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My Bro's S14 Dynoed.... Now Crappy

blackprincegts

By blackprincegts,
in Engines & Forced Induction

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Busky2k Veteran

Busky2k

Posted
Posted

Thats a terrible power curve despite the boost being consistant. I advise you to get an ECU as your next mod without a shadow of a doubt. (Seems the ignition timing is wacko in the top end as the AFRs aren't too wonky)

nissanmanS12 Enthusiast

nissanmanS12

Posted
Posted (edited)

Oh yea completly agree, its very smooth and power gain is quik compared to my stock reading..

JanuaryS14DynoSmall.JPG

I dont understand tho, not bragging or anythn but lastnite (on private property) got a drag between a Ceffy, VS SS and me..

i could toy around with the SS and i pulld past the ceffy quite easily also..

My S14 on road dusnt seem to be lacking tha performance... it feels like 160rwkw car!?!

Also im not just a dyno queen either... i am after a balance between outright power and response, especially for a road car... 250rwkw at 7,000rpm is nuthn without response...

Edited by nissanmanS12
Overcenter Rookie

Overcenter

Posted
Posted (edited)

You guys have one hell of a site here 1st and foremost. I have had an R33 GTS-t in my shop here in the states and I have been reading thru this site a bunch. We mostly do SR stuff at the shop so I thought I would put my two cents in on this post.

To get a curve that looks like yours you have something else going on other than just the ecu. We regularly run S14 SR's up to 12-14psi on all stock bits (maf, 370cc’s,ECU). Our A/F ratios stay in the mid 11's. What kind of spark plug gaps are you running?

I agree that changing out the ECU to something you can tune is huge benefit and throw a set of 550cc's in there and you will make some good power. On my personal S13 I made 330 whp and 280ft/lbs @ 16psi on a S14 SR turbo, 264 cams, AEM EMS, 850cc's and a Greddy plenum. These numbers are from a DynoJet, what can I say it’s the silly Yankee standard.

If I can help in any way let me know. I feel obligated after I have shamelessly pilfered a bunch of good info off this site.

Edited by Overcenter
nissanmanS12 Enthusiast

nissanmanS12

Posted
Posted

Yea i had sparkies gapped to .7 i think, i was going to chek them cas i thort that they mite be gapped wrong..

but if they wer gapped wrong i wud expect sum type of misfiring to occur, expecially up top end..????

Cheers guys!

gtst25 Proficient

gtst25

Posted
Posted

Everyone's saying here get an ecu BUT what about your stock intercooler? Your sr won't like the hotter intake temps - especially with the stinking hot weather atm. Intercooler kits are so cheap these days. I say intercooler and apexi pfc. 1 degree increase in intake temps = 10 degrees exhaust temp rise - so with intake temps up 40 or 50 degrees over the norm it won't be happy.

Cheers

Overcenter Rookie

Overcenter

Posted
Posted (edited)

Good point on the intercooler. I have pressure-tested stock side mounts and guess what they leak over 10psi 8 out of 10 times. So if he is loosing air all ready accounted for, it will be rich.

We run our plug gaps tight .021" (.53mm), we have only gained power by doing this, never lost.

If you are running a stock side mount it's time to scrap it. The new Greddy M spec stuff is nice, all the piping is identical to the V & R spec. I like it better than the HDI stuff and the price is comparable (in the states at least).

Edited by Overcenter
nissanmanS12 Enthusiast

nissanmanS12

Posted
Posted

Yea im beggining to think that HEAT plays a big part init... but still really dont explain the low AFR.. except wat OVERCENTER is sayn bout leakage.

I relise that the stokie cooler is really crap, especially for the AUS climate..

I was some reason wanting to see what i cud push at the wheels using the stock cooler, but i guess with such hot weather its near impossible to break my 160rwkw mark with the stok cooler.

CHeers!

(mite i add that SAU has been VERY helpful, which i appreciate very much, as has BUSTY2K :blink: lol )

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