450hp out of leftover parts?

[chilly460]

I'm still buttoning up my current 390 with BBM heads, but sort of stepped in another shortblock that I want to use to put together a collection of misfit parts. 

I have been porting a set of C1AE heads and will be using them for this build, I want an old school combo with iron heads and solid flat tappet cam.  Part of this is driven because that's what I want, part of it is cost.  This is very much being done on the cheap, but I don't want a low rpm combo, wanted something that will make decent power around 6000rpm and can shift at 6500 if really needed. 

I lucked into a Edelbrock 7505 dual quad intake for $150, and while I was picking up the intake I picked up a freshly rebuilt 390 longblock that had been sitting in bad storage, never fired.  It's going to need a hone on one cylinder, one piston was stuck but I've freed with a lot of Kroil, but the cylinders are fresh otherwise.  It has brand new SpeedPro .030" L2291F pistons, and had a brand new XE274H cam and lifters,  new Comp timing chain, Melling pump in it with stock reconditioned rods.  C4AE heads with fresh valve job, stainless 2.03"/1.53" valves, some generic springs, and positive seals. $200 for the longblock, I couldn't resist. 

I also have a 428 crank that I picked up last year that's been turned but will need polish, so plan is to use it to make a 416" from this shortblock, and either shelving or selling parts of the longblock.  I have Autotec pistons on the way, Crower EDM lifters, as well as a 247/256 .583/600 108 solid flat from Brent. 

So Edelbrock 7505, 10.5:1 cr, 247/256 solid flat, C1 heads ported to go 280/185ish, and 1 3/4" headers, 1.5/1.5/3mm ring package and a 3.98" crank. 

450hp out of the question, 500ftlbs?  Peaks at 6000/4300 respectively?  I want a "hotrod" motor so didn't care about idle, fuel mileage, or need for cheap gas.

Power estimate from a solid flat tappet combos listed by Brent and Paulie, acknowledging the heads I'm putting together likely aren't going to be as good as theirs

[e philpott]

I would think it 450 doable with what you have at 416 cubes ... what size carbs are you using on the 2x4

[chilly460]

Well thinking it’ll be close to 427 medium riser performance so I believe a pair of the 750 Performers would be closest, taking edelbrock vs Holley performance i to consideration

[unclewill]

Whatever hp it makes it sounds like a super fun build!

[chilly460]

Yep, it’s fun for me to try to piece one together from used parts and forum deals where possible.  Pistons aren’t exactly cheap stuff but not many options for a 410 combo.  I’ll be combing Carlisle and the forum for rockers, valves, few other pieces that are needed.  It’s so easy to make big power nowadays that it’s tempting to buy new parts, and I’ve done that, but it’ll be interesting to see how a iron headed flat tappet deal runs. 

[bluef100fe]

Chilly,

Your build closely resembles my trucks 390 build from back when. It's posted in the proven build section under "390 pump gas deal". Very similar cam, heads etc. some differences would be the dual quad intake, and 428 crank, but it was a dyno proven 453hp and 447 lb ft of torque 6300/4700 rpm peaks, but that was also with 2" primary tube/3.5 collector fenderwell headers, when I tested my trucks 2wd 1-3/4 x 3" headers they were down 10-12 lb ft and hp across the whole test range from the fender shell exit headers. You didn't speak of valvetrain but that's one area where I did spend some money on good shafts, TI retainers, HS rockers, arp studs and end stands.

Good luck with the build.

[machoneman]

450 hp, yes. 500 ft/lbs? No, more like 450-460.

450hp out of the question, 500ftlbs?  Peaks at 6000/4300 respectively?  I want a "hotrod" motor so didn't care about idle, fuel mileage, or need for cheap gas.

[chilly460]

Probably right, I was using this as a comp http://fepower.net/simplemachinesforum/index.php?topic=5039.0

I'll have more compression which I thought would help, but have to think that his Felony heads would make more torque than large port low risers, and a somewhat smaller cam may build more torque.   450ftlbs probably more realistic...

[chilly460]

Chilly,

Your build closely resembles my trucks 390 build from back when. It's posted in the proven build section under "390 pump gas deal". Very similar cam, heads etc. some differences would be the dual quad intake, and 428 crank, but it was a dyno proven 453hp and 447 lb ft of torque 6300/4700 rpm peaks, but that was also with 2" primary tube/3.5 collector fenderwell headers, when I tested my trucks 2wd 1-3/4 x 3" headers they were down 10-12 lb ft and hp across the whole test range from the fender shell exit headers. You didn't speak of valvetrain but that's one area where I did spend some money on good shafts, TI retainers, HS rockers, arp studs and end stands.

Good luck with the build.

Thanks, Cody, that is a very similar build.  I'm still looking into rockers, I'd like to go OEM but by the time I find a set and make sure the adjusters are solid, and put end stands and spacers on them, it's creeping up on the price of a HS setup. 

[cjshaker]

You'd have to purchase end stands and spacers even if you did get a set of HS rockers, so the OEM still may be a cheaper route, and still get the job done.

[chilly460]

Ahhh, I see it now.  HS sells a "heavy duty" option with end stands, at least according to the pic in summit, but it's $1300.  I didn't realize the standard setup didn't have end stands.  Thanks for the heads up. 

[e philpott]

Ahhh, I see it now.  HS sells a "heavy duty" option with end stands, at least according to the pic in summit, but it's $1300.  I didn't realize the standard setup didn't have end stands.  Thanks for the heads up.

You will need good end supports regardless of the rockers you use or you could end up with shaft breakage problems

[Tommy-T]

Hey Chilly, that sounds like a really fun project. It'll probably make more power than you think.

I've got a junkpile project too. It all started with the purchase of a set standard bore Arias flat top 428 pistons from a FE Forum member.It was a really good deal I couldn't (but should have) pass up. Had the machine shop sonic 3 390 blocks before one was found that'd have .100 walls all around at 4.13. Recently, after Mrs.-T bought me an Ebay Chineese sonic checker for Christmas, I checked the cylinders myself and found 2 at less than .100...with a low of .079. Gonna do a half fill and run it. Not only is this my first (and last) attempt at getting 4.13 out of a 390 block, it's my first use of block filler.

The rest of the shortblock will consist of C1AE-B rods, and a 1U crank that got junkpiled because one rod journal got ground too wide and the fillet radius is pretty much gone. Fun!

A used single pattern solid flat tappet cam that I ran in my Hi Riser in 1985 (.595 lift and 300 advertised duration) and some C3AE-D 427 Low Riser heads, along with a used "pre-stretched" timing chain from the junk drawer round out the long block.

Gonna be topped by my Quad Dual M/T cross ram.

Cool, man!

Anyway, I hope you'll have as much fun as I am putting yours together!

[plovett]

Are you putting 2.09/1.655" valves in the C1 heads?

[chilly460]

Not sure on valves, I have 2.09 / 1.65 set I could pull from the edelbrocks I just pulled off my 390 which would be “free”.  But I also have a set of CJ heads I’d rather use them for and run 2.15 or so if possible in the C1s, want to get it to breathe.  I’m sure 2.09 is big enough but if 2.15s will help may do that. 

I