amdaman

Hi all,

My car has finally been tuned after loads of issues getting the tensioner issues and belt slip sorted. Ended up getting a fully custom tensioner setting setup and an extra idler plus an 8rib pulley setup.

Anyway, my setup is as follows:

7.5" / 4.3" pulley setup
Novi 1200 @ 16.5psi
AEM meth kit
1000cc ID injectors
AEM 1052u

Previously the same tuner made about 420whp without meth when it was on a Novi 1000 @ 14.5psi. It's now making 400whp and 410 with meth on the 1200 @ 16.5psi. He said it was knocking past that quite a bit so he's kept it safe. I'm happy with the result but we're both a bit baffled. Is there any reason for this though? The blower is pretty much brand new.

Also on a warm start he's mentioned the idle is Hunting between 1000-1700rpm sometimes
and it has the same idle parameters as the last tune which was fine. We've cleaned the Map, checked for vac leaks, cleaned the iacv and changed the TPS.. He suspects meth may have damaged the IACV, should I but another or should I check other stuff first?

Any help or info greatly appreciated.

Thanks

AP1Chief

What kit is it? Im runnign 5.5 bottom and 3.0 top with very minimum slip issues.

who rebuilt the blower?

amdaman

It's a brand new Paxton 1200 on an SOS adapter bracket for CT kits.

s2k manic

do you have a baffled oil pan? I had problems with knock back before I learned to tune myself he thought my motor was dying turns out the alloycraft baffle I welded in had cracked in 3 places not the welds the actual panel. after I found that I welded in a moroso trapdoor baffle and I haven't had any problems with knock sense. the consensus is 2.2volts is the max you should be seeing and its usually at peak torque. I'm running around 15 degrees of timing at 18 psi knock voltage at 7300 rpm is 1.8 volts so I run fairly safe timing the water/meth helps as does running in the 170's on coolant temp. my summer tune has 13.6 degrees at 16.5-17psi in the heat. if you run aem pm me your tune and ill take a look.

s2k manic

something I do with the iacv it limit its movement to 5-10 degrees as the meth causes the lower bearing to be too clod and seize up enogh that the stepper motor cant move it even with it being heated with coolant I adjust for the lack of movement in the accel versus tps table and it works good

s2000Junky

Make sure your running an SOS TB if your Injecting. OEM doesn't have the seals necessary. I doubt many other aftermarkets TB do either. I never had any issues when injecting with my SOS TB. Your output for your set up is definitely not right compared to the NV1000.

EOE

Anyone think that the NOVI1000 #s seem high? Maybe previous numbers you were given crank instead and what you're seeing now is at the wheels? Just thinking out loud here.

1) AIT should be lower with NOVI1200. Were they and what are you seeing?
2) How would IAC cause more knock?
3) Belt slip with 3.4" Pulley seems weird, I don't even have that much issue with 3.0". My 3.2" and 3.4" were no problem.
4) My NOVI1000 360-370WHP on DynoJet at 13psi with 3" Pulley if that helps (Yes I am on the lower end than others)
5) Folks are blaming my Greddy Ultimate piggyback ecu, you seem to have AEM.
6) My AIT are 20-30f above ambient with SOS Large HE and Cobra Pump

I know that with stock ECU it pulls timing as soon as you hit, I think 114f AIT. The higher it gets the more and more it pulls.

Anyways I'm done rambling on.

s2000Junky

420whp is on the high side for a NV1000 agreed. But the current set up is still low. I assume both set ups were run on the same dyno.

JawKnee

Are the referenced dyno numbers in the same correction factor?

amdaman

Hi,

There's no baffled pan in this build. How do you limit the iacv? I've ordered a refurbished one off ebay so I'll see if that does anything. I'll also send you a copy of the map when I get the car back, pm me your email address. I did look into the SOS TB and will get one if the problems persist. I don't intend on using the meth much though especially of it only gains an extra 20whp.. Can I just clarify that the knock and iacv issue are separate, just thought I'd see if I could get some info on both issues.

The Novi1000 was being overspun with a 2.8 pulley and the quoted numbers were at the wheels. I also have a fmic and it was giving 14.5psi. Someone mentioned dyno variation, this is a different dyno to before but the gap still seems fairly large to me. I'll try and find out what the AIT Temps were but it's summer now here in NZ so probably a bit higher than last time it was tuned in winter.

I'll get the dyno graphs shortly but yeah different dynos. The other tuner said he made a 60whp gain with scope for more with the meth though. My current tuner said he's never seen that before..That's when it was running 18psi.. Is that even possible? I'm running 100% meth. I'm only making a 20whp gain with meth now.