Papi4baby

iTrader: (1)

AGP has/had a 10 north of 500 with a stock block i believe.

MIGHTYMOUSE1

iTrader: (7)

well everyone is getting closer to my expextations on the evo x sleeves i am expecting 650 to 700

Noize

iTrader: (24)

I think anything over 400whp Dynojet is really iffy.

FWIW, there have been a lot more than two failures.

Gexxer

iTrader: (1)

AGP has been well over 500 WHP for a very long time on their stock block. I can't quote exact HP numbers or time frame, but if they want to chime in they can.

Evolution IVGSR

iTrader: (42)

I think AMS already has one well over 500WHP on stock motor.

BlackTrack

iTrader: (25)

I'd have to disagree with that.

With the safe tune on my car from Chris @ AMS, I've been racing with more than 450+ whp and zero issues. I already have 1,850 racing miles on the current setup and 8,600 racing miles on the car overall (100% stock long block).

Noize

iTrader: (24)

I say iffy because I think of it more as a guideline than a rule; check PM for more info.

bbyevo8u

iTrader: (14)

time will only tell, its a new car give it a chance! the engine has only been out for less then two years world wide..

xtremeboost

iTrader: (39)

I would have to say that the limit should be over 600hp with ease on the stock block .

bbyevo8u

iTrader: (14)

^^ but the real question is for how long and how much abuse?!

xtremeboost

iTrader: (39)

I know it hasn't been tested yet but I will have to say well longer than a 4G63 !

bbyevo8u

iTrader: (14)

^^ really why do you say that?? thats a pretty bold statement so ill shoot one back at ya! i'm not knocking the 4b11t at all but i think your wrong

jackygor

iTrader: (9)

A good tune goes a long way!

Bighec

iTrader: (9)

450hp on pump gas as a daily driver is perfectly fine imo. I agree with Frank. I think you need to start worrying around 600hp.

xtremeboost

iTrader: (39)

Thanks for asking . Well , for starters the rods on the 4B11 are beefier then past evos ; the pistons also appear very clearly to be made bigger and cleaner . Speaking for MYSELF - ( our car ) we have been beating the crap out our car since day one !We have hit 40lbs god knows how many times and some of those times its been on pump gas ( by mistake ) . We have about 160 dyno runs , well over 200 hard launches many at 6,500 rpms - with that said it took us 27,000 miles to do any sort of damage to the pistons and it wasn't even that bad - we ran the busted pistons for about 3 months and still manage to run 11.9 many times . I should also add during our runs with bad pistons we also manage to over-rev and bend every exhaust valve - once again we've manage to run 11.9 and 12.0 with bent valves . We have since rebuilt the motor and decided to keep the stock rods , we're doing the valves this coming week if we have time . I know the things we have done to this motor the 4g63 will most likely not take it . I love both boclks but the 4B11 is no joke !


Once again this is my take on it based on what I've seen first hand in our car .