The heads are cc'd and valve job permitted, the valve job is where the magic is at. Your paying for knowledge of the cylinder head expert. $3k for stocker heads is a steep number.

 

It never cease's to amaze me how people can reinvent the wheel.. Stock heads flowing well enuff into the 10's ... Makes me wonder why we port the crap out of the stockers with huge lift cams and bump around the 400rwhp mark.. But most of us are not willing too or don't and have the time, or tools (dyno) to tune our car the way these teams do..

I need to start a thread on dynamic comp and quench vs cam intake timing.. My marbles are starting to rattle in my head questions are brewing

 

The subject of dynamic compression is an interesting one. I do think it's worth noting that air density is going to play a pretty big part in 'maximum' safe DCR. It's definitely something worth thinking about and would seem to indicate that, while there may be 'guidelines' there is no blanket answer.

As for LTx going mid-9's, at that point I don't know why you'd care if an LTx or any sbc/bbc is under the hood. Unless you're running an LTx-only class, it really doesn't matter that much. You could obviously build a much more streetable engine with a large (434+ cid) engine than a 383/396 built on the LTx platform.

Not to take away from the accomplishment. Mid-9's is always impressive for a street car.

 

Well if they fit the weight category and can run a sb2.2 setup then they need to show up to the shootout.

 

The automotive world is much bigger then the internet!

Because most of us dont want square lobes on our street cars, and to have to idle at 1.5k to stay running Stock lift does not mean stock duration!

If streetability was not a concern, most of us would choose huge heads with 260+ duration SR's and 5k stalls with 4.11 gears through a TH400. Who cares if it cant make it up a hill from a stop without flooring it?

To the OP and AI - that is an amazingly impressive combo. Have to be willing to go the extra mile in dialing in the tune and suspension, but the results sure look worth it. I can only hope for 10s NA in my "street" car, and that is with pushing the limits of streetability(12.5CR 383, 3600 stall, 3.90s, 240s duration cam, hogged out stock heads...).

Well into the 9's with that relatively tame combo is amazing .

 

If you say so

 

You are absolutely right. Do you know if this is being accomplish with a LT1 block? That's my point.

 

Mine is VERY streetable!

 

I think driving fast car to the track is silly. When you are bending the wheelie bars on the launch, there is a possibility to bend or break something important. Making the drive home, if possible, lame.

I tuned this engine for Ai a few months ago. There is no reason this engine could not be driven on the street. It runs pump gas, idles at 1,100 rpm, and yes it can part throttle drive up hill .
The vast majority of part throttle driving problems are due to poor part throttle tuning.
I will have some videos of the dyno session up soon. I am sure you guys will get a kick out of it.

 

Save some of that magic touch for my new engine.

 

They seem to have a pretty good server, but if you are having trouble viewing the file I'll host it elsewhere.

 

Why......to run all 15 people that show up?

screw that shootout it sucks.

People have no idea, there is alot more to running a car than "the heads flow xxx"

I'm not even going to get into it. most everyone is blind.

Tom knows what he is talking about, been there done that.

And the rule on stocker heads is they have to be 174cc runner now, this is a newer rule.

Great for Rick great for Ai.

If any of you think you are getting the full info from them or that set up then go ahead and buy the exact same stuff and see what happens.

 

I'm not bashing AI at all in fact I am really interested in their products. Driving a fast car to the track is silly?? I think having a fast car you only drive at the track is silly. There is nothing better than having a car you can drive daily and then drive it straight into the water box and rip off a 9-10 second pass. I would love to see what this motor could do in a true street car.

 

thats stupid IMO, kind of like going to the track with no help.....what if something breaks, you flip the car, get killed etc. etc. etc.

At that speed and that type car.....stupid to drive it to the track, stupid to go alone etc.

You really think its smart to drive a 9 sec car around? Like the guy here that had the turbo one he drove to the track and wrecked it at the track on street tires.

 

You talking about the one in KC or the one here? I'm talking about the KC one. ur juzt jealouz cuz u gotz a rayce car, fewl!