BB Performance tuning turbo 19

Level 2 User Joined: 23 Feb 2004 Posts: 54

Found these pics of 19 turbo done by BB

CANT WAIT

just brought this

needs a little tyding to welds and some polish will post pic when ready

Site Subscriber Joined: 22 Mar 2004 Posts: 150

you wanna check out the for sale forum chet had his old turbos stuff up for sale mate, at alot cheaper than bb. have a look. but would love to see a turbo 19 instead of a clio.

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

u get that off ebay random? i got pics of that bein made Wink

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

Thats a phase one innit?

Level 2 User Joined: 23 Feb 2004 Posts: 54

yea brought from ebay Â£102 +post. BB wanted Â£425 for theirs

Level 4 User Joined: 10 Mar 2004 Posts: 97

hi mate i wouldnt mind a few close ups on that manifold, if you you would be so kind!!!

Gay Rights Activist Joined: 07 Apr 2004 Posts: 1268

it looks to me as if the runners on 2&3 are far to short in comparison to the other 2. not very equal length

Level 4 User Joined: 10 Mar 2004 Posts: 97

from that pic it looks just like a more rounded one but same probs as the cast iron jobbie from, ktec,bb,fastchip,
there aint a load of room back there but some one must have the corret size and shapped one!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

Liek stan Says 2/3 are to short. will probably get reversion into 2 and 3 cyls. Just like the cast effort.

The only really practical way to fit a turbo on these and have it efficient and capable of big power is to move it to the side of the lump above the gearbox.

Like renault did with the Turbo 2, but leave out its combined cooler and manifold.

Then make a decent inlet manifold.

Retroholic Joined: 12 Feb 2004 Posts: 5685

Is the standard valver manifold not decent at all or just not decent for a turbo? (if theres a difference)

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

There is a difference, its trying to squeeze a turbo in the back while maintaining decent exhaust length

Retroholic Joined: 12 Feb 2004 Posts: 5685

I meant inlet...

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

Oh right sorry. Yes I would have thought so, although matching Turbo with TBs would good!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

The standard valver inlet is ok, they made it with nice long runners to try and get a bit of low end torque which they shouldn't have bothered cos of the daft large ports, ren should have cast arrows into the ports to tell the air which way to go.

The manifold has a plenum then the runners take air out from it and run over the top of the manifold then the air has to endure a nice S bend to get into the actual cylinder. They would have been better curling it the other way to enable a straighter path to the ports.

The manifold also happens to be huge, making it smaller will free up space to notonly work on the engine but allow more air aroudn it. Then you can strighten up the TB.

Runner dia (area) fixes peak power rpm, runner length rocks the power band around that point. Long runner will lift the bottom end but lessen the top end and vice versa.

So thats why the silly big ported 16V's have long runners, to try and reclaim some bottom end go. The ports sizes are fine for very high power outputs, more than most engines will ever make.

I am planning on making a small port 16V head for my lump to get a gain everywhere but especially in the midrange.

the set up thats there is a comprimise for the engine designers faults.

if cosworth had designed the head then it wouldn't be anything like it is. Would have been closer to the megane head really. it would have still made the impressive bhp figure (140bhp from 1764cc's 15 years ago on a production road car was very good) but had a better power band.

Level 1 User Joined: 14 Apr 2004 Posts: 29

like Chris has said, valver head inlet ports are just too big to have low down torque and megane 2lts head has got smaller inlet ports and by that it makes a better head for all around in the rev range.
So why dont you guys use the megane 2lts head on the valver? You got engine bay clearence to use also (since the valver one wont align its inlet ports) the 2lts megane inlet manifold.

Inlet ports can be seen here. Valver head on the left. Megane 2lts head on the right.

Besides the megane head can flow (with a wilder cam) up to 220bhp and has got 33mm inlet valves.

Its not that hard to find this head in uk!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

Yeah but a megane head costs money, I have spare 1.8 heads lying around!

Also it can flow up to 220bhp? it can flow more than that, theres no figure that will say what power an engine will produce, a very rough figure maybe.

Depends whats done elsewhere.

If you stuck a turbo on it then with those valve sizes etc and if you had the cash then you could be over 1000bhp, but then its just a case of chasing things that break around.

Megane head is a better hear, it was used and not made publicly known to try and hide the 1.8's heads cock up.

The other prob with the megane head is you need to machine it to get a dizzy in there.

Level 1 User Joined: 14 Apr 2004 Posts: 29

Said the 220bhp mark since there was a megane maxi using TB's that made 220bhp. It was a example how good the head can flow without turbo or supercharging.

yeap it costs money like anything else, but there are some ppl that have them siting in their garage. Check clio valver owners who have done a megane 2lts bottom-end lump to get near the clio williams power phigures. They use the meganes bottom-end since its cheaper than the williams ones. They keep the std valver head since the megane one uses a different inlet manifold and it wont fit the clio engine bay.

Didnt know about the dizzy cap. megane uses coil pack? hum...

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

yeah megane runs coil pack.

Also the flywheels different, the 1.8's and Williams runn a 2 tooth fly (well it has lots of teeth but you understand) whilst the megane only has 1 tooth.

So If you try and run a dizzy and the non coil pack ECU etc you will have a no go situation.

If you have the time, money and resources then any figure is achievable.

Main limit is how fast you can spin the thing and how high you get the BMEPS without damaging anything.

Level 7 User Joined: 27 Feb 2004 Posts: 243

r u gunna JB weld up the ports then chris?

jimbo

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

There would be no point in just welding up the port, you need to fill the runner so it has an equal shape and volume otherwise I wouldn’t think it would flow greatly

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

i think thats what he meant...