2.7 TD vs 2.7 TDi

[makeitfit]

Right oh chaps n gals, if one was to tune the 2.7 oil burner to the max with the min budget, which is the best option?:augie
For example. TDi , mod the turbo, tweek the ECU, intercooler mods, upgrade the turbo to T28, stick some LPG up it and do a decent exhaust.
Sounded good to me but with all the electrickery on board is it a problem waiting to trip me up?:augie
OR take a std. 2.7 and put a big turbo on it, mod the fuel pump(not sure how),proper intercooler, LPG and a good exhaust. WITHOUT all the electrickery

Discuss

 

[Timbo_1975]

The latter. TD will give almost all the TDi will give, mechanically adjusted, more with some choice mods.

In this order for a solid 130hp+ and 30% more torque:

decent FMIC
disable EGR (where fitted)
half decent 2.5" downpipe
Boost gauge and 12-13psi via mods to the wastegate, and open up the inj pump to suit + touch more advance.

If you were to go futher will get you ~15hp more:

T28 with at least a 0.72 cold side, or better a GT2871R, 15psi max. EGT gauge.
custom outlet in place of the cast item, ported manifold
3" downpipe.
larger inj nozzles and futher mods to the pump.
3,0 clutch.

To go any further needs better head bolts, and skimming the pistons to get the CR down abit.

 

[makeitfit]

"custom outlet in place of the cast item, ported manifold"
Tell me more

 

[Timbo_1975]

The stock turbo outlet is rather crap and small.

You'll need one of these cut and shut, or your own made:

http://cgi.ebay.co.uk/NISSAN-200SX-S14-SR20DET-2-75-EXHAUST-TURBO-ELBOW-BN_W0QQitemZ120515524842

And clean up the exhaust manifold of casting marks, and match the ports to head / turbo etc.

 

[makeitfit]

Yep, doing the outlet with the guys you recomended
I haven't thought about the exhaust manifold though:augie
Is there much for the hassle? Power gain I mean

 

[Timbo_1975]

the elbow helps with breathing at higher revs quite alot, as does the downpipe, and they both help the turbo spool much lower down (less backpressure)

The ported manifold is less noticable.

 

[makeitfit]

I'll pop up the scrappy again tomorrow then and start a moddin' me bends:thumb2

 

[makeitfit]

FMIC? Is there a size that's too big? I've read somewhere else on here about getting turbo lag from too much cold air charge:augie or is it more a case of monitoring the charge temp?

 

[Timbo_1975]

Yes. You can go too big! Given that the turbo has 'fill' all the pipework and 'cooler before the engine sees it, and that a T25 isnt the worlds biggest blower, you dont want to fit a 'cooler off a 500hp truck!

 

[makeitfit]

Ta for that, I've got the improved turbo to put on soon I hope:sly
I got this one :-
A NEW IMPRESSIVE GARRETT ORIGINAL PART. ITS A 60trim 48a/r RACE UPGRADE SET.WHEEL SIZE IS inducer 46.48mm. x 60.01mm,a T28 large 60trim COMP WHEEL, PROFESSIONALLY MACHINED WITH CORRECT TOLLERENCES TO ENSURE THE SET RUNS TO ITS FULL CAPABILITIES,UNDERTAKEN BY A USA TURBO UPGRADER. ITS A LOW LAG,HIGH BOOST UNIT,GIVING AN INCREASE IN BHP AND A HIGHER CFM FLOW PASSAGE.IT DOES'NT INCREASE THE HEAT THROUGH THE COMPRESSOR,BECAUSE OF ITS LARGER A/R. SO IF YOUR WANTING TO INCREASE YOUR BHP,FAST SPOOLING AND EXTRA PERFORMANCE.
Well that's what it said on the tin
So will get the downpipe sorted with your rec. asap.
I'll try it with the std IC first and have a spy for an alternative later.:sly

 

[Timbo_1975]

Run that at the stock 10-12psi and stock intercooler to start with I'd suggest. It's capable of more CFM than the stock blower, so you dont need so much boost pressure.

As long as you can throw it enough fuel to make use of all the air now!

 

[makeitfit]

I hope so too, but the Tunit guys promised me their bit of kit will do the job
Fingers crossed the pump will cooperate:thumbs