Originally Posted by goltho (Post 2824355)

I fitted a box with switch to my CDTi just before I accidentally bought the ZT :D so have only done 30 minutes' testing. I'm seriously impressed though, particularly as it works on top of the 160 remap I had done a couple of years ago. I've read several anecdotal reports of damage to fuel pumps due to the increased fuel pressure which the box uses but have not read any "documented" reports which would provide evidence for this. So my question is:-

• Have you or someone you actually know of, experienced fuel pump problems (e.g. leaking seals) as a result of using a Synergy box

These have been popular add-ons over the years so a survey of owners' experiences with them will be useful. Please keep replies to actual experiences - positive or negative - rather than explanations or opinions. Thanks.

Dougie.

Originally Posted by trikey (Post 2824431)

I have had to replace high pressure pump seals on a couple of cars that have had the synergy (Or similar) Box fitted.

Originally Posted by Arctic (Post 2824430)

Have good read of the link below, it may give you the answer you are searching for.

Originally Posted by goltho (Post 2824433)

Thanks for that. In terms of an impartial investigation, these previous discussions don't bring anything properly evidential to the party although they are interesting. It's clear that there are two camps mostly inhabited by the suppliers of the synergy box and the so-called 160 remap, and their followers. That's created a reluctance by one side to become involved (or embroiled as they have said) in adult discussions, and an almost pack-like approach aiming negativity against the other side as well as providing unquestioning support for their supplier(s). All that's brought about is entrenchment which is a pity but not uncommon.

It wasn't my purpose to look at 160 remaps as I've not seen any anecdotal evidence of damage to cars. Interestingly though, it's become clear that there is considerable doubt whether the so-called 160 map provides anything like 160bhp. There's no doubt there is some improvement but no evidence I can find to corroborate the 160 claim. Conversely, there seems to be some which negates it (technical performance limits for one). I can't find any reference to anyone having the remap checked afterwards to ascertain how much power increase their car actually had (I certainly didn't). But that's not the question here, which is about finding or challenging hard evidence of the Synergy box indirectly causing damage to the high pressure fuel pump by overstressing seals.

This excellent summary by 75Connie is well-thought through and in my view, a good and impartial summary of his investigations which ask the same questions as I'm asking.

There's a lot of coverage of the synergy -v- fuel pump assertions but I'm seeing very little informed comment; mostly personality bias which is understandable but also irrelevant.

Dougie.

Originally Posted by Coups (Post 2824550)

I for one have also wondered about this. I can offer no evidence other than to say I had a tuning box on my 75 before the remap. I found the tuning box to give more of a 'push' up the rear when accelerating hard but the remap I found to be smoother in its power delivery. Outright performance between the two was very similar.

Following the remap I never refitted the tuning box and sold it on as the common consensus was that you couldn't use the two at the same time. I have used tuning boxes on other cars for years and haven't ever had any failure (now I've said that.....). I acquired a box recently which didn't have the correct connectors for the car to which it was intended. It did however have the connectors which would fit the Rover. So, I know you can't use both but a quick try? What harm could it do?

In all honesty the Rover is far quicker in acceleration than it was with just the remap. Not sure how that can be since the remap was the supposed max available? Maybe my remap has fallen off somehow? The car is serviced regularly and has no issues. It puts out no black smoke with the box plugged in or not.

Wether the box stays or goes I'm undecided. I tried it as an experiment and was surprised at the increase.

I have also read many anecdotal suggestions of such a box causing the HP pump to fail but would question how much a failed HP pump could be attributable to a tuning box. As I say, I've used them for years, as have friends, and I can't say I've heard directly of a failure. Maybe tuning box quality varies or the way they're used by the driver causes the failure?

An interesting conversation.

Sent from my SM-G935F using Tapatalk

Originally Posted by Coups (Post 2824550)

In all honesty the Rover is far quicker in acceleration than it was with just the remap. Not sure how that can be since the remap was the supposed max available?

Originally Posted by Mr bountyfull (Post 2824601)

I ran a Synergy 2a box on top of a Superchips 150bhp map and I ran a RR before and after with a few more BHP but nearly 50Lb/Ft added. I ran this for some 80000 miles with no issue.