So did some tuning today on the dyno.. The car wont make power as before.. Torque numbers are fine but just wont make power.. I looked into all the tuning aspects I could think off but dont get why it doesnt make power..

My setup= gt30 turbo 0.60 a/r, tubular manifold, full 3" exhaust, E85

Base number 207hp 243tq
Final numbers
251 tq at 3.7k rpms- 5psi
215 hp at 6k rpms- 7psi
???

My setup= gt30 turbo 0.60 a/r, tubular manifold, full 3" exhaust, E85, step 2 colder plugs at 0.034"
weather wasnt so bad 80F, coolant temps max of 197F but most around 181F, air temp is around 82-92F

Got my afrs tuned, 11.8-12.2.. and timing got tons of it too.. Im at 25 advanced on the higher rpms, w/ E85 yeah i can add some but no point i see very minimal hp gains. .

checked the plugs, compression is good, no exhaust leaks, didnt do a boost leak test but checked all couplers and lines.. if i do have a boost leaks its small even my wastegate is struggling holding the boost down and spool is still quick..

I only have 2 things I havent covered, hydra VTC map and boost leaks test... but anything else?

 

Ace please email your map to

Mike@mtuned.net

 

Ace - right off the bat, is your wideband configured to read gasoline or E85?

If converted for E85, you're too lean as stoich is around 9.7 - not saying you can't run that AFR, hell I know you can sometimes get away with near 14.7 and not ping. But to make power on E85 your AFR should be 7.1 ish

Also, is your VTC map all zeros or is it the base that Hydra provided?

 

Oh - and this is a silly question - but did you calibrate your TPS?

 

Also - would you happened to have logged your dyno runs?

And why doesn't your hp and tq cross at 5250?

 

Nevermind about the hp tq crossing question. That's because your HP is on the left and TQ is on the right.. doh.

 

Fuel ........................ AFRst ........ FARst ....... Equivalence Ratio ... Lambda
Gas stoich ................ 14.7 .......... 0.068 ................ 1 ................... 1
Gas max power rich .... 12.5 .......... 0.08 ................. 1.176 .............. 0.8503
Gas max power lean .... 13.23 ........ 0.0755 .............. 1.111 ............. 0.900
E85 stoich .................. 9.765 ....... 0.10235 ............ 1 ................... 1
E85 max power rich ...... 6.975 ....... 0.1434 .............. 1.40 ............... 0.7143
E85 max power lean ..... 8.4687 ...... 0.118 ............... 1.153 .............. 0.8673
E100 stoich ................ 9.0078 ...... 0.111 ............... 1 .................... 1
E100 max power rich .... 6.429 ........ 0.155 .............. 1.4 .................. 0.714
E100 max power lean .... 7.8 .... ...... 0.128 .............. 1.15 ................ 0.870

Ethanol reaches max torque at richer mixtures than gasoline will.

 

Im using a gasoline wideband but afr readings are based on lamda readings =1, let say on vacuum my afr is at stoich it will still read 14.7 but the real afr is 9.7 with E85 if I used an E85 wideband it will be showing the actual E85 mixture 9.7 (stoich) instead of the gasoline 14.7 (stoich)..

TPS is calibrated.

my vcti map have values on it, is yours at zero?

 

Mine has values - comparing now..

 

Yeah I know if wb is at gas you can trust your readings.. that's why I was asking if it was set up for E85 instead.

 

oh ok yeah.. not on e85 afr

 

Ace - one thing I noticed on your map - shouldn't our trigger and sync edges be Falling/Falling? You have it as any edge on both.

Try copying these values and settings:

 

try going with stock plugs. 2 step colder on 7psi seems to be a little overkill. also, try gapping them closer, as you may be getting spark blowout. ive picked up 30whp on the dyno just from gapping my plugs.

 

Going hotter is a good idea - but I doubt he's got spark blow-out by looking at the graph.

 

you could always try the lakemod, collect the insurance money, and start over with an evo.

 

^ bad brett

 

Actually Ive been 0.028, 0.030, 0.032, pretty much same result low hp.. I might try a step one colder. Actually ive been to 9 and 10 psi 0.028 gap same hp

Rob the settings i have are from hydra ems, andrew walked me through the settings and unlocked my triggers and warned me not to use any other map.. its good i almost forgot about that..


Brett- lol thats one option but will you find me a driver lol

 

lol @ brett

 

Ace - that's weird because those same settings I have were inspected by Hydra and said it should be good. dunno bro.

 

ace i can almost guarantee the compressor cover on your turbo is leaking. I havnt seen a garrett turbo that came from todd or any other garrett turbo for that matter that didnt leak from the compressor cover.

just an example of how big an issue it can be, I tuned Marcial before i had a compressor so i didnt do a boost leak test at first. I got his afr's steady and set boost areas to 12afr. Later on he dropped off his car for some upgrades and thats when i did a boost leak test, I fixed a massive leak on the comp cover and retightend some hose clamps. went to retune and his boost areas had leaned out to dangerous levels (mid 13's). I had to retune all over again. The point is his vac looked good and he was reaching his wastegate spring pressure but the air volume just wasnt there before, after you could tell the difference cause of the fuel i had to add.