I don't see a huge discrepancy between the numbers the superstrokers are putting out vs. some of the newer 388+ci all bore setups both for peak power and under the curve.

Is this due to bottlenecks at the intake/heads?

If so, could intake improvements like the new LSX intake should widen the gap a bit between the two?

 

First of all there are not that many super strokers and second most of them are sporting smaller cams than the 388ci All Bore you are talking about. One 388ci All Bore with a dyno over 500rwhp is not the norm. Actually, how many 388ci's out there? I know of one 397ci.

 

388 here, over 500 rwhp with a 230/236 cam

Now as far as superstroker making around the same HP as an all bore, a 388 is a 4.125 bore with astock 3.622 stroke, a 427 is a 4.125 bore with a 4" stroke. So the only difference between the 2 is the longer stroke. The stroke is great for torque but Id don't think it gives any more HP, MTI had a 427 that put out 501 rwhp, 501 rwtq. A little less hp than mine but much more torque with is better for the track. But it also depends on how radical the setup you are looking for, Pain did 600rwhp n/a I believe with a solid roller 422 with a custom intake and a high compression.

 

There is no such thing as increasing TQ without increasing HP since HP is a direct calculation of TQ and RPM. Sure, you can increase TQ at one RPM without increasing HP at another RPM by keeping the TQ the same at the other RPM.

Dyno a 388 making 500 RWHP and a 434 making 500 RWHP and you'll see that the larger CI engine is making alot more power across the dynosheet. Sure, the peaks will be the same but we don't drive these things at our peak HP RPM all the time do we?

Yes, the intakes have been much more of a limiting factor for the larger CI engines.

 

Colonel nailed it perfectly. I'm glad you put the TQ/HP direct relationship down, too. Most people negate that very important point. Without one of them you couldn't have the other

 

I have never been in a 388ci or 397ci All Bore, but Futral gave me a ride in a 434ci Solid Roller that was SICK!!!!! The car actually felt like it was floating and the nose was up in the air. I swear Allan had to put his head out of the window to see where he was going. I had a hard time leaning forward when he was on it. That motor in a Z06 would be insane.. When I got back in my car it felt like a strong four banger compared to the 434ci. I made like 410rwhp/385rwtq back then. That 434ci made 140rwhp/125rwtq more than my car and it felt like it. The kicker is Allan said the car could be stronger, but the customer wanted a mild 434ci Solid Roller setup for daily driving. I would love to find out what a WILD 434ci Solid Roller setup would do..

 

I know one too, Trahnzam AKA Nick Gette had an all bore 397ci built by Futral...the last time I talked to him it was making around 530rwhp/510rwtq I believe...

 

It was actually making 517rwhp/490rwtq. I have not seen Nick on this board in a while. Actually I have not seen him on AOL IM in a long time. He must be blocking me..

 

Yeah, I'm getting blocked too I think because he still owes me $50

He told me he was in the process of selling the car- looking to get a Z06. I remember him saying some "new mods" got him up to 530rwhp

 

He must have gotten the Electric Water Pump he was talking about.

 

The stroke of a motor has much less to do with the peak horsepower output than the bore, heads, intake, whatever. This is particularly true if you are restricted for airflow (like colonel said) changing the stroke will just move the torque band higher or lower, with little to no change in peak hp.

If you are breathing through an intake that can only make 500 or so hp (as it seems everyone is) then it doesn't matter what you have underneath. You could build a huge motor that makes 1000 ft/lbs, but it would be limited to 500 hp and start to drop off after 2800 RPM or so because of the airflow restriction. A certain CFM can only supply a certain HP figure.

 

[QUOTE]388 here, over 500 rwhp with a 230/236 cam

I thought that you had a 244 250 on a 114 lsa.

 

All bore motors have the benefit of a higher revving capability, for a given rpm a stroker motor will have a higher piston speed than the all bore motor. Also increasing the bore is beneficial to flow on the heads as they unshroud the valve further away from the cylinder wall, and allow you to running a bigger valve, though to work properly the heads would have to have the chambers reworked to take advantage of the larger bore. I also think if you look at what kind of people buy each setup it helps, to see the real diffenece you would have to compare the same setup(heads cam) on each motor. Most people buying an all bore are going to be more interested in making highend power going to a bigger cam, while the people who would buy a stroker are probably more interested in low end torque and driveablity so you're probably not gonna see as wild a setup.

 

500rwhp+ all bores (no stroke) are pretty rare.

I have seen a number of superstrokers do 475-525rwhp/480-550rwtq so to me they are consistently making more power. With bigger intakes, throttlebodies, and headers you will see more 550rwhp+ superstrokers in 2004.

 

Nah, Nick is not on AOL because of school. Last I talked to him, he was taking 21 hours, and playing soccer on top of that!

 

[QUOTE=strokedls1]Yes, that was the original cam that I was going to go with. But Mark @ AAP decided to go with a smaller cam for streetability purposes, after he passed away I had to call Cam Motion (where AAP got his cams) and got the cam card for my car, it was and always was a 230/236 .595/598 114 LSA; like I've said before I think people should look to getting better heads for power rather than bigger cams.

 

I'll take a little less peak torque and some power under the curve for $4k less and more reliability anyday

And Colonel, you of all people should know that with the right gearing/convertor combo you can stay within that powerband pretty well.

 

Tell me why going to a larger cam I didnt gain any more torque but gained 35 rwhp. I went from a 224/224/581 112 cam to a 237/242 595 114 cam and better heads and an electric water pump and only gained peak hp. All of it was above 4500 rpms where it took off.

 

21 hours!!!! 12-18 hours is full-time where I live. That's insane. No wonder I do not see him online..

 

I took 20 once and I thought I was going to die. Wasnt Nick gonna put that motor in his RX7?