whos arguing? im the only one supporting something other than a 383. you're the one who's taking it as a personal shot

relax bud...

 

when you make an argument for running a stock crank in what could be a 550+rwhp setup, that is dangerous. have you ever had a bottom end come apart on you? i did. when a crank breaks and oils down the track while you are full throttle at over 120mph at about the 1000' mark, you get oil under the tires. i was lucky not to wreck the car. when you advise someone to exceed somethings mechanical limits, it can get them hurt.

 

No personal shot felt here. People do what they want to do. I built a 383, you can build a 355. Your choice, just let me know if I have any tail lights out will ya?

What I DO have a problem with is misinformation. Some people on here take what they read as gospel, no mater the source. And a LOT of people on here spout out numbers for this and that when in fact they have never done anything more than read about what others have DONE with this motor and that set of heads and that guys port work or this guys cam. After years and years of this, it gets on my nerves. I don't post on things I have no first hand knowledge of. If I haven't done it, then I don't consider myself informed enough to even have an opinion on it. And I try to make that pretty clear in what I post about.

Dave C.

 

a stock crank can handle his 400-450rwhp. cmon now...

 

this is the internet. i speak on subjects that i know about and dont speak on those i know nothing about. ive been researching my 355 rebuild for quite awhile now and everything ive stated you can take to the bank.

its peoples choice to believe you, or me for that matter. thats the wondrous thing about the internet...

 

it wont handle 550rwhp for long tho, especially if there is detonation present from nitrous. lets say he builds a h/c 355 with a stock crank and it makes 400rwhp. fine, then you put 175 shot on it and detonates in high gear on him while going down the track. the crank breaks, pieces of the crank and or rods puncture the oil pan or block, it oils down the tires and his car gets sideways and hits the wall. you see where im going?

in the first post it said he was going to run 175 shot, that should immediatly eliminate a stock crank from the running. i wouldnt even run a scat 9000 because its not that much stronger then stock. and yes, a stock cast crank will hold 450rwhp, but it was only designed to hold about 400 flywheel for sustained periods. you cant judge something by its absolute max threshold, for it to be reliable it has to operate under its maximum load capacity.

 

true. it wont last long if he sees detonation with that shot. detonation can me minimized with the setup IF it was build correctly to begin with. nice quench with the pistons against the walls to minimize oil loss...

 

i wasnt taking into effect his n2o shot.

 

bad gas, a hair too much timing, someone boxes a sparkplug wrong and you get one thats a heat range to hot on accident, a fuel pump takes a dump, a piece of carbon on the piston from running pump gas that is glowing hot, a sticky fuel solenoid......the list of things that can cause detonation with a poweradder goes on and on. thats the reason i have a rotating assembly sitting here thatll take over 1000hp even tho im only going to make about 650rwhp on the bottle.

 

a scat 9000 is more than adequate for this application.

I would have gone for the 383 but it introduces some variables some dont like. also on stock head castings, it might be too much to let it rev well which some want. you may have a greater displacement but if the air cant get to it, you have a lower VE.

the setup looks great in my opinion. great compression ratio, good heads etc.

dont worry about detonation. some people talk without expierence. Just get a very good tune. they make systems that pull timing when you spray. justa bout everyone does.

Nitrous loves high compression.

Our twin turbo race motor makes over 750hp on a twin turbo 11.5:1 compression motor. its called tuning. and its not race fuel either.

 

directly from scats own catalog, pg 12

how much rear wheel, how big is the motor and how much boost? cause im guessing the motor is big and the boost level is low. you are right, just run a stock crank, put a 175 shot of nitrous on it with over 12:1 compression on pump gas. let me know what happens

 

another aspect i dont like about the 3.75 stroke is the rod angle.. cylinder wall loads and so on and so forth.. like a said before i just really like the "oh it just a 355 thing."lol.. plus the heads would hold back the cubes and the whole efficient air pump theory would go to ****..lol..

also i am running the 175 shot on the current 150,000 mile motor and she doesnt cough a tick.. i have the jets tuned pretty good.. so as far as detonation is concerned i shouldnt have too much to worry about.. i plan on running a few more saftey switches ie fuel pressure and rpm window switch.. other wise it will be fine..

and with the scat 9000 me and the machine shop are going to have a discussion today and i will let them do the final deciding.. if they are still going to guarantee it then thats their call you know?

every one agree to about 550rwhp? think the cam shaft is a pretty good choice? are the 30# injectors going to be enough? or should i try some 36#?

 

the rod angle isnt as big of a deal as you might think. the pistons are still tall enough that they are stable so they dont rock around at BDC. once you go above a 3.75 is where you start having piston stability issues/scuffing issues. we generally have to freshen the 396s every 50K miles. but i know of several 5.7" rod 383s with over 100K on them. the sidewall loading isnt a big deal on the 3.75", especially if you go with a 6" rod. personally, i like going with the shorter rod over the longer rod. what you give up in sidewall loading you makeup for at BDC.

the difference now and when you have heads/cam is that the power threshold of the rotating assembly is going to be reached. you are going to over 12:1 compression, on nitrous with pump gas in the tank i would most certainly keep an eye on detonation.

if you are comfortable with the machine shop then by all means, go for it. since your running a wet kit, and the compression is so high, id go with a 32-36lb injector. i dont know where everyone got the heads hold back the cubes thing, or when people started thinking you couldnt rev a stroker motor as high as a stock stroke setup, but ok. most of these heads are flowing over 270cfm and that exceeds the target flow needed to support the bigger stroke. its not like were talking about using heads that only flow 215cfm.

 

with a 550rwhp setup, id say go with 36-42# injectors. also depends on what heads you get.

 

Yeah... extra torque.. extra horsepower...better driveability with a larger cam.. who the fu*k would want that?

That's almost as stupid as saying that not everyone wants a big-tittied blonde to shred their clothes off and molest them.

Mike