Who's motor went toast with FI and why - Page 3 - Honda Prelude Forum

Supercharged97 · 06-09-2002, 01:05 PM

Add me to the not blown list (nock on wood)

I've been blow'n from a JRSC with 6psi and jr ems for about 6 months then for about 2 months on 6psi with MSD BTM no jr ems and for about 2 months with 9psi on the MSD BTM no upgraded fuel yet, it's coming though.

sharkcohen · 06-09-2002, 01:56 PM

Quote:

Originally posted by Supercharged97
and for about 2 months with 9psi on the MSD BTM no upgraded fuel yet

Scary.

Supercharged97 · 06-09-2002, 02:20 PM

Yea but the car is currently down because of blowing the 2nd gear in the tranny and i'm waiting on parts....and it has been off and on during those 2 months that i was actually boosting and when i was racing did have race gas I know that's still not the best but it was better than nothing.

Jake Blair · 06-10-2002, 12:33 AM

Do any JRSC guys have oil coolers or radiators or water injection to combat the temp increase? What about the Hondata gasket? Has that had any affect on reliability?

sharkcohen · 06-10-2002, 02:18 AM

My JRSC setup will be running an oil cooler, a lower temp thermostat, a lower temp fan switch, a higher pressure radiator cap, and a 70/30/water wetter mixture. Hopefully, this will help things.

Quote:

Originally posted by Jake Blair
Do any JRSC guys have oil coolers or radiators or water injection to combat the temp increase? What about the Hondata gasket? Has that had any affect on reliability?

TrboH22 · 06-10-2002, 03:40 PM

Put me on the Blown motor list. Turbocharged. JG Didn't assemble my block properly, which led to no oil to the crank, which led to trashed: crank, rods, bearings, pistons, turbo, etc...My JG Built engine lasted 900 Miles.....Be Very Cautious with them.

schwett · 06-10-2002, 05:00 PM

in the line of what jkoc was pointing out, i would say so far that the data seem to support the following conclusions :

a) boosting more than 7psi WILL blow the motor
b) turbo setups at 7psi are more reliable than jrsc setups at 6psi
c) more people blow turbo motors on average (2 in 3 chance vs 1 in 3 chance) than sc people because the turbo guys raise the boost.

Quote:

Originally posted by jkoc
i'm just lookin at this list here.. it seems like people who have turbo and boosting or have boosted > 7psi blew their motor. whereas on the other side, a few turbos who've stuck to 7psi are still running ok.

as for jrsc heh... 50-50 regardless.

i dont really have a point since everyone's probably observed it but uhmm heh anyway. nevermind

TrboH22 · 06-10-2002, 07:31 PM

I was at 12 PSI With Standalone (Accel DFI)

KaOs Prelude SH · 06-10-2002, 08:47 PM

i'm in the blown list..darn it..
6psi, jrsc, jr ems/fmu, piston 2 ringland broke there burning that piston and the rest of ringlands were damaged as well
mine ended up being a timing issue

Cachase1 · 06-11-2002, 03:02 PM

Not Blown
I run 7 psi on pump gas and 11 psi on 100+ octane race gas. I have had the setup for a little over 30,000 miles. I use race gas about half of the time (when I can afford it.) I built the setup in Hawaii when I lived there. I now live in Northern Texas where race gas isn't as widely available. If it matters, I have:
-A`PEXi Dunk muffler with 2.5 in. piping
-ACT Extreme Pressure Plate
-ACT Street Disk
-MSD 8.5 mm Plug Wires
-MSD 6A Ignition Control
-MSD Blaster 2 Coil
-MSD Fuel Pump
-Turbonetics T3/T4 Turbo with .56 trim compressor and .34 on the exhaust side
-Deltagate Wastegate
-RevHard Exhaust Manifold and Intercooler
-Blitz SuperSound Blowoff Valve
-Vortech FMU
-J&S Safeguard ultra II
-All custom piping for the turbo setup
-A`PEXi V-AFC
-A`PEXi Super AVC-R
-A`PEXi Boost Gauge
-Greddy Turbo Timer
-J&S Safeguard's Dual Monitor
NO AIR FILTER, I need one badly, can't get one to fit.
For a complete listing, along with pictures, visit the website in my signature.
I am tuned at 12:1 AFR. Safeguard has saved me numerous times. Times when stuff happens like vacuum hose coming off the turbo, unregulated boost (stock internals, 22psi...twice so far) and the AVC-R's power wire coming undone. I have a serious power problem still. I made 206 whp on 7 psi, pump gas. I made 218 on one pass, 208 on the other 25 or so at best after all the MSD stuff (except fuel pump), new plugs, 10 psi, and race gas.

