35 replies to this topic

[KernowCooper]

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

Edited by KernowCooper, 13 March 2015 - 11:53 PM.

[Turbo Phil]

If it's one of the last MG Metro engines it will have an unleaded head with a smaller (33.3mm) inlet valve, the earlier, leaded head had the larger (35.6mm) inlet fitted. If the head is leaded it will be well worth checking that the exhaust valve seats aren't heavily worn/recessed. Even if the seats are ok, if your budget allows it would be worth having hardened seats fitted to allow you to run unleaded.
If the head is the unleaded version it would be worth having the larger (35.6mm) inlet valve fitted. Along with some further work to the head to improve flow.
If the stock camshaft is in good condition I would retain it. Fit the HIF44 on a decent alloy inlet, RC40 and medium bore LCB and the engine rebuilt as necessary will see a nice "sporty" road motor.
There's certainly no need to be spending 1k on a cylinder head, or going to 1.5 ratio rockers for every last ounce of HP.

Phil.

[Mrpeanut]

If it's one of the last MG Metro engines it will have an unleaded head with a smaller (33.3mm) inlet valve, the earlier, leaded head had the larger (35.6mm) inlet fitted. If the head is leaded it will be well worth checking that the exhaust valve seats aren't heavily worn/recessed. Even if the seats are ok, if your budget allows it would be worth having hardened seats fitted to allow you to run unleaded.
If the head is the unleaded version it would be worth having the larger (35.6mm) inlet valve fitted. Along with some further work to the head to improve flow.
If the stock camshaft is in good condition I would retain it. Fit the HIF44 on a decent alloy inlet, RC40 and medium bore LCB and the engine rebuilt as necessary will see a nice "sporty" road motor.
There's certainly no need to be spending 1k on a cylinder head, or going to 1.5 ratio rockers for every last ounce of HP.

Phil.

Sounds very sensible. Phil, what would be a reasonable budget for increasing the size of the inlet valves and a bit of work to help the head flow better?

[paulusmaximus]

Thanks phil ..is there any way of telling what year the engine is ...it will be going to a specialist for the engine rebuild but im interested to learn a bit more about it and what my options are cheers ..paul

[Dusky]

Not sure of budget at the minute ..It would just be used as fast road but wanted to see what my options were whilst the engine was out of the car . what would a full stage 1 involve and what sort of power increase would it achieve ?  i was told these engines already had a good cam or would it be worth changing ?  thanks 

It's a classic Mini, so you must mean 'not quite so slow road'  .
Fast it's never going to be.

But it feels twice as fast as other cars I can amaze people of nu age when I say 'we re only doing 50 now'

[fwdracer]

If there is an engine number available (12H) put it up on here and it should be able to work out year etc.

[fwdracer]

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

 High lift rockers are seriously misunderstood. They provide more lift for any given position on cam profile. The MG Metro cam is a short duration road cam, good for torque and the extra lift will help the breathing on an unported head aiding torque further, they don't change cam duration and turn the car into a top-end only screamer. For the investment (£150 etc) they represent far better lbft/£ than a modified head....

[paulusmaximus]

If there is an engine number available (12H) put it up on here and it should be able to work out year etc.

engine number 12h996aa 138659

[racingbob]

my  engine is probably just what you want

 

hif44 carb and mg metro inlet manifold

full maniflow exhaust system

retain the mg cam if ok its a good cam

stage 3 head 35 x 29 got mine ebay £265

med substack and itg filter from MED

my engine also balanced but not realy needed as cost $150

revotec electric fan - taken original off

my compression 11.1 but keep it to about 10.1

I use millers vspe petrol additive its good

 

hope it gives you some ideas

 

my car goes realy well lots of torque real pleasure to drive

 

heres how it looks in the car

 

[KernowCooper]

 

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

 High lift rockers are seriously misunderstood. They provide more lift for any given position on cam profile. The MG Metro cam is a short duration road cam, good for torque and the extra lift will help the breathing on an unported head aiding torque further, they don't change cam duration and turn the car into a top-end only screamer. For the investment (£150 etc) they represent far better lbft/£ than a modified head....

 

Sorry have to disagree

[racingbob]

 

 

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

 High lift rockers are seriously misunderstood. They provide more lift for any given position on cam profile. The MG Metro cam is a short duration road cam, good for torque and the extra lift will help the breathing on an unported head aiding torque further, they don't change cam duration and turn the car into a top-end only screamer. For the investment (£150 etc) they represent far better lbft/£ than a modified head....

