Quote:

---

interesting replies to a somewhat simple question.
some say yes, it's doable, some say no, some say they've done it.
i'll just add this, since we've done builds like that over and over through the years. don't expect to just throw a bunch of parts at it thinking it's an automatic 600 HP. your choice of parts will have a huge effect on the final outcome. 275-280 cfm will get you there if everything else is chosen carefully. the machine work and assembly need to be done right, obviously, but the tuning to do it reliably on pump gas is critical to having any kind of success for a daily driver. it's certainly not aerospace engineering though. you better start with a real good block or the whole thing may not last long. cracked mains and split cylinder walls are common on stock blocks in that HP range.

---

Quote:

---

600hp out of a small block is pretty easy to make. My 461 small block makes 741hp and 638torque with indy heads, single 750 carb, pump gas and naturally aspirated.Car runs great in plus 30 degree(canada) weather and runs high 9zz at the track, best et [Email]9.75@139.88mph[/Email] on a 10" tire. Full interior and totally street legal from horn to lights to wipers to full exhaust!!

---

Any chance of posting cam specs and the power band on your small block? thankx Craig oops compression ratio also

Quote:

---

I'll beg to differ with that
Greg

---

Quote:

---

Hmmm..don't tell the competitive NHRA superstock 360's that!

---

Quote:

---

Sticking with the facts, i think a well thought out eddie on pump gas COULD make 550, maybe a touch more, but not 600.


Were it me i would get a set of big CNC Indy smallblock heads, to where an optimal combo would make 600 or better in pump gas mode. The eddies just arent a big enough head NA to make the kind of power you are looking for

---

Quote:

---

Quote:

---

Sticking with the facts, i think a well thought out eddie on pump gas COULD make 550, maybe a touch more, but not 600.


Were it me i would get a set of big CNC Indy smallblock heads, to where an optimal combo would make 600 or better in pump gas mode. The eddies just arent a big enough head NA to make the kind of power you are looking for

---

I agree and disagree. I think 600 has been done and will continue to be done with an edelbrock head. I bought mine thinking they were better OOTB than they really are, and I was just shooting for something in the 500HP+ range. I've spent as much on my Indy Edelbrocks as I could have spent on a set of indy 360-1's to be at the same point power wise. But if I had to do it again, I'd have done an Indy 360-1 head for sure.

If you're starting from scratch, I'd highly recommend passing over the edelbrock heads as you'll have a lot of $$$ in them or have a less balanced motor build by the time the edelbrocks support 600 HP. A CNC ported 360-1 will do this much more easily with less CAM and probably only a small % more $$$ to do it.

Greg

---

I think around 600 has been done as well, but not at 10-10.5 compression(at least that i am aware of)

that said, all dyno's are different

Quote:

---

Quote:

---

Quote:

---

Sticking with the facts, i think a well thought out eddie on pump gas COULD make 550, maybe a touch more, but not 600.


Were it me i would get a set of big CNC Indy smallblock heads, to where an optimal combo would make 600 or better in pump gas mode. The eddies just arent a big enough head NA to make the kind of power you are looking for

---

I agree and disagree. I think 600 has been done and will continue to be done with an edelbrock head. I bought mine thinking they were better OOTB than they really are, and I was just shooting for something in the 500HP+ range. I've spent as much on my Indy Edelbrocks as I could have spent on a set of indy 360-1's to be at the same point power wise. But if I had to do it again, I'd have done an Indy 360-1 head for sure.

If you're starting from scratch, I'd highly recommend passing over the edelbrock heads as you'll have a lot of $$$ in them or have a less balanced motor build by the time the edelbrocks support 600 HP. A CNC ported 360-1 will do this much more easily with less CAM and probably only a small % more $$$ to do it.

Greg

---

I think around 600 has been done as well, but not at 10-10.5 compression(at least that i am aware of)

that said, all dyno's are different

---

600 isnt the problem doing it on pupmp gas is I have a 416 at 12.8-1 with CNC Indybrocks on race gas no dyno# but calc weight and et it pushing right at 550 with a TINY solid roller so more in it for sure with a cam change.

Quote:

---

Well I hope it's not out of the question, cause we're getting ready to rebuild a 440" sb mopar on pump gas and 600 is our minimum target!

Someone else built it the first time, and it made only 577HP but was eating itself.
We will be fixing all the problems and shooting for 620HP on pump with only 10.5:1.

We're using his Indy 230cc -2 heads over and it's a nice siamesed bore R3 48°lifter bore block.
It's a flattappet engine as well....
Brian

---

Quote:

---

Quote:

---

Well I hope it's not out of the question, cause we're getting ready to rebuild a 440" sb mopar on pump gas and 600 is our minimum target!

Someone else built it the first time, and it made only 577HP but was eating itself.
We will be fixing all the problems and shooting for 620HP on pump with only 10.5:1.

We're using his Indy 230cc -2 heads over and it's a nice siamesed bore R3 48°lifter bore block.
It's a flattappet engine as well....
Brian

---

Brian, the original poster was asking about doing it with eddie heads, not Indy's

---

Quote:

---

Quote:

---

Quote:

---

Well I hope it's not out of the question, cause we're getting ready to rebuild a 440" sb mopar on pump gas and 600 is our minimum target!

Someone else built it the first time, and it made only 577HP but was eating itself.
We will be fixing all the problems and shooting for 620HP on pump with only 10.5:1.

We're using his Indy 230cc -2 heads over and it's a nice siamesed bore R3 48°lifter bore block.
It's a flattappet engine as well....
Brian

---

Brian, the original poster was asking about doing it with eddie heads, not Indy's

---

Yeeeahhhh. I figured that one out. Thanks.
I posted mostly because I feel the same way as others...eddy heads won't get you there IMO.

---

i quite agree that the eddy heads won't get you there. the problem is they'll require a lot of work and you'll have to give up good driveability to get there. it can be done, and has been done, but it's not for the faint of heart or the low budget guy. also, throw that 10-10-.5 compression out the window. it's going to need more than that, even with pump gas. the camshaft is a key component to make it work. as i said before, choosing all the right parts and top notch machine work and assembly practices need to be followed. after that? you better be a very good tuner and be willing to spend some time with it.
better heads make the 600 HP threshold a whole lot easier.
my advice would be sell the eddy's and upgrade now, you'll be happy you did.

Brian, the combo your working on should make that 620 without too much trouble IMO.

Quote:

---

600 HP out of a small block Mopar on pump gas has been done at Larry's Auto Machine in Groton Connecticut. Enclosed is a link you can see the dyno sheet and a video of the dyno pull. You guys will also see that Larry's Auto Machine is a sponsor of Moparts.com.


http://www.larryspower.com/dyno/SBmopar.html


If you Mopar drivers are looking for "Race Winning Power" visit Larry's Auto Machine at www.larryspower.com

---

Quote:

---

Let us see some prices that some of these combos cost.

And how about an E85 build ? [/quote

i have built 3 and with they have all been about 10k with stock blocks that included everything for a running motor,thats using indy eddies and normal eddies none of them made 600 hp but one was real close on tq the indy eddies were not ported but useing 1/4 mile cac. was around 460 at real wheels