25+ psi on GT2871R??

[kentuckyslider]

I want to go with 110 race fuel and 25-27psi on my setup for the drag track and go back to 18 psi for pump gas. I talked to a tech from JWT and he said it would be fine. I have a NGK wideband and a safc-2 for fine tuning I just need a boost controler or external gate to get my boost up. any suggestions?? I currently have a cheap manual controler and my wastegate is maxed at 21psi on 93 octane. I am always in the 11.5 afr on my wideband at WOT so I know my 72lbs injectors have plenty left. I just don't know anything about electronic boost control or how to get my 2871 to boost at 25 lbs?

I want to make a low 11 second pass this fall when it cools off. If I drop some weight and do cams and intake with the race gas I could see a 10.99!Any help would be greatly appreciated.

[kentuckyslider]

anyone??? codyace, driftprodigy, idahotuner, vanquish2, etc??????

[ryan15]

I honestly think the only thing stopping you is knock, besides that 25psi should be a go, I see gt3x guys do 30psi all day long, I dont see why it would be an issue with a slightly smaller turbo.

.02 cents

Ryan

[Emperor_Tha]

how about a lunch control, water/meth injection and a standalone that can do antilag shiftGet u closer to 10sec

[hugogos22]

I have greddy e01 and it allows me to set how hard i want my boost to come in it allows me to set boost by rpm which is great for out the hole, great job of controling boost spikes and has a over boost warning, sd card which allows you to record your runs . It has a aux port to connect what ever the hell you want . Oh i have your turbo with s4 cams .

[kentuckyslider]

how about a lunch control, water/meth injection and a standalone that can do antilag shiftGet u closer to 10sec

I am getting 1.56-1.7 60' without launch control and I have had two people tell me that it causes ignitor chips to fail on the SR. I have considered the import intell, perfect launch.

I am going with a 14psi wastgate actuator and a AEM true boost controler and going for 26 psi on 110 race fuel. The water methanol can be dangerous and I will feel much safer with race fuel and 2 settings on my safc-2. One for 20 psi on 93 and one for 26 psi on 110. I still haven't decided on cams though? Jwt says 26psi and 110 octane will work well together.

[DrifterProdigy85]

24psi is about the top of the effeciecy range of the turbo. Most ive boosted with the turbo is 26-27psi and that was with wastegate line coming off. Your probably not gonna gain anything over 24psi.

[idahotuner]

i ran 24 psi on 92 ocatane for a few secs it was one of my dyno runs and it wasnt intentional. it was spiking lol cause i hadnt finished setting up my avc-r for 20 psi.

[Koshin]

I know that Vanquish2 runs 25psi + on his car and w/ a 2871 .86....That car is wicked fast..He'll chime in I'm sure

[kentuckyslider]

I'm either going 25 psi with my 2871 or I'm selling my 2871 setup and going gt3076 top mount with 27-30psi and cp116. I am also cutting weight and possibly going with launch control. I want a 10 sec. pass when I run the 1/4 this fall when it gets cool. Will 25 psi require 110 octane if I'm running at 11.5-12.0 afr now at 20psi? I am also considering tomei 270's and solid lifters.

[DrifterProdigy85]

110 should be alright. You really should put it on a dyno to see if the extra boost is worth it.

[kentuckyslider]

I am scheduled for the dyno October 4th. I will be running 24-26 psi with 110. It will also be my 1st run with the 4.36 R&P. I think the 4.36 will hurt me a little on the dyno compared to my numbers with the J30 3.91. I have lost 2-3mph in the 1/8th with the new R&P but it runs faster times. If I don't like what I see I'm going top mount and GT3076R.

[SlowS13Silvia]

i was also wondering if this is the case with the disco potato (gt2860rs) w/ .86ar exhaust housing. I've made it give me 20psi easy with my crappy boost controller, but im wondering if i switch to an electronic one would i be able to create more.

I have mods to back up the psi, forged 9-1 pistons, hks cams, 550cc injectors, and of course ill be running race gas on the track only...

just wondering....

[vanquish2]

I'm either going 25 psi with my 2871 or I'm selling my 2871 setup and going gt3076 top mount with 27-30psi and cp116. I am also cutting weight and possibly going with launch control. I want a 10 sec. pass when I run the 1/4 this fall when it gets cool. Will 25 psi require 110 octane if I'm running at 11.5-12.0 afr now at 20psi? I am also considering tomei 270's and solid lifters.

