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350gt Power Problems.. Maybe

Touge Kyousou
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Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

Heya all,

Been lurking around here for awhile.. but have come across something funny with my car. Thought i'd chuck it here and see if anyone has any ideas/suggestions etc :thumbsup:

Anyways, the car's a 03 350gt 6mt with 47thou on the clock. I got the car serviced yesterday and decided to dyno it for the heck of it but it returned a rather low figure of 131 kw at the rears. Odd i thought as most are saying stock should put out around 160 at the rears.

I bought the car 2 months ago with 43 thou on the clock and since then it's had brake, engine, clutch, gearbox and diff fluid changed. The oil filter has been replaced. The car when bought, had a kakimoto regu 06 & R y pipe back exhaust installed shortly followed by a trust panel filter then a z-tube.

The car doesn't feel sluggish and in fact, feels quite fast. G-tech gives it a 5.89 time to a 60mp/h dash but 131rwkw seems a bit low for this kind of time. My previous ride was a mazda 3 mps with 180kw atw and that car only managed to post a flat 6 to the 60mp/h dash.

My next step is changing the spark plugs but i doubt that will help.. i think they come with platinum from factory that are good for upto 100 thou km's ?

Any ideas/suggestions etc is welcome!

Thanks for reading.

P.s. If anyone is around the st.george (sydney) area with a 350gt m/t and doesn't mind showing me what kind of power i should be feeling in my car (e.g. torque going up a hill/in gear acceleration), please feel free to PM me. If you'd like, you can drive my car and see if it's lacking a certain something as well.

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rs73 Grand Master

rs73

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Posted

despite the low reading but if you can still get 5.86s 0-100 then I'd say the dyno may be configured to read low. Perhaps wrong setting from previous dyno run? that can throw the figure out of whack as well. many other factor can make dyno reading varies from one dyno to another

GEXer Enthusiast

GEXer

Posted
Posted
P.s. If anyone is around the st.george (sydney) area with a 350gt m/t and doesn't mind showing me what kind of power i should be feeling in my car (e.g. torque going up a hill/in gear acceleration), please feel free to PM me. If you'd like, you can drive my car and see if it's lacking a certain something as well.

Hey mate, u dont happen to live in South Hurstville do u? west st? if so, i live just around the corner of u, u can take mine for a spin see if there's any diff to your. :)

Touge Kyousou Experienced

Touge Kyousou

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  • Author
Posted

Hey all,

Thanks for the replies :)

Yeah i was thinking there maybe was a wrong setting on the dyno.. going through the dyno sheet doesn't tell me much though, other than the usual tire pres setting, correct intake and ambient temp plus the shootout mode was correct at 6 cyl n/a. I hope it was a wrong setting. I know this dyno reads fairly well usually as i've had my previous two cars on there in various states of tune/mods and the numbers it manages to post up seems quite realistic/normal. In saying that, my previous cars were dyno'd by the main mech/owner but few days ago, it was the senior apprentice that ran the 350gt.

BLISTC,

Wow, congrats on your awesome result! Thanks for the offer, really appreciate it but i'll take up GEXer's offer as he's quite close to me.

GEXer,

PM incoming, thanks mate :D

Stephen Thorpe Proficient

Stephen Thorpe

Posted
Posted
nothing - completely stock

ill try get the dyno graph posted

was done at a dyno day this yr @ unigroup engineering in girraween

Oh, ok...

I would of thought that was a bit high, but I may be wrong.

Not by much though!

Touge Kyousou Experienced

Touge Kyousou

Posted
  • Author
Posted

Just an update if anyone is curious..

GEXer took my car for a spin and noted that 1st gear felt better than his but my 2nd gear was weaker. GEXer's v35 however, has a different diff in it i believe so it was kinda inconclusive.

Been driving it around lately giving it a bit, certainly feels more than 131kw atw, so i don't really care.. long as the car is running healthy which it seems to be. AFR check was ok.

One thing my mate spotted (he was there during the dyno run) was that it was a raining day and my car went on with wet tires, plus the person driving my car on the dyno thought it was wheelspinning (the speed did climb a bit quick.. i've thrown my cars on the dyno plenty times) so most likely that explains the low power readout.

Case closed, am happy. Under 6 sec to 60mp/h timing is repeatable too without being super brutal so i think the car is going ok.

P.s. Thanks GEXer! Really appreciate it. Btw, saw your V35 today, very nice looking!

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