MG ZR: Cams & Maps

[procta]

I don't think mine is running all that well either, as the MPI fan system keeps coming on, so think the sensor is on the blink. As my Spi fan system comes on 1st.

[Piggy]

Surely your headbolts are about far stretched by now?!

[lolsteve]

Given its mostly apart would you not just do it correctly now? spend a day removing and lapping the valves and cleaning head properly, be very surprised if those valves aren't leaking, if even a small bit.

Really don't want to have to work out in the car park again. We're looking for a house with a garage at the moment so this can be taken off the road and done properly. Motivation is also at an all time low, looking at a brand new 4-2-1 manifold on the floor right now and not excited to fit it in the slightest. Want to be out driving this or building it properly instead of dicking about in a crappy car park every weekend 

I don't think mine is running all that well either, as the MPI fan system keeps coming on, so think the sensor is on the blink. As my Spi fan system comes on 1st.

probably headgasket

#facebookmechanic


Headbolts are brand new KAMAX ones (oe spec) . Bought a new set as wanted this done right but meh now

[procta]

I recon it could be, I know one of the oil stem steels are away.

[lolsteve]

Well it's alive

Left it alone for about half a week so before doing anything I turned it over to check that no coolant had leaked into the cylinders so i wouldn't bend a valve. Being smart n that, no problems there

Put it all back together bar the alternator/pas belts incase it had to come back. Cranked over a few times without coilpacks on to get oil flowing as it had been sat. No oil/coolant leaks.
Started up and it ran. Interior fans blowing hot so hopefully no air in system. bit of smoke from exhaust manifold but could have been burning something off. giving it a rest now as its been a long day after travelling up from Southampton 

https://www.youtube.com/embed/RTiqC0v4svI

[procta]

good news!

[Jonny81191]

You do realise the only way this will beat a '6 is if you drop the diesel lump in it?

[procta]

You do realise the only way this will beat a '6 is if you drop the diesel lump in it?

or go t series

[Jonny81191]

You do realise the only way this will beat a '6 is if you drop the diesel lump in it?

or go t series

That too.. Or buy a '6 and put some mild cams in. That'll beat a stock '6. /floggingadeadhorse

[procta]

You do realise the only way this will beat a '6 is if you drop the diesel lump in it?

or go t series

That too.. Or buy a '6 and put some mild cams in. That'll beat a stock '6. /floggingadeadhorse

 
or he could swop loose a lot of weight out of that posh rover, but then again, i would say f*ck it and super charge a 6!

[Matt-Rallye]

You do realise the only way this will beat a '6 is if you drop the diesel lump in it?

Sold a mate some SDi injectors because apparently they were going to be the bees knees in tuning his diesel mg zr... still gets blown by my other mates stage 1+ HDi

[lolsteve]

The more you say it won't do it the lighter my bank account becomes with me trying to prove you wrong
Besides I like the K series, it's easy enough for me to work on despite my lack of mechanical skill

Dont know much about the l series but i think they have MAF issues so perhaps if he gets it mapped out or replaced it'll be a more even battle

[Matt-Rallye]

He has the same determination as you, his 160 does go well just not as well as my rallye

His T series powered beast is another animal altogether despite serious driveshaft shredding issues

[RetroPug]

Has anyone actually got any 1/4mile times for 306 dervs?

[Poodle]

Dum-dum reported some quarter mile times back in the day, around the 14 second mark iirc.

[Matt-Rallye]

Dum-dum reported some quarter mile times back in the day, around the 14 second mark iirc.

[Piggy]

That would be about right I think...
1150kg, 167bhp... About 14seconds would seem right

[Matt-Rallye]

That would be about right I think...
1150kg, 167bhp... About 14seconds would seem right

Your joking right?

14 seconds is throttle bodied lightweight 106 gti territory.

My friends mk1 fiesta weighing in at around 800kgs and with 170bhp on tap with diff etc (cover car last months fast ford mag if anyones interested) which is built for the strip and running slicks pulled a 13.9 and thats damn fast!

[Midnightclub]

Those drag runs were done in his black HDi too IIRC, not a GTi6

[welshpug]

14 seconds is throttle bodied lightweight 106 gti territory.

naah, I've seen an S1 rallye pull 12.7, only had 199 bhp, still road legal.

[lolsteve]

Stock(ish) 160s are apparently doing about 15.5 ..in case anyone was interested

[Matt-Rallye]

Thats quite respectable tbh. I would expect the same from a gti6

[Piggy]

That would be about right I think...
1150kg, 167bhp... About 14seconds would seem right

Your joking right?

14 seconds is throttle bodied lightweight 106 gti territory.

My friends mk1 fiesta weighing in at around 800kgs and with 170bhp on tap with diff etc (cover car last months fast ford mag if anyones interested) which is built for the strip and running slicks pulled a 13.9 and thats damn fast!

You're dead right, I got my kg to lb wrong. Redid the calculation, 15.1/15.2seconds. 

I thought 14 was a bit quick.

[Matt-Rallye]

Utter bollocks sorry piglet, look also at the gearing on a hdi box. Simply no way your gonna be in the 15's unless its some mental stage 3 build.

[welshpug]

not enough RPM and too many gearshiftings, though that 106 I mentioned was crossing the line at about 115 in 5th near the limiter

dog box ftw.

[procta]

Stock(ish) 160s are apparently doing about 15.5 ..in case anyone was interested

that cause they are heavy rovers!

[Anton]

Dum-Dum did 14.8 i believe at Santa Pod. His old stage 2 hdi.

[ADV_93]

Toretto would do a 1/4 mile in a HDi in 14

[lolsteve]

So fallen in love with this again after a few months of slowly disliking it more and more due to this and that

Being the passenger while it was driven by someone else showed me that it's alot more capable than I thought it to be and taught me a bit more on how to possibly drive it more effectively

For example at castle combe I'm spending most of my time in 2nd gear especially on corners as I would over brake and think i needed to be hitting the high notes for the power band which often left me bouncing the limiter in a very vtec fashion
Now I've been reading up about left foot braking/trail braking and tried out holding out in 3rd gear on a nice country road whilst carrying the speed more.

Luckily for me this weekend is a small track day so can practise some stuff / try and get out of the second gear hogging habit

Since I've also fallen for it I'm going to work on getting it more presentable. First a couple of shiny bits such as red 8mm ignition leads and a rear tow hoop thing (so jdm) next up is getting the body work fixed i.e no scratch or rust . Still need to fit the new janspeed manifold and sports cat which might release a couple more ponies


16/09/15:
Just been looking into the camshaft/mapping stuff during my lunch break and thought i'd upload some details with some maths    (vvc start with full duration is taken from someones measuring as couldnt find a official figure)


Stock exhaust camshaft duration = 51+21+180 = 252
Piper camshaft duration = 62+22+180 = 264
Exhaust cam duration increase = 12 degrees

[jammapic]

This thing is a beast... I love it.

People will mock you, ignore it... Such a hoot to drive - just needs softer springs and smaller wheels :-)