Boosted Zed

Plenty as usual at this point as everyone is late and rush in last few days. If your mum was aware of the day she could send in entry forms. Makes me sound old. Oran is popular as close to Sydney.

Yes 50 max and she's a fast boat when it goes. Benm yes squeezing it hard and staying out front takes it's toll.

Short track, cost too much on Sunday for GP and bit harder to supervise.

Yes we have just recently flow tested these adn well not the best and very different in flow figures per runner. As I mentioned earlier in this thread this will be another subject and another thread when we get the stock manifold extrude honed. Carlo got your ears on as on SAU had a stainless one he bought from us and worped and cracked and went back to stock manifold and all good. This was a tuning issue more than anything though and no not from us.

Interesting although I think the cast factory ones are much thicker and I guess why staino ones are lighter? Also I could be wrong but stainless manifolds seem to glow more than stock ones when on the dyno and if I had to touch one I would rather touch the cast factory one especially a coated one. Just an experienced opinion, science may prove different. But then this is side issue flow is the main deal, have you flow tested any or if you have some for GTR and they flow more we will sell them? Scooby up for test YES, YES, YES, OK, OK, OK, I WILL, I WILL, I WILL, LUV TO, LUV TO, LUV TO.

Found this thread about Greddy Plenum and Zoom test and for those who think Greddy is the go seems not for SR20 also. You still get a sticker though. either.http://forums.fastfours.com.au/viewtopic.php?t=92030 Flow bench test showed Greddy flowed a bit less than stock not extrude honed. Then if you check the link at the drags lost out there also it seems. Funny that.

Can't extrude hone stainless as it is too hard. We will have figures and a seperate thread for RB25 and you will be suprised also. Yes dangerous_daveo well made manifolds out of steam pipe is the go especially if high temp HPC coated for GTS-T's and if going high mount turbo as they have more space and can have longer more even runners. For GTR much harder to improve on factory.

Beer Baron stop mixing V and Beer it makes you silly.

Yes Sydneykid I was talking to Geoff from SSS Automotive about them manifolds on his Gibson engine a while back and sound the go. I guess not available though and were they extrude honed or exotic nicely made from the start? I am a little confused though if Gibson? did it as in improved on factory to get more flow then there must be a need, or just more like I am saying it all helps and if can have less restriction and more even flow? It is sometimes hard to not focus on perfect when better or best available is a good option hey? As I take it taht the manifolds youare talking about arenot available? I think we are on the same page though as I said as an example no point in having big throttle bodies on a zed without improving further down the line. But no point in going big turbo's and pumping more boost to get the power without improving flow out of head otherwise just adds heat and stress with out freeing up to get the full potential.

Yep sorry also if I came across hard I did not mean to be but yesterday I actually had two coffees, and played Gran Turismo all day then went home for little bit and then out the door to play a game of comp squash. After getting home around 11pm and was tired but excited and pumped after squash and just had a quick look on this forum and thought I should answer some of these weapon questions. Like why are you avoiding us and this and that and Ahhhahahah yipeee. Told the dog and the wife I would be coming to bed a bit later now. Yes I was a little frustrated with some of the questions and I realize it upsets some mind sets. Any who I refuse to go with the flow and accept Bling options unless they are good which there are many other products that work great and much better than factory or even modified factory items. Kind of like trying to go down to the beach this afternoon and trying to stop the waves coming in, changing some mind sets on some things. That is supposed to be more funny than anything else in case someone out there is pinging at work and reads this the wrong way. Beer Baron don't fall off your seat. Maybe I should invest in some Bling Jap badges and double the price like some workshops I see charge heaps being half reputation and half for the actual work, he he. Some are mesmerized and just pay hey? Yes scoobi do I am up for it what's it though? Oh and for those thinking I am just pushing product well that facts are we pay $440 for the match porting and extrude honing with flow figures plus freight, and more time involved overall than many products we sell, so go figure and yes give SAU discount on them and take out a portion for overheads and make stuff all.

