lazerlemonta

LOL fixed

sxc Z28

I knew what you meant Phil but these waters are salty

HioSSilver

iTrader: (8)

Idk.....with the wear the cylinders probably have at 168k miles it might actually be a 347 now lol

Darth_V8r

iTrader: (4)

Self-honing engine -- the next big thing in displacement on demand...

big hammer

I once took a 350 sbc apart that had up to .022 cylinder wear

big hammer

I offered my Old Cam to jaik for free a couple months ago just to smash the record even harder. He was going to do it but decided not to last minute because he doesn’t have a lot of spare time, is just going to pull the motor out soon and we knew he was going to trash the record anyway.

A fresh bottom and and that Cam and I bet 555-560 rwhp would be very obtainable.

Now build with 13.5:1 compression for E85 like some are doing now and you’re easily at that 575 range that vetteboy was talking earlier and everyone said no way

big hammer

Attainable or obtainable... which word is more correct in that application?

G Atsma

I would lean towards "attainable", but "obtainable" would not be totally inappropriate, as far as I can tell....

big hammer

Without googling it, in my mind “attainable” sounds more like an achievable goal while “obtainable” sounds like an achievable possession

G Atsma

LOL I think you're right! It was too early for me to do much analytical thinking, so you got what I mind-googled above.....

Darth_V8r

iTrader: (4)

I remember that. i think vette boy was thinking cam only though? If I was going to do it, it might end up pushing the definition of SBE, because the hardware has to be able to hold up. The other thing is that 539 was through a 9" with 4.30 gears and a manual transmission. Swap in an auto and the number drops. Swap in a stock rear end and gearing,the number probably goes up if the rear holds up. So there are still variables in there.

I agree with 13.5 to 14 compression and E85. The cam, I would honestly take my 237/245-112.5+2 (hydraulic equivalent 232/240) up five degrees on both sides to 242/250 and do a 114+4 to really open that exhaust valve early and blow down the cylinder. I'd bump the lift to about 680. Aim for peak power at 7200 rpm and run a ITB intake manifold.

It's be a REALLY expensive 40 HP and a turd below 3500 RPM, but given really good heads and dual exhaust, I think that's the recipe to 575.

And Hammer, I did appreciate the offer on the cam very much. I just travel so much for work right now, it was getting to where I had to choose between swapping the cam OR getting dyno time. And with the bottom end going, I've been getting parts together for something a little bit off the wall.

G Atsma

THIS is gonna be GOOOOOOD!

big hammer

Lol I know why you didn’t do it. I just wanted to see the bar set so high it would be unbeatable... but it’s not like that Cam would have gained another 25 hp. I’m guessing 8-10 maybe

HioSSilver

iTrader: (8)

I'm not so sure you have to stop at 575 whp.

My friend Chris made 630 crank on his engine dyno with a stock headed hydraulic cammed carb'd style intake 5.7.....stock rockers with trunion upgrade. It was on alchohol with a built bottom like hammer is saying. Engine went in a dirt car.

Darth_V8r

iTrader: (4)

Damn! that's in the same ballpark

big hammer

You could go more but will need more RPM. Then it’s just the limit of where the Stock bottom end gives up.

Darth_V8r

iTrader: (4)

I think the overall condition of my bottom end is some evidence that 550-575 is pretty close to the limit of what the bottom end can withstand.

I agree a 5.7 can go higher. If it's all forged, for sure. Just running out of safety factor on the stock parts is all.

Darth_V8r

iTrader: (4)

Hell, I think I seen someone did 630 rear wheel with an all-bore 5.7 at crazy RPM. I can't remember exactly, but I'm thinking like a 4.125 bore with a 4.8 crank. It's bugging me now. crap

HioSSilver

iTrader: (8)

Yea i agree. It's just getting to the compression needed on sbe would be hard with oe pistons.

A ls6 bottom would likely have a better shot at hitting 575 sbe with oe coated pistons, better bay to bay and stronger rod bolts.

Tony @ Mamo Motorsports

Jacob,

Looks like your giving my 220 heads a work out now for sure....LOL

Just awesome results and your 440 ish torque is the key indicator this is on an honest dyno and your number is REAL. Its making the power by carrying the torque and breathing upstairs at higher RPM when there is soooo little time to do so.

Clearly the ported MSD I did for you is in its element now as well.....the whole combo really came together with the move to the SR recently.

On paper (based on flow) I felt my MMS 220 heads were good for that kind of number (640 ish at the crank is probably maxed out and your getting close to that) but it's nice to actually see it in a real world application (your likely right around 600-610 flywheel factoring in your driveline which is more efficient with the modified BC2 I helped you with). Its just a really kick azz package at this point!!

Where we going next!?!? Time to step into some cubes? Stroke and sleeve the block you have now? Its certainly been good to you!

Im really happy for you and understand its no accident either.....your one of those guys that obsesses over finding more performance and keep pushing the envelope and you deserve all the credit for making it happen (I will take a little for helping you with some optimized high flowing efficient parts that helped you get there!....LOL)

Look forward to meeting up with you again one day soon.....let me know the next time you might be in the So Cal area!

Congrats man.....really awesome achievement!



Regards,
Tony

PS....Sorry Im a little late to the party....super busy of late and if it wouldn't have been for a few guys texting me about what you did I would still be clueless!