Hi,

 

I would like to machine my boost jets for my Z. Could you give me shape dimensions in order to realize the parts? Which kind of bore have I to keep to have a 13-14 PSI?

Thanks for the info.

 

Stéphane. :xxx:

Appoximately 7mm diameter with a 1mm bore.

Make them about 2cm long :)

thanks.

I just have to machine a cylinder???

There isn't a special external shape to machine?

yup, they just push into a hose. i would make 1.2 & 1.1 mm ones also & start at the largest size 1st.

 

1.0mm jets gives me 16psi

Ok many thanks for the info!

Ok many thanks for the info!

 

Why not buy welding tips with the required hole size? That's what everyone else does. There have been dozens of posts and tech sections in Forums,

 

e.g. post from Red Dwarf, an Aust300ZX Forum member:

 

"Boost Jets - $5.00 - 10 minutes - and whooosh !!! 14 Jan 2005 01:36 I bit the bullet today, bought some welding tips, 1.2 mm, $5.00 for a pack of 4.

Cut them off to 10mm long, tidied up the cut, it is very important as the hole can get much smaller if not cleared out properly, I put a small bevel on the edge of the hole to match the front.

10 minutes to install them and now the standard boost gauge reads 6.5 hoogamagooglas instead of 5.5, and noticable more power and this would roughly translate to approx 12.5 to 13 psi, which I believe from all the forums is quite safe and I am within the limits of the standard gauge...? clutching at straws here...

happy with the result so far.

I am aware of the factory gauge being possibly out, but no pinging at max boost at 7000 rpm ........."

thanks.

I just have to machine a cylinder???

There isn't a special external shape to machine?

 

Stephane,

 

I sell professionally designed boost jets. These have been designed by an expert to maximise their effectiveness and minimise any aerodynamic flaws. As you know, boost jets run the risk of "spiking" the pressure due to the wrong shape of the nozzle (most welding tips are not ideally shaped to provide a sustained airflow at increased boost levels). The jets I sell are shaped in such a way to best control the airflow ahead and behind the jets. They are a bit pricey compared to your average MIG welding tip but the benifits of a properly engineered part far outweighs the potential for disaster. £35 for two boost jets of any bore (available from 0.8 ~ 1.4 mm in 0.1mm increments), 4 stainless steel fixing bands and the actual drill bit used to drill the bore (this is provided to (a) ensure we've drilled the correct aperture and (b) to periodically clear the jet from debris).

 

All the best,

 

Dan

Stephane,

 

I sell professionally designed boost jets. They are a bit pricey.... £35 for two boost jets.........., 4 stainless steel fixing bands and the actual drill bit used to drill the bore (this is provided to (a) ensure we've drilled the correct aperture and (b) to periodically clear the jet from debris).

 

All the best,

 

Dan

 

You can't be serious.

 

How many of these do you sell???? But then, there are a lot of people who take some sort of masochistic pride in paying exorbitant prices for every day things, especially car parts and accessories, just so they can impress others.

 

The Emperor's new clothes.

You can't be serious.

 

How many of these do you sell???? But then, there are a lot of people who take some sort of masochistic pride in paying exorbitant prices for every day things, especially car parts and accessories, just so they can impress others.

 

The Emperor's new clothes.

 

Of course I'm serious ... aero- and fluid dynamics are important factors to consider when designing internal (or even external) parts which come under extreme pressure. The shape of a nozzle has a direct effect on airflow and pressure patterns both of which can cause serious damage to other parts if the right conditions are met. The development and initial product run are expensive and time consuming - which is reflected in the price. Demand being what it is the price should eventually come down. Remember, this is not about providing the cheapest products but the best engineered and most effective/efficient product balanced with a fair market price. I'm not getting rich from this side-line business - I'm doing it because I am an enthusiast and enjoy sourcing the best parts for the Z community.

 

The Emperor's new clothes it may be but at least the customer has the knowledge that he/she has bought something which has been properly developed, extensively tested and fairly priced.

 

Have a nice day.

 

Dan

Hi Yellazed.

 

Yes this is a good bit of kit, & has been well recearched over a year of engineering development.

 

http://www.300zx.co.uk/forums/showthread.php?t=39851&highlight=boost+jets+age

 

The Emperor's new clothes..........lol......sigh.

 

Buy them - you'll see :shock: :) :)

 

 

harve

Danny: Caveat Emptor.

Whether it is tower strut bars or boost jets, let the buyer beware.

A lot of the readers of this Forum, being newbies, or at least, less experienced, place a lot of faith in what the more experienced members tell them.

If I believe something is a crock, I feel obliged to expose it.

There needs to be some balance.

 

Why don't you publish the scientific evidence that proves your $90 boost jets perform even an order of magnitude better than my $5 welding tips? Then the buyer can decide if he will get the return on his investment in proportion to the almost 20 times higher price?

Yellazed, mate,

 

I would be more than happy to answer any of your questions :)

 

harve......07973-324821 or rossharvey@rossharvey.com

Yellazed, mate,

 

I would be more than happy to answer any of your questions :)

 

harve......07973-324821 or rossharvey@rossharvey.com

 

Thanks, Harve, but rathet than do it by PM, let's allow all the members to benefit from your information.

 

Please publish the lab test results comparing the fluid dynamics of your boost jets (I take it these are the ones Danny is marketing?) with those of a range of welding tips correctly trimmed and counter sunk as described above. Then follow up with dyno test results for the same comparison.

 

Then, if the overwhelming evidence shows that there is an outstandingly better performance from your product, the consumer can decide for him/herself that it's better to spend 35 quid than 2 quid on boost jets.

 

You claim that MIG tips are innacurately machined. Maybe so, although the manufactureres seem to disagree, being as passionate about the precision of their products as your are about yours.

 

I don't have a problem with your claim that your product is superior, I just don't see it as value for money, when there is a quite affordable, acceptable alternative available.

 

So, please publish the evidence.

Dear yellazed,

 

Thankyou for your concerned responce, as you have no idea what I really do for a carreer in the UK, I suggest you go & buy some $2 mig tips.

 

A lot of the members & friends on this forum/club have benifited from my products & workmanship, & im not even a trader.

 

Many others (I guess!) are very happy that I choose not to develope this hobby of the Z32 & my business together

 

Its all theres as far as im concerned, & the traders - good wishes to you all.

 

harve.

 

Works in Kwik Fit!

 

Do'in (MOD custom, Avionics solutions, Pneumatic progression, oh yes & sometimes I work with the odd air preasure or two)

Thanks, Harve. That clears it up, then.

sorry to hi-jack, but have just fitted what i thought were 0.8mm jwt jets and am getting 0.60 hkPa max boost - i only work that out to be about 8.5 psi???