No probs Scooby bring it on not avoiding it I was even asking for a candidate. I did now want to be taken out of context or shoe horned into predictions or promises, I am either not sure of or doubt will happen. As in when you mentioned 10% potential more power as I doubt if it would. For example if a GTR with N1 turbo's say was making 300rwkw and we did this mod it would not make 330rwkw in fact maybe only 5rwkw or more top end although could make more and not just top end but probably mid range too. But then neither will thousands spent on stainless Jap ones that are potentially going to crack sooner or later and radiate heat. The things that you bolt on that make big power is turbo's, cams the rest do but no where near as much and support the turbo's etc. I would not suggest just doing this alone but rather something you would do when doing turbo's and dump pipes. If you bolted things on to a motor and they were to make 10% more power which some items will but if everything did and accumulated a GTR would go from 200rwkw to 500rwkw before too long. Kind of like a particular Aussie car manufacture way back used to say new model uses 20% less fuel and 15% more power than previous model, bla bla bla. They seemed to do this at least every year. At one point I calculated that the 85 model ........ car must be nearing the speed of light and makes it's own fuel if you believed the propaganda..

Cool Roy althoguh yours may have small cracks and you don't know it . I hope they don't but seen this a lot as in no sin or knowlede of cracks then changing turbo's or somethign else and manifold comes off and get a good look and hair line cracks here and there. Not enough to make noise or feel but still cracked. I have seen plenty of nice Jap ones. I have never seen GTR stock exh manifolds crack although a few GTS-T being along log style type can. But then also seen plenty of staino GTS-T ones crack also and more often I think. This comes back to the tune and cooling down and how hard pushed etc.

Buster shiny polished staino is too slippery and not good to coat, steam pipe is the go as if made right then far less likely to crack and can be tidied up with die grinder and optional extrusion honed and HPC treated. Yes dnb I have had lots of flow figures also from Andrew for zed and FTO stuff he does for us, although this is what I am wondering on what machine and how does he do it as figures seem a bit odd. I might call him again today to discuss. No dangerous_deveo I have not had tests done any tests on steam pipe ones for GTR and they could be better although could also be worse. Prob is it is hard to get smooth edges or joins where pipes are welded together and yes can be extrude honed as only way to get inside them to smooth it out. Thing is though in this case the factory design is nice and hard to improve on especially if at the sacrifice of sharp edges bumps from welds inside. Cast is smoth in design just rough surface which is fixed with extrude hone. Our next motor we are doing in my slot car is VQ35 alloy block and going for 1000hp and need to make custom manifolds as they only come non turbo anyway. Will be going external gate which is another can of worms. GTR with well made big single turbo and external gate is probably the go for big power and flow, but this is a different subject or set up. More room then to have nice runners. By the way we have been through the same deal with zeds as had some stainless ones tested adn a bit better than stock but not as good as extrusion honed so we use the factory manifolds and still crack and radiate heat so no good. We use factory manifolds extrude honed and coated and makes over 400rwkw with twin S15 turbo's similar to N1 sepecs with GTR's that don't make anything like that. Now has twin GT28RS so bit bigger. There are other design zed stainless manifolds and the runners go up the side of the head and are more equal lenght with external gates and big turbo's that are BIG money although they look like they couldwork well. I have customers that have these and more than our zed yet don't make quite as much power and much laggier. Ours makes 200rwkw at 3400 and yet still makes over 400rwkw so must be doing something right. Show me another 6 cylinder engine that does this? Way back we had some bling Greddy turbo system with staino manifolds with external gates and VERY coarse welds and dags which we spent hours die grinding and linishing and welding up cracks and putting extra gussets and they still cracked. I bet my house they flowed ordinary also. The intake pipes and hoses were smaller and had sharp edges and would have flowed worse than factory so tossed all that. For a $15k retail turbo kit it was ordinary to be polite. For less than a third of this price and using the stock manifolds we had much better result but no Greddy Sticker. Also Sydneykid made a good point that I have been trying to explain in this and other threads about is better balance of flow from each runner and improves power and motor would like it better over the long run and when pushing it hard which is what it is about. I think this is more critical on intake as effects air fuel ratio.

