Streetability on a 396 stroker with a single plain intake victor E manifold?

I don't want to run more than 11.5:1 cr because I've been told by more performance, combination motorsports and others that any higher cr wouldn't give longevity on pump gas. I've been talking to AI and I'm going with their trickflow LT1 heads in a month or two.

My next question is what cam do you guys reccomend for me and what am I looking at realistically as far as rwhp output.

Let me be clear: I want 500 rwhp n/a but will settle for 470-480 rwhp if it would be streetable.

Most importantly I want to run high 10's in the 1/4 w/ high 120's mph @ about 3600lb race weight and streetability.

If you tell me what I want isn't possible I'll just go FI again.

Thanks,
Justin

 

A LOT!!!!. All joking aside I was going to do a turbo 355 setup which was going to cost much more. I'm not really concerned about the cost. I'm still thinking of building a 355 turbo setup or putting my vortech back on the car. 500rwhp is simple to achieve with FI. I just kind of want to be able to tell people the car 500 rwhp all motor. No big deal if what I want can't be done. Just hoping.

What do you do in the Army? I'm at HAAF.

Justin

 

500 RWHP with an automatic NA and 500 RWHP with a six speed are two totally different animals, I dont think Trick Flow heads are gonna swing it, I know they wont with an automatic, gonna take 320CFM of air AT A MINIMUM to make that number....dont be so worried about static compression of 11.5, be worried about the dynamic compression number...your engine builder will know what that is, stay at or under 9.0 as a rule of thumb.....break out da checkbook.


David

 

Forgot to mention the car is a 6spd.

 

Anything is possible if you have the money, just contact one of the reputable engine builders that lurk around this website, such as Bret with Bauer Racing Engines. I am sure he could give you a few ideas on how to achieve those numbers if you are serious about it. Good luck.

 

are stock 6 speeds able to hold that much power without breaking anything?

 

Short answer: yes

 

Thank you, if the cost to build a N/A setup like I'm talking about is going to cost close to what a turbo setup will I'm going to build the turbo setup without a doubt. Or I'll just build a more realistic 440-450 rwhp 383 and put 150shot wet kit on it.

Thanks for the info,

Justin

 

I dout its going to be very streetable, your going to need a big cam to get 500 rwhp. You could focus more on the head work and cam lift but go tame on the duration. I would shoot for as much as possible with a streetable cam then throw a wet kit at it.

 

you can contact pnykilr.... he has over 500 rwhp na. his name is neal (i think) and he's a very nice guy.

 

I've got a 396 stroked daily driver. It runs mid 11's N/A and next weekend, we hope to run low 10's on a 150 shot. The only problem with my current set up is that I have a TH400 w/4.10 rear, so highway driving is out. I have a 3.70 9" to put in along with some 29" tall tires that should ease highway driving until GM gets its new 6L80E tranny perfected.

 

With 23* LT1 heads, 500 streetable RWHP NA is a tall order. You will need the level best of everything to come close to this.
Taner's car is a pretty good representative of your goals. I think he is running a solid roller 398 with some pretty decent AFR 227's. Its been a while since I saw his numbers, but I think he makes in the range of 475rwhp NA and runs mid/high 10s at around 128 mph.
I'm not sure whether the TFS heads have a large enough port volume to support this kind of power, but I know that the AFR's do. Your choice of a head porter sounds good though, if anyone can get 500rwhp out of a 23* LT1 heads, AI can.
You will also need the best tuning available of course.

 

In the world of LS1's this is a task that could be tackled blindfolded, but with the 23 degree LT1 stuff this becomes more of an obstacle.

As mentioned above, streetable means something different to everyone. My advice would be a Super Victor Intake mated to a set of AFR raised runner heads that have been CNC'd to the absolute limits. The biggest hole doesn't always have the best flow and with your set-up mid lift numbers will be especially critical.

Talking about cams doesn't make too much sense just yet, as we haven't seen the flow numbers from the heads yet. Also I know you mentioned an M6 tranny, but what rear end, gear, size tire, and suspension are on this car?

High 10's N/A has been done without that much power in an M6 car. Look at Taner and his blue Z28. That is a 396 with AFR 227cc heads on it, and the gaps in his application are set-up for the bottle. So I'm sure in a dedicated N/A application there is room for improvement.

Good luck either way, I beleive that you can hit both goals.

 

The turbo setup without a doubt is the way to go, with stock ported heads and intake and say maybe a T-76 would accomplish your goals and then some, spend the money on fuel system and the bottom end, do not skimp here. Also with a six speed, if you plan on racing it on the track..go ahead and pop for some good drivetrain components, because a 500 RWHP 3700lb manual trans car will destroy drivetrain parts the first time it hooks you will find the weak link. I would say a turbo 355 or 383 and a N/A setup to achieve 500 RWHP would probably be comparible in cost, the turbo setup may be slightly higher but you will enjoy the driveability much more with the turbo setup.


David

 

Well I can argue that point... done it with 268cfm. Does 600hp at the flywheel make over 500rwhp? Yeah.

Lot's of headflow is not needed, the more you have the more likely you are to get a more driveable car since you will need less cam to do the job, but 290-300cfm should be more than enough to get that done.

BTW the TrickFlows will do that.

Good advice here... I would probably bring the dynamic down even more than 9:1 for most people because it's the little things that make the difference here.

96vortechSS,

I'm actually finishing up on a 11.5:1 396 with a single plane and a set of ported TFS LT1 heads. Should do over 600hp at the flywheel easily and be a tame street driver. These things cost a little coin to do the right way but it's not that hard to do with a GOOD intake, that's mainly the reason the LT1 is not so easy to get over 500rwhp. I would rather do a 383 or 388 over a 396 to get there.

Bret