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Discussion Starter #1
i have on3 kit with 76mm ball bearing turbo on my 97 cobra. i have a aeromotive stealth 340 in tank pump with 80# injectors. i have been talking to a few tuners and one told me i need to put a t-rex inline pump. what kind of power can i make without the t-rex? if it will cost me alot of power i will get one? it's a stock bottom end so i'm only looking for 8-9# of boost.
 

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What base pressure? These 340's dont really flow all that well real world when they get hot. With 80lb injectors and 40psi base pressure probably support around 550rwhp.
 

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Well, when someone says the "block" will break I interpret that as "shortblock" or "longblock" which includes rotating assembly. That will let go before the pump falls short.
 

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Well, when someone says the "block" will break I interpret that as "shortblock" or "longblock" which includes rotating assembly. That will let go before the pump falls short.
ya cuz those forged piston and forged crank ain't worth a #### are they? lol i have seen those stock short blocks run on 14psi all day long. its called tuning
 

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Pump should do 500-550whp depending on how efficient the motor/turbo combo is
 

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ya cuz those forged piston and forged crank ain't worth a #### are they? lol i have seen those stock short blocks run on 14psi all day long. its called tuning
B head cobra engines only came with a forged crank. The pistons and rods are not.
 

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Discussion Starter #13
will there be any benifits of having the t-rex or i'm good with just the 340? i would hate to leave hp on the table over a $250 in line pump.
 

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will there be any benifits of having the t-rex or i'm good with just the 340? i would hate to leave hp on the table over a $250 in line pump.
I heard the T-Rex pump does not do anything, read on some forum a tuner added it in-line to the system with a boosted 4.6 and it helped 0%
 

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I'd say you'll be fine with that pump, but the injectors are a bit overkill. 60#ers would support what you're looking at no problem.
 

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Discussion Starter #17
i'm just getting it tuned with 340 pump. i also have a snow stage3 kit so that should help with making some more power. as far as the 80# injectors when i bought my kit from chris at pas he said go with 80#. i'm having frank soldridge tune my car and he is great at what he does. i hoping for 550rwhp.
 

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How is he gonna break a teskid block?

Sent from my HTC Sensation 4G using Tapatalk 2
Where does it say teskid? I read stock bottom end
 

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That 340 should out flow the svt pump and I made 526/550 on a single svt pump(I think I did have a bap on it though). I have not pushed a single 340 pump myself but I cannot see how it wouldnt at least be good to 550+. There is a chevy 2500 at the track making mid 600's on a 76 and a single 340 pump

Also 8-9psi really is the threshold for the stock bottom end. I scattered my 99 and destroyed my block at 9.5psi
 
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