ausmini :: View topic - modifying a 1995 1.3i Rover

Just do your research into what the 99 model John cooper cars had and do the same.
They were claimed 90 hp, though I don't think any bodies actually did that.

you mightn't want to hear this, but the best thing to do is replace the injection with a carb - the injection really is very asthmatic

guy in my local club has a deluxe with an SPi, and was startled at how much more torque my car has with twins

simon k wrote:

I was thinking of doing that, Its alot harder to find someone to work on an injected car

The SPI system was designed for fuel economy. It is the bottleneck in the possible power output from the engine. Even with a modified pressure regulator, injector, plugs, cam and an eatom M45 you still wouldn't get 100 hp without going to a 7 port head by which point you may as well ditch the MEMS system.

As Simon says, whack a carby on there. There'll be a weight saving with that too!
:lol:

Harley wrote:

weber 40 or 45 /or/ twins 1.5 or 1.75 ? also would this pose a problem with the fuel pressure from the injected pump?

chip the computer!, you guys with your carbies :roll:

no cars use carbies anymore these days.

you can get a chip/flash or you can go with an aftermarket computer or piggyback and setup your fuel and ignition on a dyno, that should make a huge difference.

camshaft is also a good idea, as is working the head.

$1500 is also enough for NOS :lol:

i'd leave the nice 3.2 diff

I was thinking of doing that, Its alot harder to find someone to work on an injected car

DJ wrote:

I was thinking of doing that, Its alot harder to find someone to work on an injected car

Pretty much impossible to find anyone up here who would touch an SU....!

Author:	DJ [ Wed Dec 01, 2010 8:22 am ]
Post subject:	modifying a 1995 1.3i Rover
Hey guys and girls I'm just after some Ideas please. The car - 1995 1.3i (1275) Rover, already has extractors and exhaust + K&N filter I'm after a little more grunt and am willing to sacrifice a little top end speed if needed. The budget is $1500ish but I will need someone to do the work for me so this will include labour. Thanks for the ideas

Author:	74snail [ Wed Dec 01, 2010 8:32 am ]
Post subject:
Kent 274 and change the diff to 3:44.1 ( I pretty sure yours has a 3:2.1 ) .

Author:	Harley [ Wed Dec 01, 2010 9:09 am ]
Post subject:
Just do your research into what the 99 model John cooper cars had and do the same. They were claimed 90 hp, though I don't think any bodies actually did that.

Author:	simon k [ Wed Dec 01, 2010 9:42 am ]
Post subject:
you mightn't want to hear this, but the best thing to do is replace the injection with a carb - the injection really is very asthmatic guy in my local club has a deluxe with an SPi, and was startled at how much more torque my car has with twins

Author:	simon k [ Wed Dec 01, 2010 9:44 am ]
Post subject:
Harley wrote: Just do your research into what the 99 model John cooper cars had and do the same. They were claimed 90 hp, though I don't think any bodies actually did that. the claim was 90hp at the flywheel, it's not hard to get that out of an 1100 or 998

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Author:	DJ [ Wed Dec 01, 2010 9:56 am ]
Post subject:
simon k wrote: you mightn't want to hear this, but the best thing to do is replace the injection with a carb - the injection really is very asthmatic guy in my local club has a deluxe with an SPi, and was startled at how much more torque my car has with twins I was thinking of doing that, Its alot harder to find someone to work on an injected car

Author:	Harley [ Wed Dec 01, 2010 10:00 am ]
Post subject:
The SPI system was designed for fuel economy. It is the bottleneck in the possible power output from the engine. Even with a modified pressure regulator, injector, plugs, cam and an eatom M45 you still wouldn't get 100 hp without going to a 7 port head by which point you may as well ditch the MEMS system. As Simon says, whack a carby on there. There'll be a weight saving with that too!

