Jump to content
The mkiv Supra Owners Club

New and looking at going NA-T


Guest Boostjunkie
 Share

Recommended Posts

Guest Boostjunkie

Hi all

Felt abit silly signing up as I don't have a supra lol, however I'll be selling my car soon and looking to get one after ages of waiting to be a proud owner. Now Ideally I want a 6 speed tt but the extra price they ask for seems to high for me so I was thinking of going 5 speed NA-T as I like external gates with screamers and the kick of big single turbos as I feel a tt auto will be too smooth and not feel as fast

 

Now I'm a mechanic so fitting etc is no problem, I'll be looking at the 400hp range (must be as quick as my old car lol). Now I've done a fair bit of research but there's just a few more things I would like cleared up before going this route over tt auto.

 

- Would the whifbitz kit running 0.5 bar be reliable and solid on a totally stock NA apart from me updating the clutch.

- are the loss of oil squirters really going to effect reliability in the long run

- could I just get away with a TT head gasket and arp's and upping the boost more without changing pistons?

- finally what's the best ECU to go for rather than piggy back as from what I read the na gets a big timing advance at 4.5k rpm and likely to cause DET

 

Overall I would be looking for a strong bullet proof reliable 400hp maybe later on push more (with r154), if I did get tt pistons/HG/ARP's could I run 500hp reliable for example as I understand GE has same crank and rods as the GTE. Lastly would a 400hp na-t be able to compete against a bpu tt in a straight line.

 

Thanks

Link to comment
Share on other sites

Guest Boostjunkie

Ok the main thing I'm worried about is oil squirters, I'm getting mixed views some say doesn't matter and others seem to think its a bad idea turbo'ing without oil squirters, just looking for confirmation on actual na-t owners and there experience

Link to comment
Share on other sites

You will find a few people who run big power 2JZ's running NA bottom ends to eradicate the oil squirters among other bonuses(cost etc).

 

I think I saw Jamie P post saying that there was a discussion as to whether the oil squirters unbalanced the piston at high power/high revs.

Link to comment
Share on other sites

Guest Boostjunkie

I know big turbo ones don't run them however I would imagine there forged pistons and probly only run 1/4 miles at a time where as I'll be doing a lot of road use and wouldn't want excessive temps going on

 

I really can't wait to have a supra, pretty certain of going NA-T and starting a new project :)

Edited by Boostjunkie (see edit history)
Link to comment
Share on other sites

No worries at all mate! They're a good strong lump, with potential to take decent power:)

 

Read through Rich.2211's NA-T thread. That's someone who's taken the time to do it right, without spending a huge amount and he recently ran a 12.9 1/4 mile @116mph -whilst only running 7.5 PSI of boost!

Link to comment
Share on other sites

I believe the stock internals are good for circa 700-800bhp, so you shouldn't need forged rods/pistons etc:)

 

You need to expand on that comment, and explain new bearings would be recommended for over 500 and also a lower compression. Many variables to consider, though many standard recommendations have been beaten or ignored without fatal results.

Link to comment
Share on other sites

Guest Boostjunkie

I understand above 400 I will need bigger injectors, bigger fuel pump and sufficient intercooler and lower the compression, I was thinking of going the route of TT headgasket and arp's to lower and aim for a bullet proof 400+ Ideally (don't want to strain to many internals as I would want to keep this for along time)

Link to comment
Share on other sites

I understand above 400 I will need bigger injectors, bigger fuel pump and sufficient intercooler and lower the compression, I was thinking of going the route of TT headgasket and arp's to lower and aim for a bullet proof 400+ Ideally (don't want to strain to many internals as I would want to keep this for along time)

 

I'm running 400bhp with stock injectors, stock fuel rail, stock fuel pump, stock HG. In a nut shell I just bolted a turbo on turned the boost up to 6.5psi. The only extra was fitting a Custom Front facing inlet manifold (FFIM).

 

If your on face book click on the link below in my signature, its a page called team na-t ran by a few members on here :)

Link to comment
Share on other sites

I understand above 400 I will need bigger injectors, bigger fuel pump and sufficient intercooler and lower the compression, I was thinking of going the route of TT headgasket and arp's to lower and aim for a bullet proof 400+ Ideally (don't want to strain to many internals as I would want to keep this for along time)

 

I'm running 400bhp with stock injectors, stock fuel rail, stock fuel pump, stock HG. In a nut shell I just bolted a turbo on turned the boost up to 6.5psi. The only extra was fitting a Custom Front facing inlet manifold (FFIM).

 

If your on face book click on the link below in my signature, its a page called team na-t ran by a few members on here :)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.