A Dyno done on a Titan!!

[lizardking]

Found this posted on Nissan Titan forum.



Dyno'd at MTI (Motorsport Technologies Inc.) in Houston today and was very pleased; however, TQ started dropping at a 45* angle at ~4100 rpm and HP at 5000rpm. FWIW, HP/TQ curve crossed at 260 @ 5250 rpm. Power continued dropping steeply and by 5500 rpm HP was 230 and TQ was 240 - Dyno test ceased at 5600 rpm.

Peak HP: 273 @ 5000 rpm

Peak TQ: 336 @ 3400 rpm

For the record, a stock 99 Vette was:

Peak HP: 282 @ 5500

Peak TQ: 291 @ 3800

[SupraTitan]

Great numbers, just more evidence that Nissan understated the power output of this engine. Thats ends up being nearly 330h.p. and 400ft/lbs of torque at the crank. Just curious but did they run a wide band O2 sensor in your tail pipe, I just wonder how rich this truck runs a wide open throttle, and also the power drop after 5k could be a result of the fuel system going overly rich to protect the engine and allow 87 octane to be used. Can you post the sheets?

[PHOEBISIS]

Great stuff,where did you find it?
273 hp,not bad!Was this a dead stock Titan?Thanks,Charlie

[lizardking]

http://www.nissantitan.info/

[JetTech]

I would be surprised if those numbers are coming from a totally stock Titan. I know there are production variances between engines but when I had mine dynoed it maxed out at 258hp and 300TQ. Actually at the 300TQ reading it was producing 256hp. The numbers you've posted are a LOT higher especially in the torque rating. I'll be heading back to the dyno probably late next week after I get the Volant intake on that I ordered. We'll see what happens then........

If the Volant intake is an easy swap ideally I would like to run it again in stock form because when I had it dynoed the first time it only had 1K miles on it, I now have over 11K miles which will make a slight difference. Then install the Volant and put it back on the dyno for more accurate readings. I'll keep you all updated.

[JetTech]

By the way here's the print out of the hp and tq readings from the dyno test I had done at the 1K mile mark.

[PHOEBISIS]

JetForeman,didn't you have a modification?Was it your post that said the dyno guy was impressed,only a Hemi was close with something like 258hp?.
Lizardking,thanks for the tip.Those guys are having the same mpg posting as here "I'm only getting 14 mpg etc".One poor guy was getting 8-10 mpg.He finally started getting about 15 mpg once the truck "broke in" or it's control unit "learned" whatever it is suppose to learn.
Thanks,Charlie

[JetTech]

Originally Posted by PHOEBISIS

JetForeman,didn't you have a modification?Was it your post that said the dyno guy was impressed,only a Hemi was close with something like 258hp?.
Lizardking,thanks for the tip.Those guys are having the same mpg posting as here "I'm only getting 14 mpg etc".One poor guy was getting 8-10 mpg.He finally started getting about 15 mpg once the truck "broke in" or it's control unit "learned" whatever it is suppose to learn.
Thanks,Charlie

No mods as of yet. The guy who dynoed it was very impressed, the highest number he had seen from a stock hemi was 255hp and 275TQ!!

[JS02]

Does anyone know how many miles were on the truck? There was a post where new the Titan had ~250 hp and broken had ~270.
The torque numbers do seem high though.

[Ben99GT]

Originally Posted by JetForeman

No mods as of yet. The guy who dynoed it was very impressed, the highest number he had seen from a stock hemi was 255hp and 275TQ!!

Were your numbers obtained from a Mustang dyno or a Dynojet dyno?

Since you only had 258 rwhp I would assume it was done on a Mustang dyno, they generally read lower than a DynoJet. About 15 rwhp or so less.

[JetTech]

Originally Posted by Ben99GT

Were your numbers obtained from a Mustang dyno or a Dynojet dyno?

Since you only had 258 rwhp I would assume it was done on a Mustang dyno, they generally read lower than a DynoJet. About 15 rwhp or so less.

It was a dynojet dyno.

[SupraTitan]

If you have your truck dyno'd if they have the capability have them throw a wide band o2 sensor in the tail pipe. I've got a feeling that after 5k rpm's the ecu is going really rich, a reason for this could be to keep the detonation at bay running the min. recommended 87 octane, just a thought but the wide band o2 will tell the story.

[AaronC]

It could be going rich after 5k RPM but if it's gonna detonate, it's most likely going to at peak torque (which is peak cylinder pressure). Also tuning with a wideband on a Dyno won't give you the same result as driving down the road. The rollers only weigh like 2500 lbs, so your motor isn't seeing nearly the load as it does on the street and the dyno doesn't account for wind resistence either. The ideal solution is buying a wide band (plugs into existing hole for stock 02 sensor) with data logger ($400-500 for both) and logging runs in real life situations. These style wideband's are also more accurate since they are closer to the exhaust port and before the cats. My buddy has this style wideband and datalogger on his twin turbo 93 cobra. He kept blowing head gaskets with dyno tunes and finally said F it. Come to find out he was seeing 2 lbs less boost on the dyno (not as much engine load as on the street) and of course his intercooler didn't do anything on the dyno so the tune wasn't exactly dead on in the real world. Since tuning it himself, it's picked up a lot at the track and most importantly, it's proved to be very reliable. Moral of the story, I'm not a fan of dynos anymore, lol. They do have a purpose, but I take their information with a grain of salt.

These Titans sure do provide some power though! Great #'s IMO