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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Power Enhancements

TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old May 9th, 2011, 07:03   #16
racerxtdi
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If you have to ask you cant afford it!!!

Its a joke!
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Old May 9th, 2011, 13:42   #17
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I believe the computer needs reprogramed for the 11mm pump.
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Old May 9th, 2011, 17:10   #18
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Its a hard game to reprogram nicely for 11mm.
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Old May 9th, 2011, 17:43   #19
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What about a lift pump? I've read here that an in-tank lift pump will be needed at some point to make big hp in an ALH. Would a 10mm pump with a LP be better than a 11mm with no LP? I ask because I have an ALH with 520PP nozzles and custom Kerma tune. I haven't dyno'ed it yet, but I'm convinced that I'm putting down over 140WHP, easy. Next step will probably be a beefy clutch, 17/22, add'l SMIC, and bigger pumps, if needed.
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Old May 10th, 2011, 02:33   #20
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Same question - when is the moment that the lift pump becomes a "must have"? Larger IQs or other?
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Old May 10th, 2011, 15:15   #21
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Dont know my exact figures, but with vnt17 overbore, porting pp764s i keep a mk 5 golf r32 fsi in check, aka i keep up with him in an uphill straight, oh and the r32 is dsg.

But engine is underfuelled aboqve 3500 rpm.

Upgrading to 11 mm now.
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Old May 10th, 2011, 15:46   #22
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From what I have gathered the LP is a great add-on if you consistently run high rpm's and really need the extra pull of fuel. Many still run both sizes of IP's without issues because we don't push to those levels. YMMV of course...
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Old May 10th, 2011, 18:26   #23
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You will need a lift pump once you are heavily modified.... I've seen dynos where 190whp was achieved but the entire power curve just fell off at like 3800rpm because there was no in-tank lift pump.

Under heavy load, the rotary pump needs the assistance of that lift pump or it simply won't be able to get the fuel fast enough. That same 190whp TDI would have done over 200whp had a lift pump been installed and the power didn't fall off at 3800rpm. It would have pulled much harder to 5500rpm.

That 190whp Jetta was a 99.5 and had RC5, 11mm, FMIC, W/M injection, 3" exhaust, ported head, 17/22 turbo, VR6 airbox, 3" OMI, and the rods, pistons, and cam were stock.
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Old May 10th, 2011, 18:39   #24
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I put lift pumps on both my jetta's. The 99.5 is modded pretty well, it helps the top end out a bit, but it also should help with longevity of a expensive IP, starving and cavitating isn't a healthy thing for the IP. The stock 03 was sucking air in the summertime, after a few different attempts to fix it, i had it running well until a cold snap in winter. The fuel never jelled with PS in it, but it died from sucking air with added shrinkage of the plastic lines and o rings.

Now the stock one is bullet proof in the winter since i always run PS in the colder months. Its $200 and 3-4 hours of work, but how much is another IP? Or whats it worth to have a unhappy woman when the 03 puked at 0 degrees out.
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Old May 10th, 2011, 19:37   #25
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The 11mm is problematic over 5400 rpm from a cavitation standpoint. Kerma made 254whp on a clapped out 10mm pump...
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Old May 10th, 2011, 20:06   #26
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Quote:
Originally Posted by Pcar993 View Post
180whp with 10mm pump, vnt17, R520 injectors, PD150 intake manifold, eurojet2 FMIC, no cat, no muffler, stock size exhaust piping, Kerma/aligator tune.

ive seen the you tube video that's good power
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Old January 19th, 2015, 11:05   #27
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OK, 200 hp can be achieved with both stock 10mm or upgraded 11mm pump. What are the differences? more smoke on 10mm head? or less low end powa? Could someone clear the fog on this thread?
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Old January 19th, 2015, 19:13   #28
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Stock 10 mm pump with OE fuel filter and stock fuel lines, i.e. regular points of restriction. In order to burn the fuel to make the power, I was happily convinced to go with a GTB1756. I am currently "out of fuel" when asking for more fuel than 25 psi of air can burn at around 4000 RPM, and though the pump doesn't fall on its face it's response instead rolls off when I push the pedal further. However, I have an air leak at the rubber-hose-to-clear-fuel-line so it's possible this is augmenting the condition.

That said, before the rebuild, on the base tune about 7 revisions ago and turbo adjustments and port matching et al, my B4 did 195 whp on a dynojet a little more than 2 years ago. I assume its doing better that that now, but have a few more important things than getting back on a dyno.

Hope this helps.
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Old January 19th, 2015, 23:49   #29
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Quote:
Originally Posted by Digital Corpus View Post
Stock 10 mm pump with OE fuel filter and stock fuel lines, i.e. regular points of restriction. In order to burn the fuel to make the power, I was happily convinced to go with a GTB1756. I am currently "out of fuel" when asking for more fuel than 25 psi of air can burn at around 4000 RPM, and though the pump doesn't fall on its face it's response instead rolls off when I push the pedal further. However, I have an air leak at the rubber-hose-to-clear-fuel-line so it's possible this is augmenting the condition.

That said, before the rebuild, on the base tune about 7 revisions ago and turbo adjustments and port matching et al, my B4 did 195 whp on a dynojet a little more than 2 years ago. I assume its doing better that that now, but have a few more important things than getting back on a dyno.

Hope this helps.
Do u have smoke before boost builds up or even after? What rpm does boost kick in? I still wanna clear out is the differences between 200 hp with 10mm pump and 11mm pump. There must be downsizes and advantages to both versions.

Last edited by raidaru; January 19th, 2015 at 23:54. Reason: forgot sth
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Old January 20th, 2015, 00:41   #30
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A puff of moderate smoke @ ~2100 RPM, which lasts to about 2400. Clear from 2500 on. This is on a cool night, ~15 ˚C, with my tiny stock intercooler.
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