GT2871 USERS. SR motor

[sr20det_510]

oh and alumi lightweight crank,wp,and alt pulleys?

[sr20det_510]

thanks again u guys are the best unlike other forums where people are d$%ks

[Seraphim38]

lightweight pulleys are a complete waste of money, especially on the crank. If you are going to swap the crank pulley go to an ATI damper, but if you aren't going to install solid lifters in the head to rev it high you don't need it.

HKS cams are great but expensive. BC cams have had bad quality control in the past but seem to be better lately, I don't know. Best bang for the buck in my book are Tomei's from my personal experience. They are half the cost of HKS and shouldn't be overlooked. There are many JWT fanboys here, and I have no objective data to enable me to argue for or against. Nobody locally to me runs the JWT cams.

The Megan manifold will probably crack unless reinforced. Make sure you use the exhaust hanger to the trans mount: without it your manifold will crack quickly. And yes, I know because I had a cracked megan manifold in my closet until I gave it away.

The 255lph fuel pump will easily work to 400rwhp and beyond.

Injector Dynamics top feed injectors are the best to work with, by far. Fuel injectors are really important. Some designs are hard to tune with or to get to idle well. I like ID1000s because you won't have any duty cycle problems at 350whp, you will have plenty of room to grow and getting them to idle will be easy. If you are going with a ROM tune though, find out what injectors they recommend and stick with it. The Tomei's are expensive for what they are. The Tomei FPR is fine. EMS is the most expensive option and if you are staying in the 350hp range, you may not have to go that big.

[sr20det_510]

AWESOME thanks for the input brother as far as everything else i listed u guys approve?

[KoukiMonsta]

if your going to run a metal headgasket i would deck the surfaces..

[sr20det_510]

Well ima do the apexi 1.5 that's what everyone been saying

[mattsil80wis]

Originally Posted by 801nismo104

stock tb will be fine for only 350hp

im on stock tb making 403hp on the "codyace" setup

[sr20det_510]

so deck or no deck?

[JN1AS4]

Deck....to insure that all surfaces are truly flat. Before clamping the head down to the block.

[zombiewolf513]

Deck the head, deck the block, get the oil pump machined flat with the face of the block. No copper spray or rtv on the headgasket.

Tomei TYPE-L fpr

1000cc injectors are WAY to much. 550-750 is were you wanna be.

Stock intake manifold, stock tb

[sr20det_510]

Originally Posted by zombiewolf513

I said the 1.5 because if you get a bunch of material removed you're compression ratio wouldn't be absurdly high, and if they didn't remove a lot you'd be sitting closer to a stock compression ratio and be safer from knock if you run into shitty gas.

Oh, and get some nice springs for those cams, not cheap garbage.

i tought you guys said dont deck?

[sr20det_510]

Originally Posted by BlackZenkiS14

Seems like a shit ton of machine work and excess expenditures that would otherwise be unnecessary for a daily?

Why not just run a stock block and head with cams and bolt ons and a JWT ECU? You'll still make like 350whp easy, and not have all the bullshit that comes along with a race prepped built engine. And you'll have a daily reliable tune that you don't have to mess with all the time, or take somewhere every year or so to get tuned?

ahhhhh confusion

[zombiewolf513]

Originally Posted by sr20det_510

i tought you guys said dont deck?

Deck it and run a 1.5mm head gasket.

Earlier i was saying (this is my personal opinion, others may dispute), "if the machine shop cuts only a little bit off (.001"-.003" [off of the head AND block combined] when they deck, you can use a 1.1mm headgasket"

BUT... If you are ordering parts before you get the machining done, just get the 1.5mm head gasket. I say this because if they cut a lot off you're safe from too high of a CR, if they only cut a little off you're safer from knock.

On another note, you should get the machine shop to gap your rings for you before the hone so it doesnt get marred. Youll probably need to rent some sort of torque plate as well unless your machine shop does a lot of SR20s

[Seraphim38]

550s will be near out of duty cycle at 350whp. It has been discussed here many times. 1000s on the other hand, on my car, max datalogged value was at 50% duty cycle. However, it is worth noting that duty cycle increases under load at lower rpms, so I max my 1000cs on the street at low rpm and as boost comes on they back down on duty cycle. My 1000s at 350hp ran smooth as silk and now that I am dishing out more hp I am glad I bought the right injectors once and don't have to upgrade now.

