Borla Exhaust? recommend it?

[Jupiter Rover]

hey, im just wondering what you gys think about a Borla exhaust system for a DII ?

ive heard there good, and one of the best. But does anyone know how they work on rovers. specifically the Discovery II '03.


and also do the safari snorkels increase Horse power. ?

Thanks . Pete.

[Think]

If you're trying to get more horsepower, you probably chose the wrong vehicle to do it to. After a $500 exhaust and $300 snorkle, you won't feel like you've gotten what you've paid for...

[Jupiter Rover]

i dont care about the price. lol. i just wanted to know about the actual equipment and how well it works. and so on and so forth.

[TN-LR3]

after the cats get a 3.00 pipe and 40 series flowmaster, it will sound like it's got 300hp

[TN-LR3]

after the cats get a 3.00 pipe and 40 series flowmaster, it will sound like it's got 300hp

[Jupiter Rover]

yah i bet. so what do ya'll think about getting one, if they were'nt so damn expensive? and any opinions on a cheaper exhaust system?

[300bhp/ton]

I'd get a custom made exhaust. Should be much cheaper.

Exhaust and snorkel won't really offer any HP gain. But it should make it feel more responsive.

The old Rover V8 isn't the best at giving out HP. To really see a difference you want to get long tube headers, slap an electric coling fan (pretty sure that year is viscous but I might be wrong), a nice cam and some better heads.

It will make a world of difference but it still won't be a HP monster. ~240bhp from a 4.0 litre is a sensible aim, so that's still a 50bhp increase over stock.

There's always supercharging or turbo charging, but you'll probably have to do a lot of fab work. A rear mount turbo should be pretty easy and cheap if you get the parts second hand, and in theory 300-350bhp should be quite easy.

[Jupiter Rover]

ohh ok. Thanks. yeah ill look into it. so whats this rear mount turbo you were talking about? and got any ideas where to start looking for what parts i would need? thanks. and were all those mods for the old rover v8? "The old Rover V8" <-- you speaking. . because the engine in the 03 are 4.6 L and 217 hp stock. Thanks

[TN-LR3]

it's much cheaper to have a muffler shop build up a custom system with a flowmaster 40 series, Headers for the 4.6 I have no clue

[300bhp/ton]

Originally Posted by Jupiter Rover

ohh ok. Thanks. yeah ill look into it. so whats this rear mount turbo you were talking about? and got any ideas where to start looking for what parts i would need? thanks. and were all those mods for the old rover v8? "The old Rover V8" <-- you speaking. . because the engine in the 03 are 4.6 L and 217 hp stock. Thanks

Yeah it's the same engine. The Rover V8 is essentially a Buick 215ci small block developed in the late 50's. Rover bought the rights from Buick sorted out the productions issues Buick had, and the rest is as they say history. It was 3.5 litres originally (I have one in my TR7), but 3.9, 4.0, 4.2, 4.5, 4.6, 4.8, 5.0, 5.2 and even 6.0 variants have existed over the years.

The rear mount turbo's would need to br custom fabbed. There's a company called STS (use Google) who make rear mount kits for Fbody's. Corvettes and GTO's. I would base a design on one of these. So all you need is a suitable size turbo, locate where the rear muffler is, run some tubing back to the intake. Fab up an oil feed and locate an air filter. On the cars the air filter is under the car, this isn't good for off roading, so I'd look at a snokel stlye setup but at the back of the car. Also you'd probably want somesort of gaurd to protect the turbo.

There's a couple of people who make headers. Janspeed (UK based but I have seen them on a US website) and there's someone else also. Try searching in the Discovery S1 forum, there was quite a bit of talk about exhaust, headers and performance a couple of months back.

[DevilDisco]

Saw the installation of twin rear mounted turbos on a corvette with LS2 and HorsePower TV on Spike this weekend. I think they got 100hp over their intial base line. I couldn't think of anwhere under a DII to place one that would protect it from underbody damage and not be so close to the fuel tank.
The trubo set up from STS looks like it replaced the whole exhaust system on the corvette. They also reprogrammed the ECU and installed bigger jets in the fuel rail. Ineresting but not sure how it would work on a disco and not compromise any of its ability.
I've been toying with the Idea of a Borla it said to up hp by 15 and torque by 20, but I think my money would be best spent on some Bosch +4 plugs and Magnecore ignition wires, probablyl 7.5mm. I understand you can really feel the difference with those. The Borla well its warranteed for 1millon miles, I think it would be a good investment if you knew you were going to keep the Disco that long.
If you want more power perhaps you should look into PowerChips. Rover connection has a pretty good deal on them. It will up the 4.6L's hp to 236 and torque to 327 on a stock DII, more with an intake and exhaust. With that combo if the advertised hp gains from K&N and Borla were true then you would get.
Lets say
5hp from the K&N
15hp from the Borla
19hp from powerchip
39 potential hp Gain.
Add that to 217 for a potential 256hp.
Cost.
K&N $50
Borla$550
Powerchip$490
Total $1090 roughly

