well i just had a GSR motor with CTR pistons dropped in my LS

they used 310 injctors
new fuel pump
obd1 gsr ecu
VAFC2

i also have intake / dc 4/1 header / high flow cat and exhaust

for some strange reason i only pulled 155 hp to the wheels

is this too low? seems i should be making much more power with the high comp pistons and vafc2 tuning?...

 

anyone? i know this cant be right ..

 

Yes, your numbers seem low. Time to start diagnosing the engine. Compression, leak down, etc.

 

Whats your timing and AFR at?

 

You're from Carlisle?

Where'd you get it dyno'd at? Dynamic Motorsports?

If you wanna' stop by with the car, I work at Sound Innovations out on Trindle. I'm sure one of us here could help you diagnose the problem.

 

People always forget one of the most important parts, what kind of dyno was it? If it was a Mustang, that's about right.

 

im still using my LS throttle body .. im wondering how much this is affecting things ..

yep the car was done at dynamic

they do awesome work so i know its nothing they did wrong , probally just more parts i need

not sure what kind of dyno was used .. i DO know its the roller wheel kind where u put your drive wheels on

 

You are way undercammed if you have the stock gsr cams

 

using stock gsr cams .. but still shoulnt i be capable of making at least 170-180 whp? the fuel system was upped to 310cc rc injectors , and high flow fuel pump and fpr were installed ... with vafc2 tuning also ... im really wondering whats holding me back. maybe just my LS throtle body ... also the stock gsr ecu ?? that isnt taking advantage of my high comp pistons is it ?

 

No you woudnt make 170-180 whp. Raising compression alone with some bolt ons wont yield much power. Its all about engine packaging.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmHboy &raquo;</TD></TR><TR><TD CLASS="quote"> Its all about engine packaging. </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Yes, your numbers seem low. Time to start diagnosing the engine. Compression, leak down, etc.</TD></TR></TABLE>

no not yet.....what dyno was this tuned on??

 

it was a dynojet ...

the shop said my compression is off the charts and very high ( 270 something )

 

here is the dynoplot ...



thoughts??

 

What does your AFR look like??? What is your timing set to??? Looks like your VTEC crossover is too low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">Looks like your VTEC crossover is too low.</TD></TR></TABLE>


how do you get that by that graph????


it is in MPH's not RPM.....you don't know where it's at......you really have no clue do you....

 

vtec is set at 5500 which is really high it seems

 

its been tuned with FPR and VAFC2 , 310 injectors ... using LS throttle body

not sure of a/f ratio but it is tuned right

i wonder where i could get my ecu chipped and if that would help any

 

so what should my next step be

 

Yes the LS throttle body is holding you back, but not all the way to 155hp. Id say some decent cams+tb and tuning would give you around 15hp, being conservative. Still not astonashing numbers for a 1.8l with CTR slugs.

 

i think its your front bumper... probably causing air flow problems

 

lmfao!

 

way undercammed for the compression. ls tb is a lil small but not holding you back that bad. Is your dc 4-1 a "jdm" model with 2.5" collector? or is it the regular version? if its the regular version, thats choking you a good bit as well.

 

you got your car done dynamic? how much did they charge you for tuning and dyno runs? im gonna go to there arond march for tune and stuff when i get my parts in. im outside of dillsburg so thats the closest place.

 

Easy, look at the dip when vtec hits, you dont need to see rpm to know where to set vtec.