jcollege

iTrader: (2)

Took my V last week to Broad View Automotive to get her tuned after a long tube install. I wasnt expecting crazy numbers, but wanted to get a baseline and see the difference in numbers. Also first time getting a car dynoed so it was cool to watch. Tuner wasnt too happy with the numbers, but car feels a lot better and sounds pretty good My mods are: K&N CAI, B&B 1 7/8th headers, no cats, B&B x-pipe, B&B exhaust.

Numbers Pre-tune 316hp 323tq
Post tune 335hp 333tq

bmylez

iTrader: (3)

That's a Dynojet? 335 is stupidly low. You should have picked up more than 19whp with those parts.

jcollege

iTrader: (2)

Yes dynojet, I figured the numbers were stupid low based on what others here have seen with the exact same mods. But in the end they are just numbers; will be getting it cammed and tuned again over the winter so not really concerned.

BudRacing

iTrader: (3)

With similar mods my 04 was at 370 on a July day in the upper 90's with a DynoJet. But if you're happy and nothing is wrong with it, then I guess it's moot.

jcollege

iTrader: (2)

Damn 370...did think that there would be a 40hp difference. The day I got my tuned was mid 70s with about 90% humidity..damnit now I am contemplating a retune lol.

bmylez

iTrader: (3)

Well a 316 baseline is also low. Yes, could just be the dyno, but lots and lots of people put down 335 bone stock. Motor doesn't use oil or anything else weird?

scotty2000ss

iTrader: (2)

I'd get the car to the track before you get upset with the numbers. Your ET and MPH will be the tell all.

MN_V

iTrader: (5)

^this. It's cheaper and more fun. Dynos can certainly be off a bit compared to others.

philistine

iTrader: (2)

I have similar rwhp/tq as the OP on a Mustang dyno - they're just numbers. With a header-back exhaust and CAI, my local speedshop typically sees about 365ish with an LS6. That's when they really groom it for dyno-queen numbers.

My tuner asked me if what I was looking for and I wanted something safe and esp to run a little cooler - I'm on the richer side of the AFR. Sacrificed a little HP but I don't care.

MN_V

iTrader: (5)

I dyno'd 350/358 on a mustang dyno. I trapped 113. I'll race any 385hp dynojet car any day.

itsslow98

iTrader: (18)

I made 343rwhp on a dynojet with just a cai and tune. 365rwhp with kooks and high flow cats. It wouldnt hurt to do a compression test and make sure you're good to go on that end. I'd definetly be suspect with those numbers.

demang

iTrader: (3)

I think i would be looking for another tuner. Those gains are not good. Those are the numbers you should be looking at. Not the peak numbers. You didn't seem to pick up the amount of hp you could have. Mustang dyno or not. I did 382 with only lt and high flow cats. That was on a 105 outside feel like temp with about 90% humidity.

bigti99a

iTrader: (16)

i am with others. #s are low. but the gain is low as well. i think you should see roughly 35-40hp from stock to mods at the wheels.

rand49er

Back about nine years ago, guys were seeing 20-25 rwhp gain regularly with headers and a tune. Nineteen is pretty darn close.

P-Funk

I gained about 24hp and 29tq when I did headers and a tune a few years ago. I think 19hp gain isn't too bad, but only 10tq seems low.

vmapper

iTrader: (8)

Not entirely true.
Dyno Operators can be ignorant on which C.F. to use
There are different methods of how dynos work. (e.g. inertia & Eddy Current)

vmapper

iTrader: (8)

Funny, what if that dynojet was a 224xLC model (which is eddy current - if you dont know, that is the same mechanism as Mustang dyno manufacturer)?
Guess you would lose...

vmapper

iTrader: (8)

Basically, all these comments are useless because no GOOD questions are being asked.


a) What is the Correction factor applied? Who is to say what D.A. this car was run at.. 335hp at 6000 D.A. and the value is Uncorrected would mean something completely different now wouldn't it? So, what Correction Factor was used or was there one applied?

b)which dynojet model? NOT all dyno jet models are the same (the classic inertia). I used to run an eddy current.. steady state tuning is preferred.

c) These are calibrated instruments that require maintenance, both the drum and the weather stations. Does this shop do any of this?
Time and time again i read it.. varying numbers, blah blah, its just numbers.
usually, its the operator doesn't have a clue how WinPep works, doesn't understand what correction factors are to be used or what the math is behind them, do they even know what MSL is? How is that dusty weatherstation doing?
Most variance is due to everything except the dyno itself (including a lack of understanding which dyno brand does what), which is accurate when used properly both on the value of the number and in comparison with others.

bmylez

iTrader: (3)

Virginia in October probably isn't going to have a DA of 6000, but I get what you're saying.

MN_V

iTrader: (5)

I understand what you're saying and fully understand there are eddy current dynojets. My point was simply to focus on the street manners and perhaps get a second dyno's opinion before getting too worried about things. My reference to the '385' hp figure was from a guy I raced once. I won that one...