I was wondering if anyone could please inform me of any problems they encountered while going all motor on their b18c or b18c1 integras ( or if you have that same motor in a different car) feel free to let me kknow as well. I'm putting 12:1 compression pistons in along with mating a b16 head thats ported and polished with stage 2 race cams. I've am concerned that by doing these mods i might need to work on other aspects of the car. For example do i need a bigger fuel system, more of a performance starter ( to crank the higher compression), and should i balance my crankshaft. Thanks for the help!

 

Get the whole bottom end assembly balanced to compliment the built head.

 

oem starter should work just fine, i dont think you'll need a bigger fuel pump, but someone correct me if im wrong.

 

I'm currently building an all motor gsr....this is what I'm doing.

Head:
port and polished with 3 angle valve job
supertech valve train (black nitrade valves, valve springs and retainers)
Blox Type B cams (might change to something else)
skunk2 cam gears
rc310 injectors
skunk2 IM and ITR TB

Block:
Blue printed and balanced
jdm ctr oversized pistons
balanced 12.5 lb act flywheel
mugen thermostat
arp rod bolts and arp head studs

misc:
190lph walboro fuel pump
crome tuned chipped/socketed p28 ecu

i'm sure i'm missing a few odds and ends, but my build is supposed to yield some nice gains and should be a solid/strong motor once its fully tuned. Tuning is key for all applications (turbo, na, etc)

 

yes u should balance your rotating assembly since upgraded your pistons. this includes flywheel, pressure plate, crank, rods and piston. if your build n/a look into bigger injectors. something like 310-370 will do the job. why are u mating a b16 head? that will lower the comp. stick to your gsr head is u have it. dont belive the hype of a b16 head out flowing a gsr head. if its being built its about the same . upgrade i/m on gsr it wil net higher hp. gsr head alone holds a higher comp than b16. what size are those valves. stock? .5mm o/s? or a1mm o/s? flat faced or dished?




Modified by myfirstdc2 at 2:09 AM 11/12/2007

 

Yeah, ill balance the rotating assembly then. I forgot to mention I have a fidanza flywheel idk if that changes anything. (I know I still have to balance it) And that sucks that I have to get bigger injectors but I figured as much. As for the b16 head I was told it has better flow and I've already sold the gsr head so oh well. Oh and as for the valves I was planning on keeping the stock ones but now that ya mention it I should probably just do those as well. Any suggestions for best power output for my application and i've heard that cam gears don't really help that much...would you recommend them?

 

I've heard that cam gears are over rated. What have you heard? I also would like to know why your just going with the ctr oversized pistons if your already going to bore it out why not go the next step for aftermarket pistons or a stroker kit?? Plus, how does the thermostat help power output ( mugen stickers are cool though too! Ha) Sorry last question: what is the crome tuned chipped ecu do? i know the p28 is the stock ecu but how is that better than say a hondata or a apexi vtec controller?

 

well installing a lighten flywheel will just benifit u for faster acceleration, but your decel with drop fast as well too. like i mention before when u get your rotating assembly balanced they will use that flywheel instead of your stock. if u already sold it thats ok b16 will do fine. i was just letting u know that it will drop your compression ratio thats all. as for cam gears u will need them for fine tuning your motor. your upgraded your springs and retainers right? if u running stages 2 u will need to do so.

 

Since your basically building your whole head, cams,retainers,springs, I would recommend flat face vavles stock diameter. It will help get back some of the lost cp from the B16 head. And depending on how much clearance you have to play around with there are the aftermarket companies that make thinner headgaskets to also help bump the cp back up a tiny bit. The B16 head doesn't really flow better, the B16 and GSR go back and forth througout the rpm's. A GSR with a Skunk2 style IM basically just like having a B16 head. As was just stated also, I would recomend cam gears for the tuning purposes of the cams.

 

https://honda-tech.com/zeroforum/44

 

Thanks for the help! Yeah i already have upgrades springs and retainers. I bought em with the cams.

 

cam gears arn't all hype, if you're running after market cams you probably won't make the most power at 0,0. You cam manufacturer should list the correct degrees for the cams.

A B16 head won't lower cr that much more than a gsr head, if you are replacing pistons then it won't matter that much anyways because you can get the desired cr from the pistons you choose.

crome is just a program for tuning, for crome

and you don't want to run stock injectors, use this to calculate ideal injector size http://www.injector.com/injectorselection.php

 

errrr no! it does to matter what head u have. even if u have 12:1 cr pistons. 12:1 is based on head and block combination used. it is also affected by headgasket as well. b16 will drop cr. with his combination now it will not be 12:1. unless he upgrades his valves to flat face or mill his head or run a 2 layer headgasket. to bump it back up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by myfirstdc2 &raquo;</TD></TR><TR><TD CLASS="quote">errrr no! it does to matter what head u have. even if u have 12:1 cr pistons. 12:1 is based on head and block combination used. it is also affected by headgasket as well. b16 will drop cr. with his combination now it will not be 12:1. unless he upgrades his valves to flat face or mill his head or run a 2 layer headgasket. to bump it back up. </TD></TR></TABLE>

a B16 head will decrease cr by about .2 or .3:1.(i'm not saying it won't) And obviously we all understand that cr is based on the head,block,head-gasket,piston-deck height, and lastly the pistons used. Since he's already going to buy new pistons, I suggested just getting pistons with a larger dome to reach the desired cr. He could mill the head, or run a thinner head gasket, or even put in flat faced valves, but if he's trying to work on a budget and doesn't want to spend the $, the pistons would be most obvious.

btw your setup sounds very similar to mine myfirstdc2

 

problay hahaha is similar. ive built a few motors this way. good bang for the buck. but yea just wanted the op to get as much info as he can so he can make an educated decision

 

Alright so here's what I'm going to do...I'm going to kick myself in the *** for getting rid of the gsr head, deck the b16 head, get flat faced valves (already have the performance springs and retainers to go along with the cams) and balance the rotating assembly. And yeah I'm workin' on a budget...isn't everyone in college.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mcln594 &raquo;</TD></TR><TR><TD CLASS="quote">Alright so here's what I'm going to do...I'm going to kick myself in the *** for getting rid of the gsr head, deck the b16 head, get flat faced valves (already have the performance springs and retainers to go along with the cams) and balance the rotating assembly. And yeah I'm workin' on a budget...isn't everyone in college.</TD></TR></TABLE>

just running on a 2 layer headgasket will make up the .3:1 cr loss between the gsr head and the b16 head. If you can swing the cost of valves then go for it since I would suggest a valvejob when you're installing the new valvetrain anyways. http://www.c-speedracing.com/h...c.php &lt;--maybe that will help your decision making somewhat.

btw what cams do you plan on running?