frankenstein level 4 turbo

[98_tsi_awd]

so i just picked up a frankenstein level 4 turbo and got a few questions..i was told its equivalant to a 20g maybe a little bit bigger is that true?..what supporting mods wil i need to run this? i already have the walbro fuel pump and injectors but i was told my 550cc's wont supply enough to run the turbo? im getting a tial 38mm external wastegate....id like to run 20psi if that helps any on telling what i might need to go with it.

 

[Chaosweaver]

550s are more than enough for 20 PSI of boost. As for the turbo, I'm not sure if its equivalent to a 20G, I'll try to do some research and see what I come up with.

As for the supporting mods, your wally and injectors will be enough, just need to have a good tune and make sure you have a front mount, anything above 16 pounds of boost on a side mount may cause detonation.

 

[ziggo0]

You will want at least 650's to give you some flexibility, or something towards 1000's for e85 which would be safer & funner.

 

[JusMX141]

550s are more than enough for 20 PSI of boost.

Not exactly.

The Frank L4 has the potential to generate over 50 lb/min of airflow; that's roughly 6 lb/min more (at peak) than a standard 20G.

I wouldn't exceed 16-17psi with 550's and a Frank L4; and if that's all the boost you're going to run, you need a smaller turbo. The L4's 60-trim Garrett compressor likes boost near or above 25psi.

 

[Chaosweaver]

Not exactly.

The Frank L4 has the potential to generate over 50 lb/min of airflow; that's roughly 6 lb/min more (at peak) than a standard 20G.

I wouldn't exceed 16-17psi with 550's and a Frank L4; and if that's all the boost you're going to run, you need a smaller turbo. The L4's 60-trim Garrett compressor likes boost near or above 25psi.

Hmmmm... Wasn't really taking a higher airflow into consideration. Would 20PSI still be possible and keep in the safe zone? I mean, I don't want him to blow his engine by any means, just a general knowledge question.

 

[JusMX141]

20psi would still be possible but not recommended with 550's unless you can up the fuel pressure a little and play with injector dead time to lower the duty cycle.

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Again, the OP needs to realize that if he wants to run 20psi on 550's he needs an Evo III 16G, not a Frank L4 20G. This is a hybrid turbo that is designed for big airflow and is not user-friendly by any means. Full boost will be around 4000-4300, and it will be difficult to keep in the powerband between shifts unless you shift very aggressively.

The L4 has a very smooth hit in comparison to a 16G; it's not as responsive as a 16G (especially with cams), and it's going to be 400-600 RPMs laggier than an Evo III. I honestly think you'll be much happier with an Evo III 16G.

 

[xhackerekx]

i have frankenstein turbo and evo 8 560 injectors full boost on 3780 rpm wide band show 10.4 @ 25 psi boost no knock .

 

[98_tsi_awd]

i already have a 16g...i picked this up really cheap and could pass it up....i was told bigger ijectors would be alot better i was thinkin 660 or a little bigger....i wouldnt be against running more boost im just not sure what would be a safe boost to run on my motor with stock internals

 

[JusMX141]

i already have a 16g...i picked this up really cheap and could pass it up....i was told bigger ijectors would be alot better i was thinkin 660 or a little bigger....i wouldnt be against running more boost im just not sure what would be a safe boost to run on my motor with stock internals

Frank L5 on a '95 TSi AWD that belonged to a buddy of mine was out of fuel with FIC650's at around 25psi. This was with a 255 pump rewired.