by all estimates this motor should be (hopefully) well north of 500hp. Compression should be in the ballpark of 12.5:1 (the domes stuck out past the deck about 1/2") The heads are 2.19/1.88 valves and appear to have had port work done at first assembly back in 69. Intake is a Weiand Team G. i port matched the intake to the gasket and the gasket comes within hairs of matching the heads as they sit. I went with an aluminum water pump and have TONYDEE's Old Sanderson Headers on the motor.

The car should have a minimum 4.10's in the rear to keep it happy, but i only have 3.08's i believe. The stall speed of my converter should be 3,000-3500rpm. It has one of these 2 cams, and i am unsure of which...

L88 - p/n 3925535 - .540I/.560E Lift .262I/.269E Duration @ .050 lift
ZL-1 / LS-7 - p/n 3959180 - .560I/.600E Lift .262I/.273E Duration @ .050 lift

 

That thing is gonna be so cool! You're gonna have to post sound clips and pics!

 

first thing after it fires...i will be videotaping the entire event when she fires for the first time and i will be posting it within mere moments i guarantee it

i just edited my above post to reflect a few more details that i know of...

 

You'll definately wanna be recording for posterity. In the meantime just a step at a time. it'll be worth it when you finish

 

Congratulations! I never had a doubt that you'd finish the project.

Here are the dimensions for the march kit that I ran on my BBC C4, http://marchperf.com/pg26.html.

Able to run a crank trigger, dry sump pulley and still have it set below the steering rack.

Please send zip file.

Thanks.

 

for those who would like the ZIP of the pictures, if you either post or PM your email i can send them on the way

keep in mind i am going to clean up and refinish some of the welds and such now that my skills have improved a bit. the crossmember was already finished up as was the steering rack before the motor was dropped into its final resting place. some of the pics are blurry because i am teh sux at photography but i think you'll live

 

Did I miss the pics and video of this thing put together? There is a guy on DC that put a 468 in his 92 I think it was. I'm still thinking about this...

 

We think it might have even been a defective lifter ....

Metal everywhere ....

So out she had to come ....

Ended up looking at about 700 in machine work, so decided to go for a 90 thou bored 502 H.O. that I was able to get for less than 200 more than I would have had in the machined 468 ....

No-Brainer 523 cubic inches.

Edelbrock 61459 heads, RPM Air Gap, Comp Ex 288/294 retro Hydraulic Roller, Beehives, Pro Mag full roller rockers, Scat Balanced Rotating kit ....

That should fix her up ....

Should have it back on the road Mid-July ....

I'll let you know how it goes, but Comp "Cam Quest" program says 500 foot/pounds @ 2500 rpm....

Low-tech, Big cubes RULE ...

Car will weigh 3270 ....

 

Updates Damn IT

I may be getting a 91. And I have a 4 bolt main 454 with 12 -1 pistons and big oval ports ready to go. My other project is an 04 silverado was a 4.3 5 speed. Has had a mild 454 for the last year. Stepping up that motor as we speak. 12 - 1 too big of valve heads i got cheap. Some modfied super comps. Decent hydraulic roller and a modified EFI running off the stock pcm.

Fubar FTW!

 

There is finally light at the end of the tunnel on my project. The Bow Tie 523 C.I.D. is almost complete and with any luck, the financial sky will not totally collapse before I can get it together. We have put some of the extra's on hold, like the accusump and some other stuff that I can at least get through the break-in period without.

Thank the Lord for e-Bay, things like unwanted, been-on-the-shelf for 2 years, brand new Sanderson Block Hugger Headers for $150 "buy-it-now" middle of the night postings, have been a huge help, but patience is essential if you want to save money this way.

Anyway, the block has gone together very nicely, the Comp Cams 288HR Extreme energy cam is degreed to 6' advance, we used ARP studs on the MK V mains and we are sectioning a Mk V 6 quart pan to keep the depth to 7,1/2" for optimal ground clearance.

On a practical note, we are using an e-Bay sourced 2 piece Comp Cams front timing cover in order to be able to do cam swaps without having to drop the pan. The pan to front crossmember clearance is only about 3/16'ths, so without the 2 piece, it would be necessary to jack the motor off the mounts otherwise.

