[trackday_prep] Cameron's Mi16 / Gti6 Hybrid

[taylorspug 7]

I still cant believe how these pulleys could have been machined this badly in the first place, i mean 4-5mm is ALOT!

[Cameron 16]

I know!

They must have been CNC'd, so I have no idea how they could have got that far out. I'll take it to bits and see weather its the centre or the outer that is wobbly.

[taylorspug 7]

Do they have a location tab on the centres to locate them onto the cam? Its not something like that being marginally too big which is causing them not to pull up flush? I suppose all will be revealed when you get them apart...

[Cameron 16]

Could be, I'll have a look tonight if I get time.

 

In other news, its going in for an MOT today so I've brought it in to work to noise test it - 97dB @ 5K!! I thought it was going to be much louder. Will be interesting to see how many things it fails on, my guess is 8.

[Cameron 16]

Epic failure.

 

I think it failed on about 10 things, most of which are very quick fixes (such as adjusting the brake bias lever ). The most hassly one is that one of my front tyres is worn past the limit and the other is borderline, so I'll be looking for a couple of new A048s.

[swordfish210 20]

The most hassly one is that one of my front tyres is worn past the limit and the other is borderline, so I'll be looking for a couple of new A048s.

 

Nice cheap fix then

[maxi 36 1 Cars]

This maybe a silly question to ask 26 pages into the topic but why this engine combination? What is your logical reasoning for using a 1900 mi bottom end with a GTi6 head?

 

Thats not a trick question, im just interested in your reasons.

 

Maxi

[Cameron 16]

More than anything I just fancied trying it out. I rebuilt my Mi16 engine last year and the head was pretty much scrap, James suggested it as he was building an Xu7 and GTi6 hybrid so I thought why not. There is the hope of less oil accumulating in the head aiding in reducing oil starvation which sweetens the deal. The performance benefits are there too, higher compression due to the smaller combustion chambers, a more refined overall design and slightly better flowing ports, along with nice manifolds.

 

All that coupled with the lighter alloy bottom end of course.

[welshpug 1,661]

any idea why the cams didn't give you the power you were after?

 

just not suited to a standard manifold rather than ITB's possibly?

[Cameron 16]

Got the failure sheet.. we have:

 

01 - Rear fog lamp tell-tale not working.

Broken bulb in switch.

 

02 - Steering column top mounting bracket insecure.

Guess I forgot to tighten the bolts??

 

03 - Direction indicators flashing more then 120 times a minute.

Due to LED bulbs - LED flasher relay is on order.

 

04 - Front fuel system component insecure.

Need to zip tie the hoses in place.

 

05 - Nearside front (drive shaft) steering locking device missing.

No idea what that means, will ask tomorrow.

 

06 - Nearside front tread depth below legal requirements.

Damn.

 

07 - Front (ns & os) brake pipe inadequately clipped.

Needs zip ties.

 

08 - Rear (ns & os) brake pipe inadequately clipped.

Needs zip ties.

 

09 - Nearside rear brake pipe fouling moving parts.

Has come unclipped and very close to the wheel - eek!

 

10 - Exhaust emission hc content excessive.

Stupid cams..

 

11 - Nearside rear brake pipe fouling moving parts.

Touches exhaust back box - needs clipping.

 

So basically, lots of zip ties and a bulb needed!

The ballache is going to be the tyres, I don't think I can afford some within 10 working days. Anybody got a couple of 14" rims they can lend me?

[Cameron 16]

any idea why the cams didn't give you the power you were after?

 

just not suited to a standard manifold rather than ITB's possibly?

 

Exactly that. Plus my rev limit is just too low to make the most of them, despite the advertised power band being 3K - 7K.

Basically the pulsing just screws the fuelling completely, you can see it cycle from lean to rich on the AFR graph, then it finally settles down and starts making power - at 6.5K!

[welshpug 1,661]

sounds exactly like what happened when I tried a Pugsport gravel cam in an 8 valver (stock compression + manifolds, Motronic management), just blows the charge out at low revs!

Edited July 9, 2009 by welshpug

[Tom Fenton 1,542]

Is no5 the r clip on the end of the shaft not there??

[Cameron 16]

Aha! Yes it could well be. Good thinking!

[edbar 6]

Did you find out which part of the pulley is out? I'm in the same boat but was wondering if it is the centre could i not lathe it flat?

 

Did you find out which part of the pulley is out? I'm in the same boat but was wondering if it is the centre could i not lathe it flat?

