Robert (jay ) johnston .. vauxhall 2.0 8v turbo mk2 astra

screamer69 · Post by **screamer69** » Sat Jul 08, 2006 1:24 pm

robert (jay) johnston

vauxhall/opel 1991 cavalier/vectra gli

2.0 8v

modifications ...

low compression forged pistions running 8.0:1
steel forged rods
steel head gasket
t34 turbo exterenal wastegate
direct port injection
440 cc injectors running @ 3.5 bar (474cc)
8 litre intercooler with 3in inlet and outlet
samco hoses

running megasquirt 1 version 3 board, 4 barmap sensor , running squirt and spark

running 60-2 tooth wheel decoder

after not to much trouble its runns very well the only main problem i had was that i had the dwell to high

ego correction is turned off
not running any idle controll

it has been part mapped on the rollers to 11psi ( due to fuel pump packing up ) it made 205 bhp and 315nm torque

it will be going back to be mapped to 28 psi

things to do ......

new profiled turbo cam
stronger head work springs etc
bigger turbo
and 75 shot of nos

and im not stopping till i get it over 400bhp !!

a big thank you to james and lance for the help they have given me

and jerry @ d.i.y auto tune for supplying the m/s and wideband

pics will be added as soon as i can find some nice ones

screamer69 · Post by **screamer69** » Sun Oct 01, 2006 1:51 pm

slight update

since haveing it in the cav ive decided since its run so well with out any major problems i decided to take the engine out of this heavy car and stick it in a mk2 astra runiing the same gear as above so ive lost over half a ton of weight

still wating to get it full boost mapped yet ( 2bar )

and change from cap and arm to dis pak but it still runns sweet as a nut when i took it out the cav it was stood for nearly 2 months sitting on an engine stand while i got the astra ready

but the day can it went in finaly run a proper relay for the fuel pump switched ignition on pump primmed up fine and 1st turn of the key it started and run spot on !

my only regret is that i waited so long before getting my m/s im thinking about getting another and useing that on my day to day car i carnt fault it !!

screamer69 · Post by **screamer69** » Tue Mar 13, 2007 10:41 am

another update to ad to this

over the last few weeks ive been messing around with the boost controller side of it and im happy to say we have it working rather well at the moment its now holding 17 psi of the controller and flick the switch and 7 psi of the wastegate a big thanx to PrOxLaMuS as i was haveing trouble with bits of it but we still need to tune the lower part of the controller map so it spools up sooner !!

next on the list ......

fan controll
nos

screamer69 · Post by **screamer69** » Thu Mar 22, 2007 3:47 pm

another update

after another few nights messing around ive got the boost controller to hold 22psi it still needs a few tweeks but on a hole its working as it should

going to try duel table in the next few weeks so ive got better controll over boost spark map it might be better to tune it might not ill just have to wait and see

screamer69 · Post by **screamer69** » Thu Feb 21, 2008 1:52 am

update

been a while since i updated it

after a few sets of main bearings going bang the car seems stable its holding 22.5 psi but its not the m/s doing it now i have a seperate controller

turbos been changed to a t3 with stage 3 wheel and interal wastgate

im running swichable maps for when useing nos ( im haveing trouble with it at the moment )

the car as is runs standing 1/4 @12.8

aprt from that i really carnt complain apart from i keep breaking gearbox`s

a big thank you to james/jerry who helped the most but a thanks to everybody else thats helped me the last few years

website: http://www.vauxhall-8vturbo.co.uk

GeorgeGt · Post by **GeorgeGt** » Thu Feb 21, 2008 4:34 am

Congarts! Some really nice quarter miles

I hope to add another turbo to my setup and see how my C20XE will like twin TD04H-13C turbos

Made 475nm torque and 220kw with only one and engine seems really unhappy at high revs due to small trubo

screamer69 · Post by **screamer69** » Thu Feb 21, 2008 4:44 am

cheers m8 !!

i keep looking at my spark m8 and im not happy with it i think its to far retarded so im looking at that over the next few weeks ready for the 8th of march

GeorgeGt · Post by **GeorgeGt** » Thu Feb 21, 2008 12:55 pm

You mean that it is actually killing boost and not making it ? I have wondered about that myself , but i have no time atm to try different settings and play with cams. Just bought myself another vectra 2000 4x4 (cav mk3 gsi 4x4) , but will try as soon as i get time.

screamer69 · Post by **screamer69** » Thu Feb 28, 2008 12:21 pm

update 28 feb 08 ..

fuel tanks been ripped out and a 3 gallon fuel cells sitting in the boot a new pumps been added flow rate of 260 lph @ 8bar and ive had to upgrade the injectors to 606cc as my 440`s were running 98% duty but saying that these ones are running 90% under full boost

had the car back out and it turns out that the spak map was way out i was mapped 2 years ago and made 220 bhp @11 psi on a t34 turbo

since then we never bothered with the spark map just used it as is but it now runns a t3 with stage 3 wheel and it turns out it was nearly 15 deg out off boost on average and nearly 10 deg on boost since we spent last sunday out with it the car feels a lot better and smoother and pulls like a train all the way to the redline (6500) and it sounds compleatly different before it sounded like a tank when you gave it some welly but now its a lot more quiet .. even at 22.5 psi boost we havent tryed it with the nos yet

due to a problem with the controller

GeorgeGt · Post by **GeorgeGt** » Wed Mar 12, 2008 1:38 am

so how the spark table looks now ? 10deg without boost at full throttle and 15 deg @ full boost on high rpm or what ?