heh.. You can bump my setup to 9psi. I've been running that way for a couple of months now, but I just chose not to advertise it.
Also add "J&S Safeguard" to my setup
On a side note: I *will* be building an engine for next year. The amount of power this engine is making now makes me a little nervous.
On the subject of tuning:
How can someone be sure that their car, tuned on a DynoJet dyno, is not detonating? I know that on a Mustang dyno, you can play with the chart views to actually "see" detonation. Even if the A/F ratio is correct, there is still room for error in the ignition timing... so how do tuners make it work on a DynoJet?
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Tony S. '03 WRX ... 12.69 @ 108.0 - full interior, stock 16s, street tires
'99 2.5RS '97 Prelude (old car) ... 13.94 @ 100.3 - full interior, empty trunk, 17s, street tires.
Originally posted by Obsidian7 On the subject of tuning:
How can someone be sure that their car, tuned on a DynoJet dyno, is not detonating? I know that on a Mustang dyno, you can play with the chart views to actually "see" detonation. Even if the A/F ratio is correct, there is still room for error in the ignition timing... so how do tuners make it work on a DynoJet?
I've never worked with a Mustang Dyno, but I'll assume they do something analogous to DynoJet's "smoothing" function to create a more sensitive graph.
First motor that blew is in the "blown list" JR ems/fmu motor was the original 98 with 47xxxmiles Nitrous ran by previous owner started a melt down of one of the Pistons...there was a hole the size of a grape right where the ring lands are, when we added the boost it took out all the rings
New motor (2001 w/8k) have had it for exactly 3 months about 4,000 miles not blown still using the JR ems/fmu so you can add me to both lists ha ha ha
Smitdog had his car for about a month before it was murdered!
I am a little surprised to see that silverludesi blew a motor with a Hondata. I would have figured that would make losing a piston a lot harder.
Maybe he can give us more info?
Honestly, I cant really give you any more info. Like I said, everything indicated that I was running safely. I spent a lot of money to make my set-up as reliable as possible on stock internals, but it didnt seem to help. I think the problem was caused simply by boost pressure and I just was unlucky.
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Originally posted by xtal
No guts .. no glory . Boost is coming though, I've been for a ride in a 18psi Talon, and that car planted me in the seat when he tromped it. Hard.
Steve
Ha...thats soo funny, no guts...i guess you never been in a n20 car, 18psi talon...yea i bet that was fun...but nothing like a big block 455 olds w/a 200 shot , talk about being planted in your seat..
when i meant we dont get the glory of being blown is because yall up'd a lot of money to get it...just like getting some tite volks or racing harts, not just anyone can get it, wasnt ment by having guts
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Originally posted by iranman I've never worked with a Mustang Dyno, but I'll assume they do something analogous to DynoJet's "smoothing" function to create a more sensitive graph.
Is someone going to finally announce his power figures once and for all?
You can change the views on the Mustang dyno software to show acceleration. A blip(s) of zero acceration = detonation.
For my setup, I got the 10lb map from Hondata, then I did some adjusting of my own. I actually *removed* 0.5 degrees of timing from the "11.7" column in the ROM Editor (call it paranoia), made a few minor adjustments in the fuel where it was obviously way rich or a little lean... and then made all kinds of changes to the part-throttle parts of the maps (mostly timing, it was way retarded under vacuum instead of stock). As I drove with the map, I continued to make changes to the timing at full boost if the J&S ever began to make a fuss.
I have an AEM EMS in my posession that will be going in to replace the Hondata sometime this century , and that will also require that I get the car on the dyno and finally get some numbers. It will be numbers from a Mustang dyno, and they typically read lower than ones from a DynoJet.
I did have the car dynoed tuned before on the Mustang dyno, but the numbers it was giving were way off because the load cells of the dyno were worn out or something. It only reported about 200 at the wheels, which I *know* isn't right because the car ran 13.9 with a full interior. It didn't matter at the time, because we were only using the dyno as a tuning tool and not as a measuring stick.
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Tony S. '03 WRX ... 12.69 @ 108.0 - full interior, stock 16s, street tires
'99 2.5RS '97 Prelude (old car) ... 13.94 @ 100.3 - full interior, empty trunk, 17s, street tires.
One more for Has Blown Motor list..........
I had broken ringlands on three pistons. Many factors contributed to this, but detonation was the main cause. I was using Japans version of the H22A with 10.6:1 comp. pistons. I later found out this was way to high for reliable turbo. In addition to that I used a wastegate with a 9lb spring . And to put the icing on the cake, it was being fed by a T3/T4 with .48 stage 2 turbine which is much too small for H22's exhaust discharge. :
just for reference, i dont know if you guys wanna add to the blown list.. but
i have a friend who blew his motor yesterday- it was at the shop getting a JRSC installed and he ran into a bunch of problems, wrong timing due to previous incorrect install of cams and fuel pressure bing off.
anyhow, the installers where checking if the car was running too rich by reving up the engine and BAM, there goes 3 piston lands.
he didnt even get to drive his car yet and already blown....anyhow, the installers are putting h23 pistons in because of lower compression or something....
just thought id let you guys know.
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ow. they were revving it without load and it did this!??!
the bore on an h23 piston is different than an h22 piston, isn't it? how's that gonna work?
anyway, i'm not putting anyone on the list who isn't a po.com member. i know of at least two other blown JRSCs through shops and other people on the net as well.
Quote:
Originally posted by soon2bsh just for reference, i dont know if you guys wanna add to the blown list.. but
i have a friend who blew his motor yesterday- it was at the shop getting a JRSC installed and he ran into a bunch of problems, wrong timing due to previous incorrect install of cams and fuel pressure bing off.
anyhow, the installers where checking if the car was running too rich by reving up the engine and BAM, there goes 3 piston lands.
he didnt even get to drive his car yet and already blown....anyhow, the installers are putting h23 pistons in because of lower compression or something....
just thought id let you guys know.
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I dont know what to do. I have a 97 Sh and i want to run a turbo. I was going to get head work done and lower the compresion to 7:1 and then run a turbo with innercooler. I also right now run NOS. I love it, but i want more. But I dont know if i Should. What do you guys think? Is the turbo worht the hassel and the money. And how much stuff do you have to get beyond the turbo kit itself? What is the maintence of a Turbo? I dont want to get too off topic. But i have been thinking of rabout 3 months on getting a trubo. But after seeing that it is basically a 50/50 chance of blowing my engine, i think i might just be over it.
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Originally posted by schwett the bore on an h23 piston is different than an h22 piston, isn't it? how's that gonna work?
no the bore is the same but I'm not sure putting H23 pistons in a H22 would lower compression... I don't think they are the same pistons with lower compression than the H22, I'm pretty sure I read somewhere that they are a bit different in that the wrist pin isn't at the same height...
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
yes, that counts. i assume you had to replace the piston at the very least. (unless you're running on 3 cylinders. )
what's your setup?
Quote:
Originally posted by kidkutz well it didn't really blow...but i did break a ring land...does that count??
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. Boost is coming though, I've been for a ride in a 18psi Talon, and that car planted me in the seat when he tromped it. Hard.
. And to put the icing on the cake, it was being fed by a T3/T4 with .48 stage 2 turbine 
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