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Sierra sapphire dohc turbo technics.

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Old Jun 28, 2011 | 02:48 PM
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Default Sierra sapphire dohc turbo technics.

Hi just thought i would share a few pics of my saph project.
it started of as a base 1.8 cvh model with only 12tho miles one owner from new car. kept in a gararge all its life .

I also got hold of a 4x4 cosworth that was involved in a heavy front end smash and then left in a field for 7 years causing it to break its back from rust.I stripped it to a bare shell then changed all the parts over to the 1.8 . full wireing loom .full interior . and all the running gear abs ect. cleaning and tidying all the parts as i went . unfortunatly the engine took a alot of impact in the smash breaking the block and berrying the vavles into the pistons. then some one removed the plugs and rocker cover before it was parked in the field hence the twiky engine







more pics will follow when i sort my camera out . hope you like

Last edited by marky g; Feb 16, 2015 at 10:14 PM. Reason: Change of heading
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Old Jun 28, 2011 | 02:50 PM
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interesting project this as i have a twin cam saff too and it desperately needs more power

What parts did you use and from what car?

What ECU you running and any idea on expected power output?
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Old Jun 28, 2011 | 03:05 PM
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Originally Posted by R4N S S
interesting project this as i have a twin cam saff too and it desperately needs more power

What parts did you use and from what car?

What ECU you running and any idea on expected power output?
Hi thanks . iam running a complete standerd turbo technics kit . but i have added a decompresion plaite to the engine to maybe run a littel more boost i belive as a standerd kit they were some were between 175 bhp and 200bhp ive been told lots of differnt figuers .and wont no for sure untill i get it on the rollers . but some were around them figuers will be nice for now
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Old Jun 28, 2011 | 05:51 PM
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such a rare kit to have , only 52 TT kits ever made iirc. they use a t2 turbo and a 5 injector with its own ecu ...cool wee kit ...if you add lower comp pistons you can run some decent boost !

who did you get the comp plate from ?

cheers and good project !
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Old Jun 28, 2011 | 06:24 PM
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Mine was a t25 turbo when i had my old kit. Pretty sure they all where.
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Old Jun 28, 2011 | 06:32 PM
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Originally Posted by iamrab
such a rare kit to have , only 52 TT kits ever made iirc. they use a t2 turbo and a 5 injector with its own ecu ...cool wee kit ...if you add lower comp pistons you can run some decent boost !

who did you get the comp plate from ?

cheers and good project !
Hi thanks. 52 wow even less than i thought then. i was pritty lucky with this kit as it complete with every item from new and full working order. ive seen a few for sale now which are missing items esepecialy the frequancy limiter

I had the decomp plaite made by an engineering firm near me using a head gasket as a templaite

i would love to put lower comp pistons in but iam on a realy tight budget at the moment . its something iam looking into for the future though . woosner are on my wish list
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Old Jun 28, 2011 | 06:36 PM
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Cool. I used to have a turbo technics twin turbo xr4x4.
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Old Jun 28, 2011 | 06:39 PM
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Originally Posted by jim_robson
Mine was a t25 turbo when i had my old kit. Pretty sure they all where.
yes mine is t25 . i do belive they all were
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Old Jun 28, 2011 | 06:40 PM
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Originally Posted by BRIGSPORT
Cool. I used to have a turbo technics twin turbo xr4x4.
did they use t25 turbos
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Old Jun 28, 2011 | 06:59 PM
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Old Aug 20, 2011 | 05:58 PM
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No updates on this mate?
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Old Aug 21, 2011 | 08:23 AM
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Prefer it with the 4x4 bonnet
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Old Aug 21, 2011 | 06:21 PM
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yes ive got some updates to add just need to sort pics .ive been of work for 3 days to try and get things sorted on it . stock piled alot of parts first to hopefully fit them all on my days of and get it ready for mot but turned out some parts were the wrong ones this project is fighting me all the way
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Old Aug 22, 2011 | 07:34 AM
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Scrap the badboy bonnet, it looks wank.
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Old Aug 22, 2011 | 01:50 PM
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bad boy bonnet has gone in the bin I need to get the 4x4 one painted along with some other bits but have been messed around a few times with getting them sprayed so on the look out for some one ellse that doesnt charge insurance prices
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Old Aug 22, 2011 | 01:54 PM
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Originally Posted by marky g
bad boy bonnet has gone in the bin I need to get the 4x4 one painted along with some other bits but have been messed around a few times with getting them sprayed so on the look out for some one ellse that doesnt charge insurance prices
I have some spare 4x4 vents if eny one is interested . also a set of 6 braided brake hoses for a 4x4 (black dimond) . and a recuirculaiting bailys dv dump valve
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Old Aug 22, 2011 | 04:44 PM
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A few small updates to add . ive had a bit of troubel with the brakes on it . the fronts were only 260mm discs and callipers .and rears were 240 solids .so i bought cosworth front and rear discs and callipers of a guy on hear !! to hopefully fit straight on this is after refurbing the xr4x4 callipers to what you see below .( going to have to do this agian now to the cos callipers)

then realising the the front and rear hubs were diferent so i have had to source some of them aswell but this has turned into a dear job now after getting kind of ripped of on the discs and callipers and haveing to buy hubs.

idealy i would of put 2wd brakes on the front for the 4 pots but had already bought 4x4 coilovers before i new that you couldnt swap and change bits of 4x4 to 2wd






have allso started to change the colour on the roof lineing and piller trims ect sorry about the quality of the pics (camera phone)


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Old Aug 22, 2011 | 04:51 PM
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belive it or not them coilovers are only 12 month old . but after splitting up with my partner the car has been sat outside untouched . very pissed of about that they were my favorite part on the car
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Old Aug 22, 2011 | 06:59 PM
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You had this a while? I seen it over on FSOC before. Got one hell of a slam on the back end! What exhaust is that? I never seen a coupling like that before...
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Old Aug 22, 2011 | 07:30 PM
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Top project mate.The saff looks really clean.
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Old Aug 22, 2011 | 09:47 PM
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Originally Posted by Marcyg
You had this a while? I seen it over on FSOC before. Got one hell of a slam on the back end! What exhaust is that? I never seen a coupling like that before...
yes ive had it about 3 years or so it has been on fsoc
the project came to a stop for about 12 months due to splitting up with my ex partner and haveing to give up my home it was touch and go on haveing to be sold but iam pleased to say i managed to keep hold of it with a struggel and the build is back on
Iam really not sure on the make of exhaust would love to find out though
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Old Aug 22, 2011 | 09:52 PM
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Originally Posted by Glenn.
Top project mate.The saff looks really clean.
thanks mate it is starting to look abit tatty underneath from being sat on the sea front for over 12 months but nothing a good clean up and paint wont sort . ive been over it with a fine tooth come this week end and there is still not a spot of rust on it eny were
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Old Aug 27, 2011 | 07:01 PM
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marky i was ment to ask you ,do you have the turbo tech metal plates that were with the conversion ? would be intresting to see what yours say in relation to the turbo ?? ive asked a few people now and they are all saying that the TT kits for the twincams all used a t2 ....my plate says "TT154"
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Old Aug 27, 2011 | 10:05 PM
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As far as I know, all the DOHC kits were T25s, TT used T2s on the 2.9 twin turbo cars. My DOHC kit had a T25.
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Old Aug 28, 2011 | 11:19 AM
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Originally Posted by JFB Tech
As far as I know, all the DOHC kits were T25s, TT used T2s on the 2.9 twin turbo cars. My DOHC kit had a T25.
hi mate your on the sierra owners club arnt you ? its just you wrote this on there :

"I ran a Turbo Technics conversion for about 4 years. The engine itself is standard, just a drilling into the sump for the turbo oil return and the fitting of an overboost switch into one of the intake manifold legs. The compression is standard. It ran a 5th injector in an elbow bolted to the front of the throttle body, this was driven by a Digital Control Unit, taking a timing input from the coil and a signal from a 2 bar MAP sensor. The ignition was permanently altered using the octane adjust plug, all 3 wires were grounded (even though one of the wires raises the idle speed and didn't need to be done). Very importantly, there was also a frequency limiter fitted to the original MAP sensor on the car. This prevented the standard ECU "seeing" a boost figure as it would drop into Limited Operating Strategy. In this LOS mode, the injector pulse duration and ignition timing are fixed, the engine would detonate to death in a very short time if this was allowed to happen while on boost.

Finding a full kit is like finding hens teeth, Turbo Technics converted 52 cars in total. The full kit consists of the following items,

T2 turbo
Exhaust manifold
Downpipe
Intake elbow with 5th injector
Overboost switch
DCU with GM/Motorola 2 bar MAP sensor
Frequency limiter
Wiring harness
Intercooler
Boost pipes
Turbo inlet pipe from standard airbox
Oil feed adaptor
Oil feed pipe
Oil return pipe
Sump oil return adaptor
Fuel line T piece and hose
Vacuum T piece and hose
Octane adjust plug and shorting wire.

