Was doing alittle tuning last night, after checking out hustlers spark map I noticed his low end timing was more than mine and figured I'd give a few more degrees a try, our top end cells were almost identical and we are both running low comp motors and similar turbos (2871 vs 2860) so why not give a few more degrees a shot.
Everything went well but I noticed I had alittle knock at peak torque and 12-18psi (cells I changed were 2900-3400 and under 100kpa and fuel was added after aswell), so I checked my afr's, solid 11.5's, timing was 18*-20* from 3400-5700 and 183kpa to 230.
So after dropping a few points of timing and suppressing the kncok (now sitting at 16* from 3400-5700 @183kpa and 15* @ 212 and 14* @ 230) noticed a couple things;
1) My IAT's are rising from 70-80F to 90-105F in a single pull(as in the delta is approx 20F when I do a long pull)! This is in 16C weather at night, seems like way to much and I'm betting that is what's causing my det problems.
2) I can run 25-27 degrees of timing at 8psi in the same rpm cells and get no knock and I would expect to lower the timing as the boost rises but from 25 to 16 degrees for 4psi, seems extreme.
So I'm thinking my intercooler really is maxed out.
I just wanted to confirm this before my broke student *** spends any money.
Should I just ramp up more fuel ghetto tuner style? DC is sitting at 75% at 220kpa on my 750's
Or pick up one of those $100 intercooler from ebay (this is what I'm planning)