R32 GTR, aftermarket cams worth it?

[Kaido]

Hey,

Well going to be doing the major 100,000km service on my GTR soon, and was wondering is it worth putting in some cams while im at it?

atm the car is mild mod (currently making 370hp), car is running GT-SS and is a still a tap laggy for my liking, was thinking of doing some HKS Step 1 cams with cam gears, but wondering if it is worth the money, aim for the car is around reliable*ish 400hp as i will be doing track work with it again once i get some free time.

FYI engine is from an R33 GTR
mods: HKS GT-SS, trust piping kit (turbo side), Hks piping kit (intake side), 600cc injectors, pfc djetro, full exhaust, plus few other bits

Cheers

[Alt_F4]

Dial in some adjustable gears should see a worthwhile improvement on stock cams.
I made solid power gains everywhere and reduced spool time 3-400rpm

My pick would be Poncams (260/260) if you do decide to get cams instead.

Oh yeah no cat and more boost always helps things :)

[RRob]

I'd definately be putting some drop in's in there. RB26's respond well to cams, but they are not going to fix any lag issues you have. Dial them in and if you're really keen swing them whilst on the dyno too.

[SimonR32]

Go a single

[OzGTR]

+1 for Poncam 260/260s. I did mine and saw a good improvement of torque across the entire rev range. Also the standard turbos seem to not run out of puff so much at the top end too.

[Yakky Bear]

yes. Cams are worth it.

[thrtytwo]

If for nothing else, they're worth it for the sound on idle haha

[Kaido]

thanks! general idea on SAU is cams are pointless for my power level, which i don't think is 100% correct

[RRob]

I'd say cams in a basic SR or RB25 are pointless but not a 26.

[zeroyon]

well just to be different, I don't see much point in cams at your power level. My stock cams are happy to make 560rwhp without dropping off badly. Sure I might get more tourqe from some cams but I can get that too by adding more boost for zero cost.

I'd have to agree with Simon put a nice gt30 single on it, make 400rwhp and have bugger all lag. Also for track work, really easy to work on when your break it :)

Cam gears do seem to yeild good results but I've never had any experince with them myself on an RB.
At the end of the day though your not going to lose by putting cams in but I would spend money elsewhere.

[Kaido]

well just to be different, I don't see much point in cams at your power level. My stock cams are happy to make 560rwhp without dropping off badly. Sure I might get more tourqe from some cams but I can get that too by adding more boost for zero cost.

I'd have to agree with Simon put a nice gt30 single on it, make 400rwhp and have bugger all lag. Also for track work, really easy to work on when your break it :)

Cam gears do seem to yeild good results but I've never had any experince with them myself on an RB.
At the end of the day though your not going to lose by putting cams in but I would spend money elsewhere.

Single is out of the question (lap times are my goal, not power figures), car makes fairly good power for what it cost me to get to this stage and i am more concerned about getting the handling right before i go for more power. Twins are laggy for me because all the previous cars i have track where super responsive but they where all down on power compare to the gtr

[DenZel]

If for nothing else, they're worth it for the sound on idle haha

Can you hear any difference with drop in cams at idle though?

[markdett]

Can you hear any difference with drop in cams at idle though?

Hks 272 drop ins sound pretty lumpy at idle. Tomei 260's sound good too. You will be suprised.

[SimonR32]

Single is out of the question (lap times are my goal, not power figures), car makes fairly good power for what it cost me to get to this stage and i am more concerned about getting the handling right before i go for more power. Twins are laggy for me because all the previous cars i have track where super responsive but they where all down on power compare to the gtr

We are talking about a small single, a GT3076R, HKS 3037 or T67 or something like that... They will be more responsive and make the same power

[Kaido]

We are talking about a small single, a GT3076R, HKS 3037 or T67 or something like that... They will be more responsive and make the same power

yes i understand that but then you have the following cost; turbo, manifold, gate, braided lines, dump pipe and i/c + intake piping kit. the GT-SS are near brand new done i would say less than 1,500km on them. Although i could recoup some of the cost from selling my current gear, i rather invest the money in setting up the suspension.

also my tune isn't the best atm which i think doesn't help the lag

[c.rusli]

Single is out of the question (lap times are my goal, not power figures), car makes fairly good power for what it cost me to get to this stage and i am more concerned about getting the handling right before i go for more power. Twins are laggy for me because all the previous cars i have track where super responsive but they where all down on power compare to the gtr

Sell GTR get evo
DO IT

[BIGS]

Hpi mag did a comparison some years back where they got a gtr and did back to back dyno runs with low mounts and cams. After replacing the cams with stock ones they found there was maybe 2hp difference if that. Reccomendation was stock rpm just stick with stock camshafts and use adjustable cam gears.

[ChrisGTR]

Hpi mag did a comparison some years back where they got a gtr and did back to back dyno runs with low mounts and cams. After replacing the cams with stock ones they found there was maybe 2hp difference if that. Reccomendation was stock rpm just stick with stock camshafts and use adjustable cam gears.

Do you remember what cams they used?

[BIGS]

Not to sure, thinking they were pon cams. If I get time I'll try dig the article up.

[_oz]

We are talking about a small single, a GT3076R, HKS 3037 or T67 or something like that... They will be more responsive and make the same power

correction, more power :D

[monga]

I've had 260's then upgraded to 272's, made a huge difference in top end power. I'd suggest them.

[TheChad]

surely if you're pulling it apart and you think at some point you'd want to go there anyway, a pair of drop ins would be a smart decision.

you've already said:
-you're pulling it down
-you're getting it re tuned

those two pieces are the most expensive part of getting cams... if you're doing it anyway why not just splash out the couple of hundred and come out swinging?

[ChrisGTR]

I've had 260's then upgraded to 272's, made a huge difference in top end power. I'd suggest them.

So there was a noticeable difference between the tomei poncams and the hks step 1's? I would be interested to hear your opinion on how they both compared (low down power, idle quality, top end, etc..)

[markdett]

So there was a noticeable difference between the tomei poncams and the hks step 1's? I would be interested to hear your opinion on how they both compared (low down power, idle quality, top end, etc..)
Would be interested too! Where the step1 HKS's or step 2's?

[monga]

I had the HKS or Poncams, can't remember as it was a few years ago now 264 and 8.7mm or there abouts. I upgraded to the Jun 272's with 10.8mm lift stage 2 kit, include springs, retainers, port and polish and some other shit. Did not change the turbochargers or any other parts except for the head and used the same headgasket kit on replacement. Made about 50hp (500~hp - 550hp @ 24PSI) more and shitloads more torque and power uptop and through the range. Idle became much more aggressive for those that have heard my 32R. Turbo's on the car at first were the HKS GT2530'S, then the GT2860 -5'S. The Garret turbo's are shitloads better. As a street combo it's fantastic, I've had some great runs over the years with more higher power combo's.

[Alt_F4]

272s are a bit big for GTSS IMO... not sure if the turbos will be able to make use of them before they fall over (e85 might change this though).
They clearly make good gains on -5 sized turbos.