Is anyone detonating? - Honda Prelude Forum

chomorro · 08-30-2001, 11:23 AM

I have experienced some pinging I think from the lower octane of gas. I am now running 5 clicks from minimum. Is anyone else having this problem?
I am going to switch to colder plugs and the water intercolling from JR does anyone have any feedback from this product?
Does anyone know how long you can ping before your engine is screwed?

DirtyLude · 08-30-2001, 12:55 PM

I wouldn't bother with the aquamist unless your only going to be using it while racing. It's just another maintenance item and after a while you're just not going to bother filling up the water tank anymore. Just back off the timing a bit.

Pure Lude · 08-30-2001, 01:52 PM

yup, dirtylude said it.

you're car should run fine w/o the aqua mist anyway.

schwett · 08-30-2001, 05:31 PM

no pinging here, probably like 5 clicks from min but maybe a bit lower even. i'm running colder plugs, in a relatively cool climate.

what does pinging sound like, anyway? i've heard various descriptions, none of which sound like anything my car does. [shrug]

chomorro · 09-01-2001, 11:58 AM

I did back off the timing and the pinging is gone but I lost a little boost. What would you guys recommend if I want full timing and boost?
Pinging is just a clicking sound that occurs full throttle on and off. Its is not constant, but you can hear for a second and then it will go away. Start in thrid gear and that sound it makes is pinging.

schwett · 09-02-2001, 01:53 AM

by some odd coincidence, the day after i posted "what does pinging sound like" i found out first hand... after lowering my fuel pressures, i was hearing it pretty strongly between 3000-4000rpm at full throttle. i had to bring the btc all the way to halfway (straight up between min and max) to make it go away. i ended up increasing the fuel pressure again, and advancing the timing a couple clicks, and it feels good again. is this relationship between fuel pressure and detonation normal?

Quote:

Originally posted by chomorro
I did back off the timing and the pinging is gone but I lost a little boost. What would you guys recommend if I want full timing and boost?
Pinging is just a clicking sound that occurs full throttle on and off. Its is not constant, but you can hear for a second and then it will go away. Start in thrid gear and that sound it makes is pinging.

chomorro · 09-05-2001, 02:35 PM

I don't think feul pressure has anything to do with pinging. Maybe it was just some bad gas or something. What is your pressure at? Could be wrong though.

DirtyLude · 09-05-2001, 02:50 PM

Less fuel pressure means less gas, means leaner a/f, means detonation.

schwett · 09-05-2001, 02:52 PM

right; that's what i thought. the odd thing is that i'm almost positive the jr afpr is set HIGHER than it used to be, but my a/f gauge reads LEANER and i was pinging.............. time for some careful "tuning"

Quote:

Originally posted by DirtyLude
Less fuel pressure means less gas, means leaner a/f, means detonation.

TegRa-iN-Oz · 09-09-2001, 06:14 PM

pinging is like metals rustling....and I wouldn't leave it thinkin its ok......your timing being retarded is a band aid solution. NEVER fill up with low octane gas as you will be prone to detonating. If you have spent that much money on FI, i wouldnt sacrifice it by paying for cheaper gas.

if you want the normal boost without retarding, I suggest you get yourself better injectors. The honda one is fine, but as you go through the high revs, the injectors cannot supply enough fuel, the fuel pressure regulator is good, but i wouldnt cut corners. I know i will be safe from stronger injectors...theyre cheap anyway....

also management computers will be a breeze tuning that car. you wont be fiddling much and you can be sure theres enough fuel in the engine.

the rule is, more air, you will need more fuel.
you will run lean if there isnt enough fuel=bad
you will run rich if there are exessive fuel=bad
tune that thing with a proper computer and not band aid solution and you will have less headaches.

inlinefour · 09-09-2001, 07:41 PM

Quote:

Originally posted by TegRa-iN-Oz

if you want the normal boost without retarding, I suggest you get yourself better injectors. The honda one is fine, but as you go through the high revs, the injectors cannot supply enough fuel, the fuel pressure regulator is good, but i wouldnt cut corners. I know i will be safe from stronger injectors...theyre cheap anyway....

Get a clue.

TegRa-iN-Oz · 09-09-2001, 08:01 PM

Quote:

Originally posted by inlinefour

Get a clue.

:finger:

DirtyLude · 09-09-2001, 09:10 PM

Quote:

Originally posted by inlinefour

Get a clue.

lol! Agreed.

TegRa-iN-Oz · 09-09-2001, 10:01 PM

look, what i was tryin to say is that, with better injectors, combined with an excellent management system, you have more room to play with ur car.

There is a performance shop here in oz where his 4 cylinder car runs in 8's....fastest 4 banger in OZ.

Since turbo kits are expensive, $8000Aus, thats $4000US, installed, I was talking to him for cheaper alternatives and here's what we are doing for my GSR:

Im buying a second hand T28 turbo from S14 silvia.
Second hand front mount intercooler from r32 gtr
he will install a new computer rather than piggyback/remap as it will be harder to tune without the new management system.
replace the stock injectors with stronger ones.
He will install downpipe, highflow cat and exhaust - 3 inch all the way
second hand BOV from WRX
and it will be tuned and set to 8psi

all in all I am only Paying just a little over $4000Aus which is $2000US...

now i reckon thats a good deal and a great setup. I have room for more boost if i change the turbo, and i know it'll be safe. He had experiences with the fuel risers and extra injectors before, and some of his customer's engines blew up. eversince he just installs better injectors and do the computer to squeeze more juice from the setup.....it makes sense....