I know the system inside out, having stripped it off one car and fitted it to another one as well as making various modifications including building a new DCU when mine fried itself."

which now means im more confused than before lol if its a t25 its a different flange to a t3 ?
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Old Oct 25, 2011 | 12:04 AM
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It was supposed to say T25 not T2.
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Old Oct 25, 2011 | 12:27 AM
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ive dropped one of these tt dohc motors in my mk1 escort ,im sure mines a t25
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Old Oct 25, 2011 | 07:58 AM
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Nice project mate.. look's like a really nice shell. What did you do the headlining with? I'm wanting to darken down my interior a bit..
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Old Oct 25, 2011 | 09:19 AM
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i want to know where to get the turbo kit for the DOHC - anyone help?
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Old Oct 25, 2011 | 09:24 PM
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Originally Posted by sheerline
ive dropped one of these tt dohc motors in my mk1 escort ,im sure mines a t25
bet that goes well in a mk1 . what box are you running on?
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Old Oct 25, 2011 | 09:32 PM
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Originally Posted by cossie690
Nice project mate.. look's like a really nice shell. What did you do the headlining with? I'm wanting to darken down my interior a bit..
thanks mate . i did the headlining with satin black spray and all the plastic trim . i did the lining just see what it looks like black and was going to get it coverd afterwards but to be honest it looks mint as it is . just feals like pubes if you stroke it but when do you sit there strokeing your roof
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Old Oct 25, 2011 | 09:41 PM
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Originally Posted by R4N S S
i want to know where to get the turbo kit for the DOHC - anyone help?
there was a guy on fsoc that was on about selling his iam not sure if he did or not but will try and find out for you . you have be weary with what you buy with these kits now as there isnt a great deal left and alot of them are incomplete
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Old Oct 25, 2011 | 09:43 PM
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Glad to hear it's back on the agenda mate
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Old Oct 25, 2011 | 09:53 PM
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the rear axel is fitted along with brakes . front hubs and brakes have been fitted . all brake lines are in just need to bleed the system now .ive also fitted camber shims on the rear and a full set of 205 40 17s instead of the land rover look tyres that were on it , all thats left to do is get kit painted . and try and sort something to replaice the rusty steel fuel lines that run the full lengh of the car . does enybody have eny ideas on what to do with these please i was thinking copper but not sure that will be good for fuel and with the low stance it has now copper can be burst easy
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Old Oct 25, 2011 | 10:01 PM
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Originally Posted by mk22door
Glad to hear it's back on the agenda mate
thanks mate i was ready to sell the dam thing last month with the money ive waisted and time finding out the hard way with the brakes . but after a little break i got back into it and fell back in love with it again .
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Old Oct 25, 2011 | 10:35 PM
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Originally Posted by R4N S S
i want to know where to get the turbo kit for the DOHC - anyone help?
I had one on my old smokestone cossie replica ran about 2 years ago.
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Old Oct 27, 2011 | 10:57 AM
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if anyone can help out with the tt kit that would be great.

Jim, 2 years ago
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Old Oct 27, 2011 | 03:15 PM
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Originally Posted by R4N S S
if anyone can help out with the tt kit that would be great.

Jim, 2 years ago
I had mine up for sale on the fsoc but decided against it due to I know I'll never get another complete kit again, honestly they are so so rare . Btw on the subject of the turbo mine is a tt154 that's what's stamped on both the metal plates from turbo technices . If its a t25 then it's the same turbo flange as a t28 meaning its a different flange form a t3 you would get on an rs turbo which is strange because I heard that's a good conversion for them
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Old Oct 27, 2011 | 11:07 PM
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Originally Posted by R4N S S
if anyone can help out with the tt kit that would be great.

Jim, 2 years ago
What do you need a TT kit for anyway?

Good luck finding one there like rocking horse shit.

Its probably a better idea to by a manifold and build one yourself and run it on megasquirt.
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Old Oct 28, 2011 | 12:01 AM
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Originally Posted by marky g
bet that goes well in a mk1 . what box are you running on?
box is a mt 75 , just put a large tunnel in the shell , i bought a wrecked sierra off a neighbour which was converted from new ,so everythings now in the escort , loom , cooler , etc
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