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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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09-23-2008, 02:19 PM | #481 | |
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Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
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09-23-2008, 05:37 PM | #484 |
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so just put a gt2871r (.64) tubular manifold, 740cc nismo injectors, enthalpy tune, 300zx fuel filter, etc etc on my car boosted about 16psi two days later diptick shoots out turn off car clean it all up do an oil change since most of oil is missing anyways and car now smokes like crazy when i get into boost, no its not left over oil on manifol cleaned it all off white smoke comes out exhaust smells like burnt oil.... i assume my piston rings are done?
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09-23-2008, 05:46 PM | #485 | |
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09-23-2008, 06:07 PM | #486 | |
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09-23-2008, 09:11 PM | #487 |
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That is exactly my thoughts. It was ran 3 times on the high boost setting all with similar numbers. My guess is that with the stock fpr and a tomei fuel pump, it is just blasting a ton of fuel through. Is it possible that they arn't seating and fuel is being forced through a little bit when they are closed? That is my guess. It is horrid on gas but no flames exact from the bee r .This was on a "dyno drag day" recently and everyone else had normal readings unless it was his three runs where the dyno metered incorrectly.
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09-25-2008, 11:16 AM | #488 |
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It's hard to say, but this is my view on them
If you have a street car, and don't want to mess with any valvetrain components, and want to rev to 7850 safely, AND have a T2 flange (t25, t28, gt28r, gt28rs, gt2871r .64, etc) the Jim Wolf S3 cam is the way to go. Install them as oem, and instant awesomeness out of the box. Tons of low end smile inducing grunt. Response is immediate If you have a t3 flanged car (gt30 series, t3/t4 based setups), than the Jim Wolf S4 is the way to go. It provides great midrange, and big boy top end to compliment the 30r style turbos. To me, it's just better matched for the turbo's powerband. Again, stock valvetrain safe, 7850 limit. Now, if you want to play big boy style, and want to upgrade springs so you can sustain high R's longer, and want to take advantage of bigger lift cams, than the Jim Wolf C1 is the way to go. This cam is like a voodoo stick, as it provides great low end response for the t2 guys, abut also has some awesome topend for the t3 guys. This makes it happy for everyone. Again, aside from needing springs, it installs like stock. These cams are noted for generating even better torque 'plateaus' than the s3 and s4 cams...which is awesome. The only downfall of the C1, is that you will probably need a 1000/1200 idle set. They are a race cam. Now even with all of that said, it's known from the FWD world, that S4's will still work great with T2 based setups (some even argue they are the better 'overall' turbo cam), as when used in conjunction with a bigger plenum it provides some sick top end. However, IMO for ra street based car, the s3+2871r .64 is hard to beat. Fast on the roadcourse, low 11 capable, and 30 mpg cruising....can't beat that, unless you're buying a Vette haha.
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09-25-2008, 11:50 AM | #490 |
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I can't wait for winter
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Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
09-25-2008, 03:03 PM | #491 | |
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130 / 30 / 120 / 115 |
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09-25-2008, 05:08 PM | #492 |
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so s3's and a 2871r for the street? why is 7850 the upper rev limit for stock springs? i know the cams will stop making power closely after that. are the stock springs known to float after that?
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09-25-2008, 08:58 PM | #493 |
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i will be going with the 2871r and was wondering if it would be better to go external wastegate or stay internal? so far internal has been working fine for me on my t25.
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09-25-2008, 10:00 PM | #495 |
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My internal wastegate on my 2871r creeps to 19 psi at high rpm. Its not too big of a deal as long as you keep an eye on it and tune for it.
Ideally with cams and once you get into the higher hp numbers with the turbo, you probably are going to be better off with a external wastegate. |
09-26-2008, 02:00 PM | #496 |
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I got internal with some HKS Step 1 264 cams and it holds steady at 17psi.... I can do more, but eh.... too much mid range for street....
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09-26-2008, 02:37 PM | #499 |
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I was internal gated on 272's at 22psi like a rock. Never overboosted.
Im internally gated on 264's at 16psi. I have a vac and exhaust leak so it fluctuates but still reliable. External is a waste. There is a reason Garrett made these internal. Next Holset HX in yo face. External gate dumped out my hood. Protect your women. |
09-26-2008, 05:53 PM | #501 |
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haha! I can't wait.... Hey guys, does your oil catch fill up sometimes? I have it rigged Crank case - VC - Catch Can - Air Breather.....
