a1dale Posted February 12, 2011 Share Posted February 12, 2011 ok so got my 2.1 zvh up and running took it for a test drive and it is perfect actually idles better and runs better than cvh bottom end and its got tons of oil pressure compared to cvh it is running a stage 2 hybrid turbo the question i need answering is that is the mfi going to give it enough fuel on boost? i am not after silly bhp numbers i just want it to be reliable i have looked into 5th injectors and wide lamda sensor kits but i really am on a budget and as the engine is running so sweet i do not really want to start tinkering too much if possible it has c20xe pistons and do not want to melt them as it took a lot of machining to get then to fit. Anyone running a zvh on mfi? if so how long and had any troubles? Thanks Quote Link to comment Share on other sites More sharing options...
gingergman Posted February 12, 2011 Share Posted February 12, 2011 id leave it mfi mate, if its running sweet then leave it, efi is where you get more problems, more power can be had, but at a price, and with more power things will go wrong. it depends how fussed and reliable you want it. i stripped a 2.0 zvh non turbo cab mfi and that went fine, in my opinion theres no need to go silly with bhp, id rather it start and drive all the time. but many will disagree lol if your in any doubt then put a bigger fuel pump on it, a cossie one or something that will feed it more fuel. a rolling road will be good for this, in seeing if the normal pump is up to the job, and then they can set it up fully. Quote Link to comment Share on other sites More sharing options...
a1dale Posted February 12, 2011 Author Share Posted February 12, 2011 yes i would like to have it on a rolling road but there is non near where i live (HULL) that i know about. there was one (pioneer) but he no longer has a rolling road. i am fine with the power its putting out now its the pistons i am worried about with not enough fuel Quote Link to comment Share on other sites More sharing options...
Guest Lee81 Posted February 12, 2011 Share Posted February 12, 2011 The Mfi setup should be fine as long as you don't push power much beyond 200bhp. You wont need much boost to acheive this with the 2.1 bottom end. Around 9 psi would probably do it. However although it may appear to be running sweet. When on boost with full throttle theres not way of knowing what going on. Its essential you get it chipped and mapped by someone who knows what there doing. Just changing the turbo to a hybrid will require setting up as the places in the rev range where it boosts will be completely different. Quote Link to comment Share on other sites More sharing options...
a1dale Posted February 12, 2011 Author Share Posted February 12, 2011 (edited) The Mfi setup should be fine as long as you don't push power much beyond 200bhp. You wont need much boost to acheive this with the 2.1 bottom end. Around 9 psi would probably do it. However although it may appear to be running sweet. When on boost with full throttle theres not way of knowing what going on. Its essential you get it chipped and mapped by someone who knows what there doing. Just changing the turbo to a hybrid will require setting up as the places in the rev range where it boosts will be completely different. from what i have been told there is no way of mapping mfi system also the turbo was already on the car when i bought it also got a bigger cooler. previouse owner spent £1000s on it. I think the ecu must be chipped already as it boosts up to 1.5 bar I guess putting it on a rolling road would tell me whats going on but i thought there was no way to adjust anything on the mfi system apart from the mixture? Edited February 12, 2011 by a1dale Quote Link to comment Share on other sites More sharing options...
Guest Lee81 Posted February 13, 2011 Share Posted February 13, 2011 The chip thats fitted to Mfi turbo's is written for different setups. This contains the effective map. Also when your car is being setup on rolling road they will have a emulator ecu that runs alongside the chip. Using this and laptop they can make small adjustments before it gets transfered to the chip within the ecu. Its more complicated than EFI because there are manual adjustsments that need to be made. boost has to be set on bleed valve. fuel pressure can be adjusted with shims in the metering unit. timing needs adjusting manually. They also modify the metering unit to deliver alot more fuel for high power setups. If your boost is set to 1.5bar you have an unlimited boost chip. The chips that are for basic setups have a boost limit of around 16psi which if exceeded cuts the ignition stopping boost going any further. 1.5bar is 21psi boost which is a fair bit. Thats enough on that engine for 300bhp and if you start using that power for sustained periods it will destroy your engine very quickly. Your metering unit will need to be modified to provide the fuel and you definately need a 5th injector also. That is unless you lower the boost. Jamsport know these cars well. I'd give them a call. You might have to travel a fair way but its going to cost you less in the long run. Quote Link to comment Share on other sites More sharing options...
a1dale Posted February 13, 2011 Author Share Posted February 13, 2011 thanks lee that was very helpfull answered a lot of my questions Will give jamsprt a ring tomorrow and see what they suggest Thanks again Quote Link to comment Share on other sites More sharing options...
Guest Bazza_w Posted March 13, 2011 Share Posted March 13, 2011 I ran my cab on basically the same set up, xe pistons, standard head, standard turbo etc at 14psi chewed up alot of gear boxes thou but thats probably the way i drove it Quote Link to comment Share on other sites More sharing options...
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