For all you forced induction people

[GrandmasterCow]

what do you gap your plugs at? I have TR6s gapped @ .030. i'm having misfire issues around 9psi, wondering if i'm blowing out the spark or if i should go another heat range colder.

[mtg6486]

my sts kit says to gap em @ .035 and ive had no problems with that

[KirkEvil]

maybe you got a bad tank of gas

[GrandmasterCow]

my sts kit says to gap em @ .035 and ive had no problems with that
how much boost are you running?



maybe you got a bad tank of gas
i don't think so - fresh tank from the station, but i'll get some from another gas station maybe it was bad gas from there.

[KirkEvil]

From what I've read .035 seems to be what everyone gaps for 7 psi. Have you always run 9psi?

[GrandmasterCow]

nah, i'm at 15psi, but once it hits 9 it breaks up and misfires. i'm reviewing my tuning. maybe it's a fueling issue and not a spark.

[TronsBird]

while were on the topic

which would be a better idea

procharger
paxton
or turbonetics(the more exspensive and harder mod)

best idea?

[Anti_Rice_Guy]

how much boost are you running?

IIRC, 6 psi, with the ability to do more.

[GrandmasterCow]

while were on the topic

which would be a better idea

procharger
paxton
or turbonetics(the more exspensive and harder mod)

best idea?

Procharger is prob my #1 SC choice, if were to go turbo, then turbonetics or an OFI kit.

[LTb1ow]

while were on the topic

which would be a better idea

procharger
paxton
or turbonetics(the more exspensive and harder mod)

best idea?


None of the above.

Forged 383. :nod:

[mtg6486]

i run 7 lbs ive gota get a good electronic boost controler and it should do 10 no prob wit meth

[TronsBird]

i wanna be the only kid in the tri-state area with a TT , turbo or suparcharged second gen for a daily
plus, power adders seem to be the **** these days


if gas werent so exspensive(even though its cheaper now) and i had a muncie m22, id just drop in a hot 455

but my original plan for my old car was a 383, decisions decisions

[creeper]

i wanna be the only kid in the tri-state area with a TT , turbo or suparcharged second gen for a daily
plus, power adders seem to be the **** these days


if gas werent so exspensive(even though its cheaper now) and i had a muncie m22, id just drop in a hot 455

but my original plan for my old car was a 383, decisions decisions

i think you need to finish paying for your car, buy some tires and a fender, and get your license back first :nod:

[TronsBird]

i got tires, license in 5 days, and the payment can wait, he got a bird for free

the fender, looks like its getting salvaged

nice pic btw keith, its dope

[Mike]

Procharger is prob my #1 SC choice, if were to go turbo, then turbonetics or an OFI kit.

didnt you already do that?

[NJSPEEDER]

Gap is too closed. To properly ignite you need some of hte air/fuel mix int ehplug, .30 is less than stock. Open them up to .35 or .40 and see what happens. If it still breaks up afer that you have either too much advance or not enough fuel.

[GrandmasterCow]

didnt you already do that?

yeah haha, i meant if he was to go turbo.

[GrandmasterCow]

ok back on topic please.


Gap is too closed. To properly ignite you need some of hte air/fuel mix int ehplug, .30 is less than stock. Open them up to .35 or .40 and see what happens. If it still breaks up afer that you have either too much advance or not enough fuel.
I'll check my timing tables. Some people on ls1tech said to gap around .028-.030 because you technically can blow out the spark when running 10+psi. it's hard to tell because everyones got something different. but your response makes sense, i'm going to look at my tables and my a/f command see whats going on.

[TronsBird]

lol my bad man

i have a question though

if your running like 15-25lbs of boost, do you need new pistons and a crank?

[Mike]

lol my bad man

i have a question though

if your running like 15-25lbs of boost, do you need new pistons and a crank?

you will within 2 oil changes. there is always an exception to the rule, but on a stock ltx or lsx bottom end, you would be running on borrowed time

[TronsBird]

the only thing that sucks about turbos is getting custom headers

[GrandmasterCow]

lol my bad man

i have a question though

if your running like 15-25lbs of boost, do you need new pistons and a crank?


I have a forged 348: dished pistons, total seal rings, eagle rods, stock crank, bored block, #317 heads, etc...


you will within 2 oil changes. there is always an exception to the rule, but on a stock ltx or lsx bottom end, you would be running on borrowed time

yeah, stock bottom end some people have been luck around 6-9psi before it's a time bomb. (550rwhp-600rwhp)

[TronsBird]

i wish i had an LS1

i really wanna drop in an LS2 in mine and TT it

[GrandmasterCow]

haha

but yeah, is anyone where familiar with SD tunes and HPTuners? If someone can take a look at my file and many any appropriate adjustments if something stands out as being wayyy wrong, can you let me know? I can sen you my file (.hpt).

