Its all about the longevety. Tune is a given, and is assumed, otherwise all bets are off.

I ran between 420 and 480 at the wheels for 4.5 years and 41,000 miles. Just in the last month or two, I've noticed significant oil blowby. The rings are probably gone. But then again, the trans is making some noises, and the 10 bolt is on borrowed time. These are things that are almost inevitable. Plan on it. Frankly, I'm surprised it lasted this long.

Ask the same people the same question after 4yrs/40,000 in boost, and you're going to see a lot of forged boost pistons, and maybe a 12 bolt or two.

Trucks are a different story. Lower compression ratio is a big advantage. Your power is a good testiment for the design of the rest of the engine. I'll most likely re-use the crank and rods.

 

I would say 600hp for a Turbo and 530 for a supercharger(belt drag)

My car is tuned for 500hp and has lived a year with hard abuse.Of coarse it hit's 500hp at 5000rpm and flatlines to 6500rpm with the tuning I did

 

Great tread guys keep up the good work here giving the public what they need to know! Interesting really how much some of you are making out there on the stock pieces, makes the U.S. stuff look that much better!!

-Bryan

 

What do you guys think will bust a 370" iron block with a stock crank, forged rods, and forged pistons. AFR/All Pro heads for their thick deck also.

 

just my $.02, i think that motor is good for over 1000rwhp.

 

Woohoo, I hope so.

 

I would like to see a poll of what power finally did your engine in, how long at that level and what was teh cause? It seems that our components usually fail because of poor tuning, or other factors that cause the failure, not outright breakage from too much power.

 

Ive seen a nitrous "cam only" 346 make 650.

Its currently the fastest and quickest cam only power adder car and has the "record" for the fastest SI power adder time.

The secret is timing,plugs and a/f...and distribution.....come to think of it...the secret is everything working together..

The car stock internal made right at 600rwhp then scattered the motor on the dyno.
The cause ended up being the 7 and 8 pistons blew apart...apprently they get more then the rest of the motor when spraying (250 total)through the tb.

The stock motor (completely stock internal)lasted around 100 passes and 40+ duno runs making 500-550.

 

Most people know about mine, it was nitrous not boost, and DID have forged pistons, but with stock crank, rods and pistons I made 600 RHWP and went 9.80's, we eventually made 696 RWHP and NEVER hurt the engine, however, we did kill everything past the rear of the crankshaft.

 

I voted 500-533rw before but have only seen 478rw so far on my TA because come to find out my trannys bands were burnt up etc etc during the dyno pulls which i was told caused the nitrous to keep cutting in and out hence the graph being all eratic but i believe since my trans is fixed now that the 100-125shot should get me over 500rw, hope so at least. I'll find out this upcoming thursday and then post my results in the dyno section late thurs nite or friday

 

Since almost everyone replying to this thread should have long ago maxed out their maf's, I have to ask this. I have no convenient local dyno, so I don't have solid numbers on anything, but my wastegate open line blew off during testing the other night, resulting in an overboost conditon. I maxed out my maf at 3900 rpm in 3rd gear. I never want to try this again, but I ws wondering if anyone knew what HP or torque this would equate to in a '04 GTO?

 

I am shooting for Apx 525RWHP in my upcomming setup! This will be in a daily driver

(Before anyone flames me... I liked the poll and decided to breath new life into it!)

 

I posted this before but...

572rw, head/cam fuel setup, 50#inj and a cartek clutch.
Been beating the snot out of it when ever I can. Drive it to work all the time when it’s not raining. Change the oil every 3000 and have not yet even checked the plugs.
Incon Twin Turbo – Stock bottom end and 10,500mi boosted with 28,500mi total on the clock.
And a….. VERY HAPPY!

 

My GTO is making 551rwhp stock bottom end at about 8.5psi with a 224/228 cam

 

I voted, 648rwhp. But thats with N20.

 

This isnt a N20 poll.

 

Actually, this poll was started to see what the typical bounds of the stock bottom are... if it's been accurately measured, I'd like to know the numbers. I don't care if it was blown, turbo'd, NA, nitrous, whatever... I posted it here in FI section to try to capture more of the higher HP people.

As an add-on, though, I think quite a few of us are curious about the point at which failure has occurred on setups that were very carefully tuned.

Keep posting your comments, everyone...

 

Sir, as I do know that you have vast experience in your field, do you really believe that 700+ RWHP on the Stock bottom end is reliably feasible? That to me seems to be on the bleeding edge. The stock crank is only rated to 550 at the extream high side.

Just curious of your thougts, not trying to start anything.

 

what size pully are you running?

 

on a boosted set up(not high reving) i dont think the rods or crank will have any problem living at 700rwhp for a long time. i dont know how long the pistons would last, i killed my 6.0 motor with a nitrous misshap, before it died i probably had a couple hundred 1/4 mile runs on it at over 600rwhp(thru a 4l80e and tcase so close to 700rwhp in a stick car?). i don't have "vast" experience but the experience i have sugests these things are easy to kill if your tune is off and hard to kill if you play it safe and watch for knock.