SBT83

+1 fit something bigger! Better to be in limits than running on them

rsmark86

iTrader: (3)

I got a good condition cosworth 4x4 t3 for £150, then just make a downpipe up

I'm on a silvertop with stock rods and c20let pistons so I can't push either turbo lol

I want an easy 240/250bhp and leave as that

colins2

ok chaps so lets if i were to build an engine say a black top put a set of steel rods in it and a set of let pistons would that be better than the st170 bottom end? are the st pistons as strong as the let pistons. and at what point does the cams limit. just looking for reliability as it would be a track toy

rsmark86

iTrader: (3)

People on here think so, but on vauxhall forums there's plenty of people who only change them over 400/450bhp and a couple of people have run 500bhp

So no reason why they can't do the same in a ford, it's all the effort of getting the rods machined for them and having to be good quality

As a friend got a set off ebay and they big ends were 50mm which was way to big too use and needing to buy some decent rods

Karlos G

iTrader: (4)

Target BHP?

rsmark86

iTrader: (3)

Anyone going for a budget build and a punchy userable 300bhp then use this thread, it's the ultimate way of getting very strong power for a lot less than other routes

If you want anything over 350bhp then I would just save the agro and call PEC and get a full piston and rod kit with bearings and gaskets and arps, and fit devil developments valve springs

You will spend to much time and money finding a mint set if pistons from a c20let and then having to get steel rods and get them machined, block will need refacing, pistons pocketing, boring to 86mm and so on, and the comp ratio is 7.:51 ish and is low compaired to modern standards

It will work fine but if I had aftermarket management I would want my comp at least 8:0:1 -8:5:1 they drive so much nicer

You might only save £100 by time you buy all the bearings and gaskets and get the pistons checked/ cleaned and new rings


It's a good route if you have a silvertop 2.0 and want a budget build like me as its just strip and mod the engine you have and only requires a set of pistons and new rings and bore the block and fit back together with arps and decent valve springs and can see around 260/270bhp

colins2

250 reliable any more would good but 250 would be the target.
colin

CrOwSoN15

Mega punchy though, it's fine if you don't mind having it rebuilt once a year

SBT83

I'm on the look out for a T3 if the price is right, but GT series other wise

Karlos G

iTrader: (4)

Then the St170 bottom end route as per this guide is the most cost effective.

rsmark86

iTrader: (3)

Same as karlos for 250bhp, will be very punchy so will feel very fast with bugger all lag

rsmark86

iTrader: (3)

Stu Collins has a gt28 conversion for sale that needs a rebuild, I'm sure he said something silly like £100

turbobill

Sorry to bring up a old thread, but been searching for ages on doing the zetec turbo conversion and this sounds ideal to me, as id like about 300 bhp but a few questions just to clear up confusion

(1) I use the st170 sump and oil pick up?

(2) do i use the st170 waterpump?

(3) what cambelt would i use, and what headbolts

(4) can i use fiesta rs turbo management ( ofab )

Think that is all the questions for now lol

Sorry if my questions have been answered but there the few im a little unclear on,
Cheers bill

luke19790_3

Zetec head bolts and cam belt, yes you can use the st170 sump and water pump

turbobill

Oh okay lovely thanks for the reply, what about the management?
Cheers bill

studabear

you could use the management, but your gonna be limited to 1 or 2 mappers in the uk, so aftermarket management would be better really.

turbobill

Oh okay then, whats the best management to go for? Dont want to be soending loads as im on a tight budget, cheers bill

studabear

I've only had megasquirt and cossie management, I prefer megasquirt.

If you already have ofac/ofab frst management you could use a ofam ecu from boostmonkeys, its a plug and play megasquirt ecu.

turbobill

Ive not got no management yet, il have to look i to it and see what the prices are, thankyou for your help

Karlos G

iTrader: (4)

www.boostmonkeys.co.uk for management, get one of their latest GEN8 ECU's for around £480.

Karlos G

iTrader: (4)

Hope this clears it up a bit mate.

turbobill

Thanks for your help karlos g, il look on there website thanks again

Karlos G

iTrader: (4)

If you have any problems getting hold of them just let me know, I speak to Rob (Boost Monkeys) all the time.

mk6turbo

Just a note with OFAB...

I've ran it on a blacktop zetec turbo running a saab t25 turbo...

Had to run beige injectors & 195 stage 2 superchip with an adjustable fuel reg to get it to run fairly decent (going off AFR wideband)....

Personally from running ofab, i would recommend something like megasquirt as by the time you have sourced the overpriced ofab stuff, you might as well have bought something newer you can tweak yourself.

Good guide btw

Karlos G

iTrader: (4)

Agreed, would never use any of the old Ford management unless it was already fitted to my car and even then I personally would remove it.

AaronsKa

Would a 1.4mm gasket be okay to use? Don't want any more than 280bhp on a gt25

studabear

Mine uses a 1.5mm cometic gasket.

AaronsKa

Should be okay then, 1.8s are still on back order.

studabear

Sounds like they aint gonna make anymore to me, they have been on back order for over a year, I'm glad I decided not to wait any longer.

AaronsKa

I'll have a go with the 1.4mm then, be happy with anything over a genuine 200bhp to be honest.

Also I've emailed boost monkeys about a gen8 but heard nothing back. Any idea when it will make it into the website?

Karlos G

iTrader: (4)

Pm'd mate.

xr3iturbo

Care to show a screen shot of your maps mate ?

ve and spark


Thanks

Tommy

Karlos G

iTrader: (4)

If it wasn't something I did for a living of course mate, but it's not something I can give away these days.

primedog

Iv got some black top inlet queries......
My engine is silvertop c20let pistons etc. I plan is to wire frst ofab into my car but get OFAM. But was going to put the blacktop inlet on, if possible, as said flows better.... Bringin me to the wiring/sensors/plug issues!
FRST fuel press reg swaps straight in,
vxr injectors go straight in....
But I hav been told the TPS needs changing for frst one which and that's not straight swap.
Also the ISCV is different.... Or plugs different? How is this overcome?
Bearing in mind I'm trying to do management cheap and simple hence frst loom & OFAM....
BUTTTT!!!!
Am I better off buying megasquirt and starting from scratch? What has been tried & tested and works while being simple and cheap??

Desperate for the inlet and management to get cleared up as that's only thing stopping me at the min rest is bolted up n pretty much ready to go!!
Cheers for any help in advance 👍

studabear

Boost monkeys Gen8 ecu, make a new loom.

If it was a cvh with ofab I would go with the ofam, otherwise a new loom is better in my opinion.

Karlos G

iTrader: (4)

Buy a GEN8 from www.boostmonkeys.co.uk and make up a fresh loom (It's only soldering the plugs on and a live and earths), don't use a ropey 25 year old Ford one unless you have to (ie: it's already fitted, but even then I wouldn't use it).
Use all the black top inlet sensors and ICV and then fit any air temp sensor you like (Cossie one for exmaple) to a boost pipe, that's it.

RS-Rikki

I thought the sensor where pretty simple? Lol just starting this conversion :/

RS-Rikki

Anyone got any pics of there builds like this need as much info as possible before I start

Karlos G

iTrader: (4)

They are, you already have an efi loom installed so just need to change a couple of plugs.
Pics on the first page.

rsmark86

iTrader: (3)

dubbs44 machined up a little conversion plate in a few minutes that made his frst tps bolt straight to the blacktop inlet