coozer
|
 posted on 19/4/12 at 01:57 PM |
|
|
Zetec Turbo Advise Please?
Should have done this years ago instead of spending £1k on injection to get an extra 12bhp..
Well, I've seen the light and am going down the zetec turbo route.
No half measures mind you, although I will be diying as much as possible.
Currently I have another ST170 engine, tubular exhaust manifold and big GT3076 turbo, all new and very cheap from the good old US of A.
Manifold needs some adjustment to position the turbo in the right spot and the other way round to in the picture, and, also, an external wastegate.
I'm well into a big inlet manifold using the engine side of the ST bit and a fabbed up plenum using the ST throttle body.
Got my eye on a RS500 intercooler which will live up front with the rad.
So, I need some advise on the motor. I want low comp forged pistons and some strong rods. Target compression ratio would be 8.0~1 but I read about
(mainly on American websites) the fact that the ST170 (or ZV3 as they call it) can only have a 9.0~1 ratio.
Is the St bottom end the same as the backtop I know the pistons and rods are different but are the block dimensions the same? I can only assume the
chamber shape in the head is different, but again, seeing as the compression ratio is only 0.1 different I'm a bit puzzled.
Target is 350bhp, although its the torque figure I'm more interested in.
Any turbo experts or builders who can shed some light here?
Ta,
Steve
1972 V8 Jago
1980 Z750
|
|
|
|
|
scutter
|
| posted on 19/4/12 at 02:10 PM |
|
|
Sorry I can't answer any of your questions, but as a ST170 powered Locost owner, That's just filth
I'll be reading with interest, as I've the making of the same idea here.
ATB Dan.
The less I worked, the more i liked it.
|
|
|
beaver34
|
| posted on 19/4/12 at 02:27 PM |
|
|
ive just turboed a 1600 zetec, space is an issue as i have found out!
intercooler on my car no way will you get a rs500 cooler in the front, the gt30 also is a big turbo for 350 bhp and that manifold only looks like its
quite thin walled too
i cansend you some pics of how ive gone around stuff if you like might help
|
|
|
coozer
|
| posted on 19/4/12 at 03:20 PM |
|
|
And I quite fancy these...
1972 V8 Jago
1980 Z750
|
|
|
dlatch
|
| posted on 19/4/12 at 04:42 PM |
|
|
quite a few of the fwd boys on passion ford really pushing mega power from these turbo zetec's now 
specs and parts used vary hugely though.
|
|
|
BaileyPerformance
|
| posted on 19/4/12 at 10:07 PM |
|
|
Hi,
Keep the compression high, we use 9.5/1 upto 300BHP ish
Low compression will make the engine laggy with poor MPG
What engine management are you using? we use megasquirt 2
Let me know if your require more info, we have done several zetec turbos
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
BaileyPerformance
|
| posted on 19/4/12 at 10:10 PM |
|
|
.....i'd also use a blacktop, not an ST170, you do not want the VVT, ST170 engine make good money, you could by a blacktop and have change.
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
coozer
|
| posted on 20/4/12 at 10:21 AM |
|
|
Thanks, I got the ST for blacktop money but is the bottom end the same?
I've looked into some JE piston with Eagle rods that bring the compo down to 9-1
I have an Omex 600 installed for the changeover.
I was hoping to lock the inlet cam and use the head as its got nice big ports and bigger valves. Is this OK?
Steve
1972 V8 Jago
1980 Z750
|
|
|
djtom
|
| posted on 20/4/12 at 01:03 PM |
|
|
Please don't tell me that you were the one who outbid me by £2 and won that ST170 lump for £202 on ebay a couple of weeks ago - I'm still
bitter about that!
8.0:1 CR should be fine - yes you'll gain a bit of off-boost response by raising the CR but I'm running 8.0:1 at the moment and response
is just fine - it's actually quite nice as off-boost it'll happily pootle around town in traffic without feeling like its straining at the
leash all the time. Get the revs over 3500 however, and all hell breaks loose. It also gives you a bit more leeway when mapping as it'll allow
more ignition timing as it will have a higher det threshold than at a higher CR.
Tom
|
|
|
whitestu
|
| posted on 20/4/12 at 04:44 PM |
|
|
Normal Zetec, then st170 then injection then turbo!
Some people are never happy!
|
|
|
Volvorsport
|
| posted on 20/4/12 at 05:13 PM |
|
|
a chap i know whos building an NA 5 cylinder was building a turboed St170 before that , its not too hard to operate the VVT or leave it disconnected
and itll use its home position .
8:1 CR is a bit low for street use - 9:1 is more useable , but in a light car i dont think it would matter
www.dbsmotorsport.co.uk
getting dirty under a bus
|
|
|
coozer
|
| posted on 20/4/12 at 05:39 PM |
|
|
quote:
Originally posted by djtom
Please don't tell me that you were the one who outbid me by £2 and won that ST170 lump for £202 on ebay a couple of weeks ago - I'm still
bitter about that!
Tom
No Tom. I got it out of a scrap yard. I had a choice of blacktops, duratecs or that St for the same price!
1972 V8 Jago
1980 Z750
|
|
|
neilp1
|
| posted on 21/4/12 at 08:10 AM |
|
|
quote:
Originally posted by coozer
quote:
Originally posted by djtom
Please don't tell me that you were the one who outbid me by £2 and won that ST170 lump for £202 on ebay a couple of weeks ago - I'm still
bitter about that!
Tom
No Tom. I got it out of a scrap yard. I had a choice of blacktops, duratecs or that St for the same price!
What scrap yard was that Steve? anywhere local?
|
|
|
coozer
|
| posted on 21/4/12 at 10:01 AM |
|
|
Andys Auto's down the Boro. He's an old skool ford fan and has some interesting old cars in there...
Want anything? We can have a look down again if you want.
Steve
1972 V8 Jago
1980 Z750
|
|
|
neilp1
|
| posted on 22/4/12 at 08:07 AM |
|
|
quote:
Originally posted by coozer
Andys Auto's down the Boro. He's an old skool ford fan and has some interesting old cars in there...
Want anything? We can have a look down again if you want.
Steve
I'm not after anything at the moment, but good to know someone local!!
|
|
|
