I only got 315rwhp and 293rwt. This really sucks!!! They guy at the shop told me that his '00 T/A only put down 292rwhp, and a few other Z28's he tested were making #s similar to mine, so maybe the dyno just reads low or something. It was hot and very humid (typical florida weather) this may have played a small part also, I dont know. Please give me your thoughts. thanks

 

Was it a Dynojet or a Mustang dyno? I am betting it was a Mustang dyno...

 

the rwhp looks alright but the rwtq is low. never seen a close to stock ls1 put down more rwhp that rwtq. im sure its the weather. there was another thread about the tsp 231/237 cam dyno results they too were in Fl and had very low rwtq numbers even for the cam. i think it was around 390 rwhp 350 rwtq. im guessing its the weather and im not sure why it would only mess with ur rwtq though. what are ur SAE numbers?


here is the thread, must be low tq numbers out there. :shrug:

https://ls1tech.com/forums/dynamometer-results-comparisons/159407-yet-another-tsp231-237-stock-heads-9-a.html

 

Dont feel bad, my car with all the mods in my sig put out 345 hp and 330 ft lbs. Not too happy with that tq number!

 

dyno numbers dont mean **** anywho only good for a tune or to see if something is wrong with ur car. dont get to hung up on them im sure its the climate.

 

It may have been a mustang dyno, I have heard that they put out lower #s, however, I'm not really sure what the difference is between a dynojet and mustang dyno.

 

the first thing that came to mind was the fact that I switched out my resonator for a moroso spiral flow, but it shouldnt affect it that much, besides, wouldnt it affect hp more than tq? Also, my tq peak and hp peak are within 100 rpm of each other (315hp @5700 and 293tq @5600) that doesnt seem normal

 

unless his dyno graph is all outta wack the #'s sound pretty good to me i doubt highly it was a mustang dyno...youve got a lid and a loudmouth as your only mods...so as far as im concernd its pretty much on point.

lata
bill

 

thanks for all the input guys, if ya'll think it will help, I can scan my graph and post it tomorrow, it doesnt look like anyone elses graph I've seen.

 

the HP number looks fine, but the trq is definatly low. When we baselined my car with the mods in my sig i only made 328 rwhp and 326rwtrq, after a good tune i ended up making 348 rwhp and 362rwtrq. I say do some headers and get a tune. and you will be seeing numbers close to mine

 

I agree with foff667, torques a little low but with your mods 315 rwhp sounds right.

Al

 

yeah, I'm not upset with the hp #s, just the tq, my graph looks a little strange, I'm going to scan it at work in a few min. and I will post it to see what you guys think.
thanks again

 

heres the graph, tell me what you guys think. I know you cant really see the numbers, I just wanted ya'll to see how the tq increases as the hp increases, usually the tq peaks and then starts to drop off as the hp starts to increase right??
(sorry for the poor quality, the scanner at work is ancient)

 

yah its hard to tell where it peaks at...fyi on a pretty stock car such as your it should peak at around 4200-4500 and hp at around 5500ish...i never lay too much faith in dynos.

lata
Bill

 

Yup, that graph looks goofed up.

FWIW, I don't think it is the car. Could be a wrong scaler input into the dyno. The HP curve looks good though. Just the Torque curve looks all fooked up.

 

yeah, i agree, the tq curve looks bass ackwards (it peaks at 5600 & hp peaks at 5700), but if you guys dont think its such a big deal, then I guess all I can do is put my headers and tb on as soon as my ORY gets here and take it back to compare numbers.
thanks guys for your info!!

 

Could it be the "metal shavings in oil" post right below?

Seriously, those are not bad numbers, but generally torque will always be higher the RWHP on LS1s. Unless, something is wrong. I suspect there may be reading your next post that was moved.

The main thing about dynos is make sure you use the same one, and as close to the same atmospheric conditions as possible. I have seen people claim these LS1s make 345, even 356RWHP bone stock! And we all know that is BS! It boils down to what the owner of the Werk dyno on the Hot Rod Power Tour told me. "If you took your car to a dyno facility, and the numbers were low, in your opinion, would you go back? Of course you wouldn't. That is why most dyno shops tweak their dynos!" The key is go back to the same one.

It makes sense, too, think about it. I see so many ridiculous claims and even dyno sheets posted. The simple fact is, most LS1s and LS6s (that are stock) are within 10% of each other. It really doesn't matter what the dyno says, look at stock 1/4 runs of Fbodies, they are consistently the same, given a qualified driver. However, in the hands of a competent engine pro, these LS1s can really deliver the HP and Torque!

The first point was proven by my 2000 Formula VS my fairly new 2002 Firehawk, on the 2002 Hot Rod Power Tour dyno. The 2000 had a 3" exhaust system, stock manifolds and a K&N filter and was within 14RWHP/10RW ft.lbs. Torque of my new 2002 Firehawk! That Firehawk suposedly had 345HP vs what, 310! That's within 3%! And, we know the 2002 has the Donaldson air lid (Blackwing), the LS6 (2001) intake, and SLP's dual/dual catback exhaust.
Funny, those two were so very close to each other!

Joe Jill, who won the Hot Rodding Mag Engine Masters Challenge last year, with a LS6, at 550 RWHP! WITH NO POWER ADDERS! That tells me there is a lot to be gained IF you know what you are doing with valve train, heads, moving air in/moving it out, coatings, oil windage, etc. etc.! They can really boil the competition, which is what it really is about. Not, who's dyno posts the most numbers. Take it to the track and kick some Mustang butt! That's what I say.

 

Thanks for the response. This was my 1st dyno session. I was trying to get a baseline before putting on my headers and ported tb. I change my oil every 5k mi. (RP10w30) and havent had any signs of metal shavings. I drive the car very conservative, and actually havent had a chance to take it to the track (yet), so I hope theres nothing wrong with it. I did call the guy today and talk to him about it, and he said that his 2000 T/A only put down 292rwhp, so maybe the dyno just gives low readings. Guess I'll just hafta take it back after I install the headers and tb in 2 weeks and see what happens.
thanks again

 

The RWTQ on your dyno graph is unusually low. My graph starts at 2k and she's making above 300 RWTQ there. We both have 02's and there is no way that our motors are that off from one another. Your TQ dips LOWER in the midrange and then increases after it should decrease. Is there another dyno shop in the area? How does the car drive, does she feel strong?

What are the inlet/outlet dimensions of the moroso spiral flow in your I-pipe? Do you know anyone else running that muffler in the I-pipe? Speaking of which, how do you like the sound coming out with that muffler there? Did it pull all the drone out, is it just as loud?? Just curious

 

I had a spiral muffler in the I-pipe and it didn't do anything to my torque curve. It sounds good, it has a 3 inch inlet/outlet. I had zero drone and rasp with LT's and no cats.