VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: Mk2Fanatic on April 28, 2007, 01:28:58 pm
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So far, what is the highest recorded dyno sheet for an IDI VW diesel? What is the fastest quarter mile time or trap speed? I'm looking for a bar to keep in sight with my project and just wondering what the IDI Elite are making power wise.
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you can do a reliable everyday low 16 second car. 15s or faster is not longer streetable.
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you can do a reliable everyday low 16 second car. 15s or faster is not longer streetable.
Define not streetable.
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overheating leaky and blowing headgaskets weekly :D
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i was doing low 16s with minimal mods in my car... i think low 15s to mid 14s would probably be do able with the right setup in the right car (a mk1 would be the lightest.) i forget what i ran but it was a 16.2 or a 16.3 and all i have is a gay cone filter, 25psi(stuck wastegate.) increased fueling, and the stock down pipe with a 2 1/4" tt gas exhaust with a resonator and muffler. once i get a 1.9 head, a pp down pipe, an intercooler, a clutch that doesn't slip, and more fueling than last time, i think i should be able to hit high 15's pretty easy. but i might join the over heating leaky and headgasket blowing club haha
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my trap speed was 84 mph and i was running out of fuel in 3rd ( i had no pre pump with a 12mm)
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overheating leaky and blowing headgaskets weekly :D
So no one has found a way to get around the "blow-a-headgasket" syndrome yet? Even with lowered compreesion(18:1 or so)?
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i guess not.
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I really would like to go higher than 125-130 whp on a SUMMER daily driver. I have a MB 300td for winter, so I'm not worried about cold starting my 1.6TD. None of the hot rodder tricks work so far( O ringing, Copper head gaskets, Head Studs, reduced compression). Is it boost that causes the leaks or just a natural td power ceiling? If you had more airflow with the same amount of boost, would power go higher or just leads to leaks sooner?
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not sure stuill experimenting. i ran 25 psi dail on a td with a very poor intercooler and a pump with the governor mod and the fuel turned way up (it wa sreliable). Now last year i ran 27 psi on a different engine with a ported and polished 1.6 head and a real good intercooler and i couldnt keep it together.
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i did a 17sec Gtech-quarter with my fiat T2 1,25bar/18psi.
11mm plunger, Garrett T2, pretty smokey becouse of the feul quantity, lda adjusted (no governermod, alltuogh, i shimmed the intermediate but didnt adjusted the preload from the main spring)
the engine have about 19,2:1, intake exhaust etc was stock
the car weight is about 2000-2100pound (900-950kg) excl passengers.
the intercooler was about 1/2 than the stock (yes, it mean smaller than stock!)
Greetz, Benjamin
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My best with 1.6 is 15.06/150km/h
Best I´ve seen with 1.9 is 13.8/something.
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My best with 1.6 is 15.06/150km/h
Best I´ve seen with 1.9 is 13.8/something.
What mods did you do to run a 15.06?
What was done to the 1.9 td that ran a 13.9?
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Only dyno I've had done was 161whp 1 year ago The G-tech 2 years ago was 14.88 @ 98mph.I'm making more power now as I can easialy break the tires loose in the rain in fifth,Butt dyno :lol: problem is that while doing so I can see coolant exit between my hood and fender at a good rate.I removed the resivors deflector so I could see whats going on as I'm driving.I have fineally decided to not depend on my car for daily driving due to its reliablety.The copper HG with studs setup is only part of what needs to be done to keep compression in.I'm getting some work done to my head and lowering the CR to 17.5-18:1 and hopefully it will work.No doubt it will make over 200whp when tuned.
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That's sweet, andy2! :)
I really would like to go higher than 125-130 whp on a SUMMER daily driver. I have a MB 300td for winter, so I'm not worried about cold starting my 1.6TD.
One good way to lower compression is the stage 4 head porting by Passenger, which includes deck modification:
http://vwdiesel.net/phpBB/viewtopic.php?t=7680
(disclaimer: I don't make any money by his sales.. my head was done by him I couldn't believe the airflow gains). Simply using a thicker headgasket is not efficient. I also strongly recommend getting a 1.9TD head, which has larger prechambers than a 1.6TD head.
Upgrading the intake manifold to have more even airflow across 4 cylinders may reduce the chance of headgasket failure. You'll likely produce more efficient power before the headgasket fails. With the stock intake, if one cylinder has more pressure than the other, you're making inefficient power and the high pressure cylinder is more prone to leaking thru the headgasket.
http://vwdiesel.net/phpBB/viewtopic.php?t=7676
I used a OEM PD130 TDI intake manifold in my TD and while it is a big improvement, it wasn't perfect.
Does anyone know what cylinder PSI is 17:1 - 18:1 compression ratio? My guess is 375 PSI but I'm not sure that's correct.
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There was a discussion about head bolts (e.g. ARP, Raceware) at tdiclub.com and a handful of owners saw headgasket leaks after only tens of thousand KMs or miles. And many of these TDIs are not big-power ones either. It could be that they neglected to inspect & re-tighten the head bolts after every xxx km, but some of them are quite experienced TDI mechanics.
They figured that the factory stretch head bolts may be better.
Try o-ringing & factory stretch bolts?? Before o-ringing & head studs.
A 1.9L TDI with 19.5:1 compression holds together just fine at ~200whp and ~350wtq with a stock head and original headbolts. I would not go lower than 18:1 in a TD as VW states that 18:1 is the optimal compression concerning performance. Don't need to deal with bigger cold start hassles at 17.5:1.
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I have a complete 1.9, a 8v gasser intake and the g60 throttle body adapter flange. How much did it cost for PP to mod your 1.9 head?
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never mind on prices, just read the two links.
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are you going to try and gasket match the gasser manifold to the complete different design port of a 1.9?
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are you going to try and gasket match the gasser manifold to the complete different design port of a 1.9?
I've seen it used on 2 different 1.9 diesels - a TD and a TDI. They added a little material to make the manifold have the d shaped ports.
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malone,
Assuming VE=1 and we have no boost, 1 bar atmospheric pressure, the cylinder pressure at TDC in an 18:1 engine would be nearer 57 BAR or 870psi before combustion.
For a 9:1 engine it would be 25 BAR or 370 psi only !!!
Simple formula to use (for ballpark figure) is take the Compression ratio and times to the power of 1.4. This will give you how may times greater the pressure is than the initial pressure in the cylinder.
However, this is the thrmodynamic theory only. Things like valve timing etc change the dynamic compresion ratio. Book states 25 - 27 bars for 18:1 for a compression check.
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has anyone tried larger studs?
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Does the metal HG from a 1.9td help any? I'm replacing the head and I'll be using the 1.9td HG with stock headbolts and planning on at least 25psi.
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i think im going for 13 mm studs this time around and i think the 1.9 steel gasket helps a bit i wouldnt go much over 25 psi if any at all.