SteveG75

According to me, no. According to my wife, yes.

Honestly, she liked my car with the SBC a lot. With the 496 BBC, not as much.

As for the OP's question, my 496 with EFI, T-56 manual, and 12 bolt rear (3.73) made 413 rwhp/437 rear wheel torque on the chassis dyno. It will pull to 6200 rpm easily (but is choked a bit above 5500 rpm (sidepipes with stock STS baffles)).

I can easily light up the tires in first gear by just rolling into the throttle at any speed (M/T Sportsman ST 255/60R15). I can get rubber on both the 1-2 and 2-3 shifts if I really want to.

Honestly, this is more than enough for me and plenty fun. I don't want to break parts. I just want to enjoy the car at this point.

OldCarBum

Thank you all,
This is the type of feedback I was looking for. My last build I went a little crazy on the hp and I was sorry because I always had to be careful with the throttle or the rear end would break loose. It was a cool ride but you always had to be mindful of what a slight bit of throttle would do.

SteveG75

Your welcome.

Honestly, if I just roll into it in 2nd or 3rd, the car just squats at the rear and pulls like a locomotive. Great when you see that gap in traffic. Like I said, I really have to work to get it to break loose on shifts. That is fine by me since I don't like breaking parts anymore.

pauldana

I had this question... I run a 650 hp sbc gen 1.. I run over 525 hp and over 540tq at the rear wheels. My working RMP range is from 2000-6500+ rpm. at 2000 rpm I come in a 400lbs tq at rear wheels. I run a TKO600 and a super 10 rear. At this power level, you will wipe out the T-10 trans, and the stock rear end, over and over again.. if you do not, then you do not have that power.. at 70mph, in 3rd gear on the freeway, all I have to do is mash down on the gas and I lay a sustained burn out down the freeway. This is with 190 tread ware tires on 10" rims.

1st 2nd and 3rd the rear tires have no ability to keep locked... rolling start or not... push on the gas, rubber starts burning 1-2-3.... 4th and 5th hold.

I made the engine able to handle about 1500 hp. (Callies Dragon slayer crank for starters)

But again, if you are not taking out stock transmissions and rear ends, you are NOT putting out over 350-400hp at the rear wheels.. if you were these parts will not hold up.. went through 3 stock rear ends and 2 t-10 transmissions with my little 383 500hp engine.. until you can show a real rear wheel dyno, its just bs guessing...

I race track, road race, and unless I run slicks, this is as much power as my 3000lb 650hp 79 Vette can handle. More power just spins wheels more than I already do.



ps... its NOT just the peek hp you should be looking for, you should look for a usable power band... a good 650 hp 3000lb car will rip a 800hp 3000lb car if the power band is nothing more than a peek to get there... thus very narrow power band... to be able to work from 2000-6500+ is amazing.

Kacyc3

If you havent purchased the tranny already look at other vendors for it. Of the 3 trannys Ive encoutered from them 1 was good out of the box and didnt need to be sent back. They were all 700r4s but still not a good ratio.

cv67

Those are awful strong #s for a HR cammed 427sbc Paul

Id like to run ya sometime just to see how my 383 stacks up out of curiosity. Never been dynoed

pauldana

Got the Dyno to back it up:-)
And the track days..
remember we have 5 corvettes. All see the track, all have some simple to some serious mods.... now... as far as fastest goes it breaks down this way.. 79 C3, then the 427 C5 guldstrand then the C6 ZO6, then the C4 398 rwhp, then the C5:-)

My build thread:
I have well over 10,000$ in the engine... I think the crank alone was around $2,800
https://www.corvetteforum.com/forums...ort-block.html

Your here in socal... I run with the Valley guys at times.... I do NOT get gapped in the canyons ... ask any of them what they got to say about that .... :-)

71VetteLover

It's too much when parts start to break.

v2racing

Paul's 427 is for real. We watched it unfold here on the forum.

1.52 horse per cube is not hard to believe. Seen more many times. I've seen street 406's make 650 horse, but at a higher rpm than a 427 and not as much torque of course, but still, very doable. It's all about combination and Paul has a good combination of parts. Calling out a very strong 427 SBC with a 383 is probably not a very good idea.

I've not dynoed my 406, but I've built and dynoed enough motors to ballpark it in excess of 600 hp.


Mike

2airtime2

420hp/440 ft lbs...anything more than that and you are just bragging.

OldCarBum

I just noticed you are running an Art Carr 700R4. How do you like it and how has it held up for you. I'm looking at picking up my o.d. trans from him.
I ran a 408 sbf in my factory five 33 hot rod and it turned over 600 hp. It was too much motor for a 2200 lb car.

v2racing

I actually bought the Art Carr 700R4 from George, gkull. He ran it for several years and I ran it for about 4000 miles behind my 406 when it was in my 80 Vette. It is supposed to be built to handle 850 HP. It's been solid as a rock.

George did burn the clutch out of the lockup torque converter by running it locked at WOT in high gear. I had Art Carr rebuild the converter.

Mike

pauldana

George is another racer here on the forum, and along with V2, 63mako and little mouse, you can believe in these guys... and there are about maybe 6 others here as well...

OldCarBum

I listen and quickly learned who knows and who blows on the forum.
We probably passed one another through the Malibu canyons at one point or another.

71VetteLover

Ditto.

tracdogg2

Before you start buying parts for the rear end, figure out your gear ratio's first. A 12 bolt is not much more money that a fully built 10 bolt like Paul's. Also figure on better spindles and going thru the trailing arms.
Mike

Patro46

I'm a little over 700 hp. This said, what Bashcraft said^^^^

Patro46

Nope....

jb78L-82

Paul's SBC 427 would absolutely smoke a 383...hands down! Any 383 is in the built 355 category in terms of performance and HP..NOT in the 406/427 league even remotely..............

jb78L-82

On the street in a C3, about 450-500 Gross HP is probably tops for useable HP...TQ about 425-450 ftlbs