Looking to possibly change up combo

[sverbus]

Most all know that I run a high compression 434 NA motor but I'm thinking of going to a supercharged setup so I can enjoy the car on the street more as I don't get to race as much as I thought I'd get to when I built this combo, and I don't see that changing anytime soon.

So, with that said, I'm looking at building a roots style blower setup to put on this 434. However, Nicole says that I have to at least be able to make half the money it will take me to build it with parts that I will sell, so I figure the best place to go for a good estimate as to what my stuff will bring in is here with you guys and gals :)

So give me honest thoughts on what I can charge for this stuff at say swap meets or racingjunk! Thanks guys

Dart Pro-1 230's with 2.08/1.60 Manley Sever duty valves, 7/16 screw in studs and guide plates with port work done to open them up. Port work done by Ross Wells in Columbus Ohio, very nice work, and chambers balanced at what I think was round 62cc's. I'd have to call Ross to find out exactly.

Dart Intake port matched to heads and felpro 1206 gasket and in great shape

Comp cams custom grind cam, 272/278 duration with .671"/.671 lift Solid Roller on a 109

JE pistons with 3 seaons on them, 20cc dome and fit a 4.165bore with 6" rod. (I don't know if these would ever sale but its worth an ask) :)

I think that's about it that i'd have to change for the setup. I'm very familiar with blowers as my father has built, and tuned them since I was young. He was busting my balls last night reminding me that he specifically told me that I'd end up changing that crazy compression small block to a blown small block...and he was right :)

[sverbus]

Did I put this in the wrong section and you guys just don't want to hurt my feelings by telling me or what? I'm surprised that noone's had any thoughts to put down about this...

[sc racing]

Why sell the heads?

[sverbus]

ok, sorry for the delay in response...been a little nuts around here. I decided to change up careers and do somethign that means something to me and give me the sort of reward and satisfaction that I've been looking for over a long period of time. In August I started school for Firefighter! and that has been consuming so much of time it's crazy.

But to answer the question about the heads...they are way to small of a chamber to ever get custom pistons that would lower the compression down low enough to supercharge the motor. They were 64cc to begin with, and they had to be milled to straighten them up, that took them down smaller I'm sure. (no, I don't know the exact cc of the heads)

Plus, with 6" rod, and my block has been decked as well, the piston already comes out the hole about 10thousandths. I can always call JE and some of the higher end makers of pistons and see if they think they can make me some that would lower it enough...but I doubt it.

What about the other parts guys?


Thanks,

Scott

[vegaracer]

How low of compression do you want to go?

[silvanova]

What compression you got now?

[sc racing]

Im guessing you want to run pump gas ? If not you can run a blower with 8:1, 9:1, 9.5:1 or even higher. My freind who owned the firebird before me ran 8.8:1 in a bbc with an 8-71 and 18 lbs of boost stock block and gm steel crank.

[sverbus]

I'd like to get down to around 8.5 or maybe 9 if I have to..but yeah..I want to run pump gas.

I'm running right at 15:1 now....

[vegaracer]

I've gone through a bunch of the piston manufacturers catalogs and can't find an inverted dome piston for a 4" stroke. May have to go the custom piston route or de-stroke it. Keep us updated. Thinking of going procharged on my motor for next year and would like to know.

[572 BBC]

SOUNDS LIKE A BBC WOULD REACH GOAL

SORRY FOR BEING A THORN,JMO LOL

GOOD LUCK I THINK YOU MAY NEED A BIT

[wikd69]

I'd like to get down to around 8.5 or maybe 9 if I have to..but yeah..I want to run pump gas.

I'm running right at 15:1 now....

15:1 ? Uh.... HOLY COW !! That's a lot of squeeze !!!

If it were me (knowing what I do now) I'd opt for a ProCharger or some other belt-driven supercharger. The roots style (I have a Weiand 671 on my BBC) are fine, but I think you can get more / better boost for much less weight with something like a ProCharger and it opens up more options down the road for different fuel systems and carb vs EFI/EMS setups. And, especially for a small-block. I've never been a fan of big roots blowers on small block motors - it just has never seemed to be the right mix of hardware. If you can get your compression down south of 9:1 (the 'souther' the better) your current build sounds like a pretty good foundation to go from. The blower/supercharger gives you grunt-on-demand but also lets you drive to the hamburger stand and back without all the really obnoxious (15:1 compression !!!) behavior. Even that wicked cam you have would be tamed to a degree with a blower of some type.

Bottom line, I'd look at new pistons and a ProCharger kit with a good blow-through carb setup.

My 2 cents...

btw, I love the color. Moby Grape on Nitro :)

[sc racing]

The procharger is probably the best way to go , you can get an air to water cooler and still run pump gas. Then again you could put a chiller under the big 8-71 and have it stick up higher than the roof

[wikd69]

The procharger is probably the best way to go , you can get an air to water cooler and still run pump gas. Then again you could put a chiller under the big 8-71 and have it stick up higher than the roof

I've had some extremely interesting experiences with all that hardware sticking through the hood, blocking your vision. Everyone is used to having blind spots to the sides and rear, with roof pillars or mirror angles, etc. Imagine having close to 700 hp under your right foot in traffic with a blind spot right in front of you.

So, the *other* advantage of having the ProCharger style supercharger is *not* running over grandma when she decides to make a left turn from the far right lane, or, having someone turn in front of you from that parking lot coming up on your right just as the secondaries open and you're into heavy boost....

[sverbus]

Trust me, I've definitely thought of the Pro-charger route...but the main reason I'm going roots is because of the fact that my father has ran them for years, and I know what to expect, but also because it will be MUCH cheaper for me to buy and run than the ATI.

But....we shall see. I'm going to call around to some piston folks here soon.

And yeah, 15:1 is nasty...and very obnoxious on the street...but damn it's fun!

[wikd69]

Trust me, I've definitely thought of the Pro-charger route...but the main reason I'm going roots is because of the fact that my father has ran them for years, and I know what to expect, but also because it will be MUCH cheaper for me to buy and run than the ATI.

But....we shall see. I'm going to call around to some piston folks here soon.

And yeah, 15:1 is nasty...and very obnoxious on the street...but damn it's fun!

Now that I've gotten the nostalgia blower car thing in hand, I'm itching to do something new. Don't tell my wife.

I'll tell ya, if I had the money my next motor project would be a multi-stage EFI injected procharger build for this 427. Intercooled, with water/methanol injection on tap, instrumented out the kazoo with pyros and dual-AFR plumbing and lots of custom p-code in the processor (I'm an old C-programmer from way back).

I think I'd prolly have to trash this TCI TH400 and swap in an unbreakable PGlide. I keep breaking parts off this TCI trans and as much as I hate to lose a gear, a powerglide would prolly have to be part of the next build. Course then I'd toss this semi-wild hydraulic roller cam and go with a really, REALLY obnoxious solid roller, and wind the crapola outta this big sucker.

Somebody PLEASE stop me before I do something BAD !!!!!!!!!!!!!!!!!