dazmo

Hey Matt there is a dyno sheet in my build thread from the initial tune with the RPM limited to 7200rpm. I dont have a print out from the the current tune finalized mate. Next time the car is on the dyno i will get a current dyno sheet. V cam would definatley be a welcome addition to my car though and something I would love to run but to be honest due to the expense there are better ways for me to spend my cash as my car has been built with a more track orientated focus suspension and brakes would be a far better investment and would net better gains per dollar spent as far as achieving a better lap time.

Wise choice.

EPIC FAIL there is no such thing as a carbon fibre vinyl and it will definatly not look anything like carbon fibre it will look like a stick on fake carbon fibre wich if you like the ricer look and thats what you want to achieve it will be an absoloute success. If you dont want a genuine carbon bonnet just go without in my opinion, But hey each to their own if we all liked the same thing there wouldn't be enough to go around.

Hey mate once again an awsome result that you and Racepace have achieved. Just to answer you question the garret -5's are simular but they are definatly not the same as the HKS 2530. The HKS turbos have different housings a larger inducer and the wheel trim is slightly different as well. A lot of people refer to the Garrets and claim they are the same turbos but from my experiance and that of a few other people that have used both Garret and HKS the HKS turbos always seem to make a bit more power than the Garrets. I am sure Dirt Garage and Beer Barron will back up my comments on this. I really think that 202 RWKW would be achieved reasonably easily with 14.5psi of boost on a RB28 as my R33GTR RB28-HKS2530 is making 450 AWKW on 21psi without the obvious advantage that the v cam system would give you. The HKS Vcam system comes in step 1, step2 and Step3(PRO). Step 1 I believe is 248-264 step 2 is 248-272 and step3 is 248-280 The whole concept behind the Vcam is to give the advantage and extra top end of the larger cams without sacrificing bottom end power. Lets not all forget that the power that your car currently makes is not on the final tune and there will definatly be more in your set up with the final tune optimised. The figures quoted by HKS will definatly be with the tune and every other aspect of the car optimised to be running to its maximum potential. As you also stated and Ben has said to compare cars on 2 different dynos in different conditions if fairly pointless exersize. I can also say with confidence that nearly all japanese dynos are on the happy side and over inflate power levels. I was in japan with Mark Berry and the Hi Octane boys when they took their R32GTR to japan for the rev speed super battle at tsukuba and their car was putting out 700ps on a japanese dyno wich is between 10-20% more than what the car was actually making on a aussie dyno. Dont get caught up in dyno figures mate as they tell only a fraction of the story the most powerfull car is not always the quickest car the seat of the pants is the best way to judge how good a particular set up is all i can say mate is just enjoy the awsome set up that you have built and dont worry about the figures on a sheet of paper. By the way the quickest time attack GTR's in japan are nearly all running an RB28 with Vcam.

360 modena for the win. We all love GTR's on this forum wich is pretty obvious but any one that would take an r35 over a ferrari 360 is in need of a mental health check in my opinion.

If the HKS demo car you are refering to is the "performance driver" it is indeed a 2.8lt motor.

EBAY may be your friend.

Hey noone can you elaborate a little further on the inherant flow problems of the stock plenum ???. Mate there are far to many GTR's with 400-450 AWKW including my own car and several others I have built all running the stnd plenum and it is definatly not a restriction. I would also recomend having it flow tested as I am sure it would not be to expensive to have the plenum shipped to a major city to have the the flow testing done. Just dont forget that there is a lot more to plenum design than just the size of the thing and i will garantee that the nismo design will definatly be a better design than a modified stnd design regardless of the size of the thing.

No problem mate glad it is all sorted for you.

Hey marko as I stated i didnt think the aussie GRP A cars were not allowed to run dry sumping due to class restrictions I will post the pics of the external oil pump set up the jap spec cars ran tomorrow. I definatly agree the sump on the Jap cars cirtainly doesnt look pretty but I would love to get a peek inside as I would be willing to bet there are a few tricks going on that would be impossible to tell without getting a detailed look inside the sump pan itself. Likewise with the gibson GTR's I really would be surprised if the oiling system would have been as straight forward as a relatively simple sump extension and baffle set up such as the RIPS or most other available extended sumps. Not infering that the RIPS or other available sump extensions are not a good product as all of these designs have proven themselves on big power road cars that see the occasional track day. But I would say that without a question of a doubt that these set ups would definatley not be able to keep an engine alive for a 500klm endurance race such as sandown or 1000klm race such as bathurst. Dont forget that the engines alone were costing GMS around the $100000.00 per engine so I would be willing to place a fairly hefty wager that there is a lot more to the set up on those cars than the simple explanation provided in the post on the UK forum of "a wet sump with a baffle similar to what rips make".

Hi Marko R1 these pics are of the R32 GRP A engine from the taisan/stp car these pics do not show the pump mounted to the block but will give a bit of a better idea of the sort of sump mods that were carried out. These jap spec GRP A engines definatly ran an external pump. I will post up the pics from one of my Nismo books that show the pump mounted tomorrow as i forgot to take the book to work today to scan the pics. From the R33 onwards they ran a full dry sump as these cars were obviously built to JGTC spec and were not subject to as many restrictions as the GRP A spec cars.

HI manage13 the metal disk in the end of the shaft will pop out quite easily the best way is to remove the shaft from the car and just give it a light tap from the hub end with a soft hammer and the disk will pop straight out then you will find there is a circlip that holds the bearings on the shaft so is a fairly staight forward proccess of removing the circlip the bearings will then slide straight off the splined shaft. Assembly is just as simple slide the new bearings on install the new circlip and boot repac with new grease (supplied with the new boot) replace the disk that seals the shaft and reinstall. Might be a good idea to have the shaft checked though as if the cup itself has excessive wear new bearings alone will make no differance if the shaft is clicking while on lock. and you may need to soarce some good condition secon hand shafts.

