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-5's Vs Rs's On A Larger Then Stock Motor

Piggaz

By Piggaz,
in Engines & Forced Induction

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Rolls Grand Master

Rolls

Posted
Posted

Dyno's don't read time, they read rpm vs power (or variants of that). You can see the power under the curve, but you can't really tell the actual response time of the setup.

Good point if you are locked into rpm.

Surely you could set up the bottom axis as time though? I guess some of the old software is probably limiting but it would be a very simple calculation for the people who make it.

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HYPED6
HYPED6

Here is my little story. I have been wondering the same thing the last 6 months or so. This is what I have found. I bought my gtr with plain bearing -5's. Now with Cams, 10.25 @ 292 Good after mar

JAGR33
JAGR33

Did you put your car on a 4wd dyno? That usually shows a lower figure than in 2wd mode. I can understand your frustration but let me tell you this, don't take dyno figures as gospel, they are a tunin

R31Nismoid
R31Nismoid

Nothing I haven't told him on 3 occasions now since Aug 2010, even earlier it think. So basically what you are telling us is that 6 months down the track. You haven't taken it to the track yet? O

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Nee-san Grand Master

Nee-san

Posted
Posted

oh, yes those pics on RHD are the correct HKS front pipes. one thing to note, they are quoting ID as 70mmX2 and single 85mm. most other places seem to quote OD which makes these approx 75mm X2 and 90mm single when comparing to other exhausts. I'll still measure mine this weekend, but those are the ones. best front pipes I've ever seen. have flex joint, have very, very nice welding, flanges welded on the inside, good quality stainless, extra thick flanges to help stop distortion and etc etc. they are the goods.

Baron,

Just bought a set of front pipes (possibly Top secret drag)

They are 75mm ID into over 100mm ID merge, Coupling this with a pair of Midori Dumps, would this not be a better front front half for a GT-R ?

N1GTR Grand Master

N1GTR

Posted
Posted

What an interesting time for this thread to get bumped to the top, only a couple of days before someone is doing -5's on a stroker motor. That timing is such a coincidence its not even funny

Nee-san Grand Master

Nee-san

Posted
Posted

Haha. Interested in a set of GT RS's? Going cheap :thumbsup:

Haha,

Thanks for the offer but I'm looking at the same thing as you (-5's) But I only have a little 2.64 odd Litre to play with unlike you big Forklift boys :D

Waiting for my 044's to show so I can finish the fuel system !!!

Marko R1 Grand Master

Marko R1

Posted
Posted

3.0>2.8.

That is all.

haha paul - were u really that impressed with my rb2630 :)

i now have an rb26 & i personally wouldn't do another rb2630, the car becomes a 'chop shop' & besides that, rb26 revs much nicer & howls when compared to the 3ltr

i also think though, either stick with the rb26 OR if u want larger displacement go straight to a 3ltr or larger :)

Piggaz Grand Master

Piggaz

Posted
  • Author
Posted

Is that like 32>33?

Yeah right! :nyaanyaa:

haha paul - were u really that impressed with my rb2630 :)

i now have an rb26 & i personally wouldn't do another rb2630, the car becomes a 'chop shop' & besides that, rb26 revs much nicer & howls when compared to the 3ltr

i also think though, either stick with the rb26 OR if u want larger displacement go straight to a 3ltr or larger :)

I have said it before and I will say it again.... After driving your car (and I have since driven Steveo's) you would be silly NOT to go that way. They rev, they do everything a 26 based block does... just better. You only have to butcher the car if you have a 32... the other two is no real issue.

I will say this though... if you have the engine out and WANT to keep the original block you have rocks in your head by staying the standard stroke crank. 77.7 mm at the very minimum. It makes the car so much nicer to drive!

Nee-san Grand Master

Nee-san

Posted
Posted

Something I do notice is that not alot of people take advantage of the 26 bore stroke ratio, so realistically for alot of people going the 3.0 litre for lazier power is indeed a good option, particularly if you are beginning a rebuild.

There are lots and lots of very fast 2.6 litre cars though, some of the fastest in the world even.

Piggaz Grand Master

Piggaz

Posted
  • Author
Posted

Something I do notice is that not alot of people take advantage of the 26 bore stroke ratio, so realistically for alot of people going the 3.0 litre for lazier power is indeed a good option, particularly if you are beginning a rebuild.

There are lots and lots of very fast 2.6 litre cars though, some of the fastest in the world even.

Racecar is different. For the street a nice fat twist curve rules... Can't always have 5k + on board.

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