Author:	simon k [ Wed Dec 01, 2010 10:04 am ]
Post subject:
DJ wrote: simon k wrote: you mightn't want to hear this, but the best thing to do is replace the injection with a carb - the injection really is very asthmatic guy in my local club has a deluxe with an SPi, and was startled at how much more torque my car has with twins I was thinking of doing that, Its alot harder to find someone to work on an injected car and only a single 1 3/4" - a HIF44 - no need for a weber or twins or anything

Author:	DJ [ Wed Dec 01, 2010 10:07 am ]
Post subject:
Harley wrote: The SPI system was designed for fuel economy. It is the bottleneck in the possible power output from the engine. Even with a modified pressure regulator, injector, plugs, cam and an eatom M45 you still wouldn't get 100 hp without going to a 7 port head by which point you may as well ditch the MEMS system. As Simon says, whack a carby on there. There'll be a weight saving with that too! weber 40 or 45 /or/ twins 1.5 or 1.75 ? also would this pose a problem with the fuel pressure from the injected pump?

Author:	simon k [ Wed Dec 01, 2010 10:12 am ]
Post subject:
DJ wrote: Harley wrote: The SPI system was designed for fuel economy. It is the bottleneck in the possible power output from the engine. Even with a modified pressure regulator, injector, plugs, cam and an eatom M45 you still wouldn't get 100 hp without going to a 7 port head by which point you may as well ditch the MEMS system. As Simon says, whack a carby on there. There'll be a weight saving with that too! weber 40 or 45 /or/ twins 1.5 or 1.75 ? also would this pose a problem with the fuel pressure from the injected pump? just an 1 3/4" and yeah, need a normal fuel pump. Have a look on some of the UK forums, they do it a lot over there

Author:	Super-mini [ Wed Dec 01, 2010 11:37 am ]
Post subject:
chip the computer!, you guys with your carbies no cars use carbies anymore these days. you can get a chip/flash or you can go with an aftermarket computer or piggyback and setup your fuel and ignition on a dyno, that should make a huge difference. camshaft is also a good idea, as is working the head. $1500 is also enough for NOS i'd leave the nice 3.2 diff

Author:	blue_deluxe [ Wed Dec 01, 2010 11:48 am ]
Post subject:
Super-mini wrote: chip the computer!, you guys with your carbies no cars use carbies anymore these days. you can get a chip/flash or you can go with an aftermarket computer or piggyback and setup your fuel and ignition on a dyno, that should make a huge difference. camshaft is also a good idea, as is working the head. $1500 is also enough for NOS i'd leave the nice 3.2 diff The problem doesnt lie with injection system. Its the method of injection thats the problem. Its effectively an electronic carburettor. So even if you did get an aftermarket ecu any gains you got by would be negligible. If you swapped to a cross flow head then injection is a good thing.

Author:	Fat Boy Dave [ Wed Dec 01, 2010 11:53 am ]
Post subject:
If you keep the injection and existing ECU your camshaft options will be limited. The standard Map ECU doesn't cope with anything over a mild camshaft. Like Simon stated best bang for buck is to ditch the injection and put on a carb (you don't even need to take the engine out for this one). Surf some of the UK Mini forums and you'll find a couple of "how to's" on what is requried. Then if you want change the camshaft, headwork, etc you'll get all the gains and none of the hassle.... The main reason they went from carb to injection was to meet emission requirements in the UK. If you really want to keep the injection one of the mini mags had a recent article on changing to aftermarket ECU using this: http://www.specialist-components.co.uk/cnb/shop/sconline?productID=112&op=catalogue-product_info-null&prodCategoryID=35 Install was pretty much plug and play but you would need to invest in some rolling road time to set it up properly, this would then allow you to use some more aggressive cam profiles if you wish.

Author:	Hanra [ Wed Dec 01, 2010 12:06 pm ]
Post subject:
DJ wrote: I was thinking of doing that, Its alot harder to find someone to work on an injected car Pretty much impossible to find anyone up here who would touch an SU....!

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Author:	mattsmadmini [ Wed Dec 01, 2010 1:02 pm ]
Post subject:
Hanra wrote: DJ wrote: I was thinking of doing that, Its alot harder to find someone to work on an injected car Pretty much impossible to find anyone up here who would touch an SU....! Surely there would be enough bogan V8's to warrant the need to have a carb specialist up there?