mean they lasted, but they have a dyno sheet to prove what they have done... also it does mean that i would recommand anyone try it...

[redline]

Originally posted by legendboy
A couple guys make 400whp on a stock b20 block. Other guys crack sleeves at 250whp. I'm pretty sure its all in the tuning.

:werd:

[89coupe]

I was hoping that maybe Honda had a spec sheet listing the HP limitations of their blocks?

Like when I was building the motor on my car I knew that the stock Ford block was only good for 400hp and anything above that was a risk.

I understand that a good tune is very important but it doesn't matter how good the tune is if you have reached the limitations of the materials being used.

I guess the aftermarket scene for Honda's is still to new for people to know this information:dunno:

[legendboy]

Your gonna be looking for theoritical answers then.

[89coupe]

Is that another way of saying there isn't enough experience in the Honda aftermarket to give an accurate answer?


Originally posted by legendboy
Your gonna be looking for theoritical answers then.

[shadowz]

check www.honda-tech.com great site for info

[legendboy]

Originally posted by 89coupe
Is that another way of saying there isn't enough experience in the Honda aftermarket to give an accurate answer?




I already gave you the answer in my first post http://images.honda-tech.com/set1/smile/emdgust.gif

Honda doesn't provide that kind of information. Maybe the BAR racing team could help you out :rofl:

[89coupe]

I posted the same question on their boards as well. Didn't get much response.


Originally posted by shadowz
check www.honda-tech.com great site for info

[redline]

Originally posted by 89coupe
I posted the same question on their boards as well. Didn't get much response.



post a link to the thread??????

[89coupe]

http://www.honda-tech.com/zerothread?id=1017338

[Loose]

Originally posted by 89coupe
I was hoping that maybe Honda had a spec sheet listing the HP limitations of their blocks?

Like when I was building the motor on my car I knew that the stock Ford block was only good for 400hp and anything above that was a risk.

I understand that a good tune is very important but it doesn't matter how good the tune is if you have reached the limitations of the materials being used.

I guess the aftermarket scene for Honda's is still to new for people to know this information:dunno:

If you asked Honda, they'd probably say 146 hp :thumbsup:

[redline]

Originally posted by Loose


If you asked Honda, they'd probably say 146 hp :thumbsup:

:rofl:

[redline]

Originally posted by 89coupe
http://www.honda-tech.com/zerothread?id=1017338

try this...

http://www.honda-tech.com/zerosearch

[89coupe]

You think i didn't try that first. :rolleyes:


Originally posted by redline


try this...

http://www.honda-tech.com/zerosearch

[legendboy]

There isn't much good information on Honda-Tech about the b20 paticularly. Your gonna find a wide range of experiences.

[rage2]

You're gonna find a WIDE range of answers in the Honda tuning department. Like legendboy mentioned, too many FMU guys and bad tuning to give you the real answer.

The b20vtec that I tuned that put out a bit over 300whp on Toma's dyno, it's still running good AFAIK. Completely stock b20 bottom end.

Also, how long it lasts also depends on it's use. The same motor used only in drag racing will last longer than the same motor used in roadcourse lapping. So without a defined time of survival, or defined usage, you can't just say "this block is good for xxx hp". Unless you're selling stuff, but then that's just marketing fluff.

[89coupe]

So what turbo and fuel management system was he using and how much boost to make that 300whp


Originally posted by rage2
You're gonna find a WIDE range of answers in the Honda tuning department. Like legendboy mentioned, too many FMU guys and bad tuning to give you the real answer.

The b20vtec that I tuned that put out a bit over 300whp on Toma's dyno, it's still running good AFAIK. Completely stock b20 bottom end.

Also, how long it lasts also depends on it's use. The same motor used only in drag racing will last longer than the same motor used in roadcourse lapping. So without a defined time of survival, or defined usage, you can't just say "this block is good for xxx hp". Unless you're selling stuff, but then that's just marketing fluff.

[Loose]

http://forums.beyond.ca/search.php?s=&action=showresults&searchid=1045692&sortby=lastpost&sortorder=descending

[rage2]

This thread in particular:

http://forums.beyond.ca/showthread.php?threadid=45409

The receipe's in there if you read through the posts.