I say deck the head and do the right head gasket based on target compression ratio. I currently have running a 0.8mm HG, since I have low compression Greddy pistons

[zombiewolf513]

Thats good to know. I take my setup to get the haltech initially tuned today, 9:1 .02" over pistons, eagle rods, all arp studs, all acl race bearings, 750s, 1.5mm head gasket, .004" total decked, 2871r, jwt s3 cams, doc bottom mount, hmic, map setup, stock intake and tb, stock springs, full exhaust. With the tune being done by national speed in wilmington im hoping for 400 whp, some friends say 410-420 but im not so sure on that. Opinions? Estimates? Guesses? My only concern is the turbos internal gate, i ported it, but im still concerned it wont offer the performance i need.

Member sr20det510, notice he has low CR pistons with his .8 HG. IMO do not do that with your 9:1 pistons, unless you have a nice EMS and a REALLY good tuner. Your CR would be through the roof.

[sr20det_510]

i have 9:1 86.5mm pistons with eagle rods

[sr20det_510]

yah i dont want high cp so i can run atleast decent boost

[Fatboy Garage]

Originally Posted by zombiewolf513

Deck the head, deck the block, get the oil pump machined flat with the face of the block. No copper spray or rtv on the headgasket.

Tomei TYPE-L fpr

1000cc injectors are WAY to much. 550-750 is were you wanna be.

Stock intake manifold, stock tb

What is your reasoning behind no copper spray on the headgasket?

On all the motors we have built we have never had an issue with the head gasket that has had copper sprayed onto it. Just wanted to see your opinion.

[zombiewolf513]

I called Apexi and that was what they told me...
No spray if the block and head have been decked. I figure it is sort of like when you take two panels of flat glass and twist them together, they create a tight seal. No need for a sealant between the two. Metal with a smooth surface finish acts in a similar fashion, and the apexi head gasket does appear to have some sort of very thin coating (maybe electro-plated?) on the two outer (the word escapse me right now but...) "sandwich plates."

I, personally, would be inclined to use copper spray if the surface finish was course or scratched somewhere though.

[sr20det_510]

because im afraid if i get my head and block deck they might shave too much

[sr20det_510]

thats it im getting a rb26dett lol

[EsChassisLove]

Block is sleeved, both head and block decked and my Apexi HG failed without any copper seal.

Fuck Apexi gaskets lol.

I went cosworth and put a bunch of spray on it, almost 3000 miles of abuse later it's perfect.

[zombiewolf513]

Originally Posted by EsChassisLove

Block is sleeved, both head and block decked and my Apexi HG failed without any copper seal.

Thats a first

[EsChassisLove]

Originally Posted by zombiewolf513

Thats a first

Nah it's not. Apexis fail with sleeved blocks. Darton failed to mention that until after wards.

[sr20det_510]

Like i said

[Seraphim38]

news to me: I have a sleeved block with an Apexi HG. I will have to ask my builder and ask Mazworx, who did my bottom end about this, but so far I have no evidence of an HG problem and my motor puts down some good power. Anyway, I can't think of why someone would ever want to sleeve a block for 350whp: it is completely unnecessary.

[EsChassisLove]

Who said my main goal was 350?

I'm slowly making my way to 600.

I'm not like most idiots that shoot for massive power right of the bat then come to realize they can't control the power for shit because they have driven anything near that powerful.

I sold the 2871 for a reason lol

[jamg]

what's the "codyace" set up?

[zombiewolf513]

Originally Posted by EsChassisLove

Nah it's not. Apexis fail with sleeved blocks. Darton failed to mention that until after wards.

If thats true, I wonder why that is

Originally Posted by sr20det_510

Like i said

What are you worried about? Just copy someone elses setup

[zombiewolf513]

Originally Posted by jamg

what's the "codyace" set up?

JWT s3 cams
Jwt ecu
2871r extrude honed and swaned
Stock manifold extrude honed and swaned

Uhhh theres something else i think but i forget, its something like that