93 tune vs. stock modify question

[jas72]

i installed the 93 tune with modified parameters and got it real close to being good. i get a 3.0 knk at 3200 rpm, but my afrs in mid to high 11's to redline. my question is.. anyone know how much more hp does the 93 tune modified gain vs a stock modify with my mods?? boost levels are awsome, 3k rpms-15 psi to 18 psi at redline. my main concern tho is my 3.0 st knk at 3200 rpms, i cant seem to lower it much more, added 11% fuel at that rpm range, knk doesnt go any higher after that, 0.00 st knk to redline after 3200 rpm, 0.00 LT knk too. need to dyno soon to see where im at whp -wise. would the fuel pump re-wire help me? i have all the fixins to do this, and is on my to do list next. thanx for any help, ideas.

[vicious118]

Have you tried adjusting timing?

[boostedblue607]

Try adjusting the time and see what happens with the knock at 3200rpm, then let us know

[jas72]

i took out 5% timing at the 3-4K rpm range and its still there, should i take out more?? awhile ago i had a ST knk of 6.0 at 5200 rpm's, nothing at the 3200 range, so i changed my plugs to the NGK 4306's (gapped at .35) from the Champion 3507 (gapped at .55!)i believe, and that took all high rpm knk out, but now i have the lower rpm ST knk. man this thing pulls like crazy now and lovin it, just wanna get that other knock count down past 2 and i'll be happy. ok, i will pull some more timing out and see what happens, let ya know soon, thanx guys

[Secondchance]

timing doesnt come out in %, it comes out in degrees.

Add 4-5% fuel and get new plugs, gap them to .32.35 and youll see no knock.

[4TEHW]

What octane gas are you running?

If I recall, spark/timing adjustment is measured in degrees, not percentage. Could be different now, however, as I'm using a Trinity and not a Predator. Check to see if it has a % symbol or simply says degrees.

What are your A/Frs and timing at 3200rpms? Generally, the lower the timing, the higher the EGTs which could also contribute to knock.

[jas72]

duh, im sorry guys, i meant i pulled 5 degrees timing, i was thinkin about fuel % too.lol but i run 93 octane from BP gas stations. afrs are 11.8 at 3200 rpms and timing is at 23 degrees then climbs as the rpms go up. Go's up to 28- 30* at redline. my afr's are about the same all the way to redline. (high 11's) just seems when i do a 3rd gear pull at 3K, right away i get the 3.0 st knk then drops to 0.00 after that. Well, i'll give it another degree or 2 of timing retard or advance and see what goes on. Is a 3.0 knk harmful? i know its not BAD, but i would like it a tad better, but thanx for the help fella's, will see what happens soon.

[4TEHW]

Quote: Originally Posted by jas72

duh, im sorry guys, i meant i pulled 5 degrees timing, i was thinkin about fuel % too.lol but i run 93 octane from BP gas stations. afrs are 11.8 at 3200 rpms and timing is at 23 degrees then climbs as the rpms go up. Go's up to 28- 30* at redline. my afr's are about the same all the way to redline. (high 11's) just seems when i do a 3rd gear pull at 3K, right away i get the 3.0 st knk then drops to 0.00 after that. Well, i'll give it another degree or 2 of timing retard and see what goes on. Is a 3.0 knk harmful? i know its not BAD, but i would like it a tad better, but thanx for the help fella's, will see what happens soon.

Instead of pulling MORE timing (because -5 is a lot, in my opinion) try richening the fuel up a tad more. Go for 11.3-11.5 A/Frs and see if your knock reduces at all. - Also, is that 3KR ST or LT knock? You might have already stated this, I just want to be clear.

[jas72]

whoa, i just re-read my last run on my DSP, and at 3047 rpm/s the timing was at 19.00 spk. cyl #1, stays under 20 and THATS where my 3.0 ST knk is at too, so i assume i need to add timing here?? ALL KNK is ST btw

[4TEHW]

Quote: Originally Posted by jas72

whoa, i just re-read my last run on my DSP, and at 3047 rpm/s the timing was at 19.00 spk. cyl #1, stays under 20 and THATS where my 3.0 ST knk is at too, so i assume i need to add timing here?? ALL KNK is ST btw

It's at 19 spark even after retarding it by 5 degrees?? That doesn't seem right.

[jas72]

yeah, high teens to low 20's, then at 4400 rpm's it jumps to 25.50 and goes up from there, that was the last time i tuned the timing was earlier today, not right now i didnt do it, just to clarify. exhaust temp is 1475 at the 3000 rpm ranges, then gets up to around 1600 at higher rpm/s. dont know if this tells anything. all this logging was done at my lunch time today and havent messed with it since yet. so, do i still need to add some timing here in the 3K range or fuel??

[4TEHW]

Quote: Originally Posted by jas72

yeah, high teens to low 20's, then at 4400 rpm's it jumps to 25.50 and goes up from there, that was the last time i tuned the timing was earlier today, not right now i didnt do it, just to clarify. exhaust temp is 1475 at the 3000 rpm ranges, then gets up to around 1600 at higher rpm/s. dont know if this tells anything. all this logging was done at my lunch time today and havent messed with it since yet. so, do i still need to add some timing here in the 3K range or fuel??

Well, if you're at 19* around 3200rpms, I'd say you can afford to remove another 1-2 degrees of timing. Do that and recheck your ST knock.

[jas72]

ok, thanx for your help. wont do it tonite, but will keep ya posted tomorrow, im staying in and having Bisquits and Gravy for dinna!!! mmm mmm good. Have a good one guys, i'll check' er out later.

[Nosfurato]

Quote: Originally Posted by jas72

whoa, i just re-read my last run on my DSP, and at 3047 rpm/s the timing was at 19.00 spk. cyl #1, stays under 20 and THATS where my 3.0 ST knk is at too, so i assume i need to add timing here?? ALL KNK is ST btw

NO!! If its trying to pull timing OUT.. do NOT add timing!! That will only make the problem worse! Knock retard is essentially the computers way of protecting the engine from TOO MUCH timing,.. so.. adding it is never a good idea..

Retard the timing,.. do NOT advance it! "- degrees" not "+ degrees"


-Will.

[jas72]

ok, here we go, i installed the stock tune then re-installed the 93 tune and modified the parameters again, only 1 count of knk at 5300 rpms and afr's were high 10's near redline, so i took a tad fuel away in that range and gonna run again after work, REALLY close now, just have to get the afr's a little better, but right now its safe, running a tad rich. thanx!! post back later