420A 420a underdog pulling 230hp on 5psi dyno proof

[GSTurbo1]

Ok guys so I just bought a gs that has been turbo'd and built none the less. Is 230 hp on 5psi good for the 420a? I have it pushing 15 psi now and is three times a strong it feels... motor is good for a little over twenty and turbo is good for twenty. What do you guys think it is pushing on 15?

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420a Engine
Eagle Rods
JE 8.8:1 Pistons
Cometic Head Gasket
ARP Head Studs

DSM 450cc Injectors
Walbro 255 LPH Fuel Pump
Aeromotive Regulator

Hahn Racecraft Turbo Kit
Hahn 16g Turbo
2 1/4" Downpipe
FMIC

Tuned on Megatune

Here is the chart. The wastegate pressure is 5 PSI, touching on 6 PSI at higher RPM

 

[Stew Pidaso]

I think thats pretty cool. Always been a fan of underdogs. I would upgrade injectors though and get afr gauge if you dont already have so you can make sure youre not going to blow anything up to soon and be the underdog in the dogshed. Anyways, like the project.

 

[GSTurbo1]

Thanks buddy... I have a great working AFR wideband. What size injectors should I bump up to? I don't drive it real hard, unless I have V8 trying to work my turbo lag.

 

[Pipnorcali]

I had to push 16psi to hit 235hp

 

[hybridmike]

The Underdog strikes again, good numbers.

 

[GSTurbo1]

I guess building that motor gave it that power.

I'll let everyone know what it looks like on 15-20 i'm shooting for 300 whp at the least.

 

[TotalEclipse21]

I'm not seeing how you made that much power off of 5 psi when I just finished reading a post about how they made a little bit more power with ~15 psi on a 16g.

 

[GSTurbo1]

Lol. I have no clue but that is straight from the dyno.... everyone else that worked there was shocked too. We did several pulls and this was the average. I'm not complaining by any means, just trying to figure out why it would be pulling this much on wastegate preset.

especially on low compression pistons.