KatfishRacing

iTrader: (6)

We are currently working on a 1998 A4 Z28. The owner wanted to track the results from each modification. I thought this information might help other people to estimate the gains from the mods. All of this was done on a Mustang dyno and the numbers are corrected for weather. Our altitude it 513 feet.

Modification................ Horsepower...........Torque..........avg AFR
Stock...........................299.8............. ......297.0...........12.2
K&N Filter......................304.3................. ..299.2...........12.1
TSP Lid.........................309.2................. ..301.4...........12.5
LS6 Intake.....................317.5.................. .307.1...........12.5
Pacesetter LT headers
& TSP orp......................335.2...................3 22.0...........12.7
Exhaust Cutout...............350.9...................336.1 ...........12.8

The car is on a stock tune with EGR and A.I.R removed. The car weighs 3560 with 1/2 tank of gas and no driver.

WS-Sick

Cool post. Those are some high numbers, especeially for a mustang chasis dyno. I wish I had the opportunity to dyno my car after every mod so I could track its progress.

Torqued

With exception of the last run, were all the other runs through the OEM muffler?

davered00ss

iTrader: (4)

Nice post. I did the same thing on a dynojet.

Mod........................rwhp...............rwtq
stock......................302.................312
SLP lid....................305.................316
Magnaflow cat-back.295.................311
LS1 edit after..........309.................326
Kooks headers
cated Y-pipe...........332..................342
LS6 intake..............No #'s yet..............

KatfishRacing

iTrader: (6)

yes, all the runs were done through the oem muffler except the cut out. We are installing a bassani exhaust today along with a vig 3200 converter with a lock up switch.

MikeG

iTrader: (33)

Those numbers are incredibly high for a Mustang dyno. Kind of unabelievable actually...

KatfishRacing

iTrader: (6)

The last car we had on the dyno with similar mods did about the same. Everyone doubted the numbers until he went to the track and ran a 12.3.

Don98Z

Since it is my car that the post is about, I thought that I would chime in here.
The SOTP mater definatley felt the increase on each step and the dyno proved it.
I know the other car that he is speaking of that ran the 12.3 with same mods and that is a fact. I was goign to take the car to the track last night but we were rained out. I will attempt to take it next Tuesday and get some #'s to back it up.
A word about the Horsepower factory. I have nothing but good to say about those guys. They have gone above and beyond the call of duty. When they quote a price, they stick to it even if there are problems that take more time.
They are top notch in my book!!!
If you are within a few hours of SPringfield IL, I HIGHLY reccomend checking them out. You wont be dissapointed!!!

Gloveperson

iTrader: (9)

There is no way that was a Mustang Dyno

If it is you have one MIGHTY powerfull 98 LS1 AUTOMATIC.

-Todd

SStolen

iTrader: (22)

BULLSHIT!!!! A Mustang dyno usually runs about 15% lower than a Dynojet.
-You would have to put down 412rwhp on a dynojet to achieve 351rwhp on a Mustang dyno.
-This is on a 98?? They always dyno lower than 99 and up.
-Automatic?

Someone stuck an LS6 motor in there with big duration, lift and a 115lsa cam when you weren't looking.

Grant B

Mustang dynos can be calibrated to read certain ways. I'm never operated one myself, but I've seen it done. Unlike dynojet software, you seem to be able to do anything you want to the numbers, and it doesn't show up on the printout. So I've heard some mustang dyno operators give people their "dynojet" numbers.

Anyways, there is no reason to call BS, its good info...

KatfishRacing

iTrader: (6)

The Dyno is a Mustang MD 250 that was calibrated by Mustang when we bought it new. It is not set to show "dyno jet" numbers (although it is capable of doing that) and the car was weighed immediately before it was put on the dyno.

What numbers do you dispute? The 299 stock number or the gains he has seen from the modifications? We have had LS1's dyno anywhere from a low of 273 to a high of 304 in stock form. All of the gains in this post are pretty typical of these modifications in my experience, which is why I started this thread.

If you dont like the numbers or dont believe them so be it, Im not going to be able to change your mind. The point of the post was to provide some real world information on the difference that this car saw from the listed modifications. Hopefully someone will benefit from it when choosing the mods to do to their car.

MUSTANGEATER

iTrader: (10)

Nice Numbers Mike, your customers track time backs up the dyno numbers. I need to take a trip to your dyno sometime soon. Glad to see you got the shop going well.


Floyd

Gloveperson

iTrader: (9)

No they don't. 98's and 99's will dyno the same. 00 will dyno slightly higher than those and 01-02's will dyno slighty higher than 00's.

The stock numbers on the dynojet are disputed, as are the final numbers. The gains are fine, but the numbers themselves are horribly high. If we stuck an M6 on that car and put it on a dynojet, you would have put down about 330 RWPH. That is not going to happen on a stock 98.

-Todd

Don98Z

This is the owner of the car again. I drove it to work today and it feels AWESOME with the new converter/bassani catback on it.
I was driving thru town on a dry but cold smooth road in 2nd gear (holding the shifter in 2nd) at 37 mpg, I rolled into 3/4 throttle and the car immediatley went sideways. Granted, I have 235/55/16 tires that are damn near bald, but it does feel real strong.

I was rained out last Tuesday but plan on hitting the 1/4 this next tuesday the 19th.
My goals are
1.75 60
12.5 or better
108 or better
We will see how it goes!!!
My last LS1 was a 98 formula with;
Mac long tubes
mac off road Y
hooker catback
3200 yank
lid / K&N
the car went
1.8
12.7
105
That car had 100K on it, and didnt feel nearly as strong as this one does. Who knows, but I will come tuesday. I will post in here.
Again, props to Horsepower factory as they have not only met, but EXCEEDED my expectations for price, and quality of workmanship.

xfactor_pitbulls

iTrader: (16)

I have to scream something is ******* wack. For one reason, those numbers contradict 99% of all the dyno info I have ever read. Number 2, if it is true my car sucks ***** and need to find out where to buy my "magic 98"

Brandon

davered00ss

iTrader: (4)

The #'s seem right in line with my 2000 SS M6. I have seen other 2000 SS's put down 330 with just a lid and cat-back. Just depends on the car.

Gloveperson

iTrader: (9)

You have a manual and those are dynojet numbers. He has an auto and it was a mustang. I think he used a dynojet numbers

-Todd

01TAWS6

I think the numbers look good as well. It is a good test to see how much each mod is adding. It may seem unbelievable but you have to take into consideration the variables that exist with each test.

KB99WS6

iTrader: (6)

I don't see how in the hell you possibly put down 299rwhp bone stock with a 98 AUTOMATIC on a MUSTANG dyno. No friggin way. As someone else pointed out that would be like 330rwhp on a dynojet.

Davered00SS, you arent comparing evenly. First off you have an M6 (as glove pointed out) secondly, you are talking about with a lid and a catback and thirdly you are talking about a dynojet.

This car was a stock 98, is an auto and put down 299rwhp on a mustang dyno ...NO WAY.

Whens the last time anyone seen a bone stock LS1 M6 put down 350rwhp on a dynojet? B/c thats about the equivalent of what they are saying with their STOCK numbers.

other than that, the gains look normal.