3.8TransAM

Well since all my cars like to break on me as of late and i dont have time to slep , i managed to sneak in on the chicago buick chapter meeting dyno pulls at ANS Performance today :-)

Had all my gear with me, Romulator, Diacom, both laptops, my burner, etc...................

Never did quite have a chance to play with my car lately on 92-93 octane(hey price gas, u wouldnt be either lol)

So i got bored waiting for my turn on the dyno and basically made up a whole bin in about a 2 hr span using what i've learned from tuning the GTA and my Formula and my friends cars as well....

I whipped it around the block a couple of times , made a change and so on...............had what i thought would work done with about 15 minutes to spare before the pull....

Mods:
SLP catback
24# SVO injecotrs
my own tuning

225 hp at 4350

and 315 ft lbs at the wheels

Printer difficultoies unfortuneately kept me from getting a readout but i should hopefully be getting it emailed to me t'row so i will try and scan it in

had a hint of knock but do to funds and time my play time was cut short but i do have 2 nice dyno runs saved on diacom so that knock will be gone next time :-)

And besides i ran with the buick guys and i didnt have the worst numbers there( i was afraid of it)

I was hoping for 210 and 300-310 ft lbs at wheels which is considered a healthy to lite modded stocker..... Eveyone was pretty floored i put out the numbers i did and i was kinda shocked by it too. Now to finish porting my other stock intake, siameses a set of stock runners, ditch the lousy factory air intake and tune the car accordingly.....

Im going for 250 rwhp with stock parts on a TPI

I know this doesnt have a lot of prom specific knowledge but the prom tuning is what got me the#'s that i have and if i get a chance im going to try and quantify it by runing a stock bin with IC change only and see the results................

And hopefully some newbies will see this and get inspired by it as well since sometimes it so hard to see results... Be diligent keeo your eyes and ears open and slowly but surely u will amaze yourself at times and totally realize how dumb u can be too, we've all been there but dont give up

Later
Jeremy
PS i need time to order all the pieces for a diy wideband arrgggh

Kat

iTrader: (4)

Nice Jermey!

What changes did you make to the bin?

Kat

FruityOne

Holy crap jeremy, I think you just met your 250hp goal. Once I get a tranny in my car I have GOT to put some money down and pay for the equipment so you can tune my car! Course, I need the right heads first. Stupid TBI 350 heads, damn reman company.

225 RWHP :hail:

I'm afraid to dyno mine now, it'll probably turn out like 180hp with the way its been running. 'Course, I'd need a working trans to dyno it now wouldn't I.

GTA91

iTrader: (1)

Not to shabby. I'm pulling 275RWHP and 330 RWTQ with a completely stock TPI motor except for the following mods:

siamesed/ported stock intake base
LT1 24# injectors
LT4 hotcam
ZZ9 valve springs
MSD6A
LT headers, ****ty catback
pretty much stock tune


*Basically its all stock except for the cam, ignition, exhaust, and the siamesed base I really need to get some tuning done to it and a better exhaust system along with a CAI and other stuff....

Grumpy

KEWL.
Nothing like happy engines, LOL.

poncho@home

not quite a dyno but I have weighed my car and with the MPHs and ETs I ran last week it puts my car in the 280 to 290 RWHP range with the carmath calculators I found on the net...I hope to up that a bit with the new ypipe that replaced the totally crappy stock one.

Mods are in my sig...

RedIrocZ-28

Poncho, you and I run really close to eachother in terms of ET and mph with my best mph this year at a lousy 100.3 and best ET again a 13.7. I have also used the calculator with the MPH but I must say that I thought that the 285 hp rating was at the crank not the wheels... if so, then RWHP is gonna be more in the 240-250 range rather than in the 310 range...

Grim Reaper

Considering that a stock L98 GTA is rated 240HP at the crank (or 245 depending on the source), 225 RWHP is extremely impressive. Typically they say around 20% loss for the automatic & power train. So your around 35 RWHP better than you should be.

And for all those who constantly ask "How much gain can I get from eprom burning", now we can tell them.

Would have been really interesting is to do a "back to back" dyno run comparing the stock eprom (except the injector sizing).

FruityOne

Don't forget though, Jeremy DOES have a SLP cat-back system. Which does raise his dyno numbers a bit over stock.

funstick

was this a dynojet dyno by chance ?

L98IROCZ89

COMPLETELY, 100% stock, except for 4.10's, LT4 HOTCAM, ignition upgrades, high flow intake pieces, long tube offroad headers with a catback, upgraded fuel delivery, modded heads.....

Yea, thats completely stock last time I checked. Sorry, couldn't leave that alone

poncho@home

From everything I have read these online calculators are giving us RWHP not CHP...

It sounds right because 285 RWHP is roughly 340 CHP...with the upgrades I have done it makes sense that I have 100 HP over stock.

When my car was bone stock it ran 15.1@89 mph in the 1/4 mile that works out to 205-215 RWHP....that sounds about right for a stock L98 with a K&N filter in proper tune, no?

The vortec heads and exhaust work has netted me 80-90 RWHP or about 100 CHP...that's exactly what I figured it would do. ALl this with a very restrictive Ypipe that I have since changed and will be testing at the track tonight.