Absoloutly no need to Oring your block mate this is a very "old school" modification and was a common modifcation before more modern advancements in gasket material and design. There are plenty of RB engines out there running the sort of target boost that you are aiming for with a good gasket and not having any issue. I would consider this mod to be fairly outdated and totally uneccessary. I personally have not used the cometic gaskets before so can not give you an opinion on them . I usually use tomei gaskets in the majority of engines that i build and have never had an issue with them.

Marko I will post some pics of the R32 GRP A engine tomorrow when I have acces to a scanner as I have some nismo books that have some decent pictures in them and also have a few pics that i took while at the nismo omory factory last time I was there these are on my other computer so will post them as well. The jap spec group A GTR's ran a wet sump with external oil pump and the later JGTC cars ran a dry sump. I am not 100% but am pretty sure that the Group A spec cars where unable to run a full dry sump due to class regulations.

Sounds like some pretty impressed customers there and definatly some positive feed back. Are all their wings a generic design or are they model specific as i would be interested in pricing on a static wing for my R33GTR if they are available as i have been looking into options for my track car and have mainly been looking at some of the japanese product available. I would also like to know what the actual weight of the wings are if possible.

Spot on Paul you just beat me to posting any engine builder that knows their stuff will dictate what weight of oil to use depending on bearing clearance that they are running. And that will vary from engine to engine depending on what the engine is going to be used for. Anyone that makes broad staetments like the one two posts up obviously does not really have a clue!!!.

That is all well and good and there is no doubt a huge benifit to be had with active aero in regards to being able to reduce drag increase fuel effiency and top speed on the straights while being able to maintain downforce for cornering. That would go without saying and is a fairly simple concept to understand. And this is the type of active aero that all the litriture above seems to refer to. What I am scepticle on is the split wing design. I personally dont believe that is well developed or proven technoligy. The only example of the split wing technoligy that you seem to have provided is the nissan R381 and if this split wing was so great how come it has not popped up on many other cars ? (possibly it as been banned throughout many catagories). The single element version I can definatly see the merit in but I will still take a bit of convincing on the splt wing design. Maybe LSX-438 can give everyone some feedback if he decides to purchase one as I would like to hear some indipendant feedback.

Fair enough. I am still a sceptic though as I think if it was such an advantage it would have been more widely used in motorsport. Many developments have been tried and tested in motorsport and most of them that have any real merrit are generaly widely adopted across many motorsport catagories at least untill they are banned. Why is it that this technoligy does not seem to have popped up in F1 or FAI gt1/Lemans style cars ? as these would probably be 2 of the catagories with the most advanced aero tech. It may also be the sceptic in me but it is extremely easy for test results to manipulated to show a desired result especially when there is no real technical data other than a lap time no actual drag coeffcient numbers or measured downforce numbers etc if this was truly such an innovation it surely would have to have been tested and designed in a wind tunnel and therefore there would be some more technical info available.

Never seen a design like that used on any form of race car or in any form of motorsport so it could be a bit of a gimmick that could just be the sceptic in me but i think that there would be better ways of getting and advantage with your 8K.

Yea mate i would agree that you guys have got a good base to start with and I know how much trev has spent on the car and like you said it is a rare find to get a GTR that is everything that the previous owner says it is.. My car is putting out around 450 AWKW (600 AWHP). I have a build thread in the projects section if you want to check out the specs but it is probably a bit overdew for an update will look forward to saying hi face to face when i next get to the track.

Thanks for the complements on Mattys Car if you ever need any work done just shoot me a pm or get my no from Trevor. You should not have to much drama getting into the 56 sec zone with a bit more power and a decent wheel alingnment. Is your GTR Trevors old car GTRGOD correct ?. If so you have a good base to start with. As far as the set up in my car to run a 55 sec lap I think the car will do it as is (have upgraded to a better set of brakes now) just need to dial in the suspension and wheel alignment stick on a fresh set of tyres (the ones that i had on the car for its 1st shakedown where pretty well cactus before I even did a lap and one had just started to delaminate when the balancer broke so they would not have lasted the day anyway) and some time behind the wheel. As that lap time was set straight off the trailer with only 8 laps in the car and the brakes where going off after the first 3-4 laps so I was having to brake earlier and earlier each lap. I am extremely confident the car is capable of it the biggest handicap that the car has is the driver so whether I am up to it is another story hence the need for a lot more time behind the wheel. As you said though next year should be a good one. Next time I am at the track and see you I will come and say hi.

You will not have a problem makeing that sort of power with a standard crank and block. Especially with the amount of extra meat in the bore with a 26.5mm bore size LOL. As long as your engine is well built and you have a good tune you should not have a drama. You would be surprised just how good the stnd nissan stuff is.

Before you go spending up on the toyos I would send a pm to giant as he used a set of toyos on his r35 at this years super lap and according to him the car was around 1-2 seconds a lap slower on the toyos than it was on the dunlops. And he also stated that the toyos seemed to squirm around a lot due to a much softer side wall wich seems pretty consistant with my experiance with R888's on older model GTRs as they seem to have a side wall that is much to soft for the weight of a GTR as opposed to lets say an EVO on wich the R888's seem to work quite well.

No worries mate. I have not recieved a pm though you may ahve to try and send it through again.

I will make sure I have one ready to go for you mate. Will be keen to come out to the track again and lend a bit of a hand if needed mate. Maybe next year you should bring up the RED R track car up this way and we can throw a few corners in and both get out there for a bit of fun . Will chat to you soon mate.