Throttle Body

Rich H · Post by **Rich H** » Tue Jul 25, 2006 5:25 pm

My plan is to use an offset dowel but with a slot for a screwdriver in the top so you can alter the offset by turing the pin then re-clamp with the bolt. Might even look at driling another hole in the end of the camshaft so I can fit 2 pins to reduce the chance of slipping. Even if it did slip the worst case effect would be to alter the timing by a couple of degree's max, should be no chance of clatter-clatter-bang.

Post by **Shug** » Tue Jul 25, 2006 5:26 pm

John Reid wrote:
Shug wrote:
You sure the opening in the plenum is big enough for 56mm? It probably is, I've not looked at one in ages - the standard TB has a venturi shape, doesn't it?
Might not be but its the alloy VVC one so I have some scope to open up the inlet a bit and smooth out the flow as best I can.

Another question would be is it actually the TB that's the restriction? Can the 135 head flow enough air to make sense of a 56mm TB?

I don't have the answer to that, as I don't know of another car using it....

IT probably can though, as you hear of power gains with slapping DTH TB's on lightly ported heads (and the area of those added up will be more than 56mm!)

It probably won't hurt (betcha it's a cnut in traffic though!)

Post by **Shug** » Tue Jul 25, 2006 5:28 pm

RICHARDHUMBLE wrote:

My plan is to use an offset dowel but with a slot for a screwdriver in the top so you can alter the offset by turing the pin then re-clamp with the bolt. Might even look at driling another hole in the end of the camshaft so I can fit 2 pins to reduce the chance of slipping. Even if it did slip the worst case effect would be to alter the timing by a couple of degree's max, should be no chance of clatter-clatter-bang.

All easy enough if you have the materials & tools to hand (thanx HM Govt!)

Cool, sounds like a plan

Victor Meldrew · Post by **Victor Meldrew** » Tue Jul 25, 2006 5:28 pm

It was much cheepness off fleebay, £48.. worth a go. The plastic one is sticking so its already a cnut in traffic..

Rich H · Post by **Rich H** » Tue Jul 25, 2006 5:28 pm

Your welcome to borrow my carbide burrs that I have been porting with if you want, they make short work of ali and are easy to control. Once I have finished that is.

Rich

Post by **Shug** » Tue Jul 25, 2006 5:29 pm

John Reid wrote:It was much cheepness off fleebay, £48.. worth a go. The plastic one is sticking so its already a cnut in traffic..

- no brainer then

Victor Meldrew · Post by **Victor Meldrew** » Tue Jul 25, 2006 5:30 pm

RICHARDHUMBLE wrote:Your welcome to borrow my carbide burrs that I have been porting with if you want, they make short work of ali and are easy to control. Once I have finished that is.

Rich

Im afraid you'll be ofski before I takle the manifold off for a fiddle job. Thats one of my winter to do items.

Post by **Shug** » Tue Jul 25, 2006 5:30 pm

RICHARDHUMBLE wrote:Your welcome to borrow my carbide burrs that I have been porting with if you want, they make short work of ali and are easy to control. Once I have finished that is.

Rich

I don't trust myself... Well, maybe when I can be arsed getting my engine back off Hambo (note to self, do NOT start scouring ebay for cheap head(s))

Rich H · Post by **Rich H** » Tue Jul 25, 2006 5:33 pm

No need to start looking, I have one here you can have...

It's a low port, so think of it as a "challenge"

Post by **Shug** » Tue Jul 25, 2006 5:37 pm

RICHARDHUMBLE wrote:No need to start looking, I have one here you can have...

It's a low port, so think of it as a "doorstop"

....that's more like it.....

Rich H · Post by **Rich H** » Tue Jul 25, 2006 5:41 pm

It's going on e-bay as soon as I can be bothered to get it bead blasted (More lager) some dope will buy it.

Lets face it the other options are door-stop, anchor or blunt instrament...

Victor Meldrew · Post by **Victor Meldrew** » Thu Aug 03, 2006 4:53 pm

Finaly got my grubby paws on the 56mm throttle body. It has aleady been modified by previous owner, looks realy good though.

It needs a breather inlet which is the lower hose on the plastic body. The mould is there but it isnt drilled out. Will have a go at drilling it out and let you know how it goes.