Will attempt to keep the thread up and answer any Q's.

 

It will be nice to see another BB C4 around. The Xtreme energy may be a little mild for that size engine. Mine pulls strong but it is only a 454 (.030 over)

 

Another member with a wild setup is Tonydee. http://forums.corvetteforum.com/memb...tonydee64.html

 

We chose the 288HR cam because it has a 110 lobe sep which will have a narrower torque band, and at lower rpm, but with the ZF-6 it should be easy to keep it in the peak zone.

Also, by the Comp Cams "Camquest" program with our current config., we will have over 500 ft. lbs. bt around 2400rpm+/- with a peak of over 600 in the mid to upper 4's. As they say... "There's no replacement for displacement", so with big cubes it can be relatively low strung (very easy to live with) and still produce impressive stats.

A zero to 60 time in around 3.5 seconds never exceeding 5000 rpm should be possible!

When we looked at more exotic grinds we realized that we were so far above the chassis anyway, that we really could not put more power down safely without heavy chassis mods that are just not possible, money wise, for a long ways off.

The idea here is to maximize fuel economy, enhance long term component durability, and still smoke the "More Money than Brains" club members with their turbo 911's, Ferrari's and Lambo's at track day.

For every hour on the track, there's probably about 4 hours of commute time, so low stress, low rpm cruisability is more important to me at this stage of economic necessity.

We've been at the Watkins Glen N.Y. Vintage event for the last decade or so, and I hope to have this thing there this year, maybe we could organize a "ZR-2" corner.

Did you see GM sold the C-4, 454 "ZR-2" out of the museum at Bowling Green for around $70,000 at Barrett-Jackson in Jan.?

 

Well I admit that you have much more research into it than I have. My car DOES idle smooth and pull over 500ftlbs from 1800 - 5K so you are right when you say no "heavy lifting" is required. There is no replacement for displacement

The ZR2 corner would be fun but I think empty I was going to find a ZR2 badge for giggles after I read about it on the forum when it sold.

 

I can get you "ZR-2" die cut decals that are 3 laminations thick of 3M very high quality commercial UV resistant outdoor vinyl. I can send you a photo of what these look like on the tail of my car. They are identical in font to the ones on the museum car which I have examined closely many times. I have the privilege of having to drive past the museum a couple of times a year for the past few years, so of course I stop there every time I can.

They are inexpensive, and you can peel them off with a heat gun if you decide you don't like them and they will not leave any marks. Looks wise, they are 98% of the cast ones from 5 feet away.

Anyway, I think there's another guy down your way with one of these things, and as I recall his was a feature car in one of the Vette Mags a while back.

Cheers

 

I would like a PM or post a the pic of your decal if you get the time, it sounds cool. I actually have friend that owns a sign shop so after last nights post I figured that I would stop by and see him. I have him making me vinyl "454" logos for the hood and a "ZR-2" logo for the back bumper but it won't have the same look as the original emblem.

 

For any interested...

523 C.I.D. (Mk V 502 X 90 thou over), ZF-6 combo working quite well.

Multiple teething problems, mostly associated with
cooling, but we seem to have it under control
and she runs @170 now with no T-Stat in an ambient
of 90 deg. F, +/- 5 deg. for load or idle.

In retrospect, one of the best things we did was to
spend much effort in the bell housing to pilot bearing
centers alignment, which we got within 3 thou. using
Lakewood offset dowels

Zero vibration and as smooth as silk....

ZF-Doc's "C" beam plates working very well too.

Almost 14 hours of run time so far make all those
hundreds of hours of grunting and fitting, lifting
and setting, cleaning and fixing seem to melt away.

You know you're making progress when tools you've
had out for 2 or 3 years get put away....

Sure gets a lot of attention at cruise night.




.

 

Fuel injection or Carb? Any pics?

 

We need pictures, this sounds awesome

 

Sure hope this works!

Link to ZR-2 523 C.I.D. / ZF-6 pic.s
I'll do more when I can...

http://alturl.com/n9zch