IPD Turbo Performance Camshaft -700/900

[foggyjames]

Yeah, it's only bit bitey...unless you're ham footed, or more to the point getting too used to a slusher :-P

The M90 TD disc has the correct splines for an M90 input shaft, but the correct diameter for a 'dished' flywheel, so you can ditch the dual mass if you don't like it.

To be honest, I get on better with the DM in a daily driver than the dished flywheel / diesel disc combo. The DM flywheels start to get flakey above about 250lbft (but the larger 240mm clutch will be ok), while the diesel 228mm clutches give up at about 300lbft.

Unless you have radical plans, I'd leave the standard flywheel / clutch arrangement in. The 97 940 I borrowed for a month earlier in the year was a much more relaxed drive than the above 740 with the dished flywheel and diesel clutch, never mind the 4-puck sintered disc.

cheers

James

[amaz'in]

Hi James,

Thanks for that, it's kind of what I was thinking, I'm not an aggressive driver and am probably just aiming for 225bhp..ish..i'm just thinking the further I push it, the less daily friendly it will be?

Just thought the Cam makes sense if we are going to put the 531 head on, Wagonfury say's I will probably be fine with just ditching the PLUS kit and raising the Boost a smidge for my needs.

I bought the 012 AMM as he didn't need it anymore, is it worth me getting Freds chips? I have a Bosch 984 etc here.

J

[foggyjames]

To be honest, I don't really rate the turbo plus kit. Half the time it doesn't seem to work, and even then it's only at high RPM, etc. You're better off with a good quality aftermarket boost controller, which will give you full boost as soon as the turbo spools.

Fitting a larger turbo (one of the bigger TD04 family models...a 15G, 16T, 18T, or 19T) will make more of a difference than almost anything else (except raising the boost) - the standard turbo is 'too' small, really.

Chips, injectors, AMM, turbo (especially an 18T/19T), 531, cam and exhaust...that lot should see you most of the way to 300bhp at 15-20psi, and just as tractable as standard.

The next step above 300bhp is where it starts to become a little more compromised. A worked over head (or a 16v swap) makes more power without making it uncivilised, but the next stage - using "lots of turbo" (i.e. a bit one with lots of boost) - on a relatively limited displacement engine is not a recipe for smoothness.

You also start to run into other problems above 300bhp (or more to the point, the kind of torque you'll be generating to make more than 300bhp)...not least getting the power to the road. There isn't space in the wheel wells for the 255+ wide rubber you need to put 350-400bhp down in a 1400kg car.

"Up to 300"bhp can be achieved reasonably easily, and without ruining the character of the car. I'd aim for the car to be capable of somewhere between 225 and 300bhp...and you can always turn the boost up and down (on an electronic boost controller) to suit your mood.

cheers

James

[amaz'in]

Hi James,

Wagonfury fixed me up with some near new monster injectors, uprated Cossie ones, but I will tuck them away, as I think they are way beyond what I need.

What's the power limit for my standard Injectors?

Yes an electronic boost controller sounds ideal, with the Plus kit removed, the xcar becomes a 165bhp motor, so I would initially like to head to 200/225bhp...maybe 250bhp top?

Will I need to use the 012 AMM and freds chips for this? if Freds chips make the lump run better then perhaps I should go for it or will it be wasted money? I always run with Optimax, the Ammo hates BP or less, and the 940 likes it too.

J

[amaz'in]

Hi James,

Must drop in on you guy's sometime, if I say I will bring my R sport turbo kit parts then you may not be able to refuse me entry.

J

[foggyjames]

Generally you fit the 3" AMM (is that the 012?) at the same time as larger injectors - the two balance each other out, and keep things happy. Go too big on the injectors without tweaking the AMM, and it won't be happy at anything other than idle. One trick is to use an adjustable fuel pressure regulator to 'dial in' your AFR (measured with a wideband lambda sensor) at full load. The computer then has to work the rest out for itself. Full load is the important part.

First port of call...chips. That will allow more boost, then you can take it from there. I'd get a wideband fairly early on, so you can see what's going on.

We had the standard injectors mapped fine up to about 15psi (from memory) on a larger turbo (Garrett T3/T4 hybrid...so not huge, but quite a bit bigger than stock), but they were flat out at that point. That was probably somewhere around 250bhp, so 225bhp is probably a safe number for an LH-powered car (which may not allow such high duty cycles as MS). We're now running Bosch 680cc injectors, which have more than twice the flow rate of the originals.

Now for the amusing (or sad, depending on how you look at it) part...

Because we have control of the ignition timing, we have it mapped for supermarket 95 octane. 27psi of boost on that naff fuel is the record to date

cheers

James