 

Sorry have to disagree

 

haven't got 1.5 on mine but david vizard said they work ok with mg metro cam

 

I did think about fitting them but worried would lose the mid range torque

[paulusmaximus]

my  engine is probably just what you want

 

hif44 carb and mg metro inlet manifold

full maniflow exhaust system

retain the mg cam if ok its a good cam

stage 3 head 35 x 29 got mine ebay £265

med substack and itg filter from MED

my engine also balanced but not realy needed as cost $150

revotec electric fan - taken original off

my compression 11.1 but keep it to about 10.1

I use millers vspe petrol additive its good

 

hope it gives you some ideas

 

my car goes realy well lots of torque real pleasure to drive

 

heres how it looks in the

 

 

 

 

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

 High lift rockers are seriously misunderstood. They provide more lift for any given position on cam profile. The MG Metro cam is a short duration road cam, good for torque and the extra lift will help the breathing on an unported head aiding torque further, they don't change cam duration and turn the car into a top-end only screamer. For the investment (£150 etc) they represent far better lbft/£ than a modified head....

 

Sorry have to disagree

 

haven't got 1.5 on mine but david vizard said they work ok with mg metro cam

 

I did think about fitting them but worried would lose the mid range torque

 

 

my  engine is probably just what you want

 

hif44 carb and mg metro inlet manifold

full maniflow exhaust system

retain the mg cam if ok its a good cam

stage 3 head 35 x 29 got mine ebay £265

med substack and itg filter from MED

my engine also balanced but not realy needed as cost $150

revotec electric fan - taken original off

my compression 11.1 but keep it to about 10.1

I use millers vspe petrol additive its good

 

hope it gives you some ideas

 

my car goes realy well lots of torque real pleasure to drive

 

heres how it looks in the car

 

that looks smart mate ..any idea what hp your getting from that set up ?

[racingbob]

 

my  engine is probably just what you want

 

hif44 carb and mg metro inlet manifold

full maniflow exhaust system

retain the mg cam if ok its a good cam

stage 3 head 35 x 29 got mine ebay £265

med substack and itg filter from MED

my engine also balanced but not realy needed as cost $150

revotec electric fan - taken original off

my compression 11.1 but keep it to about 10.1

I use millers vspe petrol additive its good

 

hope it gives you some ideas

 

my car goes realy well lots of torque real pleasure to drive

 

heres how it looks in the

 

 

 

 

I'd not spend money on 1.5 rockers there are better ways to spend money on that  spec of engine, and for the little small amount of bhp it gives at the top end, on a road car torques is more important, if your cam is worn, the Kent 266 is the modern day version

 High lift rockers are seriously misunderstood. They provide more lift for any given position on cam profile. The MG Metro cam is a short duration road cam, good for torque and the extra lift will help the breathing on an unported head aiding torque further, they don't change cam duration and turn the car into a top-end only screamer. For the investment (£150 etc) they represent far better lbft/£ than a modified head....

 

Sorry have to disagree

 

haven't got 1.5 on mine but david vizard said they work ok with mg metro cam

 

I did think about fitting them but worried would lose the mid range torque

 

 

my  engine is probably just what you want

 

hif44 carb and mg metro inlet manifold

full maniflow exhaust system

retain the mg cam if ok its a good cam

stage 3 head 35 x 29 got mine ebay £265

med substack and itg filter from MED

my engine also balanced but not realy needed as cost $150

revotec electric fan - taken original off

my compression 11.1 but keep it to about 10.1

I use millers vspe petrol additive its good

 

hope it gives you some ideas

 

my car goes realy well lots of torque real pleasure to drive

 

heres how it looks in the car

 

that looks smart mate ..any idea what hp your getting from that set up ?

 

yes was done at slark and about 73bhp at 5600 and 79 torque at 4100

 

all dynos seem to read different

[fwdracer]

 

If there is an engine number available (12H) put it up on here and it should be able to work out year etc.

engine number 12h996aa 138659

 

MG Metro 1300 leaded fuel pre 1989 1275cc 12H996AA - So if the head is original it'll have the 35.6mm inlet valves and higher CR. If you want to run unleaded juice you may need hardened exhaust seats. Or go for a petrol additive if you don't do much mileage.

[Guess-Works.com]

12H996AA is the first generation MG Metro engine (mk1) so seriously early in production... Circa 1982-4

Edited by Guess-Works.com, 14 March 2015 - 07:41 PM.