Mi16 1.9 Alloy Block Torque?

[Tom Fenton 1,542]

Just a bit of a survey really, what torque figures have people managed to get from the alloy block Mi16 engine?

 

The reason I ask is that we have recently had myself and my mates track car mapped, and are interested to compare the torque figure with others.

[Cameron 16]

149.3 lbft for me, but I'm cheating.

[Tom Fenton 1,542]

What spec for that torque, obviously different head etc.

[Dj_mini 7]

My old qep alloy mi was around 160lbft iirc. That was big valved and solid lifters ect.

[DrSarty 90 1 Cars]

Bonzai had 144lbft IIRC. XU9J4 on Jenveys.

[Cameron 16]

That was XU9J4 with RS head and Newman PH2 (266 deg) cams, and my special 'zorst.

[Tom Fenton 1,542]

All interesting stuff. Our car made 177bhp and 145lbft, Phil was a bit disappointed (with the power) as he put a hell of a lot of time and effort into the throttle bodies, but given that the engine is a totally standard alloy Mi16 with 6 years of hard use under its belt, I think its pretty reasonable. The torque figure also seems to be pretty healthy, I guess down to the long induction length and twin staged injectors.

Edited September 21, 2009 by Tom Fenton

[DrSarty 90 1 Cars]

All interesting stuff. Our car made 177bhp and 145lbft, Phil was a bit disappointed (with the power) as he put a hell of a lot of time and effort into the throttle bodies, but given that the engine is a totally standard alloy Mi16 with 6 years of hard use under its belt, I think its pretty reasonable. The torque figure also seems to be pretty healthy, I guess down to the long induction length and twin staged injectors.

 

I think I under quoted Bonzai's figure by 1lb/ft, as 176bhp and 145lb/ft now rings a bell. Car went very well too.

 

What is interesting - and is actually what I expected from a certain point of view now you've told us - is that the staged injectors haven't made a big difference in peak figures. How does this thing drive?

 

All the effort of fitting and mapping in staged injectors could be the cause of Phil's disappointment. But the peak figures don't tell the whole story and perhaps the car is economical and has great throttle response?

 

Maybe if the engine was refreshed with T/C valve seats and new rings it may find a bit more (?). What dia are the ITBs?

 

You do like your cryptic threads don't you Tom?

Edited September 22, 2009 by DrSarty

[James_R 3]

Bonzai's was also running a Maniflow type exhuast job and a 4 inlet pulley 2 exhaust.

[DrSarty 90 1 Cars]

Bonzai's was also running a Maniflow type exhuast job and a 4 inlet pulley 2 exhaust.

 

In which case, if Tom's mate's engine really was std in every other way, then the staged injectors ARE making other differences (?).

 

Naturally this is all subject to the huge variances that we know exist with RRs.

[Tom Fenton 1,542]

Not realy cryptic, just nice to see that the homebrew TB setup and tired stock Mi engine compares pretty well with some other stuff out there, proving that certainly the TB's are working well.

As for the twin injectors, Dave Walker said he could certainly see a difference with the outer ones staged in vs without them, this probably goes some way to explain the decent torque numbers from an otherwise reasonably tired motor.

[DrSarty 90 1 Cars]

Slightly OT, but I'll be going back to Dave with the 2.2 running staged injectors early next year, so we'll be able to compare graphs fairly and see what they bring to the party.

 

I'm guessing throttle response doesn't really show up on a graph, although a slightly higher average torque curve will.

 

My peak power may be better too due to improved fuel atomisation/mixing, and see me back nearer 240bhp (well perhaps 235?).

 

Are you going to tell us any more Tom, such as what the homebrew TB set-up was off? Nice result it seems.

[pee vee 1]

mine is 140 lb ft and 179 bhp

 

standard alloy mi16 engine on jenveys and K3.

standard length longman inlet, and 90mm trumpets.

 

has made within 3 or 4 lb ft of that on 2 RRs.

 

 

Ive heard very good things about a sandy brown inlet manifold on jenveys though. a + 20 lb ft gain!?? ! IIRC

Edited September 22, 2009 by pee vee

[pee vee 1]

All interesting stuff. Our car made 177bhp and 145lbft, Phil was a bit disappointed (with the power) as he put a hell of a lot of time and effort into the throttle bodies, but given that the engine is a totally standard alloy Mi16 with 6 years of hard use under its belt, I think its pretty reasonable. The torque figure also seems to be pretty healthy, I guess down to the long induction length and twin staged injectors.

 

 

In my opinion, i think 177 and 145 is a very realistic figure from the mods you have done.

almost exactly the same figures as mine. with exactly the same mods. lol

 

as said above, i have read good things about the long inlets and is somethin i want to try.

[Anthony 1,003]

Mi that I built for Kate a while back was something like 196hp and 145lbft (on Emerald rolling road)

 

Standard 1.9 Mi except for Catcam inlet cam (526?), Puma throttle bodies, Emerald ECU, Maniflow 4-2-1 exhaust manifold.