I wouldn't go with anything bigger then 264's (non-bc) cams with the turbo. If you sell that turbo (contact me if so) and go with a maybe the latest 2871r (460-475hp and faster spool) or a 3076 (very restrictive on the turbine side on a t2 bottom mount) then go with the 272's or similar. The other guy is correct. 24psi is about all the typical -1 2871r is good for but it will continue to gain a little torque over that psi. It depends on what part number you have for that turbo. There are 4 variations for the turbo ranging from 400-475. Find out which turbo you have first. Solid lifters are not required so save the money if you would like. Just make sure you bleed your hyd lifters well.

[Kalypso]

anyone??? codyace, driftprodigy, idahotuner, vanquish2, etc??????

thats a list of the "made men"

[DrifterProdigy85]

Haha, never been called a made man before.

Also if you need a list of the 2871R's

48 Trim .64 or .86 A/R T2 Housing (400hp)52 Trim .64 or .86 A/R T2 Housing (450hp)56 Trim .64 or .86 A/R T2 Housing (475hp)56 Trim .63 or .82 A/R T3 Housing (475hp)

[kentuckyslider]

I have the 48 trim .64 housing. Any links to the 56 trim specs and maps would be appreciated. I know I will be sticking with the .64 housing, I like the low rpm spool and my car has out run 2 .86 housings with similar setups. One even had cams. JWT says my tune maxes out at 450-475 whp with the 72lbs injectors and the cobra maf. I would love to see those numbers with a 2871 on a T2 bottom mount.

[DrifterProdigy85]

http://www.turbobygarrett.com/...1.htm

http://www.turbobygarrett.com/...2.htm

I used to have the 56 Trim .86 A/R. Trap speeds were generally around 122-124mph. Some have gotten 128mph but its unreal if you ask me.

[vanquish2]

I have the 48 trim .64 housing. Any links to the 56 trim specs and maps would be appreciated. I know I will be sticking with the .64 housing, I like the low rpm spool and my car has out run 2 .86 housings with similar setups. One even had cams. JWT says my tune maxes out at 450-475 whp with the 72lbs injectors and the cobra maf. I would love to see those numbers with a 2871 on a T2 bottom mount.

It doesn't sound like your spools are that far off from the .86....I think you said 3800-4000??? My hits hard at about 4200.....I guess I figured there would be more of a difference.

[idahotuner]

mine hit hard at 4200 witha .64 52 trim and a megan racing manifold plusa greddy intake manifold.

and 9 boost leaks lol

[kentuckyslider]

idahotuner, what cams are you running? the only major diff. in our setup is I have a 48 trim and you have a 52.

[idahotuner]

BC 264 cams.

[DrifterProdigy85]

If you really have the 48 trim. It really chokes at high RPM. Anything over 7krpm is just about out of the effeciency range. Hop on a dyno cause im curious what you make with different boost levels. You should definitly out spool any 52 Trim or 56 Trim 2871R.

[DrifterProdigy85]

Also if you want to try and run 25psi, you wont even be on the compressor map as far as effeciency. I couldnt see it helping any if its a true 48 Trim.

[idahotuner]

yes my car power drops after 7 grand my dyno chart shows it drop like crazy cause that was when i would let off the gas. but if you were to run a little psi and doing the pull in 4th you might be worht it to take it to 8 grand.

[mistamacadamian]

buy my 60-1 .58 exhaust side. it'll get ya where you need to be.

[vanquish2]

Also if you want to try and run 25psi, you wont even be on the compressor map as far as effeciency. I couldnt see it helping any if its a true 48 Trim.

Just double checked the map on garretts website...26psi is technically exactly where is jumps off the map. 25psi is still on the map but it is true is leaves the map at about 75% of the rpm potential of an SR.

I do know from 22 to 25psi on a 48trim is a HUGE difference in feel. Only about a 20whp on the dyno though.

[kentuckyslider]

I got the tomie 260 procams with 12mm of lift and the BC springs. I just hope I will see the same gains as you with the extra boost. I dynoed 345whp at 20psi with stock cams. Surely with the cams, and 4-5 more psi i will be getting close to 400whp? With the 4.36 R&P it might dyno 385 but it will be a faster car. With the topspeed intake on back order and everyone wanting an arm and a leg for the Greddy, the intake will have to wait. If I get close to 400whp without the intake I will keep the stock for TQ.

[DrifterProdigy85]

Personally i like the JUN Style manifolds there selling from Thailand on ebay right now. My friends got one on his Supra and its amazing.

[kentuckyslider]

link?