I have to have one personally to know that what I said was true?

Please tell me what you disagree with. Certainly not that a lot of power is left on the table running a small cam and stock casting heads or that a 400+ cube motor can take a lot more cam than a ~360-370 cube motor?

 

Are you a tuner as well?

 

A tuner by profession, no, but I've tuned a dozen cars or so.

Would still like to know what you disagree with about my comments on stroker motors.

Maybe I should praise "purpose built" low hp builds?

 

Sounds like a nice build, even though mine is not a DD I'm looking to do something similar for cruising and occasional RR. I already have some nice RPM ported heads and a ported Fast102, but I'll probably pass on the NWTB (how much do you estimate it contributed to your numbers?).

The Cam is also along the same lines I'm thinking of too, especially with CA emissions. Do you have a printout of the Dyno you can share?

 

From what I have learned from speaking with various tuners/shops, I agree with the above statement. Even stock cubed LS motors are being daily driven with decent size cams and not losing much in the way of drivability. A stroker motor should be able to take a good size cam and have similar street manners. (obviously all subjective) Personally when/if I go with a stroker, I'll discuss with my shop about what acceptable street manners are to me and tell them to pick a cam with the highest HP/TQ and the broadest power band that will fit within those parameters. There's no reason to be scared into going small. Tuners are doing amazing things with software these days.

Disclaimer: I have no personal experience but I listen carefully when I inquire about different set ups. I can only hope the shops are giving me accurate information.

With that said, any other stroker numbers?

 

My old stroker was a DD also. My wife gets kinda funny on the wilder side of hotrods. She almost killed me when I left my Stainless Works CBs after my first H/C upgrade on an LS1 about 8 years ago. Anyway, below are the specs on my previous stroker.

LS2 Stroker 6.6, Ported LS3 heads w/ hollow stem valves/926 springs/TI retainers, Ported LS3 intake, VR LS3 cam, Spec Stage III+ clutch, ARH 1 7/8" headers w/ X pipe, 3.90 gears, 6 speed, and TIs

It had an LSL cam @ 231/239, no surging, 800 RPM idle w/ AC on. The dyno is below and made 503/481 at the wheels with nice torque down low and through the RPMs. I now have an LS7 that I am breaking in at this moment. I used the same heads and intake and will probably be about 10 shy of 550 RWHP, but will still be able to take Momma for rides w/o a hassle. Actually, it runs a lot milder than the stroker.



Yep, I agree, throw a 250+ cam, 102 FAST w/ 102 TB, and Charlies' new small bore heads or MAST heads on this stroker and I think you could easily be singing who's your Daddy at 550 RWHP. Remember I had TIs and 3.90 gears also with a mild build and hit 503/481.

Unfortunately, couldn't use that type of build, but would LOVE to have it.
Mike C sends

 

I am running an LS3 Stroker (415ci)

See the sig

 

Most cam only Z06 cars are seeing 530 - 560 RWHP so a 500 HP stroker is not pushing the envelope. Low end torque is fun in traffic, but unless you have a 2800 stall automatic, you aren't trying to go fast if you're hammering the car at 2500 rpm. If I did a stroker I'd want a band of at least 1200 rpm where I made more than 500 RWHP

I'm not bashing anyone's set-up. The Z06 has 427 cubes and pretty good heads from the factory. Everyone has different goals and budgets so if it does what you asked for and paid for, that's great.

 

Plenty of head/cam Zs are going into the 575-580rwhp range and being daily driven.

Others have hit 600rwhp n/a.

 

LS2 based 457 at 650 rwhp'ish.. there are varying degrees to the stroker as well as rpms and so forth... Power done right comes down to money
We can build you an LS2 based 457 and make 750 FWHP on 91 octane pump gas hydraulic roller and all, it just comes down to money number one and a shop that knows what they are doing number two.

 

Didn't expect the thread to get this much attention. I picked up my car this afternoon and sat in terrible traffic on the NJ turnpike with 2+hr delays Car ran excellent with little surging and no fluctuating of rpms all over the place. My build didn't cost me much so I do not consider it an all out build by any means. I have had the car dyno'd at many of the big name shops in my area and have had dramatically different numbers produced(corrected and uncorrected) so even the numbers made today I don't take too serious until I can get back to the track. Both corrected and uncorrected. The numbers today produced 482rwhp/458rwtq SAE Corrected. The cam is pretty large but noticeably pulls harder up top. I'm sure the heads are the weak point of the motor now, but it's hard to justify spending the $ for the amount of gains they would produce. I planned to spray the motor this fall, but will run the car a few times before I decide. As for track numbers the car went 11.7 at 122 opening weekend at Raceway Park this year with me letting out twice during the run so I'm confident it will do a little better this time around. As I said early, the car has dyno'd dramatically different at multiple shops: 472rwhp/475rwtq, 470rwhp/507rwtq, 501rwhp/470rwtq, and the lowest corrected previously to the new cam and UDP was 443rwhp/459rwtq SAE Corrected. No shame at all here and I will post up my track numbers once the weather starts cooling down. Here is the build list for anyone interested:
2006 Corvette w/z51 package
Forged 412ci ls2 motor, Cartek 2x Heads, 247/251 w/114lsa cam, ported 90mm FAST, varram, SLP UDP, Kooks 1 3/4'' with catted midpipe, Dumps right after midpipe, RPM Level 4 Trans, Spec 3+ Clutch.

 

There has got to be something wrong there.

A medium heads/cam ls2 build on stock block will produce 475 rwhp and trap mid 120s. Some cam only cars go between 450-470rwhp

Who did the tuning on it?
What springs are you running with that cam?
How much lift does the cam have?
What RPM are the pulls taken to?

 

I was referring to smaller CI built ls2's in the 402-413 ci range, I will be more specific when posting from now on. I remember a silver ls2 stroker vette that I believe was making around 560rwhp but I think the owner was selling the car. Curious if that was uncorrected or corrected. From what I have seen the 402ci build seems to be the most popular one, but maybe I am wrong

 

Anyway...dyno #s aren't terribly important. Get yourself to a good track and see if it'll at least run 125+

 

I bought the car as a Cartek Stage 2x build. On Cartek's Dyno the car made 459rwhp/434rwtq. This was in January 2009, but the dyno sheet does not show whether or not the numbers are corrected or uncorrected. RPM in Delaware did the most recent tune on the car and it was taken up to 6500rpms. The cam card is sitting at RPM as I forgot to bring the old cam and stock pulley back before I left, need to call them tomorrow to get it shipped out somehow and I can get the exact specs of the cam. As for the numbers you stated, are these corrected or uncorrected figures? Also have the numbers been confirmed from more than one shop? As many people know, numbers can be easily manipulated. Trap speeds seem to tell power much better than dynos from what I have seen.

 

Exactly what I plan on doing
I will report back the day after I can make it back to the track.

 

They are most likely corrected numbers.

 

Which is going to have more torque? A LS3 (378 cubic inches) stroked to 418 cubic inches, or a LS7 (427 cubic inches) stroked to 441?

The LS3 stroked to 418 ci would be 40 additional stroked ci, but the LS7 stroked to 441 would be only 14 additional stroked ci. So is it the bigger "stroke" that gives it more torque, or is it the total cubic inches?

 

I'd have to go with the 441 on that one.






It's likely both, but in this particular scenario I still think that the 441 will make more torque.

 

my car wont get a real dyno number as the converter wont loc for some reason on a dyno, works fine on the street, so i figure a 130 mph from a Cartek cam only in a high stall automatic is making very good power