Decision for new turbo to gain performance, GTX3071R?

[fliprayzin240sx]

Originally Posted by brndck

I'd suggest 740 injectors, the gtx3071 is a good choice. You also will want a larger throttle body and possibly aftermarket intake manifold.

I'd probably even suggest some SARD 850. I've seen 740s max out around 450-460 range. Better to have a bit more just in case.

[Scott@FontanaNissan]

Originally Posted by fliprayzin240sx

I'd probably even suggest some SARD 850. I've seen 740s max out around 450-460 range. Better to have a bit more just in case.

^^^ I Agree with Him!

Personally I'd Recommend

JWT Fuel Rail
ID1000cc injectors
Tomei FPR
DocRace Twin Scroll T3 Manifold
GTX3071R with .82 A/R divided Housing.
Full 3" Exhausts.
Turbosmart Comp40 Wastegate.

as far as turbo goes, partly why it's so laggy its because of the really big camshafts that you have. I would change your camshafts out for some JWT Camshafts that'll give you better mid range HP and more TQ down low. the GTX3071R will be a good turbo for 450+hp. I recently Tuned a completely stock block and head RB25 using California 91 octane fuel and made 422whp at 17psi peak (around 4K rpm) and boost fell off to 14psi by 7700 RPM. made peak hp at 7300RPM. so with only 0.1L difference in size and a more efficient cylinder head that you have on your car you should have no problem hitting your 450whp goal with a GTX3071R all parts which we can supply for you

-Juan

[codyace]

Originally Posted by Scott@FontanaNissan

^^^ I Agree with Him!

Personally I'd Recommend

JWT Fuel Rail
ID1000cc injectors
Tomei FPR
DocRace Twin Scroll T3 Manifold
GTX3071R with .82 A/R divided Housing.
Full 3" Exhausts.
Turbosmart Comp40 Wastegate.

as far as turbo goes, partly why it's so laggy its because of the really big camshafts that you have. I would change your camshafts out for some JWT Camshafts that'll give you better mid range HP and more TQ down low. the GTX3071R will be a good turbo for 450+hp. I recently Tuned a completely stock block and head RB25 using California 91 octane fuel and made 422whp at 17psi peak (around 4K rpm) and boost fell off to 14psi by 7700 RPM. made peak hp at 7300RPM. so with only 0.1L difference in size and a more efficient cylinder head that you have on your car you should have no problem hitting your 450whp goal with a GTX3071R all parts which we can supply for you

-Juan

Couldn't have said it better myself

[Q.Smooth127]

Originally Posted by Scott@FontanaNissan

^^^ I Agree with Him!

Personally I'd Recommend

JWT Fuel Rail
ID1000cc injectors
Tomei FPR
DocRace Twin Scroll T3 Manifold
GTX3071R with .82 A/R divided Housing.
Full 3" Exhausts.
Turbosmart Comp40 Wastegate.

as far as turbo goes, partly why it's so laggy its because of the really big camshafts that you have. I would change your camshafts out for some JWT Camshafts that'll give you better mid range HP and more TQ down low. the GTX3071R will be a good turbo for 450+hp. I recently Tuned a completely stock block and head RB25 using California 91 octane fuel and made 422whp at 17psi peak (around 4K rpm) and boost fell off to 14psi by 7700 RPM. made peak hp at 7300RPM. so with only 0.1L difference in size and a more efficient cylinder head that you have on your car you should have no problem hitting your 450whp goal with a GTX3071R all parts which we can supply for you

-Juan

that is a bread and butter top mount setup for any KA/SR with a fairly decent budget (not over kill with bling bling full race stuff even though they do look more nice and baller on your "mod" sheet when you wanna show off haha)
if you aint goin for the 350whp bottom mount gt2871r setup, this one is the way to go for 400+ no problem.
Plus you already using a dual fuel pump setup, so your fuel delivery will be good once you get those larger injectors. Always best to get some slightly bigger but not like crazy crazy big like trying to use 1600cc injectors to just get 400hp ... but enough so ya dont have to max duty cycle the damn stuff. Thus its always nicer to have em a lil larger cause you never know if you wanna try get "just a lil more" power during the tune session cause everyone likes power . Thats why i always hate seein dudes buy 550cc injectors and say they wanna hit like 400whp wit those. Just buy the bigger 740s or 850s if the chance deems itself, cause you can always de-tune/de-power the setup to fit your needs. Better to have a lil extra then push it and then ... shit not enough lol. I mean im not some ultra turbo+fuel setup guru, but we all here to just chime in right

and +1 on JWT cams. i wanna sell my dam BC3s for some nice JWT ones haha. But man those cams are like almost 600 buckaroos n id prolly need to sell all my BC springs n shit n grab JWT spring kit so i dont mix BC stuff with JWT stuff
i need to convert guys on the islands to start usin JWTs, they all just love their tomei poncams lol

[redline racer510]

2.5 inch exhaust?