11 replies to this topic

[overboost]

Just bought a 1293 from a collegue at work who has upgraded to a 1380 for hillclimb events.

Its to replace my 998 as the engine is really the only thing needed to finish my car off, what sort of power figure should it be pushing out its a a-series 1293 with a single 40 SU carb. The engine came out running and is complete with gearbox etc.

It was based on a 1275GT engine and had cylinder head work, pistons etc...

Im going to clean it all and paint it up as well, anything to check or change before fitting that I should be aware of?

Cheers.

Edited by overboost, 08 January 2007 - 12:59 PM.

[Jimmyarm]

Single 40 SU carb ?

If its running ok and you saw it running before then no reason not to plonk it in, then take it to a rr to check its all ok and off you go !

[The Matt]

That's a really difficult question to answer, a 1293 could push out anything from 40bhp to 100bhp. It depends on soooo many factors.

I would pop the head off, check the bores for wear, pop the caps off the bearings and check the condition of the crank and shells. General stuff really. If it is complete with gearbox, I'd be taking it tp pieces to check things like the clutch, seals, gaskets etc. They're easier to change when the engine is out!

[Jammy]

I'd say if its a standard 1275, bored out to 1293, with the standard carb, then you'll probably be looking at about 65bhp?

[overboost]

What are they standard? Because im sure my 998 is about that figure already. It will have stage 1 exhaust and filter fitted as well...

[Bungle]

my 1275 engine with standard cam modded head, 1.5 rockers and stage 1 kit has 85 bhp at the crank or 68 at the wheels

so yours should be somewhere around that depending on the cam and head work

[overboost]

Well, I want 90bhp at the flywheel.

What is a 1275GT engine standard @ flywheel? Does anyone know...?

It was an overbored 1275 engine running standard cam and a HIF40 SU carb.

I was planning to fit a weber twin 40 carb. What ratio roller tip rockers would be good to use with the engine?

Anything else I could do which works well on that type of engine?

Cheers...

[Retro_10s]

Well, I want 90bhp at the flywheel.

What is a 1275GT engine standard @ flywheel? Does anyone know...?

It was an overbored 1275 engine running standard cam and a HIF40 SU carb.

I was planning to fit a weber twin 40 carb. What ratio roller tip rockers would be good to use with the engine?

Anything else I could do which works well on that type of engine?

Cheers...

i don't think a weber is needed really but if you want the looks and sound fairplay, just chucking in a good cam... maybe a 290, <also do you mean HIF44?... you write HIF40> and doing some headwork will really spice things up, also worth looking at decent air filtration setups and non-helical gear sets.......not suer about power on paper though for that kinda set-up

1293 would be a good base to start thinking abot webers... and maybe 1298 (did i here this is achievable with triumph pistons??..)

Edited by Retro_10s, 10 January 2007 - 05:35 PM.

[Jimmyarm]

If its had headwork already (any idea by who and what was done ?) then the next logical step is to change the cam, but thats an engine out job.

As Retro said, twin webbers would be a bit OTT at the moment, your better off spending the money elsewhere.

[Bungle]

a 1275 GT had much the same as the rover coopers

the old cooper s had a bit more

so i guess you want the same spec as mine but with a hotter cam

[Bluemini]

Twin carbs will be an over kill. Standard 1275 power is around 56bhp. 1293 is a good strong engine and could see a wide range of bhp figures depending on the spec. 1.7 roller tips will work well altho you will encounter other clearance problems with these, especially if you have a high lift cam. You need to check your carb, you probly mean a HIF44 in which case this is more than up to the job, when set up correctly they are as good as a weber. Power figures at the crank mean nothing, its the power at the wheels that counts, and more importantly the torque figures. Straght cut drops are a good starting point to reduce power loss thru the trans, and they sound good too. How much head work has it had done? is it a diy job thats just a quick tickle with a grinder or is it a propperly done head by a pro? If you want me to take a look at the engine for you then give me a shout, I drive past your place most nights.

[Jordie]

id strip it down, fit new gaskets, bearings and oil pump. new clutch isnt dear either.