I am getting some used 440 cc RC injectors this week, we'll see what kind of difference it makes. Shouldn't matter.

dangerzone · 06-12-2002, 09:35 AM

1993 Si Turbo 6psi Hondata 550cc, still holding up. I think J&S safeguard helps, too.

Blaast · 06-18-2002, 08:32 AM

I blew my pistons at 8 psi, plenty of fuel with stock CR and no timing retard.

JRSClude · 06-22-2002, 07:37 PM

mark me down for a non-blown JRSC engine at 6psi with JR ems/fmu. (knock on wood)

nuro · 06-23-2002, 07:12 AM

just from glancing at the list it seems like the most reliable option is the jrsc with jr ems/fmu.... i hate to sound clueless but what does ems and fmu stand for?

schwett · 06-23-2002, 11:21 AM

that's what the JRSC comes with - EMS = "engine management system," which is basically a black box that retards timing and spoofs the map sensor and intake air temperature sensor readings. fmu is fuel management unit, it's a rising rate FPR.

Quote:

Originally posted by nuro
just from glancing at the list it seems like the most reliable option is the jrsc with jr ems/fmu.... i hate to sound clueless but what does ems and fmu stand for?

Turbo Lude SH · 06-26-2002, 09:58 PM

I'm in the Blown List, here's why:

Ran 6psi daily, not driving it to hard. Ran 12-15psi a couple times (Say 5-6 runs) which I feel weaked my motor pretty badly. I was tuning with a Vortech SFMU and a VAFC using a friends Lambda meter so I wasn't running too lean.

It blew up on a 4th gear 6psi run. She lasted 6 months of abuse though, more than I would have expected because of all the high boost runs.

All fixed now though, 1300 miles on new piston and going strong.

cuseC08 · 07-01-2002, 06:04 PM

ok, now that this thread has been going on for so long.... somone list some things that should be bought with the jrsc kit to ensure that you won't blow your engine. I'm planning on doing this and i figure i might as well spend the money to do it right so i don't have to rebuild my motor.

schwett · 07-01-2002, 06:39 PM

prayer beads.

Quote:

Originally posted by cuseC08
ok, now that this thread has been going on for so long.... somone list some things that should be bought with the jrsc kit to ensure that you won't blow your engine. I'm planning on doing this and i figure i might as well spend the money to do it right so i don't have to rebuild my motor.

sharkcohen · 07-01-2002, 09:11 PM

Quote:

Originally posted by cuseC08
ok, now that this thread has been going on for so long.... somone list some things that should be bought with the jrsc kit to ensure that you won't blow your engine. I'm planning on doing this and i figure i might as well spend the money to do it right so i don't have to rebuild my motor.

There is no consensus yet. Several people have tried different things. Results are slowly coming in.

chomorro's approach (nice results, but not ran long, uninstalled to go turbo):

MYYYYY Hondata+JRSC DYNO

REDLINE949's approach (have yet to here update):

My Hondata experience :)

schwett's approach (awaiting breakin before tune):

my car is back

my approach (not yet installed):

JRSC setup, need opinions

BLUDE · 07-02-2002, 03:31 AM

Add me to the non blown list (knock-knock).
JRSC @6psi jr ems/fmu. 10 months and 15,000 miles of fairlly aggressive driving consisting of the occasional couple gallons of 110 for the track (x4), a 150+ mph run with an M3, and the constant messing around on the streets.
A recent compression test checked good. I also flushed the radiator and added 70/30/watter wetter. Also got colder plugs gapped to .032. VPAC's at 3500rpm and BTC's at 3 from min. No detonation.