4 Valves per cylinder ?
Discussion
bionicjim said:
The speed 12 fitted in a cerb and that is a 90 deg v12
Also looking at the pic the exhaust point strate down now looking at the standerd
Head set up on mine the exhausts are set horizontal so the thin cam set up should fit better if not the same
Of course thus is just my opion
The Cerb Speed 12 looks to be built more like a Lotus Elise with it's clamShell Tub Unlike the cerb with the back bone chassis and fiberglass body dropped on top so is much much wider with no real inner wings. So it can basically fit any engine. I doubt many DOHC v8 engines would fit a Cerb.Also looking at the pic the exhaust point strate down now looking at the standerd
Head set up on mine the exhausts are set horizontal so the thin cam set up should fit better if not the same
Of course thus is just my opion
spitfire4v8 said:
It might not be going in a cerb (if it's not a wind-up / early or late april fool joke lol). The block doesn't look to have any liners in either. Maybe they're mocking it up on a scrap casting first? There looks to be an awful lot of work to do if it is a proper project.
Hi Jools, if AJP8 owners think this is a big project what about Race Prooved speed12. Was any progress made on their speed 12 engine!!!. Jaguar XJ12 block I believe with 2 speed six cylinder heads. Either engine would be a massive amount of work, good luck to the project engineer who takes this on but I think like Jools it might be a windup.
plasticman said:
Maybe because the Speed six engine was based on a jaguar design and with bore spacings being very close to the jag alloy V12 block. It might seem a better choice than fabricating a block from sheet steel
Yea I understand that but why bother is what I meant. It's still not a TVR engine and you'd be creating a hybrid with all the issues that that entails. Better to do something simmilar to what's been done for Grahams 2nd car imo.
Gazzab said:
Will be no more unreliable than tvrs own s12 engine...?
That's not a very good yardstick to judge it by really.Horses for courses I'd guess but I'd be wanting something that was likely to be reliable and not needing constant fettling just to keep it in one piece, it gets expensive when you have to keep totally disassembling the whole front-end to work on the car.
I've watched the Speed12 being built over the last 3 or so years and it's a complicated process to get right and not something you want to have to do on a regular basis.
Got some more news on this last night.This engine is been developed and they have moved forward a bit with it.The heads fit the block studs perfectly.The bore spacing will be the same.The cams will be belt driven so they say and all engines will be 3 stage dry sump system,the old triple pump will be discarded as will all the gears and chains.
Now for the juicy bit,power outputs Projected will be between 480bhp for the 4.5 version and upto 700bhp for the 4.8 full race engine as for torque it will come out close to 390ft lbs upto 475 ft lbs and a turbo version could well hit 1000 bhp so i,m told but we shall see how things develope.No harm in trying as the saying goes.I have put my name on the first 4.8 race engine so i hope things work out for them.
Now for the juicy bit,power outputs Projected will be between 480bhp for the 4.5 version and upto 700bhp for the 4.8 full race engine as for torque it will come out close to 390ft lbs upto 475 ft lbs and a turbo version could well hit 1000 bhp so i,m told but we shall see how things develope.No harm in trying as the saying goes.I have put my name on the first 4.8 race engine so i hope things work out for them.
Edited by wadsapple on Thursday 11th October 14:09
I think this whole thing is great
I know the thought of mixing parts is not every ones cup of tea
But I think we need to get the old tec
Up to date it's 2012 not 1995 and things have moved on
I can't see the problem with a stronger/more efficient /more power/
I really can't see the prob
If what I'm reading is true and I have no reason not to believe
It's not then I'm well up for the engine
This is no diffrant to when KAD did the twin cam head for the A plus
And that made a huge diffrance to the engine
I know the thought of mixing parts is not every ones cup of tea
But I think we need to get the old tec
Up to date it's 2012 not 1995 and things have moved on
I can't see the problem with a stronger/more efficient /more power/
I really can't see the prob
If what I'm reading is true and I have no reason not to believe
It's not then I'm well up for the engine
This is no diffrant to when KAD did the twin cam head for the A plus
And that made a huge diffrance to the engine
I wish them all the very best but if they achieve a reliable engine producing those sorts of outputs, they'll be doing better than Ferrari etc who make it their life's work to produce high powered reliable engines with a much larger development budget.
I'm always a little cautious in these cases, and not very adventurous!
I'm always a little cautious in these cases, and not very adventurous!
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