sfwdcrx

how much boost is safe? i am running a t3/t04e .50 trim with 440cc injectors .

Schister66

Boost?? ....who cares

With those injectors on a stock B16, you're going to be limited to about 300whp or less...the only time that boost limits you (generally its horsepower) is when you're maxxing out a MAP sensor. On a stock Honda Map you can run up to 11psi.

zex_cool

.50 trim ? you mean .50 a/r ? so i take it its an ebay 57 trim, no ?
i made 250whp on 7psi on that same turbo. i'd run 10psi on a conservative map if i was you.

Joseph Davis

.50 trim is the inducer/exducer ratio of the compressor, not the AR, in no way implies chinese garbage. Read some basic FAQs.

zex_cool

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Joseph Davis &raquo;</TD></TR><TR><TD CLASS="quote">.50 trim is the inducer/exducer ratio of the compressor, not the AR, in no way implies chinese garbage. Read some basic FAQs.</TD></TR></TABLE>
it was a question. note the ? smart guy.

his pm; (7:51 PM 3/22/2008) sfwdcrx: yea it is but should i change my map sensor or dont push it with that turbo

Joseph Davis

FAQs answer questions. It's how I got so smart.

zex_cool

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Joseph Davis &raquo;</TD></TR><TR><TD CLASS="quote">FAQs answer questions. It's how I got so smart.</TD></TR></TABLE>thanks, ill make sure i pass on that one seeing how smart you are and all.

Schister66

I have no idea how you went from 50 trim to Ebay turbo...haven't you heard of a 50 trim before?? Something just doesn't add up for me

blinx9900

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">the only time that boost limits you (generally its horsepower) is when you're maxxing out a MAP sensor. On a stock Honda Map you can run up to 11psi. </TD></TR></TABLE>

or if you have a really inefficient intercooler, or if your pushing a small turbo to its limits which causes high IAT's, but yeah, for the most part your right, i know church told me he likes to keep it under 300whp for sure with 440cc's but every tuner is different, i think rpm plays a major roll in how much hp an injector can support.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zex_cool &raquo;</TD></TR><TR><TD CLASS="quote">thanks, ill make sure i pass on that one seeing how smart you are and all. </TD></TR></TABLE>

JD is smart, he's rude as a **** at times and impatient with internet fools (im not saying your one) but he is a smart and VERY experienced guy

zex_cool

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">I have no idea how you went from 50 trim to Ebay turbo...haven't you heard of a 50 trim before?? Something just doesn't add up for me </TD></TR></TABLE>lol, but i was right.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blinx9900 &raquo;</TD></TR><TR><TD CLASS="quote">JD is smart, he's rude as a **** at times and impatient with internet fools (im not saying your one) but he is a smart and VERY experienced guy </TD></TR></TABLE> i know JD well, thanks.


back on topic tho, i got another pm from the op and he said that he will be running an FMU for his "ems."

Schister66

To Mr. OP: You need to do some research. There are many problems with this thread that make me question your setup and ability to build something that will last. Do yourself a favor and learn before you end up blowing an engine apart and giving turbo Hondas a bad name like so many others have in the past

blinx9900

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zex_cool &raquo;</TD></TR><TR><TD CLASS="quote">back on topic tho, i got another pm from the op and he said that he will be running an FMU for his "ems." </TD></TR></TABLE>

i fail to see a problem, he's got a budget setup, so budget fuel managment is not a wild idea, fmu's are more than safe for a sub 225whp car...

zex_cool

his original concern was safety, something the FMU is far from.

blinx9900

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zex_cool &raquo;</TD></TR><TR><TD CLASS="quote">his original concern was safety, something the FMU is far from. </TD></TR></TABLE>

oh, thats another story as its a passive system so hes not gonna have all the safety features of a a good EMS, i personally think there safe if he keeps the boost under 10psi with the turbo he has, it wont be as fast as a good tune, but it should be safe...

Joseph Davis

10 psi on a 12:1 FMU, typically what Honduhs run, makes for 85 psi fuel pressure. Way out of any intank pump's efficient flow range, past the point where fuel pressure starts pushing the injectors shut.

On the BRMS car - 84mm GSR with GT4094R, A1000, -8 AN fuel line, Precision 1000cc injectors - we raised the fuel pressure from stock/41 psi to 55 psi in an attempt to push the car a little further on the too-small injectors. All I managed to do was make the car idle shitty and it actually wanted more fuel under boost as fuel pressures molest injector offset/deadtime in a very big way. 55 + 30-32 psi is 85-87 psi total pressure in a system with a pump that could handle it.

This guy doesn't have a pump that can handle it, and no way to tune the injectors to compensate against drastically slower response time. Bottom line, high ratio FMU with small injectors = 6 psi max, and I still don't like it as you get shitty CELs and flat spots in power and by the time you've finished [freak]ing around you could have done it the right way once and made better power.

blinx9900

we allways did FMU's matched with walboro high pressure fuel pumps and stock injectors and never had any problems, granted this was back in 1997 but we had no idea what the a/f's where as the cheapest wideband was 8k! we also kept the stock revlimits and this was mostly LS motors.

but at the end i guess if you figure the price of an FMU ~$150 compared to a chipped p28 ~$150 why not save some extra nickles and dimes and get it tuned too

Joseph Davis

Meh, I'm a control freak and you can't control anything with an FMU.

LS engines are also the most detonation-resistant engine ever made, they are kind of crazy. You know I'm building an 85mm LS with cams?


Modified by Joseph Davis at 10:52 AM 3/24/2008

93CX

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">I have no idea how you went from 50 trim to Ebay turbo...haven't you heard of a 50 trim before?? Something just doesn't add up for me </TD></TR></TABLE>


Lol.. I'd bet that close to half of the 50 trim setups on this board are eBay turbos

blinx9900

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Joseph Davis &raquo;</TD></TR><TR><TD CLASS="quote"> you can't control anything with an FMU.
</TD></TR></TABLE>

just set it... ....and FORGET IT!!!! lol thats very true. i didnt know about the LS your building, LS head too?


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93CX &raquo;</TD></TR><TR><TD CLASS="quote">


Lol.. I'd bet that close to half of the 50 trim setups on this board are eBay turbos </TD></TR></TABLE>
or turbonetics which is just as bad