[Cameron 16]

Not yet, I haven't had a chance to take it apart. I'm on holiday for a week as of Saturday so it looks like I'll be doing it when I get back.

[edbar 6]

O.k might have looked at mine by then, if i have i;ll let you know.

[James_R 3]

The lock limiter will be something to stop the wheel hitting the box on full right lock

 

REst of the sheet looks ok, self tapers and P-clips are better than zip ties

[Baz 421]

Bit of a shame ala the cams etc, shows promise though, i presume if it was on bodies it wouldn't be so bad? What's with not revving it higher though? It'll take 8k surely?

 

If you're around and wanna borrow a set of rims with legal tyres give me a shout.

 

On a side note, going to apply for your MSA license next year and come Sprinting?

[Cameron 16]

Yes I am!

Well, I'm more tempted by hillclimbs but I may do both depending on money situation at uni.

[Baz 421]

There's no hills though!

 

Basically the same, although without the hills. I'd do some if there was any local-ish!

[Cameron 16]

Good point, there aren't any in Herts are there, although I was going to do it in the south west. Might sign up for that then, would be in some silly category but ho-hum, its the taking part that counts.

[Baz 421]

Same as the class that i will be in the new car next year, and james if he pulls his finger out, Modified Production (D8).

[Cameron 16]

Sweet! Should be a laugh.

[Baz 421]

D9 even...

 

Here's a quick cut & paste of some typical SR's for an event a few weeks ago. I'd presume your car would fit straight into D9.

 

Category A : Standard Production Cars

No modifications are permitted unless stated below :- Wheels up to 1" wider are permitted but must be of original diameter. Replacement shock absorbers are permitted provided that they are of the same method of operation and have the same location points as standard. Coil and leaf springs must remain as standard. Replacement brake pads of any material may be fitted but brake discs and callipers must remain as standard. The front seats only and the steering wheel may be changed. It is permitted to install an approved roll cage and replacement seat belts or safety harnesses. Apart from these items no part of the car may be modified in any way, no additional parts may be fitted and nothing discarded. 4WD cars are not eligible for this class.

 

B. Road Going Saloon and Sports Cars (Excluding cars in Appendix 1)

2. Up to 1400cc 2wd

3. Over 1400cc to 2000cc 2wd

4. Over 2000cc 2wd

5. 4wd any capacity

Cars may be modified subject to the following:

The main chassis structure, suspension configuration and the number of seats are to remain as standard. No internal trim may be removed (except carpets), the back seat(s) must be complete and of the original type. The front seats may be replaced but both must be capable of carrying a normal adult in a reasonably safe and comfortable manner.

All glass and its raising and lowering mechanism must remain as originally fitted (except windscreen, which may be replaced with one of laminated glass if not fitted as standard). Cars in Category C may use aeroscreens.

The bonnet, doors and boot lid need not be of the original material but the silhouette above the centre line of the wheels must remain as standard. Wheel arch extensions are not permitted unless fitted as standard. The original type of cylinder block, cylinder head, gearbox casing and differential casing, are to be retained and in their original position.

General restrictions: Applicable to Categories A, B & C

Cars must be taxed, insured and MOT tested (where necessary), and road legal in all respects. Documentation must be produced at signing-on to verify this. Only those cars listed in the price lists of Top Gear, What Car, Autocar and Motor magazines for the year of manufacture are eligible for classes 0 to 5.

 

C. Road Going Kit Type Cars and Replica Cars (Including cars in Appendix 1)

6. Up to 1700cc

7. Over 1700cc

 

D. Modified Production Sports and Saloon Cars (Excluding cars in Appendix 1)

8. Up to 1400cc

9. Over 1400cc to 2000cc

10. Over 2000cc

Production derived vehicles not complying with the requirements of Categories A and B. Cars must comply with MSA Year Book Regulation I.82-102. (Competitors are reminded of MSA Regulations I.94 and I.95 of the 2009 Year Book regarding engines.).

 

Tyres: Cars in Category A & B may only use tyres in List 1A of the MSA Year Book

Page 196-202 [R.3.1.1 for 2008]

Cars in Category C may use tyres in List 1A or List 1B of the MSA Year Book

Page 196-202 [R.3.1.1 for 2008] It is recommended that those open top cars in Category C that use List 1B tyres install an approved roll cage. Tyres using a crossply construction are not permitted in Category C.