Advice On Turbo 6

[MrBean]

Hello Everyone,

Ok, I finally relocated to Melbourne from South Africa, 1 month ago. Last time I played with turbo engines was back in 1999, having build a 351 Nascar Winston Cup-based 351 Windsor engine with twin Turbonetics turbos, making around 750HP and 1000nm torque at the flywheel.

Used Haltech F9, dual injectors through Victor Junior manifold, Eagle H-Beam rods, JE forged pistons, billet crank. All this into Ford Sierra XR6 body - the 4-door of your 2-door XR4i if I am correct.

Well, I am 39 now, and want to get into my hobby again - and in Oz it seems easy with all aftermarket goodies available.

I need some pointers though:

Where to find a relatively new UTE XR6 body, with wheels, suspension, basically everything except motor and box. I will mount Recaros, in-dash car-computer, based on Commell LV-677 motherboard, and dual-core Intel cpu.

Engine wise:

Possible bulletproof shortblock, with wide H-beam rods, something close to 8.3-8.8:1 CR, with proper dished Arias forged pistons. Decent valvesprings to handle around 0.48 (at .050" ) lift with around 10-14 psi boost behind them.

Twin turbos, small enough to eliminate lag completely, feeding into a roughly 4-6L plenum chamber to act as a decent air reservoir for the engine (to avoid lag/surging) - would luv to keep stock long-runner manifold though, to keep excellent bottom-end torque characteristics of this engine.

Custom stainless 409 branches to feed the turbos - and eliminate killer backpressure on exhaust valvetrain.

Some decent turbo-grind camshafts - I would ultimately like around 300-350rwkw, nothing killer, just good enough to keep me smiling. Motor must be ultimately reliable, that''s why I don't want to boost it to death.

I know with the yanks, generally their taxi cabs/police vehicles have stronger cranks/webbing around the bearings - is it the same with Aussie 6's? I hope so, this way I can rather get one of these "Seasoned"engine blocks with around 50-80k on the clock, and have it machined to accept new pistons, blueprint setup etc.

Some feedback would be appreciated, I would worry about management later, probably aftermarket to enable dual fuel injectors, activate 2nd set under certain amount of boost pressure - that way I won't sacrifice excellent atomization characteristics of stockies, thus having best of both worlds - if it is practical to fit 2nd set into std intake runners.

Forgive the long post, I am really looking for some experienced feedback - it would be appreciated.

I am in Melbourne, and will have a chat to Simon at Nizpro as well, but generally priorities are now to obtain decent UTE shell as requested, and maybe engine which can be used as a donor for shortblock rebuild.

Anyone?

Edited 07/05/06 11:47 AM by MrBean

[ZAP]

Mr Bean,

Welcome to Oz and our site.

You seem to know your way around a motor, so I will give you my view on your project.

You would be better to get a complete car as they are not difficult or expensive to buy, but getting missing parts from a wreck or rolling body could cost more than you plan.

These Turbo's do not really have any lag, so I thinkg a Twin setup would make a simple power plan a complicated one, but if you like fiddling then go for it. The 4lt 6 is such a torquie beast they just pull from idle.

You will also be able to get 300rwkw with just an edit and injectors, so a new plenum is not needed.

I am sure you will get a similar view fromt he more modded members here.

Again welcome and try the search button as there is a lot of good info here.

[MrBean]

Hello Zap,

Thanx for the welcome, and feedback

I have played a little, but was much more into 300kph+ streetracing than drags - all legal races, controlled by cops back home, something called top-end races - you have like 1-6-2km to do your thing in....exhilirating stuff.

But - the reason I want a bullet bottom end, is if you want to up boost pressure, you can dial it without worrying about detonation/weak main-caps etc...

So, even though I want 300-350rwkw, if needed, I want to have ability and surety I can up to around 450 without fear of breaking anything in the engine. We'll worry about tranny and diff later...hehe...

Just want something wild on occasion, and sometimes, a need for a change of clean undies....

I will need to look around for a 2nd hand UTE in a good condition, with a late-model engine with more consistent cylinder walls.

But, your feedback is valued, thanx again.

[F6 RAPID]

As Zap said mate, you really don't need much or certainly need to go overboard with these things.

Put a tough bottom end in it and you really don't need to change from standard cams or turbo. There are a number of engines around now running around the 400rwkw all day, everyday. Trust me, that is plenty for the street! and you will start breaking stuff around this level, although with a ute, that is negated somewhat.

[fish_351]

Talk to Nizpro - they will be able to get you to that kind of power pretty easy with minimum fuss.

Nizpro Website

Probably no need to re-make the wheel - Nizpro have been in it up to their necks since the first XR6T rolled off the line. They've been into performance turbo stuff for years - since the VL days I think.

I'm not paid or reimbursed for my comments - I just think they are bloody good at what they do.

HTH?

[MrBean]

Thanx for the feedback Guys.

@ F6 Rapid: Most likely Ford has produced a decent Turbo profile on the cam, so I might stick with that - but, at around 14-17psi boost I will need much better springs.

I need to speak with Simon and see if I can buy "parts" of his kit only, eg intake plenum, manifold, and the machining and sonic testing - I will do my own cleanup of components/block etc, and assembly and torqueing of bolts.

Does there exsist any adjustable cam sprockets for proper cam degreeing? Or will the std sprockets allow this already? That way I can use my clockguage/degreewheel to dial in Cams to blueprint specs.

For me, a lot of fun/satisfaction comes from assembling myself - I luv it.

@ fish 351: Thanx for the input, I have registered at Nizpro's site, so I can ask him a few questions directly. Awaiting registration email....

Anyone else?

[fish_351]

No probs.

I'm sure Nizpro can sell you just the bits you're after, be it springs or plenum etc.

Get it from the horse's mouth though.

There's heaps of good info on their forums, Simon quite often gets on there and separates facts from "forum fiction", on different topics.

Cheers

[MrBean]

Thanx Mate Good advice....

[turbotrana]

Your questions are a bit advanced for this forum. It seems you have it pretty sussed anyway all on your own, not just for 350kw but for a potential 700kw engine.

If you ask what colour you should paint your engine I think you might get a good response

[MrBean]

rofl @ turbotrana

But, to be honest, I always like to over-engineer the bottom end, especially rods and mainbearing caps - that way you are quite safe when boosting.....

That type of horses would be a waste, and I doubt a straigt 6 will survive the torsionals on the crank with those kinds of loads acting on it....I think it will snap. Under those loads it winds up and down like a corksrew.....

V8's are much better for that application, but certainly the best is flat engines.

But, nice to poke in here and chat with the guys, even if to discuss color-schemes - quite a few knowledgeable guys here....