High Compression EFI Turbo Daily
Turbo Mini Forums

Since finishing my 998 turbo build i've been eyeing up fuel injection as the next challenge. Also, I've taken that off the road for now (to be used next year for hill climbing) and started driving my 1275 N/A. I've finished uni and have a job at Dyson and s since I will now be driving the mini every day it made sense to go back to having a radio, sound-deadening material and seats that don't take 2 minutes to get in and out of.

However, i do miss the turbo. So the plan is to turbo and fuel inject my 1275 N/A. The target is to try running 4-6 psi boost on the existing setup... kent 266 cam and approx 10.3:1 compression (and otherwise a standard engine). I'm thinking this will give about 90-110 bhp at around 6000 rpm. I'm looking at getting a GT15 or an IHI RHF3 for the turbo to hopefully provide full boost by 2000 - 3000 rpm and give very little lag. The aim is for a very efficient and responsive daily drive. I'll leave the hunt for maximum power to my 998 hill climb.


The main reason for using the engine as it stands is for a few reasons:
a) I don't have deep pockets
b) the 266 is a suitable cam and i fancy trying a higher compression to give a nice daily drive
c) the guides in the head are worn and it's a bit out of balance by the sounds of it, so if things go tits up i won't be too miffed because it needs a good strip and clean anyway.


I've spoken to Paul S about some features so far mainly choice of inlet and injector design and using the MS3X. Just wanted to start a thread to get some other feedback and suggestions.

So the general plan is to fabricate the manifolds on a spare engine and try getting the efi working before adding the turbo.


Dan

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo

My personal view would be stick with the MS2 initially (don't you already have one ???).

The MS3 / MS3X is a fair bit more expensive (noting your comment (a)) and the MS2 siamese code is probably easier to understand for a first time go at 5 port sequential injection (waits for Paul to shoot me down in flames !!!)

In either case, you have to factor in the cost of the dual widebands if you want to do it right, which gets even more complicated on a turbo setup.

Schrödinger's cat - so which one am I ???

Having setup and used both, I find the MS3 far easier. Just a standard sequential setup.

And for some the electronics is just too complicated. A fully built MS3/3X is as close to plug and play on the 5 Port as you can get.

I will still use the MS2 on two of our cars, because we have them.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

http://www.jbperf.com/

I am very interested in this kind of build especially given the still high expectation on power output.

But, I wouldn't build one without a polished chamber, IC and maybe water injection to stay on the safe side.

10.3 CR even with a 266 to lower dynamic compression seems high to me ...

Rusty by nature

Certainly would need an efficient intercooler in good air flow.

Having said that, i'm aiming for 21psi on 9:1.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

if it dets, just drop the boost a bit :)

I've run 15psi on a wet manifold 9.3:1 no issues.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Sorry chaps. Just have an ms1 I'm afraid. And the board is only built up for ignition. No bits for injection.

I'm going to check what the compression was on the first iteration of my 998 turbo. A while back I worked it put as 10:1. So jut want to check that. Cos I was running 8psi intercooled in that no probs.

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo

As long as you realise that the MS3/3X is an MS1 but with a couple of add-on boards and larger case.

As long as the MS1 has all the sensor inputs, then that can be upgraded to MS3/3X.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Currently I've been swapping the ecu between my two cars and loading different profiles to achieve the settings.

I could upgrade my ecu but it would be nice to have one in each car, especially if I come to sell one them. Also despite being capable id prefer not to build up an ecu.

I'm hoping that the only big costs of the mod will be ecu and lambda sensors. Plus a bit for manifolds which I'll fabricate. Ive won a turbo of eBay for £5 which im hoping is a gt1549 I'm picking it up on tues so I'll find out.

Thanks for input guys

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo

When i first read this post title i thought it was going to be about the iveco turbo daily. hahaha. Wasnt someone using a turbo off one of those?

I'm planning something similar for my 998, initially starting off with the ms to control the ignition and then hopefully the injection. I think I'm going to go straight for the ms3 rather than ms2 as well - hopefully this will be ordered this week. What are you planning for the inlet and exhaust manifolds? Are you going to side mount the turbo? I also have a gt1549, I'm not sure if this will be too big for the 998, but should be a straight swap for the 1444 anyway if spool up is too slow.
Hope you don't mind a newbies input!

like the facebook page for diyautotune and get their 10% off code if you order by Sunday. unfortunately i don't have the money to order it now :(

I'm hoping to make the manifold and mount the turbo behind the block but without a bulkhead box. Inlet will be based on info from Paul S.

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo