gt2871r thoughts

[Turb0wned]

i hope the .86 is good for 460hp

[tonis56]

Well, im almost ready to order mine. What really has to be done to the hot pipe?? I have a Heavy Throttle pipe and i was gonna get a silicon elbow and do basically the same thing as the stock t25 is set up as. Also planning on buying the kit from Phase2.

[heavy1metal]

lol i remember reading 2 pages or so about this turbo and turbo mapping and crazy stuff...

good info..http://www.240sxforums.com/for...Big28

[codyace]

Ultimatly, I think with an extrude honed manifold and turbine housing, you could create a turbocharger with quicker spool then the gt28rs and still manage to make 370+ whp easily....

I'm not sure about you all, but that would be a KILLER street turbo IMO....

[s13sr20chris]

hey, if the t25 will do 300whp then the gt28rs should do 370. the problem is that stuff like that is not done right. stuff breaks. stuff is highly stressed. keep thinking that way thought because pushing the envelope is how things get done. and if you come up with a way to get disco spool at the 370whp level without large stresses(comparatively speaking) you just sign me up!

[codyace]

No no no...I'm saying that I believe getting the GT2871r turbine extude honed along with the manifold will get you as quicker or quicker spool than the gt28rs...

And I don't see the disco ever makig 370whp without stress...hence the 2871r and my idea

[s13sr20chris]

ok gotcha. be sure to share that info with us when you try it out. i am anxious to see your results.

[codyace]

You'll probably not see any results until...May of next year at latest???

I'm in Iraq right now...we're supposed to be home in February....so in all reality I could have it done and ready in March...but we all know how that goes

The extrude process is tried and true though. A good friend of mine had his GTiR manifold honed for his FWD sr b14, and it literally managed to help his big t28 spool even quicker, and I believe netted him upwards of 15 hp in some areas.....most def improved spool and torque!!

I've included pics of another GTiR manifold that had been extrude honed and modified for external wastegate...I think the pics alone do justice!!







450 bucks for the process, give or take...so if you take that cost vs a aftermarket crackamatic tubular design....it makes it ALL worth it!!!

[s13sr20chris]

nice bro

[civicsi2]

I plan to see what i can get out of my .86 but its taking time. right now i'm at 18 lbs and making 320hp and 305ftlb. the top end is completely stock the bottom end has forged cp pistons and forged rods. full boost around 3900rpm. I've seen tons of post on these try searching. It would be nice to see who has gotten the most out of the .86. I didn't swap the turbo's so what i see is needed is just stainlesslines to replace the stock oil and coolant. and maybe a different hose for the hot pipe. Switching to an external wastegate when i can get a manifold.

[codyace]

FreshAlloy is blocked for me over here in Iraq...could you please post the results??

[Alfa Turbo]

Well it's been about and a half and coming, but finally the car is all put back together and running. It's actually been about a week now, but breaking in the twin disk clutch is taking some time. Actually it's more like braking ME in....jesus this thing is ridiculous.

So this is an update dyno on the prior GT2871 a few weeks ago which put down 374 at 19psi. Since the last dyno we have: new cometic headgasket greddy valve springs titanium retainers 3 angle valve job new oil pump/water pump fuel pump relay new walbro 255hp + 2 more psi..to 20.5-21 (super 94 pump gas)



hope the pic comes out well.

I must say that i'm shocked and thoroughly pleased w/ how the project came together and i've got to say that this car is a friggin missile! I don't know how you others w/ 500+ SR's deal...holy crap

all comments welcome mark

[D1 guy]

Mmmmm....heres mine......Theyre pretty.....Just thought you guys might wanna see some pics.

[codyace]

I appreciate the cut/paste

I assume that was with the .86 hoursing (looking at how the power comes on around 4500ish)

As for the memeber above that only has 320 hp...you will def perform much better with a set up cams and gears...

I'll be sure to post in a year on how my .64 does

[fortwayne240]

I just got my car on the dyno, and figured that I would post my results.

The motor is the Redtop SR20DETGT2871RLE 3" Inlet .64 a.rTomei 740cc InjectorsEnthalpy ECU TuneAEM UEGO Gauge

The best pull was the second on at 19 psi.

HP: 316TQ: 322

I dont know where I put my sheet, otherwiuse I would scan it and post it here. I was slightly disapointed, but I believe that I can tune the fuel with the S-AFC for some better results. I noticed that my AF ration was horribly rich. 10.1 to 10.5 somewhere in there. I fugured that I could raise it a little using the S-AFC, perhaps to around 11.0 AFR, and get some better results.

I was honestly hoping for around 350 or so, but oh well.

I am absolutely sure that the Greddy Intake Manifold and some cams would greatly help, thinking the 256 grind on intake and exhaust. Still daily driven, so I dont want to go with some horrible grind, and loose my daily driving ability.

[deathBooster]

hey fortwayne...

do you feel any lag?? say when u start at a light???

bcause i have the GT2871 not sure abt the a/r size and 550cc,z32 maf,3"down straight, safc, greddy fmic runing 14psi it felt good when i first had it installed.. but now cant really feel the hard push - feels like stock car..

another thing.. is ur downpipe low? my downpime make the entire exhaust like 1.5-2inch away from body and i knocked my turbo off two times because of the street bumps...

[DrifterProdigy85]

Ive got the .64 and .86 housing 2871R. Been using the .64 for 6 months now and have been pretty happy with it. Still using the stock elbow causes some bad boost response and boost drop at high rpm but its still awesome in the way of power. Going from a light, doing a 10mph roll and mashing the gas, you will feel a slight lag period but then boost hits fast and rips to redline, grab 2nd and spin most the way, then get to 3rd and feel some harsh pull again, and it keeps going in 4th and 5th. Im putting the .86 housing on tomorrow and have the weekend to play with it. The difference between the .64 and .86 is about 50-60whp and 400-500rpm in spool time. Both these turbos kick hard around 4krpm so there perfect for the street. I like top end though which is why im trying the .86 now.

[roxorjoo]

hey how is the .86 running? i cant decide on the .64 or the .86. im more towards the .86 right now for the top end.

[DrifterProdigy85]

I like the .86. Too be honest, i used the .64 with the stock turbo elbow and i use the .86 with a Greddy Elbow and they both spool very similar. Id imagine the Greddy Elbow on the .64 would be faster spooling but i like the power. Im more into Drag Racing and Top Speed Runs so the .86 is my choice. I havnt gotten the car fully tuned for it yet and my boost isnt set right but it does pull pretty strong up top.

[fortwayne240]

Well, I guess I do feel some lag, but when I start out at a light, I try to make sure that I rev up the car a little, this seems to solve most of the lag. Quite frankly I am willing to sacrafice the high horsepower for a little quicker spool up, compared to the .86 a/r, especially for light to light street racing.

After I shift from first to second, the power is on right away. I am running 10" wide rear rims with 275 rear tires, and they still spin when the boost really comes on in first gear. Second gear pulls hard from beginning to end.

[DrifterProdigy85]

A 2 step would be awesome with the .86. Build a small amount (5-10psi) of boost from the light and you eliminate the lag for the most part. But thats if your really into drag racing.

fortwayne, Do you have an S14 or S13? Im really curious how well those rims fit. Id love to run a 15x10 Weld Racing wheel on my S13 but i have fear of fender issues.