RedIrocZ-28

Yah but if you think about it this way, a stock LT1 would net 100mph in the 1/4 which would lead me to believe that those are cHP ratings. Unless of course, they really were making in excess of 300hp from the factory when ony rated at 275. Catch my drift? Just because our ET's are lower than a stock LT1 maybe just means that we have a better bite on the track in terms of suspension setup and tires.

Edit: Poncho, I just used the hp calculator thing.

Stock motor completely: 14.9 @ 92 mph = between 221 and 225hp (1989 Iroc-Z rated at 225 cHP)

Motor with mods: 13.763 @ 100.3 mph = between 281 and 292 hp. (same car, same driver(me), 2 years later with whats in the sig.)

So I'm gonna conclude that the numbers they give you are CHP ratings.

And for the original poster, damn nice numbers my man.

poncho@home

not really...stock LT1s run in the range of low 14s at 96-98 MPHs....they are also a little lighter than my fully loaded ttop GTA which weighs in at 3560lbs without driver.

And they were possibly underrated in the HP from the factory.

Either way with a 98 mph trap speed that puts a typical LT1 in the 260-270 RWHP range....that's a little optimistic but so 98 mph in a typical LT1.

Also I beleive that my 99+ mph is a little low. I think my stock Ypipe was holding me back. I will be testing this at the track tonight.

RedIrocZ-28

Not to be in a pissing match Poncho at all, but if thats true, then I have somewhere in the neighborhood of 340 cHP right now. Why am I not running 106-109 trap speeds like the LS1 rated cars are with 340cHP?

My car FULLY loaded with me in it and the stereo equipment which weighs in at about 50lbs is 3705. Also this includes the gas in the tank. Roughly 1/2 tank or so.

For reference, esams ran a 13.2 @ 102 with a stock longblock motor, HSR intake, big convertor, and lightweight rims and tires(less rotational mass), through stock manifolds, stock heads, stock cam. So he went from 225 hp to what 375hp with a HSR intake and programming? Sorry but that cannot be the case. I bet he is in the neighborhood of 280 cHP like we are. His car just weighs less. I know what a 450 cHP car feels like, my car can't be 100 hp behind and have there be such a huge rift in the performance difference. He has all sorts of problems with his car and he runs low low 13's. I have relatively few and all I can muster is between a 14.2 and 13.7 and NO lower.

Debate I guess...

poncho@home

Thus requires less power to go faster....listen I don't really care whether it's CHP or RWHP...I was just saying that these online HP calculators are RWHP but they do make generalisations. For instance I am sure I can ET better with a Yank 3200 TQ convertor, maybe in the 13.4-13.5 range, that doesn't mean that I actually am making more power than I am now.

My car is a relatively stock street car with a tight tq convertor, stock gears and stock tranny(shift kit), stock rims and street tires. The numbers I am running at the track add up to roughly what I said earlier...how close? How the hell would I know...

Your car still weighs less than mine...with me in it 3750 full tank of gas, that's how I always race.

Either way good times overall!

The stock ones I have seen trap between 103-105, I have 3 friends with 2002 Camaros....and they know how to drive, they drag race a NHRA A Stock automatic along with another 3 bracket cars...they just bought these for the nostalgia.

The 1 Camaro SS traped 105+, with a torque convertor and tires he's running 12.8s@108 mph now...still stock motor...do the math they are severely underrated

L98IROCZ89

A bone stock (and I mean no gears, no air filters, no cat-back's, no NOTHING) dyno as follows:

M6: anywhere from 297-300rwhp
A4: anywhere from 294-298rwhp

You see that on LS1.com all the time. These numbers are consistently seen from bone stock LS1 F-Bodies all the time.... no mods, no lies. Figure typical 20% powertrain loss, that gives 350+ horsepower at the crank. So yes, I think it is a well known, proven fact that the LS1's are "severely underrated."

funstick

what type of dyno is being used for this. im not asking agian

3.8TransAM

Sorry to drag an old one from the dead :-)

Update, car has seen the track as configured for dyno pull..
(did remove the mandatory TCC lockup to 115)

Best time was 14.44 with horrible 2.2+-2.3 60' fts(street tires)
(rained nite before and we're too poor to afford them to spray the track down)

best mph was 97.02 with several other runs in the 96.5 mph range.

Weather was horrid, just ask Bruce, with the temps in the upper 80's and the humidity the same (it was really bad)

The list of mods?:
SLP catback
SVO 24#'s
My tuning(pre wideband days, have not played farther)
The rest is stock(as in factory)ask anyone who knows me

Going by what I have gotten out of it, I believe a 13 sec street tire run is possible(can usually 1.9-2.0 60's when have a good track)

happy hunting
Jeremy

Tony89GTA

iTrader: (7)

Throw some slp 1 3/4 headers in there and some better traction and you'll be in the high 13's forsure.

87_TA

Good numbers!
I just wanted to say I use Corral HP calculator and have found it to be very accurate - FWHP!
Its also very good at estimating ET from trap speed and vehicle weight given your car is effecient.
Lately I have been about a 1/10 faster than my ideal ET vs MPH.

FruityOne

He's already got a beast to handle drag duty. This is his daily driver.