13 replies to this topic

[Mpi Mark]

Hi folks..Happy New Year!!

I am nearing the end of my mpi project and after having the bodywork all restored on the car my attention is being drawn to the engine.
I have asked few questions on here and read a great deal into vmax scart supercharging etc. I have yet to read much into larger capacity Mpi engines...I appreciate the standard ECU needs junking really in both cases...but has anyone had a big capacity mpi build by Swiftune, MED, specialist components etc. If so does anyone have any opinions vs Supercharging.
Furthermore this may be a dumb question so please forgive me, but would there be problems if I put a built engine such as a specialist components twin cam with different ecu into an mpi regarding MOT etc... I am sure that I have read that tougher emission regulation prevents larger mpi engine builds..aren't the emission tests dictated by the engine age etc ??
Sorry for sounding confused thanks in advance for any opinions / advice...

MPI till I die.

[Steve220]

Large bore? Supercharger?

 

[Steve220]

In seriousness, if you're considering going down the forced induction route, you're going to have to lower the compression rate. So rather than put those bodge plates in, you'll need to look into low compression pistons. Its worth chatting to Stuart at VMAX, he's a friendly chap and i'm sure will happily talk through a potential build.

[Mpi Mark]

[quote name="Steve220" post="3345903" timestamp="1452035206"]Large bore? Supercharger?
 
[/quoteHa Ha because my marriage prohibits it....however I could tell her I am developing deep feelings for the car and shell have to go !!

[Mpi Mark]

In seriousness, if you're considering going down the forced induction route, you're going to have to lower the compression rate. So rather than put those bodge plates in, you'll need to look into low compression pistons. Its worth chatting to Stuart at VMAX, he's a friendly chap and i'm sure will happily talk through a potential build.

Thanks for the reply Steve but if I were looking to spend circa £4000 - £5000 I am thinking standard engine larger pistons and supercharge by the GOD at Vmax or spending a similar amount at say swiftune etc....any advice on best reliability etc?

[Steve220]

If done properly, either will be reliable. However, I think the supercharge route will be more expensive.

[Ethel]

The emission test is based on whichever is older out of the car or engine. If you want to do serious levels of tuning an older engine with an attributable age is handy. The DVLA  were asking for a headed letter from the garage that installed the lump as evidence, if that still applies an MoT testing station ought to be an alternative.

 

Both your options do exactly the same thing in stuffing more air in the combustion chamber. A Supercharger (belt driven?) could be set up to stuff more in, but it won't be as neat and straight forward to install and the engine won't be as fresh as one that's been rebuilt to take overbore pistons.

[Fast Ivan]

 

the GOD at Vmax

LOL

[gadget555]

"The emission test is based on whichever is older out of the car or engine" How can they tell if the engine is older than the car that it's in?

[gazza82]

Don't think they can or do so the car gets applied with the emissions that suit the build date .. unless your MOT guy is "classic-friendly" and understands.

Edited by gazza82, 06 January 2016 - 05:05 PM.

[Fast Ivan]

"The emission test is based on whichever is older out of the car or engine" How can they tell if the engine is older than the car that it's in?

If it were me I would source a doner engine from somewhere that still had access to the v5, this v5 or a copy of it would form the start of my paper trail as it would prove the age of the engine. Then, if I was getting the engine built by someone else, I would ask them to put in writing that they had built if using the doner engine as detailed on the v5. Then, if someone else was fitting the engine for me I would also ask them to put in writing that they have fitted the engine as detailed on the v5 and on the builders letter.

Then take all this to the mot station and cross your fingers that they know the law.

[gadget555]

That's the problem we have to know the law! when we inspect a car that is presented to us for inspection first things we note down are reg, chassis no and mileage, we then go to the computer and login, input the details that we have just written down this then shows us the rest of the details of the car being presented to us for mot inspection and whether it requires an emissions test as this is age related to the car (chassis no tells us this) not the engine or engine no as we don't look for it as sometimes it's inaccessible. The DVLA site also tell us of any previous advisories and if it has been presented to any other garages prior to the one that we are doing, some chancres take it to several mot stations to see if one will be more lenient and pass it. Thing is we have to be very careful when doing inspections as VOSA and trading standards monitor use very closely and it is all to easy to get caught out and then it would be my inspectors vocation revoked and possible loss of job/business. Yes I agree having a nice paper work trail to prove where everything has come from will stand you in good stead when you get stopped by nice Mr policeman and have to explain where all the bits of your pride and joy has come from to stop him impounding it and having to go to court with all your receipts, invoices and other paper work that you may have to prove that it is all the bits that make up your car are in fact yours.   

[Mpi Mark]

That's the problem we have to know the law! when we inspect a car that is presented to us for inspection first things we note down are reg, chassis no and mileage, we then go to the computer and login, input the details that we have just written down this then shows us the rest of the details of the car being presented to us for mot inspection and whether it requires an emissions test as this is age related to the car (chassis no tells us this) not the engine or engine no as we don't look for it as sometimes it's inaccessible. The DVLA site also tell us of any previous advisories and if it has been presented to any other garages prior to the one that we are doing, some chancres take it to several mot stations to see if one will be more lenient and pass it. Thing is we have to be very careful when doing inspections as VOSA and trading standards monitor use very closely and it is all to easy to get caught out and then it would be my inspectors vocation revoked and possible loss of job/business. Yes I agree having a nice paper work trail to prove where everything has come from will stand you in good stead when you get stopped by nice Mr policeman and have to explain where all the bits of your pride and joy has come from to stop him impounding it and having to go to court with all your receipts, invoices and other paper work that you may have to prove that it is all the bits that make up your car are in fact yours.

Flipping eck this looks an absolute nightmare....looks like I'll have to err towards vmax then. I think vmax offers the power without the dilemma if the conversion is carried out on my existing engine. I believe mot's aren't an issue with programmable ecu.

[maccers]

Hello - Stuart at VMAX done both for me, ie made my 1275 Spi block into 1293cc and fitted with suitable pistons and cam for a fuel injection based supercharged engine. Also rebuild the gearbox etc too and replace cylinder head with suitable flowed / bigger valves. Am using Emerald ECU. Works a treat! I am local so it was advantageous for me. Costs were around what you had suggested in your budget.