Yes dnb I know Andrew and have been using him for some zed plenums for a long time prior to discovering James from Abrasive Flow. I have been asking for pics of his flow bench test and power port machine as he is so far away I can't just pop in. Still waiting. Have you been there and seen? It seems to be a sand blast type finish rather than a smooth polished finish like extrude honing. Extrude honing is different method and results although it all helps. With extrude honing it is expensive to tool up as you need to make flanges to mount eh item in a jig to pump the gue which is under high pressure. Anyway I have been through this with other threads and suck or blow virtually the same thing. In fact in most applications exactly. You guys can contemplate and ponder and wonder and get all tied up in technical concepts etc but don't get lost or confused in just debating. It is good to be sceptical just don't get too caught up in it. It is good to get feedback and questions though. UNDERSTAND this simple fact all tests are done the same $36,000 flow bench machine and same method and procedure, so weather suck blow etc and all runners are tested. Also there is not enough room to get equal length runners and if there was it would limit size of turbo or just won't fit bolted to engine, unless going high mount and would probably have tighter bends. By the way what if the stainless ones tested were Gucci Jap brand name items. No we have not done dyno before and after although have sold and fitted a lot, although always with other mods like bigger turbo's or cams etc so can't say for sure. We probably spend more time testing things than most other workshops but it is not viable to test everything and certainly not this as 15 hours to fit these puppies is not something I am willing to pay for. If there are any candidates I would do cheaper but I am not effectively paying approx 15 hours or more plus dyno time to prove it. We did the next best thing and in a way better and that is flow bench test. Flow bench testing is used extensively by serious race teams and engine builders, not back yard bob. One thing for sure we know they are less restriction as proper flow bench test shows although not bolted to head if you did it would also flow more after honing. The engine is like a pump you get air in and out and the more air the more fuel you need, so unless there is a restriction further along the system then increasing the flow of a component which we KNOW it does from flow bench test then we know it will make more power. I would not expect anything like 10% more power by having even 15% more flow as for example standard turbo's will only pump so much although will do it easier, cooler and safer and maybe less boost. Bigger turbo's and ported heads would probably benefit more. You need to look at the whole thing. For example we found by putting bigger throttle bodies on a zed actually made very little difference as twin 50mm seem to cope unless going BIG turbo's. What we found was the restriction was in the head and need porting and larger valves. Bottom line common sense applies if you match port and smooth out and it shows up in more flow on the flow bench test then don't you think it would transpire into more power or do you think less. Please. Note the stainless ones do flow more than the stock ones so at least those who bought and fitted them have not gone backwards as some Gucci stuff can although it looks bling. Flow bench tests shows this and check the results. "Oh OK I will buy them for $2 grand as they come with a SKH Bling Sticker and my mate says you can polish them before you put them on." My mate makes ....rwkw with them so they must work. Think about it some take on face value and pay often BIG money for BLING and get the sticker and don't question it or test it. Then you get figures on something with no bling sticker or brand name and same people say NO can't be. Funny hey? No brand name on them. They are not rough and look well made. Do HKS ones have a logo or stamp although could have come off.

They are exclusive to us we are geared to retail and answer questions and send out and do exchange etc and James from Abrasive flow is best at doing the work, so we keep our hats on at what we are both best at. GTST It is not possible to get all runners the SAME we aim to getting them much closer as you can see. I don't know the brand as nothing on them apparently and I did not see them myself. They were not new ones. If anyone has some stainless ones we will test at no charge and report results.

http://www.abrasiveflow.com/services.htm Not sure if same?

