Acheiving 400hp from an SR

[diamondsink]

I'v decided to bite the bullet and go for some decent power from my S14a.

I'm aiming for around 400hp or very high 300s.

Heres my current spec

SR20DET, std internals
Std T28 @1.3 bar
HKS 555cc
Stg 2a HDev Chip

few other supporting mods
Oil Cooler
FMIC
Alu Rad
Full 3" exhaust system (Std exhaust manifold)

I'm looking at the GT2871r 0.64 or 0.86, will these create the power?
Do i need cams?
I would be worried about a fitting a GT30 as i want the power with as least lag as possible. I rather stretch a GT28 than jump up to the bigger turbo.
Also would i need 740s?

I'm open to suggestion and options.

I cant afford any forged internals but ill put a metal HG in if advisable?

Also what mapping options is there custom hdev , nistune (fc tunning) ?

cheers Rich

[Chriscooke]

I would of thought that 740's and cams would be needed to make 400bhp on the 2871r. Nistune would be a good bet but jez could do a custom map on the board you have (if your stage 1/2 etc)

[Bristol Blue]

I thought you already were running that sort of power?

2871 should do it.

The debate is whether you can get the .64 housing to make it to that magic 400. Some reckon it will fall a few horses short.

From what I've hear the spool up is good and power delivery smooth.

[sideways14a]

I am shooting for as close to 400 as i can with a .64, going to be running cams and some head work with a bottom end build for toughness, you will want a mhg as well.
550s aint going to be doing the business at that level, go for 740s
Go nistune for the ecu and map...

[igralec]

a stage 3a setup with a remap for 740cc injectors and maybe some aftermarket cams should do it on a GT2871R 0.64, could probably go for a 0.86 and get a bit more, power and lag

[scottie200sx]

dont know about cams with the gt28 but mine has produced 490 with a gt30 on standard cams and only a metal head gasket.

im using a link g4 standalone ecu live mapped

[eager]

its pushing a 2871 very hard. I been there. Now running a gt3071. with 264 cams and d-jetro setup with forged build.

[diamondsink]

I thought you already were running that sort of power?

Nah just over the 300 mark. Low ratio diff helps.

I assume the 0.86 housing will be less laggy than the gt30? what sort of cams should i run, i have no idea about cams or where to get them?

What do the nistune do that the hdev setup cant? I dont wnat to spend cash on a nistune setup unless a cant get it from the current HDev board witha custom map.

[DavS1RST]

Cam's are not needed.

I'd go for low comp pistons, steel head gasket, bigger turbo, Apexi PFC, big exhaust, big cooler and an uprated G.box

[eager]

nistune fitted gives you lots more flexibility in future and prob not much more than custom map that is tied to your mods.

brian crower cams with uprated springs is about £300 from america delivered. 264 spec.

[Chriscooke]

nistune fitted gives you lots more flexibility in future and prob not much more for custom map that is tied to your mods.

brian crower cams with uprated springs is about £300 from america delivered. 264 spec.

Arn't those the ones that cut out the vvt?

[eager]

Cam's are not needed.

I'd go for low comp pistons, steel head gasket, bigger turbo, Apexi PFC, big exhaust, big cooler and an uprated G.box

Id say cams will def be needed to get 400 from a 2871

[eager]

Arn't those the ones that cut out the vvt?

Nop ya can get vvt version, i have them, vvt still working away

[ToddS14A]

i was told 2871 0.86, with 260 poncams and MHG will reach 400 when i was doing my build

[bobbitt]

cams and adj exhaust cam timing wheel can be used to get earlier boost.. some people have said full boost at up to 500rpm before over standard

[Chriscooke]

Nop ya can get vvt version, i have them, vvt still working away

Interesting

[diamondsink]

I'm going to run the std box (i have spares lol) untill i can get a rb25 box in there. The internal will stay std too until i can afford it or it goes bang. I'm pretty sure i will fit a metal HG but again have no idea on thickness/CompRatios?

[Chriscooke]

Check out polo's thread mate. He was running decent power on standard internals up until this season.

[sideways14a]

Arn't those the ones that cut out the vvt?

The ones i have are VVT and stock lifters

I would definitely go cams and smaller turbo if your wanting up to 400hp

[Scottie]

555's should just make 400 if you fit a good FPR (think mine is TOmei), if you want to save the cost of 740's.