I have a 90 CRX with a B16A. I melted 2 pistons on nitrous. I want to put a built B18C1 shortblock under my B16A head and convert to OBD1. Would this be a good idea cuz i heard the b16 and type r heads flow better than a gsr? By the way i plan on going turbo with this motor. Also which computer should I run until I can get a stand alone, GSR or b16a?

 

anyone wanna give some suggestions? sorry if it is a noob ? but i am tryin to learn all that i can thanks

 

yeah thats fine. use a chipped p28

 

check out hondata.com

 

you can use any vtec ecu.

but if youre gonna boost, the b18c wouldnt be the best engine to get. when you put boost down into the cylinder, with the b18c's poor l/r its gonna have a tendency to force the piston into the cylinder wall, causing premature failure. you can remedy this a few ways; buy lighter rods/pistons, destroke it slightly, or change the pin height on the piston.

make sure you buy cams made for turbo applications because vtec cams have too much overlap in them. youre gonna wash your cylinder, losing boost, especially when vtec engages.

 

I thought a b18c would be good because i see alot of peps use it in drag racing. i plan on sleeving the block. prolly aebs sleeves or a dart block whichever my funds allow. i want to use eagle rods with the arp upgrade and either cp or je pistons. stock crank by the way what exactly is l/r ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RABHonda &raquo;</TD></TR><TR><TD CLASS="quote">

but if youre gonna boost, the b18c wouldnt be the best engine to get. when you put boost down into the cylinder, with the b18c's poor l/r its gonna have a tendency to force the piston into the cylinder wall, causing premature failure. you can remedy this a few ways; buy lighter rods/pistons, destroke it slightly, or change the pin height on the piston.

make sure you buy cams made for turbo applications because vtec cams have too much overlap in them. youre gonna wash your cylinder, losing boost, especially when vtec engages. </TD></TR></TABLE>

hahaha who told you that?

 

books.
the gsr has a l/r (rod length/stroke) ratio of 1.58:1. when you build a gsr that can handle more than 24lbs of boost, they change the pin height. rod length, or stroke to give it a better l/r, somewhere between 1.70-1.80:1. if not, the piston has a tendency to punch thru the cylinder wall, fairly quickly. given a gsr engine runnin 12lbs of boost with a compression ratio of 9.5-10:1 isnt going to push a piston thru the wall, but it will rub it out-of-round by 30k-45k miles. then when that happens, if the driver keeps pushing it by revving it out, piston slap will slowly destroy the piston itself. if you want to get 100k+ miles out of the engine, even under boost, the b18c in stock trim isnt the best choice.
or were you talking about the cam remark?
this is why vtec cams dont do good under boost applications-overlap. for an n/a engine you want overlap because that allows the cylinder to fill adequately. the first gen b16 cams have 17 d, the 2nd gen have 22 d, and ctr cams have 28 d, and the itr has 25 d. with the exclusion of the itr, you can see how they increased hp by looking at the overlap from the cams.

buying lighter pistons/rods-if you do this, you have less rotational weight, therfor less weight being forced up. this will actually help the engine in two ways; allowing for a greater mechanical efficiency and reducing cylinder wall loading.
destroking-this should be obvious. less stroke while retaining the same rod length would increase the ratio, bringing it closer to 1.75:1, which is considered perfect.
pin height variation-this by far is the best option, IMO. you would move the pin closer to the top of the piston, shrinking the overall height of the rod/piston. this will allow you to shorten the piston skirt also.

why a 1.75:1 ratio is desired- you can run less piston skirt, tighter piston-to-wall clearances, less rings, and a lighter overall piston/rod assembly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ajkeeter &raquo;</TD></TR><TR><TD CLASS="quote">I thought a b18c would be good because i see alot of peps use it in drag racing. i plan on sleeving the block. prolly aebs sleeves or a dart block whichever my funds allow. i want to use eagle rods with the arp upgrade and either cp or je pistons. stock crank by the way what exactly is l/r ?</TD></TR></TABLE>

Actually, the prefered b00st engine for drag racing is the NON VTEC SOHC.