5.4 L engine on the way, what exhaust should I fit?

[Sydr]

My new engine will have 5.4 litres of top hatted goodness, Forged crank, forged high compression pistons, special conrods, stage 3 heads, good cams, reworked inlet trumpets with lots of nice-to-haves thrown in, including a new ecu program from Mark Adams who has also supplied Bosh injectors, which he recommends. It should make good power and plenty of torques.

The car currently still has a pretty standard exhaust system. Although my service provider comments that the standard headers are quite good, it seems to me a shame to throttle the new engine with a standard exhaust and I'm interested to know whether anyone has put aftermarket extractors on their Rover V8s, and what the results have been. I will really welcome your comments and insight.

So, are there stainless headers available, and has anyone tried them or does anyone have any recommendations?

As I'm sure you all know, the current exhaust system takes a wondrous detour from the driver's side of the car, across the car at right angles, to join at the passenger side. Has anyone succeeded in fitting a dual system from the headers to the tailpipes?

I'm also wondering whether anyone has fitted free flow catalytic converters and a 3" system, either single or double?

[banarcus]

I've got Genies on my Disco 2. I can say that although I have a stock 4L, the extractors made a noticeble difference in torque and fuel economy. With mods, the extractors would give even better results as the stock manifold would be your bottleneck.

[Sydr]

I've got Genies on my Disco 2. I can say that although I have a stock 4L, the extractors made a noticeble difference in torque and fuel economy. With mods, the extractors would give even better results as the stock manifold would be your bottleneck.

Thanks for the heads up, in order to follow up I called Genie in Qld and spoke to Brad who told me that they only make them for the 4L engine, suggested to me that they wouldn't fit my engine ????? and that I'd need to get them custom made.

back to square one. :confused:

[Pedro_The_Swift]

if you are running LR heads,,
they almost have to fit--:confused:

size of the port maybe?

[Scouse]

Thanks for the heads up, in order to follow up I called Genie in Qld and spoke to Brad who told me that they only make them for the 4L engine, suggested to me that they wouldn't fit my engine ????? and that I'd need to get them custom made.

back to square one. :confused:So they said they'd fit a 4.0 P38 or just a 4.0 Disco II ?

I haven't been able to find any 'off the shelf' extractors for the P38 anywhere.

[andrew e]

I haven't been able to find any 'off the shelf' extractors for the P38 anywhere.

I have, they are stainless steel aswell.



I cant remember their name, but their logo is a green and gold (mabe silver)oval. Luckily the company who supplies and fits them, also includes heat shields, to stop other parts in the engine bay melting.

andy

[Hoges]

IIRC Isn't there an after market ceramic coating available now to reduce radiated heat from exhaust headers?

[Hoges]

My new engine will have 5.4 litres of top hatted goodness, Forged crank, forged high compression pistons, special conrods, stage 3 heads, good cams, reworked inlet trumpets with lots of nice-to-haves thrown in, including a new ecu program from Mark Adams who has also supplied Bosh injectors, which he recommends. It should make good power and plenty of torques.

The car currently still has a pretty standard exhaust system. Although my service provider comments that the standard headers are quite good, it seems to me a shame to throttle the new engine with a standard exhaust and I'm interested to know whether anyone has put aftermarket extractors on their Rover V8s, and what the results have been. I will really welcome your comments and insight.

So, are there stainless headers available, and has anyone tried them or does anyone have any recommendations?

As I'm sure you all know, the current exhaust system takes a wondrous detour from the driver's side of the car, across the car at right angles, to join at the passenger side. Has anyone succeeded in fitting a dual system from the headers to the tailpipes?

I'm also wondering whether anyone has fitted free flow catalytic converters and a 3" system, either single or double?

Damn! that sounds very nice:D Is this an import or local confabulation and are you retaining the standard transmission?

[Sydr]

Damn! that sounds very nice:D Is this an import or local confabulation and are you retaining the standard transmission?

Engine is being built by an UK company, see
V8Developments Ltd. (http://www.v8developments.co.uk)

I've briefed them and Mark Adams (ecu program) on my requirements - p38 RR, towing car, want big torque not huge revs, and also on my driving style - hit the 'sport' button as soon as it fires up but tend to use the gear selector - dislike the accelerator kick down. So I've no plan to change the transmission which has never given any hiccups and which I'm told is very strong and should cope admirably with the extra hp.

The engine is promised for completion today, and I've ordered some ancillary parts that seem sensible to replace while I'm doing a heart transplant - all rubber hoses to engine, tranny, and heater, other rubber bits like engine mounts, tranny oil cooler, engine oil cooler, heater matrix, radiator, new fan and viscuous coupling - whatever you would think of as sensible to replace.

I'll also replace the blend motors (carked a long while ago), have just had the dropped roof lining beautifully repaired by a v good local trimmer who is v reasonable, will replace the rusted sun roof frame when I find a replacement (seperate post) and will fit new airbags, shocks, eas by pass system. Brake discs have just been done.

It was "do it properly" when the engine developed a new liner, or "toss it and buy another Rangie". To my mind, after doing the numbers and in the light of the fact that I love my p38 which I've had since new, no contest. I've had the massive depreciation once, and that is quite enough. Others may buy a Toyota Pious as their gesture to recycling, I'd rather repair than replace.

I'm interested to find out whether a hi comp engine with all the nice bits will use rather less juice than the 21 - 22L per 100 that I see when I call up the numbers on the display. Since I only call them up when I wish to cheer myself up on long trips, that is academic. :D

[Scouse]

I have, they are stainless steel aswell.



I cant remember their name, but their logo is a green and gold (mabe silver)oval. Luckily the company who supplies and fits them, also includes heat shields, to stop other parts in the engine bay melting.

andyGreat :).

Do you know if they're a local manufacturer or from overseas?

[DT-P38]

Don't waste your time looking for an exhaust, just ask them to ship that engine to me in Melbourne and I will take care of it for you!

Kidding of course, hope to see-hear a video or sound file of it running when you get it in and running.

P.s. I think Andy may have been referring to standard exhaust manifold?!? From what I've read it's only after that point you really need changes for improvement(s).

[Sydr]

Don't waste your time looking for an exhaust, just ask them to ship that engine to me in Melbourne and I will take care of it for you!

Kidding of course, hope to see-hear a video or sound file of it running when you get it in and running.

P.s. I think Andy may have been referring to standard exhaust manifold?!? From what I've read it's only after that point you really need changes for improvement(s).

Your point is quite right, thank you. Both my service provider (Ayers Automotive, who has looked after the car very well for around 10 years) and the engine builder (V 8 Developments) have told me that the standard RR header is actually very good.

I will listen to them and take the advice from V8 Developments to just open out the headers to match the enlarged ports on the cylinder heads and to fit a good quality free flow zorst system with hi flow cats.

Has anyone fitted a true dual exhaust system front to back?

BTW, Melbourne has the very best collector and vintage car collections, you guys have enough good stuff already, so thank you for the kind offer but I shall keep the engine in Sydney. I will, however, make frequent trips to Melbourne for the excellent things you do there, like the Phillip Island Historic Race meetings.

[wild_willy]

You could speak to Hans at HP about building you a set.
Headers-Custom (http://www.hi-flow.com/HP010cEH.html)

Custom designed and built headers plus Jet Hot ceramic coatings

[Pedro_The_Swift]

You could speak to Hans at HP about building you a set.
Headers-Custom (http://www.hi-flow.com/HP010cEH.html)

Custom designed and built headers plus Jet Hot ceramic coatings

look at the TR4 pic,,
THATS what we need to suit a RV8,,
4-2-1 with looong secondaries.

those into a twin system---:wub: