ok im kinda a newbie to this so i did some searching. i have most of these parts sitting in my baement from old motors i had play around with but i want to build something worth while

b18b block
usdm type r pistons (11.7 CR)
stock ls rods w/ arp rod bolts
arp headstuds
golden eagle vtec kit
ls crank
oem honda bearings
b16 water pump and oil pump
b16 head w/ stock valves and springs
ctr cams
8lb flywheel
stage 3 clutch
aluminum crank pulley w alt pully only *no ps or ac*
stock b16 IM
dc 4-1 header
2.5" homemade exhaust w/ magna flow muffler
310cc injectors
3" homemade intake
tuned with crome
b16 tranny w/ quaife lsd

could i rev this to 8500 or even 9000?

if i do break 200whp, what approximatly what will this run in the quater with a completely stripped eg hatch that weights 1600 with driver on drag radials? thanks for looking

 

I dont think youll see 200 because of a couple of things
============================================
Type R's in Ls block w/ B16 head I dont think that gives you 11.7CR
stock b16 IM
dc 4-1 header
2.5" homemade exhaust w/ magna flow muffler
ctr cams

Im not trying to be negative. HELL I hope you hit 200 with these parts. But Im building an LSvtec as well and after some research i found i needed alot of work to hit 200whp.

 

yeah thats cool, well what else would i need? i used that compression calculator. id like 11.5:1 and with type r pistons thats what it gave me. i didnt belive it either. the zealautoworks caluculator and c-speedracing differs. which one is more accurate?

 

the numbers you are getting i would believe if you had the JDM itr pistons, not the usdm though. youre looking at like 11:1.

 

id like 11.5 so what pistons. zeal and cspeed are totally different

 

i think zeal is more accurate then c-speed. since they account for compression height and it seems that c-speed does not.

only thing im iffy about with the zeal is with LS blocks. they show that LS blocks are approx. .5mm shorter then a gsr block, not sure if this is true or not, maybe just an innacurate measurement. i dunno. that probably the reason you are getting high comp #'s from zeal for your ls block.

on pistons, id use the JDM ITR's. that should give you your 11.5

 

m ls-vtec gpot dynoed to night at only like 170 on a regukar dyno no dyno jet with way way more done than that soo good luck but i hope that you got something going on i dont

 

I just entered the numbers on the zeal calculator and I get 11.6 cr on his setup. I think what you should measure is piston to deck height once the pistons are installed to get a more acurate reading. From what I am told you should use the ls deck height instead of the gsr.
C-speed calculator works alright but then again you still have to measure the piston deck height to get the right numbers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">the numbers you are getting i would believe if you had the JDM itr pistons, not the usdm though. youre looking at like 11:1.</TD></TR></TABLE> Actually with ITR pistons you will be at about 11.5 because of the stroke difference. LS has 89, ITR has 87.2

 

piston deck height meaning when the piston is at tdc, it the difference between the flat part of the block to the piston? now is this from the miiddle of the piston or the side becuase it will differ depending on the dome.

ps, i friend of mine made 170 whp with a stock b16 head thrown onto a stock ls block w/ ls pistons with a 3" intake and stock exhaust manifold with 2.5" mandral all the way back. mind you he had it tuned almost to perfection.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KINGSOL18 &raquo;</TD></TR><TR><TD CLASS="quote"> Actually with ITR pistons you will be at about 11.5 because of the stroke difference. LS has 89, ITR has 87.2</TD></TR></TABLE>

JDM yes, USDM no, extra stroke only bumps you up like .2

 

if the head is off...give it a valve job and mill some to bump compression up a bit. Get a better header, if your on a budget look into the edlebrock pro-flow with the 2.5 inch collector mod. O and get a good tuner...but it looks like your going to have a nice set-up, dont focus on peak numbers worry more about your powerband in general. O and any pics of that car that weighs 1600lbs WITH driver?

 

what should i rev to? 8500?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the.hamburglar &raquo;</TD></TR><TR><TD CLASS="quote">what should i rev to? 8500?</TD></TR></TABLE>

With the CTR cams, 8500 RPM seems like a decent shift point.

Get some larger cams and spin to 9000 RPM.

- Derek

 

yeah but what about the length of the rods? i read the lsvtec doesnt have the best rod stroke ratio. also how does one balance the rotating assmebly?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the.hamburglar &raquo;</TD></TR><TR><TD CLASS="quote">yeah but what about the length of the rods? i read the lsvtec doesnt have the best rod stroke ratio. also how does one balance the rotating assmebly?</TD></TR></TABLE>r/s ratio means **** on a street motor. take it to a machine shop or a reputable engine builder for the rotating assembly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the.hamburglar &raquo;</TD></TR><TR><TD CLASS="quote">piston deck height meaning when the piston is at tdc, it the difference between the flat part of the block to the piston? now is this from the miiddle of the piston or the side becuase it will differ depending on the dome.

ps, i friend of mine made 170 whp with a stock b16 head thrown onto a stock ls block w/ ls pistons with a 3" intake and stock exhaust manifold with 2.5" mandral all the way back. mind you he had it tuned almost to perfection.</TD></TR></TABLE>

yeah you should measure them at tdc. Not a the dome but close to the edge of the piston were it is the flatest, against the top of the cylinder. Measure all of them at the same point to get a close reading.
I am no expert a this but someone correct me if I am wrong. First measure the piston at tdc zeoring out the gauge then just move it on top off the sleeve with out making any adjustments and it should give you the measurement.

 

what will the machine shop do to balance it? id like to know

 

how does a machine shop balance the rotating assembly?

 

If you want your motor compression to be close to 11.7 use b16 pistons. If you want the moly coating on the side skirt get the b16 pistons made by Safety, they also come with hastings piston rings.

 

safety pistons? where can i get some? i was thinking the NPR cast pistons on ebay. they are like 99 bucks for b16b. should i just get p30 pistons then?