ceebmoj
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| posted on 22/1/14 at 08:09 PM |
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On the subject of nice rocker covers for the Duratec, I found this the other day on this
nice build thread
 
Description
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edthedrummer
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| posted on 22/1/14 at 08:12 PM |
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Do all fiesta ST heads feature the high ports?
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Mr C
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| posted on 25/1/14 at 10:29 AM |
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quote:
Originally posted by edthedrummer
Do all fiesta ST heads feature the high ports?
Little bit of info here SBD with the serial numbers to look out for. My understanding is
that all ST150's have hi ports though they may be available from other models.
I'm currently putting together a Duratec and opted for the raceline sump (£500) nice piece of kit though the dipstick tube is extra. The ST150
comes with a mechanical thermostat, I opted to replace it with the SBD supplied one as it has one less inlet so cuts down on pipework etc.
I'd recommend Newman Cams as well, great price and service.
I spoke to a number of specialists including raceline and TTS they do not support the use of ARP bolts (either mains or Head studs for this engine as
the clamping pressure is too great for the alloy block and the studs don't allow even metal expansion due to their different properties. this
has resulted in a distorted block on at least one occasion.
Decided to save my money on ITB's and bought a Caterham plenum with a 70mm throttle body instead though I ended up buying a supercharger for
it.
I think its been said here really, most articles and forums suggest that if you are looking for value for money horsepower, bolt throttle bodies and
an aftermarket ecu, along with stage 2 or so cams, just be careful of the amount of lift and valve to piston clearance. Doing that you should get a
good 200bhp all day. I just got a bit carried away 
All the above imo, all the best with the conversion.
[Edited on 25/1/14 by Mr C]
[Edited on 25/1/14 by Mr C]
[Edited on 25/1/14 by Mr C]
Girl walks into a bar and asks for a double entendre, so the barman gave her one
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edthedrummer
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| posted on 25/1/14 at 11:06 AM |
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quote:
Originally posted by Mr C
quote:
Originally posted by edthedrummer
Do all fiesta ST heads feature the high ports?
Little bit of info here SBD with the serial numbers to look out for. My understanding is
that all ST150's have hi ports though they may be available from other models.
I'm currently putting together a Duratec and opted for the raceline sump (£500) nice piece of kit though the dipstick tube is extra. The ST150
comes with a mechanical thermostat, I opted to replace it with the SBD supplied one as it has one less inlet so cuts down on pipework etc.
I'd recommend Newman Cams as well, great price and service.
I spoke to a number of specialists including raceline and TTS they do not support the use of ARP bolts (either mains or Head studs for this engine as
the clamping pressure is too great for the alloy block and the studs don't allow even metal expansion due to their different properties. this
has resulted in a distorted block on at least one occasion.
Decided to save my money on ITB's and bought a Caterham plenum with a 70mm throttle body instead though I ended up buying a supercharger for
it.
I think its been said here really, most articles and forums suggest that if you are looking for value for money horsepower, bolt throttle bodies and
an aftermarket ecu, along with stage 2 or so cams, just be careful of the amount of lift and valve to piston clearance. Doing that you should get a
good 200bhp all day. I just got a bit carried away
All the above imo, all the best with the conversion.
[Edited on 25/1/14 by Mr C]
[Edited on 25/1/14 by Mr C]
[Edited on 25/1/14 by Mr C]
That's what I wanted to hear! So hopefully all fiesta ST's had the high port head!!
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ali f27
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| posted on 25/1/14 at 12:03 PM |
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Hi a very well known and trusted engine tuner tells me he has not got any more power out of the high port head he has done a lot of work on them he
says that some more power can be had from the exhaust side bot will need to weld some more meat into it to machine them better this is still on going
on.
He did all the maching on our race 2.3 and it is a engine with many wins.
All i am saying is dont spend a lot of money on a high port head
Cheers ALI
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Mr C
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| posted on 25/1/14 at 03:33 PM |
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My understanding is the hi port head is a better starting point especially if you don't want to do any machining etc, ultimately with machining
and modding similar power can be had from a lo port head, just a bit more hassle and money.
Girl walks into a bar and asks for a double entendre, so the barman gave her one
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peter030371
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| posted on 25/1/14 at 04:03 PM |
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quote:
Originally posted by Mr C
My understanding is the hi port head is a better starting point especially if you don't want to do any machining etc, ultimately
Tha'ts basically what I had read too. As I am doing nothing other then GSXR TB and decent exhaust then the hi-port gives me more potential
without having to touch the head
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