very true, lesson learned. im still going. i just bought a set of drilled and sloted rotors with break pads for it from seller quickstop!pro off of ebay. these are sweet and you guys should check them out. i got a reallygood deal through there make a offer. saved alot of money. but i will still in the future get the 6 piston front set.

 

Basically this guy would be building the most powerful LT1 383 (without power adder)....ever. Look at a dyno before you pay him Most guys are lucky to get 400 rwhp on a good build.

 

i loaded the top end up, even with stud girdles witch most people dont do because of the valve covers and alternator. (not saying this is why for people who jump to conclusions, just saying i put a little more then the average in my top end for my rev monster) im telling you i know it is putting down well over 400rwhp just from sitting in it, and what happend with the vette. even the second time we raced i pulled 3 car lenghts on him with in what seemed to be 5 seconds at the most before he shut down. so i have a good amount of hp over the 400hp vette. so tell me how much hp would it take to do that. and let me here your stories on how that didnt happen when you werent there. im not getting ill, just curious on what some of you would say about this one.

 

Don't get hung up on what a dyno says...I don't make 400 rwhp but my trap speed suggests otherwise. I don't see why everyone is jumping on you...A stock C6 will run high 12s at 112-114 (on average as I've seen several at my local track) Z06s are a different animal and are viscious from a roll...Saying that its a 400rwhp car from just sitting in it is going to raise eyebrows, though...If you want to dyno it to verify A/F and timing I'd say its a good idea..Then get to a track a post the results...Remember that in general ET is a function of traction while the trap speed is a function of hp...with your set up I wouldn't be happy unless I was crossing the traps at at least 120 mph...

--Alan

 

Nice kill bro, i'm sure it was a regular C6 tho-one thing for sure, if you see one that has wide rear fenders/tires, and side scoops that's a Z06. You'll DEFINATELY have to sack up-since dudes are running 10's with just headders and a tune.

I just couldn't justify the extra 35 grand!

 

i would love to race one just to see what would happen. i should be going against a viper really soon. my freind should have his doctors viper tomorrow to do the breaks. we will see if it happens. if i lose thats fine. i just want to see where i stand against the big dogs becuase that was my goal was to beat a stock viper/z06 when i started the 383 build. i didnt think that would be to hard to do. if there getting 500-515hp at the crank and a 383 build with all the supporting mods, and bolt ons can get 420 to 500rwhp at the most should beat a viper/z06. if not i know i will be getting charged in the near future. then they wouldnt stand a chance.

 

I don't question the race if you're referring to me.....I was pointing out that it's not possible to put down 500 rwhp without a power adder on a 383 LT1. At least not running gasoline. Trust me nick, even with all the goodies and a bad *** tune, you should consider yourself lucky to get 400-425 rwhp. You're setting yourself up to be dissappointed if you're looking for more than that.

 

I put down 433/465 @ the wheels with a TH-400, high stall nitrous converter, 33 spline Moser 12 bolt w/ c-clip elims, MT ET's, heavy nitrous driveshaft....tires were rubbing on the dyno hard...had an exhaust leak....rr's need adjusting....a little more tuning.....on 93 octane.

So I can probably get another 30 rwhp out of the car.....so you have to wonder how much grunt I would have if I had a 6 speed in the car? A 383 with my setup would lose a little, but not much and I bet he would hit 500 rwhp.

 

No, what I was getting at was that beating a stock new Corvette is not a huge deal, imho...Making 500rwhp is a huge deal n/a, and I was just letting him know that dyno sheets don't win races..Dynos are a great tuning tool, but the track trap speed is the final judge of an engine's true output...I've out mph'd lots of folks waving big dyno numbers in my face...I see lots of dyno numbers in the low to mid 400s rwhp around here, but the traps are only 115-118 mph and to me that doesn't add up...I make 385 rwhp and trap a tick below 120...

--Alan

 

ive seen some posts on here before where they had dynoed in the 460-480rwhp range on a 383 setup. i know some are close to that with a 355 setup. but i agree totally. and i never said i had 500rwhp. i said around 500rwhp. i would love to hit 480rwhp. and i also have racing gas here. i run most of the time 100octane but they do have it a lot higher where you can only use a gas can.(wasnt using it at time of race) im looking for a driveshaft now then i will hit the local track, maybe bristol speedway

 

That's a whole lot of speculation there.

 

460 rwhp on a 355? That's the great thing about dyno's.....you can make them say whatever you want with the right correction factor.

 

yellavette...if they have the right parts why not?



That dyno is with:
Tires rubbing the fender wells
Exhaust gasket leak on the driver's side
Roller rockers need valve adjustment
Take another look at my exhaust system(no h-pipe or x-pipe plumbed in yet)
Take another round of playing with timing.
Let the motor break in.

Take the numbers I am making right now....not the numbers I am figuring it will make next time (460 rwhp) and realize that I am looking at around a 30% drivetrain loss? A 6 speed would probably be around 15% drivetrain loss.

Would a 383" make less power than a 396" given equal items...possibly, but if you took my parts and put them ona 383", a 6 speed and a 12 bolt, I bet it would surprise you.

Something else...I built my motor for nitrous...I gapped my rings for it...gapped my plugs for it...I built my drivetrain around spraying a 250 shot off the line (hence the nitrous converter).....hence the power eating parts.

 

I agree. Peak numbers are just for bragging. I've owned a supra and a corvette that both made ~450 rwhp. Between the 2 cars I probably made 40 passes. The vette was consistently .8-1 sec. quicker and 5-7 mph faster. The Supra felt faster during daily driving because of it's peaky curve, but it didn't translate to good times. It's all about area under the curve and power:weight ratio.

 

I don't know why not. But no one has really done it. I've been building/racing LT1's since I got my first vette in 1994. I hang out with a couple different vette groups and know probably 60-70 people in the SE with L98/LT1 cars. No one without a power adder on pump gas is making that kind of power besides a few 396 guys in the mid 400's. The few people that I've discussed this thread with don't think it's possible either. I'd love to be proven wrong though. Any links would be cool.

Nice numbers btw.