Dyno with 2.85 and Predator

[Snake-Shadow]

On Saturday I dynoed the Snake. My mods are K&N with silencer removed, 2.85 RR, Flows and The Predator Pulley Tune. All settings are left at default no change to fuel or timing. Tell me what you think...

http://members.cox.net/mwatrous/Car Pics/Dyno2.wmv

 

[Snakebite]

No disrespect Bro...but your numbers seem a bit low for your mods.:shrug:

There are guys in our club pulling over 410 at the wheels with a CAI and exhaust only.

How many miles are on your car?

 

[Snake-Shadow]

About 11K. Might be a little on the low side but I am still using the stock H and airbox...From what I am seeing if I play a little with the A/F I should be able to get a little more out of here. It is also possible I am getting slip.

 

[Snakebite]

Slip could be attributing to some loss. Check out Postban's sig for a list of his mods and numbers as a reference point.

He is running a 2.76 Billet Flow pulley with idlers and the Predator tune. He also has a Bassani Cat Back, CAI, and Billet Flow TB. He is pulling 472hp and 499 tq.

 

[Snake-Shadow]

Yeah! I have been watching his progress. But he does have a few more things then I do the most important is a custom tune from James. I should be getting a updated tune any day now.

 

[Pyro]

What octane gas are you using?

 

[wculver]

Great video!

 

[Snake-Shadow]

What octane gas are you using?

91 the same crap you got in California

 

[Pyro]

Did you get any detonation/pining at any point? Also, are you using the stock plugs?

 

[hawkls1]

this is my dyno sheet. the last run(purple) was 10%rich.I think your a little lean down low

 

[Snake-Shadow]

Did you get any detonation/pining at any point? Also, are you using the stock plugs?

Stock plugs gapped at .040 still waiting to get the IT-22. When I do get the IT-22s I will run them at .040. Had a little ping right at the beginning of the second pull then went away real fast. I chalked it up to the stock plugs and initial load.

this is my dyno sheet. the last run(purple) was 10%rich.I think your a little lean down low

I thought the same thing lean down low and rich up top. Hopefully James can straighten that out for me.

 

[JaketheSnake]

well without a intake or exhaust that seems like respectable numbers, at first i was like that was low but after seeing that you have stock airbox, it should go up

 

[RedfireVert]

Snake-Shadow - you might want to check out my thread in this forum entitled "Dyno Numbers Seem Weak". I only got 413 rwhp/409 tq with a 2.93 pulley, CAI, and predator. (no exhaust)

I think the Predator canned tune causes our vehicles to run pig-rich for safety.

A custom tune should help.

Russ

 

[Snake-Shadow]

well without a intake or exhaust that seems like respectable numbers

I do have exhaust but the airbox is still stock...

Snake-Shadow - you might want to check out my thread in this forum entitled "Dyno Numbers Seem Weak".

I did and I think you are right on the money.

 

[ALA G8R]

Originally posted by Snake-Shadow
On Saturday I dynoed the Snake. My mods are K&N with silencer removed, 2.85 RR, Flows and The Predator Pulley Tune. All settings are left at default no change to fuel or timing. Tell me what you think...

IMO you should pull some timing. That ripple at the peak torque point may be detonation. Especially with the 91 octane gas. I would also add fuel try to get the A/F under 12:1 over 4500rpm. Check out the following post for my results with the predator this past weekend.

CLICK

 

[Snake-Shadow]

IMO you should pull some timing. That ripple at the peak torque point may be detonation. Especially with the 91 octane gas. I would also add fuel try to get the A/F under 12:1 over 4500rpm. Check out the following post for my results with the predator this past weekend.

Those are great numbers and that is what I want my A/F to look like. I will be getting a tweaked tune from James at http://www.runninwiththedevil.com/ to smooth out the A/F and set it up for 91 octane.

Thanks everyone for your replies and comments.
M@

 

[Chonger]

It seems like you are running a little lean in the midrange and then very rich up top. You also have that dip to almost 10:1 A/F. Looking at the HP graph it looks like the power curve levels off at the 5500 range when it should still be climbing up. I think you are losing power up top by the tune going very rich. There is no way you will be able to correct this with the predator w/o a custom tune because adjustments can only made across the board so you can not lean out the top part w/o leaning out the midrange which you do not want to do. This is very interesting because I also had a sharp dip in the AF right at 5750 mark that cost me some power. This is the major drawback to the predator. I am running a 2.95 with the predator tune plus a 7.5% adjustment to the lean side and ended up with:

4000 13:1
4500 11.8:1
5000 11.8:1
5500 11.5:1
5750 11:1 ?????? WTF
6000 11.4:1
6500 11.5:1

 

[mystifiedworm]

Thats me driving, thats me driving!!! :-D Thanks Snake-Shadow for coming in Saturday. :thumbsup: I was a blast to be able to put faces with names. Hope to do it again before it gets to hot.

I feel that with your mods you have respectable hp/trq numbers.

Chad

 

[tigerwoods]

what rpm did you go to? that dyno run seemed a little short.
it also didnt sound like you really got on it, it sounded more like you eased into it.

 

[Snake-Shadow]

It seems like you are running a little lean in the midrange and then very rich up top. You also have that dip to almost 10:1 A/F. Looking at the HP graph it looks like the power curve levels off at the 5500 range when it should still be climbing up. I think you are losing power up top by the tune going very rich. There is no way you will be able to correct this with the predator w/o a custom tune because adjustments can only made across the board so you can not lean out the top part w/o leaning out the midrange which you do not want to do. This is very interesting because I also had a sharp dip in the AF right at 5750 mark that cost me some power. This is the major drawback to the predator. I am running a 2.95 with the predator tune plus a 7.5% adjustment to the lean side and ended up with:

Yes it is lean down low and rich up top. James is working on a tune as we speak.

what rpm did you go to? that dyno run seemed a little short it also didnt sound like you really got on it, it sounded more like you eased into it.

Thats just the poor video quality. He got on it and ran it to redline.

Thanks Chad it was cool be able to hang out at the shop and see what Xtreme is all about. Look for me to come back in and dyno with the new tune in a week or two.

M@