No just honed prices and specs etc are here. http://300zx.com.au/pricelists/pricelist_g..._gtrexhaust.htm

Retail price is $520 a pair. Cheap compared to stainless ones and much better result, and when they are in your car you don't see them anyway even if you are into bling. A fair bit of time and money spent making flanges and jig for the manifolds to go on the machine. Note also this is Extrude Honing not power porting or sand blasting. A thick gritty paste is used on a big Extrude Honing machine and it pumps the gue forward and back for hours to get much smoother. This is done after match porting which also achieves gains although from flow tests results only about 1/3 of the gain. If you are on a budget though and your engine is apart you should at least match port to head and turbo.

If you believe that all Jap made bling items are best DON'T READ BELOW. Flow Bench Test Results RB26 Exhaust manifolds. Test were done on a proper flow bench test at 25 inches of water. All figures are CFM. UAS Extrusion Honed Factory Manifolds..................182.7.........167.4.........179.3.... Factory Manifolds.......155.7.......138.2...........150.1........... Stainles Manifolds......160.4..........138.8.........170.0 To further put in perspective the extrude honed ones are also match ported and different amounts of extrude honing is done in each runner to bring up the most restrictive ones and less on the better flowing ones. Flow bench tests are done to test before and after. This helps even up and balance the motor when in real time, whilst increasing overall flow. Less restriction means less heat and more free power and less stress on the motor. ................... Max Variation...............Average. UAS Extrude Honed.......15.3..................176.46 Stock..........................17.5 ................148.0 Stainless.....................31.2 ................156.4 Plus stainless manifolds are more likely to crack, they do radiate much more heat and can't be HPC coated to well if at all. Can't improve on stainless unless roughly made and have jagged edges which these did not, and can't extrude hone. More prone to cracking. Factory ones unlikely to crack and don't radiate as much heat and can be high temp black coated so will flow a fraction better in reality and perform better as they won't cook the comp cover as much as stainless. As a general rule of thumb every 7c increase in temp you lose 1% of power and require larger intercooler to cope with increase in air temp coming out of compressor. Best part is much cheaper than expensive Jap Bling ones. It is possible that other stainless manfifolds perform better although I don't think they would. We have simlar results which we will release soon for RB25 manifolds, waiting for the extrude honing to be done on a set to get exact figures. We have figures for stock and two stainless types tested. Pic are stock manifolds extrude honed and high temp HPC coated.

Come see or better still have a go. Passengers aloud in designated times, in car transponders, minimum 3 top race drivers for instructions and in car training, events caller, trophies, drrifting and lots of Skylines. The best track day you will probably go to. See our site for more.

Open to anyone in the public that meets the criteria. Own a Skyline and not a major Flop Head and have a drivers licence number. In car transponders that are not and cannot be skyline bias adjusted, or zed by the way. South Circuit.

Good to see stiring up some action with you guys as too many shoulda gunna people out there in internet fairy land. A few blokes stepping up to the plate maybe. Hey 2rismo got your ears on? Beer Baron that's not beer talk you coming and what's your GTR got? As for the RX7 that one is not invited sounds like a candidate though and yes RX7 are very light and handle well. I would give it a run, maybe our track day at Oran 10th July. If we get enough cars and good ones to this event I will get our new media guy Blair out to get some good pics and vids. Maybe HPI might even come or other mags as could be an event hey. Headlines, Zeds smash Skylines at WSID.

OK gang here is your chance to have a night at WSID with other Skyines and race some zeds. Not all zed owners where cardigans so beware. It will be a good night to promote the Nissan thing and if we get enough takers then WSID will accommodate some match racing. We will have our slot car there by they way. For some insite on your competition and what they are bla bla ing about see this. http://aus300zx.neuralmotion.com.au/index....c05bd23m$0Eq$3F?

Probably why she squats and bites and better than most Jappo suspension which have springs TOO hard, so bit of R & D and testing and yes can be better than stock especially circuit.

Probably OK but do a comp test and maybe leak down test to be sure. RB's are notorious for blow by even if in good condition with big boost.