1.6 lost horses ?

No, nothing to do with the Grand National - though its a sad fact the way their fences are setup does cause a regular loss of horses.

I'm new to Fs and TF's and the K series engine but from my time with classic Ford's know there is very little difference in bhp for small variations in engine capacity. A 1.6 pinto engine in cooking trim only delivers 73bhp but in S spec rises to a more acceptable 92bhp. The only difference being it has the same cam and carb as the 2.0. The standard 2.0 only puts out 99 to 100bhp so very little difference for those 400ccs.

So why is there a 20bhp difference between the 1.6 115 and the 1.8 135 ? I've read the cam profiles are the same as the 135, so is the head and I think the injection system and ECU. That should give a maximum difference of 5bhp between the 2 capacities.

Where is the power being lost, what parts are different between the two that could be changed to recover some of the lost power ?

I don't want to get into making performance improvements, just releasing the potential that is being held back.

They needed a detuned engine for the CVT models as like most CVT transmissions they are limited by the amount of torque they can handle, they probably wouldn’t have bothered on another version for the manual transmission cars
And it would create a point of difference between the poverty pack version and the more expensive models

Tracking down a list of parts that are different between the 2 isnt as easy as I expected. Wondering if tjey use different throttle bodies

Notanumber wrote:

Tracking down a list of parts that are different between the 2 isnt as easy as I expected. Wondering if tjey use different throttle bodies

You might want to explore pages of this site: http://www.dvapower.com/

Thats a great site, lots about after market upgrades but nothing about the parts that separate the 1.6 and 1.8 mpi. As the 115 already has the same head and cams as the 135 the restrictive factor must be elsewhere- the challenge in finding where that is. As I understand it there is something around a 15bhp improvement to be made just by swapping out one or two restrictive parts for bog standard 135 parts.

Any thoughts on inlet manifold (my 115 appears to have a plastic one) & throttle body sizes

I noticed a VVC engine on eBay for £100, you could spend in excess of that in upgrades & still be asking questions. In your position I would be thinking of ways to get it home & housed without the other, & gimlet eyed, member of the household asking searching questions.

Oh & thanks to Roverlike for the link to the DVA site. I was vaguely aware of it but now it'll keep me up at night. There's a lot of it !

Notanumber wrote:

.........So why is there a 20bhp difference between the 1.6 115 and the 1.8 135 ? I've read the cam profiles are the same as the 135........

I believe the cams are different between the 1.8 135 and the 1.6 115. I think the 115 has the same cams as the 1.8 120.

Thats what i assumed initially and would have made a nice straightforward upgrade.
Reading further the early 1.6 when it was the 110 had the same milder cams as the Stepspeed 1.8 120. But once the 1.6 was renamed as the 115 it gained the same standard cams as the 135. I guess it probably made sense at the time because of economies of scale standardising on the same cams for all manual mpi cars. .

As it also has the same metal bodied (48mm) throttle body Im now thinking the differences may be the injector size and/ or ECU profile ?

I think all MEMS 3 cars use the same blue injectors.

https://rimmerbros.com/Item--i-GRID018825 lists all the different cam shafts used.

But I might be wrong about injectors - https://rimmerbros.com/Item--i-GRID018860