CR-V VTEC
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Joined: Sep 2004
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CR-V VTEC
Once again folks, I'm sure this has come up here before but I didn't have any luck finding anything useful so.....
I've already posted that I was considering a stroker kit for my C5 and that I was considering turbo. Both of which have been talked about enough. A lot of people agree (one of the few things that pple agree on) is that the max boost u should run on a stock ITR is 8psi without rebuilding the bottom end. Instead of rebuilding the block why not throw in a B20 block into your ITR. Which is probably the stongest block and the torqueiest. They are also cheap as ****. Here are some stats...
Stock USDM B20b
Compression 8.8:1
Horsepower: 126hp @ 5400
Torque: 133lb-ft @ 4300
Stock B18c5
Compression: 10.6:1
Horsepower: 195hp @ 8000
Torque: 130lb-ft @ 7500
So wouldn't you in theory be able to boost the **** outta this engine due to the low compression ratio? Also the B20 has torque through its ******* which is probably as most of you would agree the weakest stat on the R. I would bet that a stock CR-V would have a stock R off the line for like .5 of a second due to the high torque. As soon as ITR gets into the power band the CR-V would die, but it would be interesting to see.
I know CR-V VTEC has been talked about before but I'm more interested in what kinda boost numbers you can get outta it. I would imagine depending on your driving style this Frankenstein doesn't last too long (otherwise Honda would have done it) All opinions are welcome....
I've already posted that I was considering a stroker kit for my C5 and that I was considering turbo. Both of which have been talked about enough. A lot of people agree (one of the few things that pple agree on) is that the max boost u should run on a stock ITR is 8psi without rebuilding the bottom end. Instead of rebuilding the block why not throw in a B20 block into your ITR. Which is probably the stongest block and the torqueiest. They are also cheap as ****. Here are some stats...
Stock USDM B20b
Compression 8.8:1
Horsepower: 126hp @ 5400
Torque: 133lb-ft @ 4300
Stock B18c5
Compression: 10.6:1
Horsepower: 195hp @ 8000
Torque: 130lb-ft @ 7500
So wouldn't you in theory be able to boost the **** outta this engine due to the low compression ratio? Also the B20 has torque through its ******* which is probably as most of you would agree the weakest stat on the R. I would bet that a stock CR-V would have a stock R off the line for like .5 of a second due to the high torque. As soon as ITR gets into the power band the CR-V would die, but it would be interesting to see.
I know CR-V VTEC has been talked about before but I'm more interested in what kinda boost numbers you can get outta it. I would imagine depending on your driving style this Frankenstein doesn't last too long (otherwise Honda would have done it) All opinions are welcome....
Honda-Tech Member
Joined: Apr 2000
Posts: 12,949
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From: Atlantis
Re: CR-V VTEC (type_r_jon)
....sorry, but you're going to get a LOT of "do a search" type of responses.
The rod/ stroke ratio of the crv is the downfall. The midrange tq is nice around town, but even on boost it doesn't make significantly more power than an itr. In fact, the block isn't "strong as ****" as you put it - the sleeves are notoriously weak, and the rods can't take the abuse. You could maybe push 14psi max for a shor time before blowing it up - ironically while making similar horsepower to an itr at 8psi. And you simply can't rev it out like you can an itr.
So once again itr > *
Try searching in the archives.
If you really want to make power, simply start with a sleeved block and/ or rod + piston upgrades for big boost numbers.....
The rod/ stroke ratio of the crv is the downfall. The midrange tq is nice around town, but even on boost it doesn't make significantly more power than an itr. In fact, the block isn't "strong as ****" as you put it - the sleeves are notoriously weak, and the rods can't take the abuse. You could maybe push 14psi max for a shor time before blowing it up - ironically while making similar horsepower to an itr at 8psi. And you simply can't rev it out like you can an itr.
So once again itr > *
Try searching in the archives.
If you really want to make power, simply start with a sleeved block and/ or rod + piston upgrades for big boost numbers.....
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Joined: Dec 2001
Posts: 18,151
Likes: 2
From: Hollywood Babylon
you are just opening a giant can of worms and looking for trouble. before you do ANYTHING you need to understand what you are getting yourself into here.
you CANT boost the **** out of a stock Honda motor. Doesnt matter what displacement the motor has, thats not the issue. The issue is the rod strength and piston/rings. If you want to boost big, you need to build the bottom end (forged rods, pistons, and sleeves at the very least). Also, B20 blocks are known to crack where the cylinders meet so you would probably be better off with an LS/GSR block.
Furthermore, if you are going to boost big, it really doesnt matter what the stock torque numbers are. yeah a CRV has more torque stock for stock, but you can easily sleeve and bore an LS block to 84mm and 2.1L displacement and boost the hell out of it with proper internals.
Research is your friend. And I hope you have deep pockets.
you CANT boost the **** out of a stock Honda motor. Doesnt matter what displacement the motor has, thats not the issue. The issue is the rod strength and piston/rings. If you want to boost big, you need to build the bottom end (forged rods, pistons, and sleeves at the very least). Also, B20 blocks are known to crack where the cylinders meet so you would probably be better off with an LS/GSR block.
Furthermore, if you are going to boost big, it really doesnt matter what the stock torque numbers are. yeah a CRV has more torque stock for stock, but you can easily sleeve and bore an LS block to 84mm and 2.1L displacement and boost the hell out of it with proper internals.
Research is your friend. And I hope you have deep pockets.
Thread Starter
Joined: Sep 2004
Posts: 404
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Re: thx fellas
So what I'm getting is that it's best to stick with the B18c5 bottom end and rebuild it if I want o boost more then 8psi? I know your probably sick of newbies like myself asking the same questions over and over but this is how we learn! Thanks again. 
Joined: Jun 2004
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From: Go Chargers Go,, CA
Re: thx fellas (type_r_jon)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type_r_jon »</TD></TR><TR><TD CLASS="quote">but this is how we learn!</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina »</TD></TR><TR><TD CLASS="quote">Do a search.</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina »</TD></TR><TR><TD CLASS="quote">Do a search.</TD></TR></TABLE>
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Joined: Dec 2001
Posts: 18,151
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From: Hollywood Babylon
Re: thx fellas (type_r_jon)
Personally I would just get another used block and build that. You can get used high mileage shortblocks for very cheap. Leave the ITR block alone that way you have something to fall back on when/if something happens to the turbo set up(chances of that are very good).
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Joined: Dec 2001
Posts: 18,151
Likes: 2
From: Hollywood Babylon
Re: (itr206)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 »</TD></TR><TR><TD CLASS="quote">but it still has stock honda pistons . . . they still melt and break lands.
also the B20 sleeves are weak as hell . </TD></TR></TABLE>
like you know anything about turbo set ups lol
hows the bike treating you?
also the B20 sleeves are weak as hell . </TD></TR></TABLE>
like you know anything about turbo set ups lol
hows the bike treating you?
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