GSR internals in LS block
Thread Starter
Honda-Tech Member
Joined: Sep 2004
Posts: 1,589
Likes: 0
From: Newark, DE, USA
GSR internals in LS block
Hey guys i was wondering if anyone could tell me weather a GSR crack, rods, and pistons would work in a LS block with a vtec head? I know someone from a local machine shop has a LS rotating assembly in a GSR block but i dont know if it will work the other way around, any info would be great Thanx again guys 
Joined: Sep 2004
Posts: 25
Likes: 0
From: Hershey, PA, 17033
Re: GSR internals in LS block (NJIN BUILDR)
Yeah, the parts will swap right in. Although it won't be quite the same as a GSR block for a few reasons.
1. GSR has under-piston oil squirters for better lubrication at higher RPM
2. GSR blocks are prebalanced in house before sold.
3. The crank girld on the GSR allows for a more steady hold on the bottom end at higher RPM.
4. The Oil feed for GSR comes through the block, you'll have to run an external oil line.
5. GSR has a better oil/water pump.
So taking this into account.... essentially the only real similarity between a GSR and an LS is the bore, and the fact that they are 1.8 B motors. Which sadly, the displacement on the 1.8 is made by the stroke and not the bore. So b16 parts can get thrown right into a b18 motor. But, it'll drop the displacement to 1.6 liters then.
I was planning on doing the same thing... LS/VTec. But it's like 300 bucks for the golden eagle oil fitting kit, another 300 to balance it and so-forth, then 65 bucks for the crank girdle (plus shipping... ebay). Not including the oil squirters.... youve already spent 665 on a bottom end that still doesn't compare to a GSR block.
So, I found a junkyard that sold me a GSR short block for 400 bucks. Now, put a b16a2 head on there. The smaller combustion chamber will raise the compression, you're on your way to a makeshift Type-R
1. GSR has under-piston oil squirters for better lubrication at higher RPM
2. GSR blocks are prebalanced in house before sold.
3. The crank girld on the GSR allows for a more steady hold on the bottom end at higher RPM.
4. The Oil feed for GSR comes through the block, you'll have to run an external oil line.
5. GSR has a better oil/water pump.
So taking this into account.... essentially the only real similarity between a GSR and an LS is the bore, and the fact that they are 1.8 B motors. Which sadly, the displacement on the 1.8 is made by the stroke and not the bore. So b16 parts can get thrown right into a b18 motor. But, it'll drop the displacement to 1.6 liters then.
I was planning on doing the same thing... LS/VTec. But it's like 300 bucks for the golden eagle oil fitting kit, another 300 to balance it and so-forth, then 65 bucks for the crank girdle (plus shipping... ebay). Not including the oil squirters.... youve already spent 665 on a bottom end that still doesn't compare to a GSR block.
So, I found a junkyard that sold me a GSR short block for 400 bucks. Now, put a b16a2 head on there. The smaller combustion chamber will raise the compression, you're on your way to a makeshift Type-R
Honda-Tech Member
Joined: Mar 2003
Posts: 3,333
Likes: 0
From: Hudson, NH, 03051
Re: GSR internals in LS block (jlantic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlantic »</TD></TR><TR><TD CLASS="quote">
1. GSR has under-piston oil squirters for better lubrication at higher RPM
2. GSR blocks are prebalanced in house before sold.
3. The crank girld on the GSR allows for a more steady hold on the bottom end at higher RPM.
4. The Oil feed for GSR comes through the block, you'll have to run an external oil line.
5. GSR has a better oil/water pump.</TD></TR></TABLE>
Actually the squirters are for piston cooling.The blocks are not balanced the rotating parts are.The parts he is looking at are factory balanced and will be good to use as they are.The girdle is a bonus and not really necessary for a street engine.A ls/vtec line can be made for less than $50.The oil pump can be made the same as a vtec pump with a $3 spring.The gsr pump just spins slower at higher rpm,not a big deal in a street engine.
The gsr rods are better pieces than the ls.If he can get the gsr stuff for short money it would make a nice cheap project.
1. GSR has under-piston oil squirters for better lubrication at higher RPM
2. GSR blocks are prebalanced in house before sold.
3. The crank girld on the GSR allows for a more steady hold on the bottom end at higher RPM.
4. The Oil feed for GSR comes through the block, you'll have to run an external oil line.
5. GSR has a better oil/water pump.</TD></TR></TABLE>
Actually the squirters are for piston cooling.The blocks are not balanced the rotating parts are.The parts he is looking at are factory balanced and will be good to use as they are.The girdle is a bonus and not really necessary for a street engine.A ls/vtec line can be made for less than $50.The oil pump can be made the same as a vtec pump with a $3 spring.The gsr pump just spins slower at higher rpm,not a big deal in a street engine.
The gsr rods are better pieces than the ls.If he can get the gsr stuff for short money it would make a nice cheap project.
Trending Topics
Honda-Tech Member
Joined: Nov 2004
Posts: 2,577
Likes: 0
From: Tecks-us
Re: GSR internals in LS block (11secEk)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlantic »</TD></TR><TR><TD CLASS="quote">So taking this into account.... essentially the only real similarity between a GSR and an LS is the bore, and the fact that they are 1.8 B motors. Which sadly, the displacement on the 1.8 is made by the stroke and not the bore. So b16 parts can get thrown right into a b18 motor. But, it'll drop the displacement to 1.6 liters then.</TD></TR></TABLE>
no, you can't just drop B16 rotating assembly into a 1.8 block. you'd have a deck delta of 9mm. that means the pistons, at top dead center, would be 9mm from the top of the block. yeah, you'd have a compression ratio that is very, very low. maybe 7:1? don't know, don't care, suffice to say it would be horribly low.
also, the GS-R and LS have the same deck height, which means you can swap from one rotating assembly to the other with either block.
the b16 and GS-R blocks both are capable of revving high reliably. the longer stroke of the GS-R required the use of the block girdle, which is probably the greatest part of the GS-R block. now that several companies offer this for the LS, the GS-R is outmoded. for a few hundred bucks you can make an LS block rev just as reliably as a GS-R.
no, you can't just drop B16 rotating assembly into a 1.8 block. you'd have a deck delta of 9mm. that means the pistons, at top dead center, would be 9mm from the top of the block. yeah, you'd have a compression ratio that is very, very low. maybe 7:1? don't know, don't care, suffice to say it would be horribly low.
also, the GS-R and LS have the same deck height, which means you can swap from one rotating assembly to the other with either block.
the b16 and GS-R blocks both are capable of revving high reliably. the longer stroke of the GS-R required the use of the block girdle, which is probably the greatest part of the GS-R block. now that several companies offer this for the LS, the GS-R is outmoded. for a few hundred bucks you can make an LS block rev just as reliably as a GS-R.
Thread
Thread Starter
Forum
Replies
Last Post