[69BirdX]

Post it up on Hp Tuners fourm. See what the people think on there

[JL8Jeff]

i wanna be the only kid in the tri-state area with a TT , turbo or suparcharged second gen for a daily
plus, power adders seem to be the **** these days


if gas werent so exspensive(even though its cheaper now) and i had a muncie m22, id just drop in a hot 455

but my original plan for my old car was a 383, decisions decisions

I don't want to hijack this thread completely so I would suggest you start a new thread with thoughts of what you would like to do. Just don't hope for too much if you're gonna use it as a daily driver. TT daily driver is asking for a lot, especially in a vehicle like you're talking about.

[foff667]

If you post it here eric I'll take a quick look at it.

[Pampered-Z]

Sorry, I'm not all that familiar with LS1 setups as I am LT1s.

But here are my thoughts:

I don't think gap is your problem. I'm running 10PSI with TR6's at 35 gap, Accel coil and ignition box with no problems. I'm leaning more towards your tune.

What is your timing table? You could have too much timing in the tune?

But what I really think is you need is to switch to sensor for your boost level. Once boost get near/over 8PSI things can get tricky. Assuming LS1's work the same as LT1s, at 9 PSI you are in the area of maxing out your MAS/MAP.

Making a few assumptions here, because I don't know the details of your setup?

Where is the MAS located? People have problems if it after the compressor, need to be mounted after the air filter/before the compressor.

Also, to handle my level of boost I had to switch to a 2 bar map sensor and having the tuning set up so the ECM can “read” boost and adjust the A/F accordingly.

I use TTS software to scan my car, and I can select certain sensors to key on. If you can, scan the car and key on the MAS/MAP sensors, they are probably hitting the max and this is giving the ECM fits.

[GrandmasterCow]

My Tune File : http://www.erocktech.com/download/turbo_tune_SD.zip

[GrandmasterCow]

Sorry, I'm not all that familiar with LS1 setups as I am LT1s.

But here are my thoughts:

I don't think gap is your problem. I'm running 10PSI with TR6's at 35 gap, Accel coil and ignition box with no problems. I'm leaning more towards your tune.

What is your timing table? You could have too much timing in the tune?

But what I really think is you need is to switch to sensor for your boost level. Once boost get near/over 8PSI things can get tricky. Assuming LS1's work the same as LT1s, at 9 PSI you are in the area of maxing out your MAS/MAP.

Making a few assumptions here, because I don't know the details of your setup?

Where is the MAS located? People have problems if it after the compressor, need to be mounted after the air filter/before the compressor.

Also, to handle my level of boost I had to switch to a 2 bar map sensor and having the tuning set up so the ECM can “read” boost and adjust the A/F accordingly.

I use TTS software to scan my car, and I can select certain sensors to key on. If you can, scan the car and key on the MAS/MAP sensors, they are probably hitting the max and this is giving the ECM fits.

I don't have a MAF, its in a Speed Density tune. The MAP I still have stock one but I might have to change that out for a 2-bar MAP. I'm already going to pickup a fuel preassure guage so i can keep an eye on that.

I just put up a link for my tune file (.hpt), so if anyone can take a look i'd really appreciate it. If you need specifics about the setup let me know and i'll let you know any info you need.

[foff667]

My opinion

Too much timing 23* peak tq & 28 at peak hp is too much on a turboed ls1
Too much fuel at wot, you are commanding 9.0:1 afr at wot with your fuel tables setup how they are.
Too little injector, according to your ifr table you are running 42ish lb injectors which with 8 psi will act like 34lbers in your application, at 15psi its more like 27lbers. Not enough in your application IMO.
Don't run SD unless you go with the custom operating system, you loose way too much resolution on 98's to make it worth while and to add to that you can't tune for boost, the 105kpa row does ALL of your fueling for 1-15 psi, obviously not accurate.

Thats my opinion and I'm sticking to it ;)

[GrandmasterCow]

alright, i recorded two quick runs and i have my tune file up below. i have adjusted my HO spark and i'm going to adjust my LO spark, i also went back to using MAF and have my boost set at 6psi for now till i get a new OS and such. i ordered new injectors and i'm getting ready to order new rails, braided lines, and a boost ref. regulator.

TUNE FILE: http://www.erocktech.com/download/tune_no_sd.hpt
SCAN 1: http://www.erocktech.com/download/scan1.hpl
SCAN 2: http://www.erocktech.com/download/scan2.hpl

Here's my current WOT Main Spark High Octane timing: (Don't forget, mine's a 98, my g/cyl don't go up to 1.40, stops at 1.00 g/cyl , this image is from someone i found on hptuners forum as a starting point for boost timing)

http://img218.imageshack.us/img218/6912/wottimingrg2.th.jpg (http://img218.imageshack.us/my.php?image=wottimingrg2.jpg)

[00 LS1]

TR6s .32 tight gap zero problems on motor or spray :nod:

[GrandmasterCow]

TR6s .32 tight gap zero problems on motor or spray :nod:

cool hah yeah i figured i had some issues so i got them all good now, i'm just doing some changes to my tuning so i can get it drivable at low psi till i can get to a dyno tune.

[GrandmasterCow]

any assistance would be appreciated

[GTwhOa]

I'm running 11psi on the magnacharger on my car with TR6s gapped @ .036 no breaking up or anything.