turboffr

Attended the dyno day at Slowhawk Performance today (thanks Don). Didn't get to tune it but the one run logged netted 435 rwhp & 403 rtrq (Mustang Dyno). It was pinging so it was only brought up to 5700 rpms. HP was still climbing so there's more left in it.

Setup: LS2, MN6, Kooks 1 3/4 Headers, Cats, Borla Stingers, SLP UD pulley, 228/232 cam (thanks Spin), Callaway Honker, Ported TB, & FAST 102 intake.

The car gained 54 rwhp & 35 rtrq with addition of the cam and the FAST 102 intake. Previous dyno results were 381/368 with stock cam and Spin ported LS2. I'm happy considering it was only run to 5700. I'm tuning it myself using HP Tuners and had some help from SpinMonster & LSCHELM to get me going.

silvervette05

Great #'s bud...really great..I am anxious to get mine back on the dyno..I went with spins 230/234 cam..and also added the slp UD pulley..before i only did 379..i'll know on the 12th..And again congrats on some great #'s..

LSCHLEM

Nice work, That Cam will peak at 6300 so there is certainly more init.

turboffr

Thanks for the help Leon. Not sure when I will get back to the dyno to see what it can truly do, but I will be going to the drags with it soon.

LSCHLEM

Did you have the 102 PORTED ? . I was just looking at my dynochart and
I peaked at 455 @ 6300 and was at 440 @ 5700 wIth similar torque curves. I THINK IF YOU GET IT OPTIMIZED YOU CAN WELL EXCEED 460
AND THAT WOULD BE A STATEMENT FOR THE 102 fast.

Neumonic2002

Great numbers! Plenty of HP left in your setup with some fine tuning!!

CTD

Very good results, I'm a self tuner as well.

All I have done to date with my C6 is a Spin ported Fast90 & TB. I was amazed how that change alone affected the tune. As in how much more fuel I had to add & how little timing it would take.

turboffr

The FAST 102 is straight out of the box, unported. If nothing else I guess it shows the 102 is comparable with the ported 92 since we have almost identical setups (only different gear ratios).

I pulled a couple degrees of timing in the cells that had KR on the dyno. All seems good after my run down the highway this morning. Actually felt like it pulled harder, but the cool morning air probably helped with that Total timing in the upper rpm ranges is now 22 with no KR, vs. 24-25 w/ KR pulling it down to 22, and in some spots 18-20.

hymey

can u hear it detonating or just getting KR? I can run a lot of lead with L92s I run over 30 deg timing on 11.2:1 compression and 230s cam. Must be the tight quench Im running, L92 have a big open chamber they don't mind timing.

LSCHLEM

He discovered the KNOCK RETARD (Kr) when he scanned the ECU with his
HP TUNERS. He is running stock compression but you can still get KR with
too much timing.

NYC6

His was gone on a Mustang Dyno. Hes #'s would no doubt be higher if not on one.

How much additional HP/TQ would a ported 102 be worth? Thinking about doing one for my Vortech car.

Mez

My set up is very similar to yours but a smaller cam. My max timing at WOT is 22 degrees over 5500 rpm before running into KR. When I had the ported stock LS2 intake, I was running 26+. I also have peak HP at ~ 6300 rpm. Just thought you would like to know. My car gained 31 rwhp just by switching to the ported FAST92 vs. stock LS2.

turboffr

Yup, seems very similar. I also had the timing around 26 with the ported stock intake but was running 24-25 on the dyno. Most of the KR was around 2-4 degress (some spots it pulled 6, for 18 degrees total). The operator also said he heard it pinging which is why he stopped at 5700 rpms.

I backed out 2 degrees in the few cells where I had KR and it's gone. I'm now seeing a solid 22 degrees with no KR. Timing is actually slightly more than it had on the dyno.

turboffr

correct, I recorded the dyno run with my HP Tuners scanner so it was very easy to analyze where the timing issue was once I got home.

I had the tune pretty close but had only tuned through 3rd gear on the street. I expected changes would need to happen to the timing curve. Wish I had the time to make changes and get a few more pulls, but it was a dyno day.

Neumonic2002

I'm no expert and even that is an understatement with the knock you are getting with that timing have you looked at your AFR? could you be a little lean?
My car likes 25 degrees and a 12.5 AFR, the end result is 0 knock
I wonder what it will like when I switch to the FAST?

Enjoyed your thread, great numbers!!

turboffr

Thanks. AFR was at 12.5-12.6 according to my wideband. The dyno tailpipe sniffer had 12.8-12.9, but that's after the cats and coming out the tailpipe, not as close to the head as my wideband is.

Do you have a cam too? I think that is impacting the timing as well.

hymey

Yeah, thats how u normally no if it is getting KNOCK RETARD , from scanning.

e38s have over sensitive KNOCK RETARD.

I am not talking about knock retard but detonation, I use a head set tuning these to find knock sometimes they go off with no knock at all some cars they dont react fast enough, there all different, 22 is pretty low with stock comp on these heads.

turn burst knock off

"knock sensor threshold mult 1 to 8" should be 8 in the upper rpm region, 0.3 to 0.8 g/cyl, and 4000-8000rpm a good start point. don't always rely on KR or could leave power on the table without even being close to detonation and vice versa.

with efilive

B1967- B1974,

these are the settings in efilive, you can leave the other knock retard settings stock although limit total timing pulled to around 3 degrees and turn off burst knock.

These are the best settings for the e38, they can vary from car to car earlier os tend to be less sensitive then some of the later ls3 stuff which are a little overactive, I have found that tuning boosted LS3s they go off but the car isn't knocking not even beginning too, just from increased engine noises and vibration in upper rpm. Once you know where it gets real knock you can turn them back on and experiment with the settings more

hymey

Here is a simple but big mistake most tuners run into with e38s.

B5112, adds timing when in power enrichment in efilive scary part is its not in HP tuners theres another tip for u guys but possibly u have earlier os or even an e40

Mez

PM sent.

If you don't mind, I would like to a copy of the HP Tuner scan to compare to my dyno runs.

Neumonic2002

I still have the stock cam in this car, I have looked at the one you went with along with the 230/234 (among others).
We ran into the same thing when checking my tune last time I dynoed...the AFR reading from the sniffer was just like yours, we trusted the wideband as well.
Would you mind letting me know what combination you end up with (timing/AFR) I am sure I will be in your shoes when I finally get the cam swapped.

John