What's the "ideal" all motor buildup using OEM parts? Half way through my LS/VTEC buildup, so I want to think this through before commiting more $$$ into it.

What I have so far:

B18b block
B16a head/tranny

I want to throw in the highest compression OEM pistons I can run. (CTR, oversize?) Working on P&P my own design, so head is already fully disassembled. How high is the ITR valvetrain good for? 9k rpms?

Any other insights? TIA! *Remember, OEM parts only*

 

block girdle, vtec oil/water pump and new rod/main bearings... i cant think of anything else thats oem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98CTRCoupe &raquo;</TD></TR><TR><TD CLASS="quote">What's the "ideal" all motor buildup using OEM parts? Half way through my LS/VTEC buildup, so I want to think this through before commiting more $$$ into it.

What I have so far:

B18b block
B16a head/tranny

I want to throw in the highest compression OEM pistons I can run. (CTR, oversize?) Working on P&P my own design, so head is already fully disassembled. How high is the ITR valvetrain good for? 9k rpms?
</TD></TR></TABLE>

yeah CTR pistons, and mill your b16a head 30 thous, hen mill #3 main cap on the ls block to fit a GSR crank girdle or just buy a Z10 Motorsports one.


Greg

 

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

yeah CTR pistons, and mill your b16a head 30 thous, hen mill #3 main cap on the ls block to fit a GSR crank girdle or just buy a Z10 Motorsports one.</TD></TR></TABLE>

Would I need to cut some deeper reliefs in the CTR pistons? I know it's a pretty high dome on those. And what would be the ending CR, assuming w/o milling the head? I want to keep this car on the street (and pump gas).

I haven't heard feedback about the Z10 girdle...anyone with experience with those?

 

well if you wanna use OEM parts then you can use the B18C crank girdle but you have to get the mill the center cap to fit the B18A/B/B20B. But if you into aftermarket then this one is a bolt-on with most of everthing you need except the windage tray, oil pick-up and oil pan...
http://app1.hybridgarage.com/s...00001
..but you dont need a crank girdle...


Modified by 10K2HVN at 3:43 PM 5/30/2003

 

there is no need for a girdle. and youre not even close to being unstreetable on 91 oct with oem parts

 

What's the "ideal" all motor buildup using OEM parts?

B20z short motor
ITR head and valvetrain
ITR bolt ons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AussieB20vtec &raquo;</TD></TR><TR><TD CLASS="quote">What's the "ideal" all motor buildup using OEM parts?

B20z short motor
ITR head and valvetrain
ITR bolt ons</TD></TR></TABLE>
i would rather LS short and the higher compression CTRs

 

Sorry I thought he was after performance

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AussieB20vtec &raquo;</TD></TR><TR><TD CLASS="quote">Sorry I thought he was after performance </TD></TR></TABLE>
sorry higher compression will yield better numbers

 

torque

 

Yeah well...My dad can beat up your dad.

Well with an LS block and CTR pisonts stock bore un milled stock B16A head and stock head gasket you are gonna be pushing 12ish:1 compression. Pretty decent and cheap and OEM reliable. Might wanna upgrade those cams though. Umm I'll take a 12:1 compression 81mm x 89mm block ANYDAY over a motor that is identical except it's 84mm and only 10:1 compression. (all numbers assuming stock un touched B16/ITR head) :shrugs:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AussieB20vtec &raquo;</TD></TR><TR><TD CLASS="quote">Sorry I thought he was after performance </TD></TR></TABLE>

stock block b20vtec wont be able to outdo a b18 with CTR pistons. no way, no how.

 

run a ctr/itr combo of cams also

 

Why is it, that everytime I browse alot of boards and look at what people are trying to buy they always think that putting a "girdle" on a LS/CRV block is really good?

That has got to be the biggest myth on the internet.

And an expensive one at that. Expensive myths suck.

Don't buy a girdle....buy a GSR block if your concerned, its less money.

Jeff

 

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

stock block b20vtec wont be able to outdo a b18 with CTR pistons. no way, no how.</TD></TR></TABLE>

agreed

 

I witnessed a LS/VTEC with no girdle throw a rod when hitting a little over 10K rpm's on a dyno. It was ustilizing Skunk 3's, and we found its weak point, the Eagle Rod Bolts. Crank was still in balance.

The CTR B18A/B LS/VTEC setup will produce very nice power. And I agree with buy a B18C if you want the girdle. The cost will come out the same.

 

10K? lol of course it did something like that. lol that is not to smart. i wonder if teh girdle would have even helped him out?

 

It was beening tuned with DFI and beening worked in sessions (rpm segments). The dyno indicated that the Stage 3's were still making power past 10K with his setup. This motor is also bigger than 1.8L.

This wasn't a situation of being "smart". It happen's when you are racing and push each eqaution to it's limit. You evenually find your weakest link.

From further evaluation, the LS crank held up without any distortion. As for would a block girdle help snapping a rod bolt? You make the call.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AussieB20vtec &raquo;</TD></TR><TR><TD CLASS="quote">Sorry I thought he was after performance </TD></TR></TABLE>

BUHAHAHAHA! Good one.

But yes, most performance out of OEM parts. (I can get my hands on OEM parts easier and for cheaper.)

 

ls bottom 300
ctr pists 300
itr exh cam 250
ctr intake 250
b16 500
r valve train 200
ls crank (in shorty)
r IM 150
ls rods (in shorty)
jdm r header 250
b16 tranny 500
thatll be the best setup for 2700 (all that was high price guesses)


Modified by hybridvteceg at 7:18 PM 6/2/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">ls bottom
ctr pists
itr exh cam
ctr intake
b16 or r head
r valve train
r crank
r IM
ls rods
jdm r header
98+ r trannythatll be the best setup</TD></TR></TABLE>
...or you can just buy an R-swap...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 10K2HVN &raquo;</TD></TR><TR><TD CLASS="quote">
...or you can just buy an R-swap... </TD></TR></TABLE>
or you could have this setup for cheaper and more power
i meant LS crank, lol im retarded./

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">
or you could have this setup for cheaper and more power
i meant LS crank , lol im retarded./</TD></TR></TABLE>
Oh..i thought it was weird that you would buy a LS block then a R crank....now retract my statement..

 

ha