TB’s on my 1.2 16v

[Tom]

Hee Hee

shall i? 100bhp per litre anyone.

 

[Ben P]

not worth it dude. It would still get whooped by standard valvers and would have cost you a bomb to do.

Would be different though

 

[RobFenn]

Ignorant fool!

Why not, and if you do it, ill copy you!

-Rob

 

[BenR]

been smoking crack or something?

 

[Tom]

its just under £3000 to do it

looking at 125-130bhp if the engine can take it

im having a laugh tho im not really goin to waste 3k on geting it to go to 60 quick

 

[Fred@BTM]

Funny you should say this Tom, i recently spoke to Jenvey (theyre doing the TBs on Roamers 172) and they reckon 150bhp is possible!!!!!

Imagine a 1.2 that revs to 9000rpm, bloody hell!!!!

 

[RobFenn]

motorbike engine !!

 

[Tom]

hmm fred you busy?

pm me if you aint

 

[Faboka]

150bhp on a 1.2. Class. But does that include doing things like full exhaust including 4-2-1 manifold. Big valve head, Higher lift cams. If not, 200bhp.

Time to wake up.

 

[Tom]

sounds about right to me matey

 

[Essex_Lad]

so y is it £3k for TB?

wot would the BHP on a 1.4 then?

could some shed some light on wot TB include etc

Cheers

 

[Tom]

150 again mate

 

[Faboka]

Hmm. Could this mean time for a loan in november when my free insurence is up.

 

[BenR]

not as simple as that, your gonna have to concentrate a bit on teh bottom end so that the teeny little motors dont throw their toys out the sump lol.

Too much to do and no real point.

 

[Tom]

dont spoil it shhhhhh

 

[Chris_H]

I was up at ren spares last week and there was a duff 1.2 16V head there, looks like the castings kinda cack so head work should get some nice gains.

I will go back up and get stuff for the white 19 and get that head I think.

Whats the stroke on the 1.2s?

 

[Tom]

cool i need a new head soon mate wanna mess with me mota?

 

[Faboka]

Ok so the bottom end might give way. So that means High comp pistons with lightened and balanced crank and con-rods.

 

[BenR]

you will most probably need H section rods and a special crank to run 9000rpm or more.

 

[Tom]

H section?

English?

 

[Faboka]

Maybe the od rebuild ever mile. sh*t mpg.

 

[BenR]

im pretty sure H section is in english...........let me go consult my sources.

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yup it is

 

[Chris_H]

if you send me the head then aye I will do the porting on it. You can send me the manifolds as well but thats extra.

BenR maybe closer to you so he may be better for the work. I am in Glasgow which means Parcel Force or similar if your in England.

Bottom end may be ok as standard for 9k, whats the stroke on them?

A quick de-flashing and decent balance may be enough for the crank as well.

The enrgys are happy to run at 8k for a long while.

H section rods, cut a rod in half and look at the end and it will be H shaped instead of I shaped.

 

[Faboka]

Anybody seen the performance inlet manifolds for vauxhauls. Think their lexmaul. But they claim a 23BHP increase on corsa c 1.2 16v. That makes it 100bhp. They also claim the same power increase for the rest of the engine range. They cost around £800.

 

[Tom]

Be like that mate it helps

ok try this. i dont understand what h-section means, please explain what you mean in a way that i (who isnt clued up on this) can understand.

 

[BenR]

like a steel I beam, it refers to the crossectinal shape.

But i hate telling non clued up people the meanings as i end up droaning on and on about why, how etc etc........then they know a tiny bit about one area which crosses into another which you have to explain further blah blah, and it ends up being 5 pages long.

Sorry, but im getting lazy now.

 

[Tom]

if you dont tell me i will keep asking whats more annoying?

nice try but incredibly even less useful than saying "h section"

Thanks Chris H for not being "im to clever to explain"

 

[Faboka]

The engine bore and stroke is:

69 x 76.8

 

[BenR]

Quote: Originally posted by Tomclio16v on 05 August 2003


if you dont tell me i will keep asking whats more annoying?

nice try but incredibly even less useful than saying "h section"

Thanks Chris H for not being "im to clever to explain"







nope, i already said im too lazy.

and all it takes is a simple google search

 

[Tom]

or a simple answer.

Besides its done now.

 

[BenR]

Quote: Originally posted by clio dynamique on 05 August 2003


The engine bore and stroke is:

69 x 76.8

undersquare, YUM!

 

[Chris_H]

69 x 76.8 lol its dinky. Have to say I was expecting a shorter stroke.

8 grand is plenty safe for the bottom end, 9k is pushing it. Main prob here will be bore wear due to the bore dia, high side loadings.

 

[Tom]

surely 8000rpm is enough?

 

[Chris_H]

lol ben thatys what I thought as well thus the I was expecting a shorter stroke.

Its a diesel in disguise. lol

 

[Chris_H]

8 grands enough for what 120bhp? Yeah should be if its done right.

 

[BenR]

Quote: Originally posted by Tomclio16v on 05 August 2003


or a simple answer.

Besides its done now.

Fine fine fine,

the short and simple answer is:

In a capacity limited engine you need to run more rpm to process more air to burn more fuel with. To run more rpm the bottom end assembly will need to move faster, this increases piston speeds and puts added strain on rods/crank and the pistons themselves. Thus you run better built, stronger and hopefully lighter parts which can withstand the increased forces associated with faster rates of change (piston up then down roughly equates to 1/3 ton appearing/disappearing 133 times a sec at 8000rpm, dont ask how my formulas are on a peice of paper in the UK.......not something i remember).

H section or I section just refers to the design of the rod.

 

[Tom]

Right so its to do with strength ok thanks.

 

[unofficialPete]

Ok being dappy and stupid and going off topic...



TBs?

 

[Tom]

Throttle Bodies

http://www.jenvey.co.ukwww.jenvey.co.uk

 

[BenR]

4100-4500ft/sec....not too bad, but really depends on compenent strength.

Mmmmmm, oval cylinders lol