ST170 engines, whats best? Pros & Cons
#1
15000
Thread Starter
Join Date: Apr 2011
Location: no where
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
ST170 engines, whats best? Pros & Cons
Hi all
I am thinking of fitting St 170 engine to my lotus 7 I have seen a few on e-bay they seem all have covered 60-80k miles
1) Should I be worried as long as I change the timing belt?
2) Is the black top better than silver top?
Your response will be greatly appreciated
Regards axle
I am thinking of fitting St 170 engine to my lotus 7 I have seen a few on e-bay they seem all have covered 60-80k miles
1) Should I be worried as long as I change the timing belt?
2) Is the black top better than silver top?
Your response will be greatly appreciated
Regards axle
Last edited by axle; 23-10-2017 at 08:43 PM.
#2
PassionFord Post Whore!!
ST170 is just that, block is very similar to a Blacktop and you can fit a Blacktop head onto a ST170 block.
Silvertop is the earlier variant of Zetec engines.
60-80k is nothing if the engine has been serviced and maintained.
Silvertop is the earlier variant of Zetec engines.
60-80k is nothing if the engine has been serviced and maintained.
#4
PassionFord Post Whore!!
iTrader: (1)
The 2.0 Duratec might be a good option too. It can be found in plenty of Fords from the noughties and is all alloy, so lighter than the ST170 engine. Only 145PS as standard but there seems to be countless tuning options available. Caterham use a lot of Duratecs in the current Seven I believe so, if it's good enough for them, it might do what you need!
#6
Skint
Hi all
I am thinking of fitting St 170 engine to my lotus 7 I have seen a few on e-bay they seem all have covered 60-80k miles
1) Should I be worried as long as I change the timing belt?
2) Is the black top better than silver top?
Your response will be greatly appreciated
Regards axle
I am thinking of fitting St 170 engine to my lotus 7 I have seen a few on e-bay they seem all have covered 60-80k miles
1) Should I be worried as long as I change the timing belt?
2) Is the black top better than silver top?
Your response will be greatly appreciated
Regards axle
what gearbox are you planning on using?
#7
15000
Thread Starter
Join Date: Apr 2011
Location: no where
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Hi all
Thanks for all your replies the gearbox I have is MT75 I am still to find out if this will mate up OK to ST 170, so please let me know if you know?
2ndly why would the Duratec a better option I know it is lighter but than you have not got as much BHP, again I would value your opinion in this matter.
Thanks Again Axle
Thanks for all your replies the gearbox I have is MT75 I am still to find out if this will mate up OK to ST 170, so please let me know if you know?
2ndly why would the Duratec a better option I know it is lighter but than you have not got as much BHP, again I would value your opinion in this matter.
Thanks Again Axle
Trending Topics
#8
Skint
as far as i'm aware, there are two different bellhousing patterns for the MT75. One of them fits the zetec pattern but you have to leave a couple of the studs out.
the reason for suggesting the duratec engine was originally down to the weight advantage. They do have a lower standard power rating, but 200bhp is achievable without too many modifications. Parts are also alot cheaper to buy second hand.
the reason for suggesting the duratec engine was originally down to the weight advantage. They do have a lower standard power rating, but 200bhp is achievable without too many modifications. Parts are also alot cheaper to buy second hand.
#9
PassionFord Post Whore!!
iTrader: (1)
Weight is a big advantage for the Duratec. If it's 30kg lighter, that's a big percentage in engine terms and a good weight saving in a car as light as a Seven. The question you have to ask yourself is, in a car as basic as yours, where else are you going to remove 30kg from one component? As Colin Chapman said, adding power makes you faster on the straights. Subtracting weight makes you faster everywhere.
Tuning options are big for the Duratec too. There is piles of stuff out there for it as it's used so widely. Mountune did a kit for the Fiesta ST (which used a 2.0 Duratec) that took it from 150PS to 165PS. Think that was just an exhaust, intake and remap. Keep in mind that most ST170 are usually in the low 160s in terms of horsepower and it suddenly becomes very close. Don't get me wrong, the Zetec is a good engine, especially in ST170 form, but it's a bit old-hat nowadays.
