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Discussion Starter · #1 ·
So I'm currently Litchfield stage 2.

Am I right in thinking that to get to stage 4 I just need 1100 injectors + Induction kit?? And whats the cost involved? Dont mind going 2nd hand route.

1100injectors? £600???
Induction? £300??
Remote Remap £250??
Fitting cost??


and 4.25 is just + downpipes?

Downpipes £300?
+ fitting??

Dean.
 

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Hi, I***8217;m in same position as you and I***8217;m going to stage 4 in 2/3 weeks time. I***8217;ve got russ fellow y pipe and kn drop in air filters at moment. All I***8217;m doing is getting ansu 1050 fuel injectors fitted and a remap, been told induction kit isn***8217;t really needed as already got kn drop in air filters. And your right 4.25 is the downpipes being replaced taking out the cats in original ones and most people just get straight through downpipes, ( when I was looking was advised to make sure if I went down decatted downpipes route to make sure they had cast ends on them) , but a lot extra work and it***8217;s a lottery if the studs break when doing downpipes so I***8217;m leaving my originals on. Plus side will still pass mot , the down side it won***8217;t sound as loud as decatted downpipes
 

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2 to 4

I was at Litchfield yesterday having PS4S's and the handling kit fitted. I'm currently at Stage 1, but Ian said to upgrade to Stage 4 (keeping my standard exhaust) was £1800 all in. Stage 2 to 4 should be the same price.
 

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Discussion Starter · #4 · (Edited)
So....

I can use 1000cc+ injectors (I wont ever go beyond 4.25)
Herman....Dont you also need the larger bore air intakes with the standard air boxes+KN???
My Exhaust is only 76mm as well with Miltek Y Pipe.... looking at most of the tuning pages they offer 102mm exhaust with stage 4 and above??

Also anyone had any luck with the Japspeed Sports cat downpipes?? I assume i'd lose probably about 10bhp over a decat but not too bothered about that as I don't have a Catted Y Pipe to change out for MOT's and cba with the chew tbh!

Thanks for replies so far.
 

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i had mine in a few weeks ago for fitting the dp's (i supplied) remap (stage 4.25) and a service think it was around £1400 off the top of my head!
 

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Discussion Starter · #6 ·
Hi, I’m in same position as you and I’m going to stage 4 in 2/3 weeks time. I’ve got russ fellow y pipe and kn drop in air filters at moment. All I’m doing is getting ansu 1050 fuel injectors fitted and a remap, been told induction kit isn’t really needed as already got kn drop in air filters. And your right 4.25 is the downpipes being replaced taking out the cats in original ones and most people just get straight through downpipes, ( when I was looking was advised to make sure if I went down decatted downpipes route to make sure they had cast ends on them) , but a lot extra work and it’s a lottery if the studs break when doing downpipes so I’m leaving my originals on. Plus side will still pass mot , the down side it won’t sound as loud as decatted downpipes
Can anyone confirm or deny this???

I suspect you need full intakes to get the quoted power figure but if its not needed to reach the 640bhp mark then its a no brainer!
 

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Serious question - do you really notice the difference between stage 2 and stage 4? It***8217;s only 40 bhp or so
 

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Discussion Starter · #8 ·
Well.....I know what your saying but I'm getting kinda bored of the GTR now....had it nearly 4 yrs...I was gonna sell but cant get the APR i wanted on a loan so trying to make things a bit more interesting again.
 

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Hi, I***8217;m just repeating what my runner told me. He said one his customers stopped his after market intakes off and put standards boxes bk in with kn air filters, think it was something to do with what country he was travelling to and going to be there a while, and he reported that that he didn***8217;t notice any difference in performance after dropping them?? So I thought if I don***8217;t need to spend out the cash then why bother?? If for some reason it turns out to be in true it***8217;s not hard to put intakes on afterwards a***x1f44d;
Maybe somebody else can confirm or deny it it is true or not?? Be good to know..
 

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Massive, massive difference between stage 1/2 and stage 4.25.

Ive had 3 GTRs - Stage 1, Stage 4.25 and a Stage 2, which I paid to get the Stage 4.25 Conversion 2 weeks ago from Litchfields. The difference is night and day, even though on paper it might not seem much. The GTR feels like a brand new car.

To the OP, the only difference between Stage 4 and Stage 4.25 is the addition of decat downpipes (in the 4.25 package). This technically makes your car not road legal (as there are no catalytic converters at all) and your GTR will smell like fuel, however the GTR sounds phenomena with the decat downpipes. There***8217;s a massive sound difference and a huge increase in turbo noise with the decat downpipes. Also, you can easily put the original y-pipe back in and it***8217;ll pass an MOT and become road legal again.

Also note, that Litchfields will only fit their items, so you***8217;ll have to pay what they quote, unless you buy what they approve/use in their Stage 4.25 package (e.g. Litchfield air intakes, Milltek downpipes, ANSU 1050cc injectors, etc).
 

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I went from stage 4 to stage 4.25 and the noise difference very noticeable! As said above it sounds amazing when flat out and the increase in turbo noise is great too :D
 

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Thread resurrection. Now that I've had standard, stage 2, 4.25. 4.33 :) (Superstock intercooler) and limit of road grip at 1000bhp and 850 torque gonna add my two penny's worth.

I think looking back Stage 2 is now my sweet spot.

1) No upgrades makes the GTR fairly stale due to its weight
2) 4.25 is good if you like the better sound, Yes there is a difference in speed but not as much as say the stage 2 from stock where there is a real marked difference
3) At stage 4.33 its the best for maximum pleasure without as much concentration. E.g. put your foot down and go and don't worry 'too much' still very quick
4) At the 1000bhp/800+ torque it (for me) is frightening not in an unsafe way (well could be if you don't focus) but in the acceleration/concentration, it 'never' stops till your way off road limits and you have to concentrate straight ahead. It's really really like a rollercoaster and very similar or better than a Tesla at the start but then doesn't end.

So if I was going to use for Road only I would go maybe stage 2 (with exhaust, filter and ECU to up the sound a bit but not scare the neighbours and reduce drone) and if track is done through year then the 1000bhp.

Just my two penny's
 

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I went from a 4.5 740 hp to a 1000/780 and the difference is night and day. I for one dont seem to be able to get used to that power,infact its mainly run at 1.6 bar which is lovely on the road. I love the car though gives me a real buzz and hopefully try for some events this year.
 

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Yep agreed, I also have e85 flexfuel and 850 torque and yes its the hang on for your life... I will try it dialled down to 1.8 and 1.6 (currently on 2 bar max).
 

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Yes mines at 2 bar,was thinking of e85,but for once im really happy at where its at. Next step i want is the big alcon brake set up.
Its really hard to imagine 1500 - 2000hp
 
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