[engine_work] Mi45 - M45 S/C on an Mi16 engine

[allanallen 528 2 Cars]

1 hour ago, stef205 said:

Sell out

At least I’ll use mine.....

[allanallen 528 2 Cars]

So this is pretty much done! Here’s a pic of the bodies all fitted up, looks a lot tidier now but I’m useless at remembering to take pictures 

 

https://flic.kr/p/JiCQxD

 

[allanallen 528 2 Cars]

Tuesday night I dropped the car off at mikeanics to be mapped, I collected yesterday and I’m very pleased with the results! 

Ive only driven it a few miles but it feels very good, the typical mi characteristics I remember but better!

Idles smoothly at 850rpm, Revs up very cleanly from Tickover and pulls extremely well, just a shame it’s lost some 70bhp and 50lb from the last time it was on the rollers  

 

just a recap of the engine to go with the graphs...

 

standard mi16 with cam timing set to 1.3mm lift @tdc inlet, 1mm exhaust

 

45mm bodies,gti6 injectors and  380mm inlet length

 

trusty old dta e48

 

re-angled standard ex manifold

2.5” downpipe and 2” twin box system

 

 

 

[allanallen 528 2 Cars]

I’m sure it could be improved on when comparing it to others results with similar spec, I’d have loved to have had a variety of trumpets to try and a faff with the cam timing but I simply didn’t want to spend any more money on it. I’m happy and I shall enjoy it for what it is  

 

just need to re-access the air filter as it’s a bit close to the trumpets and possibly change the gearbox from the 1900 that’s fitted to an s16 box I have. 

 

 

 

 

[Anthony 1,003]

Good work. Fill the Derbyshire hills with glorious trumpet quartet 

 

I'd certainly swap the box though if you've got something shorter to hand - should make it feel more lively and eager.

[allanallen 528 2 Cars]

14 hours ago, Anthony said:

Good work. Fill the Derbyshire hills with glorious trumpet quartet 

 

I'd certainly swap the box though if you've got something shorter to hand - should make it feel more lively and eager.

Cheers  

 

box swap is on the cards ASAP I think, after driving it again the gearing is definitely spoiling it!

[jackherer 543]

On 6/7/2018 at 8:20 AM, allanallen said:

I’m sure it could be improved on when comparing it to others results with similar spec

Maybe a bit but it looks good to me! You're only about 10bhp down on mine which is pretty much identical except for a 4-2-1 exhaust manifold which I do think makes a difference.

 

Swapping trumpets mainly seemed to fill in troughs in the graph when we found the right ones, we actually sacrificed a tiny bit of peak power for more area under the graph.

[Tom Fenton 1,542]

Numbers very similar to what my old Mi made in the MOP, 177 and 145 from memory.