Ran my 98 Formula on the Dyno at CarCraft
07-23-2014, 05:57 PM
#42
TECH Addict
I dont know anyone nor have seen anyone here in arizona dyno a stock 98-02 trans am or camaro and put down 300 rwhp lol where on earth are you getting this info from ?I hate the DA's here in Tucson. Even on a cold dry day it's over 3K DA. Annoying. Phoenix does fare much better, between 1500-3000 ft DA better depending on the day. I've seen DA's in Phoenix get down to about 1,000 and in Tucson the lowest I've seen was 2,400. The worst I've seen in Tucson is over 7K (right now it's 6868 ft DA).
I was there at Car Craft, parked right in front of the dyno. I didn't happen to see your car up on there, but I may have been walking around or something.
The dyno is a Dynojet mounted on a trailer. It's the old Andy Wicks 'Dynotune' setup. Andy sold it last year to this company called Powerhouse. The numbers they were giving out were STD corrected, just FYI.
Can you post a picture of the graph? Could be that the low numbers are attributed to the stock MAF being faulty or dirty (very common on these), and/or a bad tune in the pcm if it was tuned previously by someone.
I know a couple local guys in the tuning field that could fix you up if you're interested.
The dyno is a Dynojet mounted on a trailer. It's the old Andy Wicks 'Dynotune' setup. Andy sold it last year to this company called Powerhouse. The numbers they were giving out were STD corrected, just FYI.
Can you post a picture of the graph? Could be that the low numbers are attributed to the stock MAF being faulty or dirty (very common on these), and/or a bad tune in the pcm if it was tuned previously by someone.
I know a couple local guys in the tuning field that could fix you up if you're interested.
07-24-2014, 08:56 AM
#43
Don't assume Dynojet = generous dyno. The last Dynojet I saw used was hurting feelings bad. There was a 243 headed mid size cam full bolt on Fbody with manual trans that made under 400rwhp. The dyno was a consistent ~30-35rwhp low for every car we strapped down.
OP: your dyno graph looks very rough for a smoothing 5 graph correction. I would start by checking plugs and wires, but would definitely lean to something being not quite right. I've also seen a good number of stock cars with messed up cams or bent pushrods and weak valvesprings but those are going to be much more difficult to find and repair so start with the easy stuff.
Last edited by thunderstruck507; 07-24-2014 at 09:01 AM.
07-24-2014, 10:37 AM
#44
Teching In
Thread Starter
Join Date: May 2014
Location: Minnesota
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
The only LS1s that only make 305 at the flywheel are ones that have something wrong with them. GM under rated the engines to sell add on "ram air" packages that did nothing and make the Corvette look better on paper. This is a well known fact. Unless you think the Corvette exhaust manifolds are worth 40+hp over the f body manifolds, I'm not sure why you doubt this.
Don't assume Dynojet = generous dyno. The last Dynojet I saw used was hurting feelings bad. There was a 243 headed mid size cam full bolt on Fbody with manual trans that made under 400rwhp. The dyno was a consistent ~30-35rwhp low for every car we strapped down.
OP: your dyno graph looks very rough for a smoothing 5 graph correction. I would start by checking plugs and wires, but would definitely lean to something being not quite right. I've also seen a good number of stock cars with messed up cams or bent pushrods and weak valvesprings but those are going to be much more difficult to find and repair so start with the easy stuff.
Don't assume Dynojet = generous dyno. The last Dynojet I saw used was hurting feelings bad. There was a 243 headed mid size cam full bolt on Fbody with manual trans that made under 400rwhp. The dyno was a consistent ~30-35rwhp low for every car we strapped down.
OP: your dyno graph looks very rough for a smoothing 5 graph correction. I would start by checking plugs and wires, but would definitely lean to something being not quite right. I've also seen a good number of stock cars with messed up cams or bent pushrods and weak valvesprings but those are going to be much more difficult to find and repair so start with the easy stuff.
I see what you mean about the power level being inconsistent. I will definitely had to tune her up.
if anyone has a pic of there dyno sheet. could you post it please?
thanks again for all the info guys!
07-24-2014, 03:11 PM
#45
TECH Addict
On a side note, I'm wondering how it actually drives. With the curves looking so damn similar and the power drop equal across the entire RPM band, I think the dyno operator had the RPM's calibrated incorrectly. Are you an M6? Was it in 4th?
07-25-2014, 11:23 AM
#47
Teching In
Thread Starter
Join Date: May 2014
Location: Minnesota
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Here's one from Drag times. Not much info other than 2002 Camaro SS bone stock (unknown trans - probably an M6). It looks almost identical to yours, but 25 hp higher across the board. This graph is from a dynojet and SAE corrected smoothing at 5.
On a side note, I'm wondering how it actually drives. With the curves looking so damn similar and the power drop equal across the entire RPM band, I think the dyno operator had the RPM's calibrated incorrectly. Are you an M6? Was it in 4th?
On a side note, I'm wondering how it actually drives. With the curves looking so damn similar and the power drop equal across the entire RPM band, I think the dyno operator had the RPM's calibrated incorrectly. Are you an M6? Was it in 4th?
07-25-2014, 11:27 AM
#48
Teching In
Thread Starter
Join Date: May 2014
Location: Minnesota
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
07-25-2014, 11:43 AM
#49
TECH Senior Member
iTrader: (2)
Join Date: Aug 2012
Location: Howell & Fenton MI
Posts: 11,145
Likes: 0
Received 15 Likes
on
15 Posts
The only LS1s that only make 305 at the flywheel are ones that have something wrong with them. GM under rated the engines to sell add on "ram air" packages that did nothing and make the Corvette look better on paper. This is a well known fact. Unless you think the Corvette exhaust manifolds are worth 40+hp over the f body manifolds, I'm not sure why you doubt this.
Don't assume Dynojet = generous dyno. The last Dynojet I saw used was hurting feelings bad. There was a 243 headed mid size cam full bolt on Fbody with manual trans that made under 400rwhp. The dyno was a consistent ~30-35rwhp low for every car we strapped down.
OP: your dyno graph looks very rough for a smoothing 5 graph correction. I would start by checking plugs and wires, but would definitely lean to something being not quite right. I've also seen a good number of stock cars with messed up cams or bent pushrods and weak valvesprings but those are going to be much more difficult to find and repair so start with the easy stuff.
Don't assume Dynojet = generous dyno. The last Dynojet I saw used was hurting feelings bad. There was a 243 headed mid size cam full bolt on Fbody with manual trans that made under 400rwhp. The dyno was a consistent ~30-35rwhp low for every car we strapped down.
OP: your dyno graph looks very rough for a smoothing 5 graph correction. I would start by checking plugs and wires, but would definitely lean to something being not quite right. I've also seen a good number of stock cars with messed up cams or bent pushrods and weak valvesprings but those are going to be much more difficult to find and repair so start with the easy stuff.
07-26-2014, 12:00 PM
#50
12 Second Club
iTrader: (7)
Join Date: Nov 2004
Location: Nashville, TN
Posts: 271
Likes: 0
Received 0 Likes
on
0 Posts
Some good advice in here but being the guy said it was a new motor I would be suspicious. I know of two guys here locally that bought ls1 cars with new motors that ended up being 5.3 truck motors with ls1 intakes on them. I would check your head casting number and confirm you have an aluminum block. That power wouldn't be far off what a 5.3 would put down.
07-30-2014, 07:46 PM
#51
Teching In
Thread Starter
Join Date: May 2014
Location: Minnesota
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Some good advice in here but being the guy said it was a new motor I would be suspicious. I know of two guys here locally that bought ls1 cars with new motors that ended up being 5.3 truck motors with ls1 intakes on them. I would check your head casting number and confirm you have an aluminum block. That power wouldn't be far off what a 5.3 would put down.
I know he paid $1200 for a used long block, ( I have the paper work).
I know what the prices of a used long block would be for both a LS1 and a 5.3 or a 5.7 gm motor, and they are both off. He did build it in 07, so prices could have been different at the time.
When I get the info needed I will post it.
08-06-2014, 07:58 PM
#52
TECH Fanatic
iTrader: (3)
Join Date: Feb 2009
Location: Highland, MI
Posts: 1,366
Likes: 0
Received 0 Likes
on
0 Posts
27X is a little low but considering the climate, auto?, no fans, no info on the mechanical condition, it's not surprising. You would be surprised what hot IAT (actual or heat soaked) temps can do to dyno numbers.
The old engine in my 99 TA basically stock in sludged up condition only put down about 289 with a dyno tune in 2nd gear. After a 98mm lid and 85 mm Maf only made 296. Car ran a 13.4@105 w/ 2.1. Corrected time was 13.1@108. I've seen quite a few M6 cars pull 340-350 with bolt ons on this dyno.
The old engine in my 99 TA basically stock in sludged up condition only put down about 289 with a dyno tune in 2nd gear. After a 98mm lid and 85 mm Maf only made 296. Car ran a 13.4@105 w/ 2.1. Corrected time was 13.1@108. I've seen quite a few M6 cars pull 340-350 with bolt ons on this dyno.