I'd go with the powerchip, its the most bang for the buck but you have a vehicle down time of roughly 2 days because you have to mail the ECU to Powerchips, so they can reflash it. Just can't bring myself to mail it out.

http://www.roverconnection.com/

[300bhp/ton]

Originally Posted by DevilDisco

Saw the installation of twin rear mounted turbos on a corvette with LS2 and HorsePower TV on Spike this weekend. I think they got 100hp over their intial base line. I couldn't think of anwhere under a DII to place one that would protect it from underbody damage and not be so close to the fuel tank.

There should be loads of room, the stock muffler doesn't even take much of a beating and a turbo is smaller, so you might be able to locate it there and just add a shield over it. Not too sure about water submertion, but a front mount turbo could still be exposed to the same issues.

Originally Posted by DevilDisco

The trubo set up from STS looks like it replaced the whole exhaust system on the corvette.

Yes I think the STS kit replaces the whole catback, but you could fab up your own version and use the existing exhaust if you so wished.

Originally Posted by DevilDisco

They also reprogrammed the ECU and installed bigger jets in the fuel rail.

Yeah this may be the biggest stumbling block, not sure how to tune the modern Land Rover ECU's, but I'm sure it's possible.

Originally Posted by DevilDisco

Ineresting but not sure how it would work on a disco and not compromise any of its ability.

When I get opportunity I am going to try and fab up a system for my TR7 V8 (Rover V8). I think it's possible on a LR it will just need a bit of thought, planning and maybe a little R&D to get it right. I'm pretty sure there are some places in the UK which sell turbo manifolds for Rover V8's, but that might get even more costly and I bet the are designed for Range Rover Classics.

Originally Posted by DevilDisco

I've been toying with the Idea of a Borla it said to up hp by 15 and torque by 20,

I would take such a claim with a pinch of salt, its possible but I would think more like 5-8HP for just an exhaust.

Originally Posted by DevilDisco

If you want more power perhaps you should look into PowerChips. Rover connection has a pretty good deal on them. It will up the 4.6L's hp to 236 and torque to 327 on a stock DII, more with an intake and exhaust. With that combo if the advertised hp gains from K&N and Borla were true then you would get.
Lets say
5hp from the K&N
15hp from the Borla
19hp from powerchip
39 potential hp Gain.
Add that to 217 for a potential 256hp.

Be careful, chips are often designed to lean out fuel mixure and alter timing. These however are designed for a STOCK setup, if you use a chip on a vehicle with intake/exhaust mods then it may have no affect or even a negative affect. So it's worth checking it out first. Also IMO those HP gains look very optomistic. If you got 15-20HP gain from all of them I think that would be good.

Built 4.6's involving high lift cam, good heads and FULL exhaust often only see 280-285bhp.

[DevilDisco]

Originally Posted by 300bhp/ton

Be careful, chips are often designed to lean out fuel mixure and alter timing. These however are designed for a STOCK setup, if you use a chip on a vehicle with intake/exhaust mods then it may have no affect or even a negative affect. So it's worth checking it out first. Also IMO those HP gains look very optomistic. If you got 15-20HP gain from all of them I think that would be good.

Built 4.6's involving high lift cam, good heads and FULL exhaust often only see 280-285bhp.

When you send the chip they will ask you what kind of mods you have on the vehicle and take that into account. I spoke with one of the reps and said that a Cat-Back and Hi-flow intake could be added after the install without incident but they perfer if you do these before you send the chip tot them.

Their website pretty much tells you what they do, advancing the spark and making the ECU more "open minded", so that mod you to will have an affect on the engine instead of the ECU struggling to keep everything the way it was set to the factory. I think they may play with the fueling.

I'd just like to get the most out of the engine without actually ripping into it. Don't want to change the cams or anything like that my goal would be for the Engine to be like how it would have come form the factory if you they did not have to worry about how quiet the engine was, or thhink someone would try to put 87 octane in it on a regular basis.

For example I would not change the inake but I'd put a straighter pipe in there with no noise trap, and insulate it. A snorkle would come standard with every Diso, cool air is cool air. A freer flowing exhaust with a nice but not obnoxious sound. More efficient Headers, better plugs and wires.

[300bhp/ton]

Cool, well if it's custom tuning then thats not bad, although a local dyno shop may be able to do something similar without the need to send off the ECU.

[Jupiter Rover]

sounds good guys. you both know alot. Ill take a look into everything that was talked about. so DevilDisco , are doing engine mods to your rover. you seemed like you want to. if you do. let me know how it goes.!

thanks guys.
pete.