enlarged throttlebody?

[LegoHead]

I was thinking of making the inlet at the throttle body larger, I am sure you can buy one off GDI. But I have facilities to do it myself.

What sort of gains will it give?

 

[mr bognor]

On my 200 BRM i have changed from the 48 mm std one to the Lotus Elise 52 mm one same engine just 4 mm larger and worth every penny .

 

[LegoHead]

I could get the plenum side bored out, and could rebuild the current steppermotor into a new package i think.

I dont think there is a straight swap on this engine. :-(

 

[Fred@BTM]

we can enlarge your FBW TB if you're interested Dave

 

[Matt 16v]

what gains/benfits are to be had by this Fred?

 

[LegoHead]

we can enlarge your FBW TB if you're interested Dave

How do you go about doing this? Just a rebore and new valve?

 

[Fred@BTM]

rip the unit apart, bore it out, new butterfly plate, new plastic casing

this is the one our guys make for the minis, we haven't made any for the clios yet

http://www.lohen.co.uk/shop/proddetail.asp?prod=LohenThrottleBody

 

[Matt 16v]

nice, would they be a similiar price to that then?

would it be a good mod to do with a reworking of the inlet manifold?

 

[LegoHead]

Fred do you have any knackered throttle bodies I can play about with?

I would prefer to get this done myself as the machine shop we use at work can do the machining cheap.

 

[Fred@BTM]

you need someone who can do rapid prototyping to make you a new plastic cover (you have to cut off the old one)

i have 2 sapre 172/182 FBW TB's but they ain't knackered

 

[LegoHead]

you need someone who can do rapid prototyping to make you a new plastic cover (you have to cut off the old one)

i have 2 sapre 172/182 FBW TB's but they ain't knackered

How much for one then? Give me a good price!

The place I work at design and make prototype motors, I'll have a word to see if there are any local firms for the plastic covers.

Or our uni had a mahoosive rapid prototyping machine.

 

[Fred@BTM]

They belong to his lordship, so i'll ask him how much lira he requires

 

[Ali]

Stoddie has an Inlarged ITB, No real point imo.

 

[R20 CWH]

Stoddie has an Inlarged ITB, No real point imo.

jealous little munchkin?

 

[Fred@BTM]

his is a race one, as we dicovered last year its pointless on a road car hence forth we canned the idea

 

[Ali]

Stoddie has an Inlarged ITB, No real point imo.

jealous little munchkin?

No No!...Mines quite fast enough. With cams and a 182 mani...I'd be over 200bhp too! xx

 

[Matt 16v]

theres a 172 tb on ebay at the moment http://cgi.ebay.co.uk/Renualt-Clio-...0QQihZ019QQcategoryZ10410QQrdZ1QQcmdZViewItem

 

[LegoHead]

theres a 172 tb on ebay at the moment http://cgi.ebay.co.uk/Renualt-Clio-...0QQihZ019QQcategoryZ10410QQrdZ1QQcmdZViewItem

thanks, but that is way too much for me. some days you can pick them up for 20 quid somedays they are this much.

 

[BenR]

zero point in a bigget TB, its not a point of restriction.

 

[LegoHead]

well the feasibility study is concluded. On to my next wild idea.

 

[BenR]

Its big enough to support well over 200bhp, the 90 deg bend before the TB due to spce is more of an issue.

 

[LegoHead]

Its big enough to support well over 200bhp, the 90 deg bend before the TB due to spce is more of an issue.

cool, so relocating the battery may be a better idea?

 

[matty w]

as said theres no point,especially a 67mm or whatever a few are running theres off 300bhp touring cars that rev to 10 grand its probably more likely to bog down at full throttle

 

[A13EX F Trophy No70]

i know people are saying this wouldn't be worth it but i bet it wouldnt take much work to make it bigger plus remove the plenum and enlarge the opening on that a little too, cant do it any harm could it?

might be tempted have the work done if it's not going to cost too much

 

[mini-valver]

Alex, I think you're missing the point. The actually TB is'nt restrictive, it's the bends before and after it.

 

[ludaprix]

i have a bigger tb courtesy of gdi and i love it, felt the difference in throttle response over the standard ph1 172 body straight away, the car just feels alot more lively!

 

[mini-valver]

That's cams, inlets and OMEX too, so it's going to!

 

[A13EX F Trophy No70]

Alex, I think you're missing the point. The actually TB is'nt restrictive, it's the bends before and after it.

i know what they're saying but at the same time I also know what a difference it made on my cooper s,

add to that i've got some silicone pipes coming to me by the end of the week to improve airflow and to allow me to ditch the crappy intake pipe which looks like it should be sticking out the back of a dryer.

might have to get a second hand throttle body and get it engineered out, cant see it costing an awefull lot of money.

 

[mini-valver]

Is the throttle body on the Cooper S restrictive though when tuning it? The TB on the Clio is'nt unless, as Ben said, you're going further than 200+. T

 

[A13EX F Trophy No70]

ben wouldn't the throttle body even benefit from having the lip at the top profiled more so that airflow into it is better?

 

[Andyman]

Folk on this forum are obsessed with anything to do with the intake systems on 172's / 182's

Loads more areas to concentrate on with out p****** about with 1- 2bhp gains ..

 

[A13EX F Trophy No70]

Folk on this forum are obsessed with anything to do with the intake systems on 172's / 182's

Loads more areas to concentrate on with out p****** about with 1- 2bhp gains ..

such as

i could get the tb engineered and a new butterfly for less then £100
find me a mod that costs less than that but gains 1-2 bhp

 

[Andyman]

Folk on this forum are obsessed with anything to do with the intake systems on 172's / 182's

Loads more areas to concentrate on with out p****** about with 1- 2bhp gains ..

such as

i could get the tb engineered and a new butterfly for less then £100
find me a mod that costs less than that but gains 1-2 bhp

Weight reduction, thats free

 

[ja.jack]

LOL Weight reducing is hardly tuning.

 

[LegoHead]

LOL Weight reducing is hardly tuning.

thats the stupidest comment today.lol.

You tell me one racing team that doesnt lose weight to increase bhp/ton?

 

[ben_p]

LOL Weight reducing is hardly tuning.

When did you start working for GDI Jim?

 

[Andyman]

LOL Weight reducing is hardly tuning.

Take your back seats out etc.

That will make more difference to performance than any fancy IK and TB enlargment ever could!

 

[ludaprix]

That's cams, inlets and OMEX too, so it's going to!

o yes very true, ill keep my mouth shut now lol

 

[ChrisR]

LegoHead! you've got a turbo clio, if you're not happy with performance I do'nt think a bigger body will make much dif.

Check the dates of the postings, they are all pre Clio Turbo

 

[TheJesus]

They taste good.

It's common knowledge that the TB is'nt a restiction, I just agreed. Hardly tea bagging.....

common knowledge to whom? because someone on the internet that "claims" they don't make any difference and everyone jumps on the bandwagon? amazing...

I've decided I'm now a car tuner, BecauseJesusSaysSo Technology Tuning (tm) is my new company. I've decided that I'm an NA Clio tuning specialist and that using swiss cheese (commonly found in supermarkets) in your airbox instead of the OE filter, inlet matching and a 5" straight through system will give you 100bhp at the wheels increase. It costs only £5k, I've not actually done it or physically proved it works, but what the f**k, it works because I say so

... give me strenght superman