It does partly depend on gearbox compatibility though, as I am not sure on how the bolt patterns compare. That being said, loads of people run RWD Duratecs, so it must be possible!
Tuning options are big for the Duratec too. There is piles of stuff out there for it as it's used so widely. Mountune did a kit for the Fiesta ST (which used a 2.0 Duratec) that took it from 150PS to 165PS. Think that was just an exhaust, intake and remap. Keep in mind that most ST170 are usually in the low 160s in terms of horsepower and it suddenly becomes very close. Don't get me wrong, the Zetec is a good engine, especially in ST170 form, but it's a bit old-hat nowadays.
It does partly depend on gearbox compatibility though, as I am not sure on how the bolt patterns compare. That being said, loads of people run RWD Duratecs, so it must be possible!
#10
Erect Member
Its a lump of pig iron, hardly worthy of a real Lotus 7. I binned the Pinto out of my old Westfield and replaced it with an allow blocked Poxhaul 2.2. The difference to handling and steering was night and day. If you must do it go for a true 2.0 Duratec.
#11
15000
Thread Starter
Join Date: Apr 2011
Location: no where
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Hi all
Thanks for your feed back it will help me to make the right decision.
Yes you are right about the weight and the car handling particularly in a 7 and Colin Chapman's principle of weight on a car.
However one thing I need to tell everyone here is I am not using this car on the track and I am on a budget, I do not suppose the tuning kit for the Duratec can be cheap?
So what you all clever guys think?
cheers Axle
Thanks for your feed back it will help me to make the right decision.
Yes you are right about the weight and the car handling particularly in a 7 and Colin Chapman's principle of weight on a car.
However one thing I need to tell everyone here is I am not using this car on the track and I am on a budget, I do not suppose the tuning kit for the Duratec can be cheap?
So what you all clever guys think?
cheers Axle
#12
I've found that life I needed.. It's HERE!!
Unless the Mt75 is a Mitchell and Cots mt75 as per a Morgan it’s most likely to be the integral bell housing 2wd cable clutched 4 pot variety as fitted to the Sierra and Granada ?
This means your stuck with a Zetec/ ST170 or older unless you want to upgrade the drive train.
The ST170 will bolt up no problem. It is old hat but it is rugged and reliable if maintained.
A Duratec can be fitted on a budget but will need the same things as the St to get it to 200bhp
This means your stuck with a Zetec/ ST170 or older unless you want to upgrade the drive train.
The ST170 will bolt up no problem. It is old hat but it is rugged and reliable if maintained.
A Duratec can be fitted on a budget but will need the same things as the St to get it to 200bhp
#13
15000
Thread Starter
Join Date: Apr 2011
Location: no where
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for your response
Please let me know If I got this right, if my MT75 box is from a Sierra than i have only the choice of ST170 OR Zetec?
Does anyone know the weights of St170 & Duratec?
Cheers Axle:
Please let me know If I got this right, if my MT75 box is from a Sierra than i have only the choice of ST170 OR Zetec?
Does anyone know the weights of St170 & Duratec?
Cheers Axle:
Last edited by axle; 24-10-2017 at 05:28 PM.
#14
I've found that life I needed.. It's HERE!!
If Its a standard ford box you have the choice of any of the traditional four pots.
After the Zetec they are Mazda bassed.
What are you upgrading from ?
After the Zetec they are Mazda bassed.
What are you upgrading from ?
#16
I've found that life I needed.. It's HERE!!
Unless you're upgrading the whole drive train then it's between the zetec and the st.
I am guessing this is a robin hood ? So the 30kg isn't the be all and end all.
The above engines can be done on the cheap through to 're mortgage monies.
Another option could be a 16v doh with the Rs2000 or even the 2.3 from the galaxy / scorpio.
I am guessing this is a robin hood ? So the 30kg isn't the be all and end all.
The above engines can be done on the cheap through to 're mortgage monies.
Another option could be a 16v doh with the Rs2000 or even the 2.3 from the galaxy / scorpio.
#17
15000
Thread Starter
Join Date: Apr 2011
Location: no where
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
thanks 1,000,000,000
Regards Axle