Calling Dave ( PP ), Malone And Dr. D GTD vs Merc injectors

[subsonic]

Taken from: Making the jump N/A to TD


Well, the man said to ask you. So........


Subsonic wrote

Injectors / nozzles: Lots and lots of information. Some say no change, just difference between old and new. More fuel at higher pressure is better, but what is the upper end? With all the nozzles I see for sale out there, is there a difference in spray pattern? Are certain spray patterns better suited for 1.9’s or 1.6’s? Many I see don’t actually say what size the nozzle is. I would expect that this would be one of the pieces of information Giles would need to get you the correct pump set up.

jtaguay replied:
[/quote]The stock, gtd, 1.9td are all so close that it won't make much differnt to Giles for the pump setup, but if you do have them already, then it wouldn't hurt either, the biggest baddest ones out there are really hard to get ahold of as Jake is preoccupied with other things, but the dieselicous ones are supposed to be huge, agian I know Malone has a set, but they are untested to this point. Merc nozzles provide better flow then any of the vw ones. I know that Malone and Dave @ PP tested some ahwile back and so they probably would be the ones to ask about this. As well Dr. Diesel had shaved the pintle or shimed the pintle for more lift and got a fair bit more out of the stockers iirc.

What kind of results did you guy's see?  Which injectors did you test? Are the Merc ones comperable to Dieselicous nozzles?
Thanks Jim

[subsonic]

OK, that's not exactly how it was supposed to come out :?
Have patience, I'll figure out this quote  code list stuff eventually :oops:

[malone]

I lost about 10 HP after switching from brand new OEM injectors to brand new GTD nozzles (swapped into used injector bodies & pop-tested). The GTD injector set however had a slightly higher breaking pressure, which may have affected fuel timing. Still, the question of GTD gains over new OEM injectors remain.

You'll surely see an improvement if you get new GTDs (or whatever new nozzles) over an old set of nozzles. New nozzles replacing worn ones will restore fuel economy, power, and reduce smoke.

With MB 300D injectors I think I felt a little more power.. but I was running NA at the time, not under boost, and it was very dark out so I couldn't tell how much extra smoke there were. I would test these injectors again with boost. I don't have a running TD at the moment though.

I still have the prized Dieselicious nozzles, they're rare.. I really wish my TD's running so I can try these nozzles, but it'll have to wait.

[jtanguay]

I'm actually feeling a bit of a drop in performance myself with the GTD injectors... maybe i'll try advancing my pump to see if it helps any... so far i think my economy went up a little though and there is a little less smoke.

[malone]

If I need new VW injectors I would probably buy brand new OEMs (preferably brand new, not refurbished) instead of GTDs. It costs more though, about 265 CAD for a set if I remember correctly unless you find a good source.

The power loss with GTDs was very noticeable. I have not been convinced that advancing the timing a bit to compensate for the higher breaking pressure will not only restore the lost 10HP, but also gain a few more HP.

[Mark(The Miser)UK]

If I need new VW injectors I would probably buy brand new OEMs (preferably brand new, not refurbished) instead of GTDs. It costs more though, about 265 CAD for a set if I remember correctly unless you find a good source.

The power loss with GTDs was very noticeable. I have not been convinced that advancing the timing a bit to compensate for the higher breaking pressure will not only restore the lost 10HP, but also gain a few more HP.

[/size]

Do oem GTD injectors have different springs to standard? so that you don't get GTD effects with only GTD nozzles? Perhaps this accounts for the powerloss? I'm just speculating here  but.... if power is related to fuel volume in any given situation then loss of power must (may)(partly) be due to less fuel. If both springs were set to the same tension (opening bars-wize) but the pintle travels further in   a pure GTD setup due to a weaker spring then the standard springs would 'open less' and give less fuel ...eh??...:roll:  {bit convoluted sorry}

[935racer]

I've run a few sets of the MB complete injectors on a few locals rides now, definately more power than GTD or OEM, not a huge kick in the pants but every bit counts :wink:

[subsonic]

Does anyone actually say what the flowrate,or opening size is on nozzles?  Sometimes I see a number designation and other times it is just described as more powerful.  What Merc injectors where you using?
Just how big are these bad ass dieselicious injectors?
I am starting to move off theroretical and will need some soon.
Thanks, Jim

[malone]

I should have noted that the GTD nozzles I tried were aftermarket, not genuine. A brand new set of genuine GTD injectors may be slightly better than standard 1.6TD injectors but they're likely more expensive.

The Dieselicious custom nozzles flow about 64% more than what GTDs flow over stock if I remember correctly.

[clbanman]

Do you have a link for the Dieselicious nozzles?  I did a google search and got way too many links for gay porn.

[malone]

:lol:
fspGTD on this board produced these nozzles. He named his company Dieselicious and he did business only on this site as far as I know, which is why you didn't find non-homoerotic links anywhere else.

He was one of the most valuable contributors to the IDI community, but a few months ago he disappeared online. Presumably to concentrate more on his fatherly duties.

fspGTD's webpage, although outdated, has his e-mail address on it:
http://home.comcast.net/~vwgtd/

You may have a better chance reaching him via email. I sort of doubt he's continuing production of the Dieselicious nozzles (I imagine it's labour-intensive), but it doesn't hurt to ask.

Cheers,
Mark

[2mAn]

i have been trying to get ahold of jake sincei  moved to seattle. it drives me nuts knowing he lives in the same city as me and i have yet to meet the man :x

[Mark(The Miser)UK]

Anyone have a clue if GTD springs have a different characteristic to OEM?

[935racer]

Yeah where the hell is Jake? :?

[subsonic]

64% over stock GTD! Damn!  Has anyone actually run these dieselicious injectors in thier rides.  Back in the day before midnight diaper changes, what did a set go for? Man with these and the GSP (Giles Super Pump   ) you must be pumping out the fuel like the Valdeez.