I decided to put on all my mods before I went to the dyno since I would have to drive 3 hours to get there. So I was pretty much going to see if my tune was safe...safe indeed just like I asked! Thanks Johnny!

Here's my mods:
-FTVB
-JLP Forced Induction
-4# Lower pulley
-Apten Ported Eaton
-Denso IT22s (gapped at 0.40)
-JLP Tuned Predator (tuned for 91 octane and the mods above, actually run on 93 octane)


This is my first run after maybe 10 min cooldown off of street (200+ miles before getting there)


This is my last run of 3 with another 10-15 min between runs. I bumped up the timing as much as the predator would let me (per Johnny). As you can see it didn't change much I guess because of the tuning for the 91 octane? Or maybe the heat?

Seeing these numbers as low as they are I really wish I had dynoed my truck stock because they seem alittle off from other guys with my combo. I'm not going to completely rule out that it's low because of the octane adjustment or asking for a safe(basic) tune. She definately feels stronger and the whine now is b!tchin loud!

What do you guys think?

 

Looks pretty safe, but you should definitely be in the 400/500 clubs with a 4# and ported blower. The 91 octane sucks

 

Remember to compare apples to apples as much as possible. Lots of guys post STD numbers. If you did STD, you'd be probably over 410 HP. That said, your setup feels a little low but not by a lot. I'm seen numbers close to yours without the ported eaton and I would bet there is a lot to be gained in a updated tune.

-Mark

 

Ya I was expecting atleast 415 out of my setup, and maybe 420-430 with a strong tune on 93 octane and a cooled down engine. If anything this gives me a pretty good idea what I'm actually putting down on the street when I drive it and it gets hot. Oh well I'm gonna see what Johnny has to say before I go any farther. Thanks guys.

Anyone have any guesses at how much difference 93 octance makes compared to 91?

 

I'll do you one better -- an actual answer.

And that answer is: None.

An engine needs X octane to avoid detonation. If that octane is 91, then putting 93 in won't help one bit. Enough octane is enough.

Actually, the higher the octane, other things being equal, the lower the energy in the fuel, as the anti-knock additives don't burn.

The reason that higher octane equates with more power is that you can run more timing or more boost. But since the timing and boost were fixed in your tests, more octane will not giveyou any more power.

 

Thanks Tim for your reply...I was able to change the timing alittle bit (not sure what my before timing was but I added the +10% that the predator allows). As you can see though it hardly made a change besides in my A/F ratio.
Maybe I should just stop trying to go for the numbers and just enjoy my stronger and safe truck...although it would be nice the be in the 400/500 club

 

I got 415/505 with 4#, chip, and Apten blower SAE on a very conservative tune. Tune makes a big difference. That's why I am going to get mine tuned on the dyno very soon.

 

That was tuned for pump gas? Also do you know off hand what your A/F ratio and timing was? Also how cool was your engine when you did that pull? Thanks!

 

u can see my mods in my sig pic. I just sent my chip off to Sal last week to get reburned... he sent it back to me and I have yet to get back to dyno to see where I stand now... hopefully it added just a little...

but I get my dynos done at the same place u do... speedworks... and after my port job, on my 3rd run on the dyno, on a warm day I did 398hp.... the first 2 runs i had a crimped vac hose and only was getting like 5lb boost and 301hp... lol

so im pretty sure im in the 400hp club, but just an idea cuz it seems like we are pretty close on the mod list

 

Thanks for your reply Scott. Ya it does look like we have the same mods...just from different vendors I thought SAE numbers were supposed to correct for things such as heat and humidity, but ya it was a pretty warm day on Friday.
Let me know if you get any gains out of your reburn though? BTW what exactly did you get it reburned for?

 

well to be honest, im not really sure what Sal did on the reburn... the original burn was set for just a 4lb and 90 mass air... well iv added the ported blower, TB, etc and had him do a reburn..... i dont really notice a huge power increase.... but it does seem to just drive a little smoother.... ill try and get to SW this week and let ya know

 

93 octane pump gas. A/F was in the low 12's and 11.8 at the end of the pull. I think timing was 14 degrees, but not super sure. I was actually expecting about 425 based on the dyno before that, but fell short probably because I got a reburn before the Apten. It was about 40 degrees outside that day and the truck prob sat 1/2 hour with the hood down before getting strapped down. I drove an hour to get to the dyno.

 

Scott,

Ya let me know what you end up with after you go...should be a pretty good comparison since we have the same mods and the same dyno.


Fractal,
Sounds like you had decent time for your truck to cool down...especially with the colder ambient temperature. Also are you saying you haven't gotten a reburn since you put the Apten on? Do you think you would see much difference?

 

I dynoed at 398 STD before the Apten. Then while it was being ported I got a reburn to compensate. Ended up with 415 SAE afterwards on a very safe tune. That number will change soon though.

 

Going to add more timing?



OR better yet nitrous!?