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09-26-2008, 11:10 PM | #503 |
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^^ my 2871r does the same thing! it seems kinda wierd how some setups creep and others dont. i have my controller set at 1.1bar and it creeps to 1.3ish near redline. dont really like it haha. I would rather hit 1.2bar off the bat and hold it.
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09-26-2008, 11:13 PM | #504 |
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I fixed that by reinstalling my external gate setup
ebay manifold ebay 38mm tial custom dump dube holy fuck its loud.
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09-27-2008, 02:20 AM | #505 |
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codyace what kinda numbers can you expect with the 2871 with this setup?
tomei 256 11.5 cams tomei 1.1mm Hg tomei 740 cc tomei reytec ecu tomei fpr with FMic ,boost cotroller, fuel pump. |
09-27-2008, 03:05 AM | #506 |
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my setup is almost done also
2871 .86ar tial 38mm external w/screamer top feed 880cc power fc 3" dp into 3.4" exhaust BC stage 3 cams/springs kit splitfire coilpack jim wolf cam gears *minor shit that kinda helps 1 piece steel driveshaft light crank pulley flywheel im trying to break 400 whp. will it be possible? |
09-27-2008, 04:08 AM | #507 |
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for some reason i am able to boost up to 26/27.5psi on my 2871R, i had the boost controller lines hooked up backwards once and it boosted 26 and 27 once when i mashed the gas in third.. it actually tore up my clutch, caused it to slip 2 times before i noticed the lines were on backwards, then after that whenever i boost anywhere above 10 psi it started slipping and now its almost done for..
my boost guage read 27.5 psi and my greddy boost controller read 25.5 psi i always thought they would only boost up to 20psi?? or somethign aroudn that range am I wrong?
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09-27-2008, 07:47 AM | #508 |
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well boyz im off to the dyno today! Yay!
Rebuilt Redtop Block: CP Pistsons 9:1 86.5mm Eagle Rods ACL Race Bearings ARP Head, Main, and Rod Studs Head: Tomei 256/256 PonCams Tomei RAS Tomei Expreme Mani Cosworth 1.1mm HG Greddy Intake Manifold Tomei 740cc Injectors Aeromotive FPR GT2871r .64a/r (internallly gated) BC Valves (STD), Springs, Ti Retainers TUning with Power FC L-Jetro AVC-R for Boost Control! Wish me Luck!
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09-27-2008, 09:07 AM | #509 |
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Here's what I got in the works:
-Redtop with stock bottom end -B/C stage 1 264/264 cams -B/C springs w/titanium retainers -Tomei 1.2mm Headgasket -ARP headstuds -GT2871R with .64 a/r (internally gated) -Tomei Expreme exhaust mani -Greddy Intake mani -Tomei 740cc injectors -z32 MAF -Walboro 255lb/hr -Nismo Adjustable FPR -Greddy Oil Pan -Apexi Loudmouth exhaust (no longer available from what I hear, awesome system tho) -Trust Downpipe with testpipe -Megan Racing turbo elbow (my only cut corner although codeyance will tell you using B/C is cutting corners ) -Enthalpy tuned ECU I plan on running 16-18 psi and am really only looking for 350whp with around 300+ ft/lbs of torque. My only worry is I sent my ECU off to enjuku racing who sent it to enthalpy who tuned it and sent it back to enjuku who sent it to me with NO PAPERWORK so now I have to make sure everythings ok. I figured they'd at least send me something such as recommended fuel pressure or boost levels. I do, however, took the cover off the ECU and theres obviously a big chip in there. Maybe I'm just paranoid but if anyone else has an enthalpy tune maybe they can chime in if they got ne paperwork back when they sent off their ECU. Also if anyone knows exactly what they go off of for the tune I'd love to know b/c I was told just to send a sheet with every single mod I have. Anyways I digress I'm looking for conservative numbers on a safe tune for street/track use mainly drift/autocross events and possibly some open track days. I'll def be posting dyno #'s when everythings back in the car and running smooth. I forgot to mention my stock SR dynoed 210whp/198ft/lbs on the stock block running 7lbs with nothing but a front mount and exhaust (tight motor). |
09-27-2008, 10:15 AM | #510 | |||||
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