[Mk2] [Turbo] Rev 2 Turbo from overboosting to ruined

Anything and everything to do with mechanical issues with your Mk2

Moderators: IMOC Moderators, IMOC Committee Members

2mad
Posts: 5983
Joined: Sun Feb 28, 2010 12:11 pm
Location: uk

Re: [Mk2] [Turbo] Rev 2 Turbo from overboosting to ruined

Post by 2mad »

My memories awful so could be wrong .. Its a fuel cut defencer (some say defender) it allows the operator to turn boost up without hitting fuel cut .. it may also alow tuning of air/fuel ratios too but im not holding my breath ..

Good dyno numbers, cars got potential , i wonder how high they whacked up boost :-k



Have you ordered a boost gauge yet .


Edit .. its just a fuel cut defencer :thumleft:
bobhatton
Posts: 3351
Joined: Fri Aug 25, 2006 9:34 pm
Location: Bodmin Cornwall

Re: Just found my car is fitted with a DASTEK UNI-CHIP

Post by bobhatton »

Modena-360 wrote:Just found my car is fitted with a DASTEK UNI-CHIP

In ithe bundle of paperwork I have a rolling road print out for 271bhp and reference to the supply and fitting of the uni-chip.

Does anyone know what this is, what it does and if removing the manual boost controller will be part of the issues my car is having?

It looks like during the dyno set up there are lots of references to NOT touching the bleed valve which I guess is the Manual boost controller.


Unichip – The universal performance remappable ECU?
Designer for turbo set ups on F1 cars, and Nitrous Oxide Systems of the USA in the 80s
2mad
Posts: 5983
Joined: Sun Feb 28, 2010 12:11 pm
Location: uk

Re: Just found my car is fitted with a DASTEK UNI-CHIP

Post by 2mad »

bobhatton wrote:
Modena-360 wrote:Just found my car is fitted with a DASTEK UNI-CHIP

In ithe bundle of paperwork I have a rolling road print out for 271bhp and reference to the supply and fitting of the uni-chip.

Does anyone know what this is, what it does and if removing the manual boost controller will be part of the issues my car is having?

It looks like during the dyno set up there are lots of references to NOT touching the bleed valve which I guess is the Manual boost controller.


Unichip – The universal performance remappable ECU?



Good stuff bob, werent sure it could do remapping 8-[
GreddyMR2
Posts: 950
Joined: Thu Nov 10, 2011 6:35 pm
Location: Lithuania
Contact:

Re: UPDATE - and a question

Post by GreddyMR2 »

bobhatton wrote:
Modena-360 wrote:

If the exhaust manifold has to come off, is there any work that should be done at the same time?

Any idea of a very rough finger in the air price what this is likely to be for fixing the manifold leak, replacing the wastegate Actuator and supplying and fitting a manual boost controller?



As Jon has said, replace the knock sensor first, but not an Ebay one, get one from Toyota.
The wastgate will be ok, forget about a boost controller and get the engine running as Toyota designed it first to make sure you do not have other problems like damaged pistons.
You do need the top grade of fuel also, and your timing should be set to 8 deg btdc


Bob, can I ask why 8 and not 10 BTDC as supposed to be?
ashley
Posts: 7628
Joined: Tue May 13, 2008 8:08 pm

Re: [Mk2] [Turbo] Rev 2 Turbo from overboosting to ruined

Post by ashley »

Probably cos we don't have as high octane fuel in the UK as they do in Japan, so need to back the static advance off a bit to help avoid knock.
bobhatton
Posts: 3351
Joined: Fri Aug 25, 2006 9:34 pm
Location: Bodmin Cornwall

Re: [Mk2] [Turbo] Rev 2 Turbo from overboosting to ruined

Post by bobhatton »

ashley wrote:Probably cos we don't have as high octane fuel in the UK as they do in Japan, so need to back the static advance off a bit to help avoid knock.


That is right.
Designer for turbo set ups on F1 cars, and Nitrous Oxide Systems of the USA in the 80s
Modena-360
Posts: 11
Joined: Tue Mar 17, 2015 8:58 am
Location: Bromsgrove
Contact:

UPDATE!

Post by Modena-360 »

So on the advice of this forum I took my MR2 Turbo Ferrari replica to Mr Twos. The guy there was a legend and fixed the overboosting quickly. Unfortunately he also discovered an exhaust leak that due to the bodykit was impossible to fix without dropping the engine. He couldn't do it because he didn't have the right ramps to deal with the bodykit.

I took the car to a local garage who for the princly sum of £1700 :( dropped the engine, replaced all gaskets, belts, pipes and tubes and put it back together again.

Now the car runs like a dream and feels like a 280bhp car.

Unfortunately on my first high speed run on the motorway, the passenger front wheelarch liner decided to detach itself and got wedged between the car and the tyre. It acted as a brake and essentially made me turn left from the fast lane of the M5. luckily I didn't hit anyone and the only damage is the ripped up wheelarch liner, which I will look for on another post. I think it was an oversight from the garage after all the work i have had done.

Anyway its nice to get the car back with full power and no leaks!

The next project is the brakes which are standard MR2 Turbo and are woefull
gavsdavs
Posts: 702
Joined: Thu Nov 15, 2012 2:31 pm
Location: saahfeeeeastlaandun

Re: UPDATE!

Post by gavsdavs »

Modena-360 wrote:
The next project is the brakes which are standard MR2 Turbo and are woefull

Standard brakes are okay - but your calipers might be a bit seized - not unusual if they've not been refurbed.

http://www.camskill.co.uk/m5b0s604p5537 ... W20_3S-GTE
http://www.camskill.co.uk/m5b0s604p1178 ... 91_onwards
Post Reply

Return to “Mechanical”