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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#391 |
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That may be the case, however, the Nismo/Tomei units are type 1 injectors where as the Sard/PE are type 2.
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#394 |
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If you are still running the OEM manifold I would just keep your .64 exhaust housing and either have codyace weld you a MVS (NOT MVR!) on to the manifold, or you could get a shop to try to weld the v-band flange to the side of your .64 housing and make it like the ATP t25 housing.
the ATP housing flows like a T3 and is .72 so im pretty sure it will be less responsive. |
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#395 |
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help
my setup
power fc hks 740cc injectors tomei 256 cams GT2871R A? R 64 Cp 86.5 pistons eagle r ARP heat s 1.1mm metal heat g tomei expreme manifold 3''cat back ect the first time in the dyno make 297 WHP at 16 psi The tuner said there was not enough gas for more psi i do not think that was right I am not happy with the tune. the injector duty cycle is 50% when driving my car for first time after the tune was make only 10 psi, then I call the tuner and he said my car make 16 psi on the dyno, I would not argue with him and said nothing. I then realized that I only make 16 psi when I was in 4 and 5 gear at 4500rmp. this means that the lol tune the car at boos creep and make 16psi at top end and not at low rpm as all the injector duty cycle is 50% question if I change my tuner you think I can make 20 or 18 PSI? in any gear, not just 4 or 5 at 4500rpm with the stock gt2871r wastegate and my AEM tru boos control, making agustes in the internal wastegate which is the maximum psi on stock internal waste gate Please help ideas to get 320WHP and a good tuner in New Jersey or Pennsylvania |
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#397 | ||||
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![]() You can also use a decent EBC to help control it and while it may, it's still a major PITA to set them up with Internal Gates to work 100% money all the time.
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#398 |
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Hey Cody my car's at the shop now getting all my parts installed and then it will be tuned. My buddy who works there says one of his customers made 389whp with an internal wg setup. What they did is let it spike to 24lbs then settle down to 18 then it becomes stable. I have the hks gt-rs and the maximum boost efficiency is 24lbs so I was thinking about doing the same for now. He's been running that setup for awhile with no problems. Any thoughts?
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#399 | ||
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07011 clifton 15m from new york
I want to use the housing Turbin EWG ATP t25 but I see almost no one who has. if I change my A/R64 to the A/R72 will be better or worse? if a A/R86 is better than a A/R 64, Why? a A/R72 no better than a A/R64, how big is the difference for not doing the ATP housing Quote:
Hey Cody, you've ever weld a 44 mm flame in A/R housing as the ATP? Quote:
you believe the t25 atp ewg housing work on my turbo? |
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#400 | |
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I think of it like: T2(.86) = T3(.63) T2(.xx) = T3(.72) My last dunno with the .72 housing was full boost(18.96) at 4200rpm, and I think if I ran a smaller A/R T3 housing ie .63, full boost would be around 4000 or maybe lower... |
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#401 | |
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th
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what kind of turbo and housing you used and what you like best the old or the new turbo setup with 72 housing ![]() |
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#402 |
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Im having a similar problem as turbolino also, i have gt2871r .64, 740cc, tomei expreme manifold and turbo elbow, stock motor, hallman pro rx mbc, and nistune, running 10 lbs but i dont hit 10lbs in 1st or 2nd, i also am looking to hit 320hp once i get dyno time and another tune.
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#403 | |
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Presently I have the same GT28RS w/ ATP .72 housing/MVS and switched to stock manifold, sard 850cc inj, PBM oval exhaust... Dyno'd the other day 305whp/288trq same tuner, almost same boost...lost 24hp/27trq...had issues with wastegate and i think there was a lot of heat soak. this winter ill be looking into extrude/hone mani and .63 T25 Plus w/ either my MVS mounted on mani or on housing. |
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#406 |
Leaky Injector
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#407 | |||||
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Making big power is totally possible with the internal gate setup...I'll certainly never deny that. The big issue with that is the fact that you need to deal/expect/wish that the spike and drop method works...instead of just going pure runaway and creeping upwards (as either scenario is possible) With that considered, most internal gate/small turbo/overworked turbos do that...but the issue with the GT28XXX and GT-RS type turbos is that they still make power up there, and can handle the speed (well maybe not make a ton of power but aren't just blowing hot air)...while most small turbo setups just run out of steam. My personal car made 400 whp, as did my roomates, as did my other good friends as well...same exact setups. Issues we had were the creep and the internal gates eventually wearing out (we tried all sorts of different ones, pre load vs no preload, different EBC's...there was just a point where it wasn't reliable enough to work (atop of that, it wouldn't vent enough either). Ever since going to EWG though, those issues stopped overnight. The boost slings up to 20 and holds, responds a bit sooner as I can hold the gate shut longer, and doesn't have that creep issue at all. Sentra guys had been doing that to GTiR manifolds (Andris used to weld them up way back when) and they've always been the ticket manifold choice for the 28RS, so I knew it was the way to go with these as well. Quote:
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1. Fitment. Every car will be different depending on how stuff is, and I hate doing stuff without a car to test on 2. Cost. Now atop of getting the welding done you've got to also spend money fabbing up a little elbow to fit, and then also spend more money on the Tial flanges and V band. So instead of 100 dollars you're not looking at 200ish all said and done for the same exact thing. With that all considered I also am not a fan of the ATP housing for that same reason too. 250 for housing, 25 (?) for the little elbow, 25 for the additional V band flange, the cost welding etc etc...So now you're 300+ dollars into that, with a lazier housing. (compared to 100 dollars to have the manifold welded, and then 15 bucks for the flange) ...but then again I've told you and others this forever and everyone somehow still gets confused or worried on it all. Quote:
With any of these cars you're not going to see 20 psi in first gear ever, maybe this side of slicks and full traction. 2nd gear though should see 20 without issue (with traction)...I think it's funny to see people claim their cars spin the tires so easy (which they do) with bald Sumitumo's or some nonsense, and think it's super fast because of that.
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#408 |
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This is the recent MVR job, along with the trimmed OEM heatshield
![]() Came out really slick!
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#410 |
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Can anyone confirm T2 vs T3 exhaust housing a/r are different?
ie T3(.64) = T2(.86) I'm confused by ATP's statement that a T2 housing can "flow like a true T3" It seems mathematically ar is just: ![]() |
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#411 | |
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Quote:
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#412 | |
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Teach me Steve!
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#413 | |
Leaky Injector
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#414 |
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my top feed ID1000 injector dynamics high impedence injectors work fabulously with my Power FC D-Jetro setup. But yes, big flow fatty type MSD top feeds are not going to work so well with a power FC...
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#416 |
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I don't think its top feeds specifically but types of top feed. Possibly due to impedence on the injector being difference? Supras are like that....
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#417 |
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Yea I would say it's a very specific issue, probably more aimed at the older MSD?Rochester style injectors.
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#419 | |
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gt2871, gtx, gtx2867r |
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