ok guys (big power guys) TDI M

[andy2]

I would have thought that running A TDI just over 200 WHP would give the same issue as the IDI as far as compression in coolant.I guess the TDI's can make 50 whp more than the IDI before having similar issues.Any experience there?

[malone]

The fact that a stock IDI compression is 22.5-23:1 vs. a stock TDI's 19.5:1 might have something to do with IDIs blowing headgaskets earlier. I had lower compression.. something like 18:1 to 20:1 I don't know but it was low enough to make the 1st minute of cold start a little rough (no ceramic head coating though), and I still had coolant blow-outs. It should be much more tolerable with a o-ring, which doesn't cost too much AFAIK. Hopefully a simple head o-ring will suffice and not a fire ring....

[RabbitJockey]

haha i never really lost once i had my pump turned up to the highest i've had it, but i try to only race cars that i think are well matched to me.  and cars that i know are slow i just blow past and let them in the soot lol  no chance to catch up

[DVST8R]

One more thing in favor of the TDI and is one of the reason's that I will be going that way for my currnet daily driver, but not my race rabbi build.

At lower then stock CR, even just a thicker HG the IDI suffers in startability, by the time that you knock it down to 17.5 or 17:1 it just about won't start or idle.

This in contrast to the TDI where at 17:1 hardley even uses the glowplugs, to fire, and on a daily driver that low speed idle and the startability makes a big difference, well at least to me.

Oh and 17:1 isn't that low of CR anymore in the diesel world big boosted daily driven diesels are now 14:1 and lower! This is the key to run big boost and have it hold together, the other big key is in the rev range that it runs in, and this is where the IDI shines... Always compermises. :wink:

[hillfolk'r]

on my setup im sort of not happy with the (gtech) approx. 140 hp
but the 230 ft pounds helps make up for it
the gtech torque/hp curve is interesting on the tq. side
it rises dramatically at 2000 rpms+is just flat till 3500+ rpms
im sent about the headgasket issues

[zaprzal]

head o-ring

what does it mean?  :oops:

[SMOKEYDUB]

alright next question.... i have my 12mm giles pump and its based on a 1.6 pump what do i need to do to it to make it work? and what kind of things can i use from a 06 jetta tdi pd. My dad has a 06 jetta tdi at work hit so hard in the fron it snapped the engine mount right off the block so it needs a new engine. The shop that i work at will most likely do the new engine swap. So what can i use out of it considering i will probably be doing this engine swap. can i use rods pistons and crank? Is the head worth anyhting if its not damaged? what would it be worth if i got it with a smashe block?

thanks

jeff

[SMOKEYDUB]

also what injectors to use remember i want big hp. and do you guys know what a tdi long block would be worth (AHU) since i dont need harness or fuel pump it should be cheaper. what would a vnt 20/22/25 be worth? I want to polish ,shotpeen,and balance the rods. what bearings should i use? I have heard some bearings called sputter bearings. What flywheel and clutch stuff could i use i want to just use a normal A2 trans for now. so tell me whats up what i need to do i have look over this whole section but not all of my questions were answered. I am looking for a tdi everywere and havnt reall seen much.not many tdi engines around here....hmmmm


jeff

[malone]

I have a 2006 Jetta and I want a spare head and camshaft for airflow mods. My plans are fairly aggressive porting, bigger valves, and maybe a little ceramic coating in the exhaust ports to reduce heat losses. I don't know how much a used head is worth but keep me in touch. Maybe I'll offer $600 CAD for a complete head... that's probably a little high but I'm one of the rare MKV PD (engine code BRM) owners who actually want to buy a second, albeit used head I don't need the intake manifold and I probably don't need the valve train either, just the head + cam. Is there any damage to the head?

I don't know if the PD100 BRM rods and crank are stronger than the standard TDI rods. Keep the PD100 intake manifold if it looks better than your TDI intake manifold. The PD130/150 intakes are nicer but it costs a couple hundred US dollars to import.

LOL, you'll kill your A2 transmission sooner or later with the peaky TDI torque. Get a O2A or O2J transmission and look into LSD from www.thescirrocco.com (approx. 950 USD shipped to Canada) if there's room in your budget.

[malone]

As for injector nozzles get Bosio Race 520s from www.kermatdi.com . The race nozzles will flow enough to get your Rabbit into the 13's, with the 12mm pump you have.

In about a month or so new Bosio 7-hole TDI injector nozzles may be released, likely with more flow than the Race nozzles.. but it'll probably cost more so the R520 should be fine for your goals & budget.

You probably should have picked this VNT-22 turbo up earlier.. I was told by Aligator a while ago that it's a good match for the 1.9L TDI (turbo #GT2256V):
http://forums.tdiclub.com/showthread.php?t=165941

He has tuned many TDIs with VNT-20s, VNT-22s, etc. so he speaks from real-world experience.

I'll probably look for a GT2256V for my PD100 TDI next time for about 220-plus bhp, or if the improved head+manifold airflow warrants it, a slightly bigger turbo.

[malone]

BTW I'm sure you already know that, but PD heads CANNOT be used in a mechanical application. They have built-in unit injectors (with no external fuel pump save for a lift pump by the fuel tank) that MUST be electronically controlled for fuel timing, duration, etc.

And PD heads cannot be adapted to use in a VE TDI application either, either mechanical or electronic, so your 12mm pump won't work.

BTW I'm not sure how to retrofit a IDI pump to a TDI as I'm not very familiar with mTDIs (never saw one here yet). Hillfolker or others will have to chime in on that.

[SMOKEYDUB]

thank you for your replies Mark. I would have no use for the head and yes i was aware that i could not do anything with it if i was going the mechanical route. I am for sure going mechanical and will definetly keep in touch on how this whole deal works out. Hopefully someone can tell me how to adapt hopefully i dont have to do much because its a fresh over haul and mod mayb 5 months old. once again its nice to get such a great response

thanks

Jeff

[RabbitJockey]

to put the pump on, just use all the mounts and crap off the mk2 lump, then you use the tdi injector lines, and call it a day

[SMOKEYDUB]

lump is a little harsh....ouch! but thank you very much for the info. I will miss that screaming 1.6 but if i have to trade 2000 rpm for an extra 150- 200 ftlbs and 70 hp then so be it!

Thanks again.

Jeff