tigertim20

Got the C5 M6 tuned today. Ive put on speed eng long tubes, and cat delete x-pipe with Borla atak axle back, and vararam B2 air intake and air bridge. got tuned to suit today, and biy can you notice a seat of the pants difference, really happy with the outcome.

Not sure what to make of the dyno print out - which says 707 Nm torque - seems high.

but definitely super happy with the tune!

Verrückt ZR1

707 Nm = ~521 ft/lb. Definitely something off with that dyno. Still, I'll bet the car sounds amazing and is so much more fun to drive. Congrats.

Arvalo

How much did you pay for your tune? I got a quote today from a local shop that does a lot of work on vettes, $650.... I’m uh....feeling that’s a little steep.

Verrückt ZR1

A little steep. How much dyno time is included? Prices range from $400-$700. (I paid $500)

tomikem

$800 in Vancouver, BC, area.

Evil-Twin

there is no way that with those mods are going to see 520 ft/lbs at the wheels.. A stock C5 see about 290 hp at the wheels.. but then there are the different flavors of Dynos, The Most accurate a double drum Mustang, or the more customer friendly and generous single drum DynaJet. There are several portable dynos out there whos output is only useful for upgrade to baseline comparisons.. it takes a lot of mods to bring about a 230 hp gain at the wheels. Certainly not from a set of ;long tubes , no cats a muffler swap and a vararam.. I see about 100 / 120 max.. hp here. or 390 to 410 hp tops.

walleyejack

you are being generous with those numbers Evil, usually need a have decent cam with those mods to get 100..
i m thinking maybe 40-50 with what he has done, but i m no expert. But i have done a lot of swaps on cars..

Evil-Twin

the tune is the biggest deal here.. Ive seen30/ 40 hp from just a tune on a stock C5 on an oxygen rich sea level tune.. A C5 comes with a rich ftune from the factory for engine safety.. a good tuner can turn that rich tune into HP. I was being generous as not to offend the OP too much. The embarrassment of a "wahoo "... and the gullibility are pain enough... But then its possible he might think that " We " are the gullible ones.
Just my observation.
Bill aka ET

Not4spd

That's how much mine cost and put down 400rwhp with full exhaust and intake.

USAZR1

An stock LS6 might get close to 400whp, with those mods, but a stock LS1 won't.

lewislgZ06

^^^^^^^
I agree, and based on my experience I’d say closer to 40rwhp gain with the mods listed.
But, main thing is that the Op is happy.

02torchred

500 rear wheel torque would indicate it being dyno'd in 2nd gear or even 1st gear as opposed to 4th, the 1:1 ratio

The stronger 405hp 02 Z06 dynos at ~350rwhp stock, in 4th gear

tigertim20

You must not have read the whole post?
I said I was happy with the improvements that could be felt by driving, (Hence the 'wahoo, it goes a little bit faster)
and I also said that the torque seemed too high.

The HP number was about right but I didnt bother posting that as it wasn't important. - I only mentioned the torque because, as I said, it seemed high (I didnt bother converting the NM to foot pounds to check against other peoples results)

seems your 'gullible' comment was premature.

Verrückt ZR1

Evil-Twin

On an internet forum you find all types of people... You posted in this forum. If your tuner told you or showed you a read out that converted to 520 ft.lbs of torque, he lied to you...as far as seat of the pants goes. most people with a good seat dyno can tell the difference in their car from summer to winter where cold dense air can increase engine output by as much as 15 HP.

I saw where you said it seemed high.. I saw where you said you were happy.... both good things...… A tune will do that... the numbers you posted or the tuner told you is where the gullibility comes in.. seeming high would be gross understatement. Not knowing how to convert Nm. to ft/lbs in 2019 is thin soup. I posted that the examples of modification does not come close to the numbers you offered..

My comments where for you and for others who's automotive experiences may no be average. Kind of a buyer beware of tuners who will lie to you, and for others who might think that a few mods could get you to 500 plus torque If I offended you with the gullibility comment , I apologize. In my 18 years here I have seen many people come here boasting of Hp gains from few mods.. ( they were lying )… sometime people come here to test the gullibility of the members here. To some people just the idea of taking your car to be tuned, automatically makes you feel good even if the tuner did nothing. I have a very close friend and tuner who was only able to extract about 10 hp from the factory tune. He has the most accurate dyno out there a Mustang .He tells me everyone is happy after he tunes their car ( Its called sensation ) even id its only 10 Hp. Some times going to the doctor makes you feel good even if he did nothing. I dont know what you paid for the tune, but you were taken because one of the things you get with an honest tuner is a baseline... A point to which you can measure any further gains from additional modifications.. without an honest base line, how would you feel if you added a cam and got another dyno to compare and an honest tuner gave you a read out that said with the cam and tune you now have 480 FT/lbs ???? and you just spent 3 grand to add the cam and tune.
Again I apologize if I offended you but its the tuner that really offended you

Bill aka ET

tigertim20

Crikey! that was a rant.

I'm new to corvettes but not to dynos and tuning, so no need for lengthy explanations.
They did do a baseline, (again baseline torque was high, but baseline hp looked about right.

Perhaps I didnt use an excitable enough word to satisfy you, bit high, too high, ungodly high, monstrously high, you seem to be really fixated on the semantics of my word choice which is a bit 'weak sauce', after all i said it was high, so relax!.

If it clarifies anything it came out at 251.5 kw after the tune.

The tune added around 19kw over the baseline (baseline was with mods on, I didnt bother taking it in for a total stock baseline)

Perhaps this clarifies things a little for you.

ZigZag

Where are you located Australia ? Fill out the rest of your profile please.

Forcedvert

The torque number you reported is way off, the tuner would have known that.........

it makes me wonder about the whole thing....

Your car, your call but I would want a accurate report.

Jmho

Vetteman Jack

Here we go again - I would advise that the comments be toned back before this thread is history and this devolves into a real pissing match that won’t end well. Disagreements can be made without escalating to insulting remarks.