I have been taking the car out during the weekends at night just to put easy miles on the motor with lots of acceleration/deceleration in 5th and 6th gear to make sure everything is A-OK when I bring it to him. I've got about 200 miles on it so far.

I did have the oportunity to get on it a little last night. WOT from a 5mph roll (in 1st gear) thru middle of 3rd gear keeping the revs down to about 5500-6000RPM on the shift.

First - if your considering MT ET Street radials, you should buy them. If I just roll on the throttle easy like the car just hooks and pins you in the seat. I don't know how they will hold up to a standing start yet.

Second - My snubber bar is acting as a lift bar. The car lifts quite violently under WOT acceleration. It also tracks strait and true. Before it always wanted to turn right under acceleration so the ZF-Doc beam plates are helping as well.

Third - The motor feels very strong. Pulls like a freight train once you get it past the 2500RPM part throttle timing stumble. Despite backing the camshaft intake centerline up 2* and porting the crap out of the intake monifold it dosen't seem to have lost ANY bottom end TQ. Seat of the pants is all subjective but throttle response is as good as it ever was IMO.

I'm very pleased so far. Bumping the compresssion up to 11.6 SCR was probally the best thing I could have ever done to this thing. Seems to have totally negated the loss of bottom end power I was kinda worried about. Hopefully the other stuff (ported intake/retarded camshaft) will pick the top end power up like it should.

We will all know once Ed gives me a Dyno appointment.
Will

Good luck with it man!

Thanks Josh
How much is left on yours?
Will

Can you shorten the snub bar or what is your plan?

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It's a fixed length right now.

I thought when I first conceived this idea that someday I may want to be able to adjust the "preload" on the pinion. Honestly once my chassis guy got to actually building it... making it adjustable just made things so involved that he wouldn't have been able to get it done in a timely manner.

Its first purpose is to keep the C-Beam from deflecting and the D44 housing from ripping itself in half. The fact that it transmits lift to the chassis is just a bonus IMO. It just sits on top of the C-Beam plate barley touching with no pre load at all right now. You can see a few little scrapes in the paint where the housing has been pushing up making hard contact on it.

Down the road I may modify it so that I can fool with the pre load on the pinion and C-Beam if I feel it can make a difference.... but the other side of me says "if it keeps doing a good job, why mess with a good thing?"

Will

Oh good. I misinterpreted the statement thinking that the snubber was hindering you by lifting the car itself, not preventing it from lifting. Carry on!

Matthew

What do you think the target is for whp ?

Is that a solid roller camshaft of extreme proportions is my guess? :thumbright:

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My goal was 500RWHP but I'm realistic and know anything over 470ish is going to be gravy.

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It is currently a hyd roller, however if I break it again I'll seriously consider going to a mech roller.
Will

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Interesting, do you have any pics?

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Sure Brian,
Look under my "Roll Bar Pics" and "Rollbar Pics II" threads.

http://www.corvette-guru.com/modules/ ... t_id=93363#forumpost93363

http://www.corvette-guru.com/modules/ ... t_id=94250#forumpost94250

The bar comming off the shoulder harness bar going thru the floor pan (at the storage compartment)is the "snubber bar". If you look at the pic from under the car you can see the 1/2" plate weled to the bottom of that bar sitting directly on top of the pinion to C-Beam mounting point.

As the C-Beam tries to deflect (and the pinion tries to rotate upwards) under acceleration it pushes up on the snubber bar. Since it can't bend or compress that 1 3/4" DOM seamless tubing it's upwards force is transmitted to the chassis by way of the roll bar.

Like I said it's main purpose was to prevent the C-Beam from deflecting allowing the D44 housing to be ripped apart and nothing else.

It just surprised me the first time I stood up in it and the headlights were suddenly aimed at the sky. The car did not have this kind of front end lift or traction even on Drag Radials before. It squated down a little in the rear (like all C4's do) and once the rear suspension bottomed out on the bump stops it would spin the tires. Now the rear suspension does not hit the bump stops and it does not spin.
Will

WOW that's quite an improvement.

I'll have to see if I can do that to mine.

I'm putting a 6pt rollbar in, but it's still going to be street driven.

Not much left on mine. Distributor, injectors, wiring, plugs, wires, etc... I also need to do the oil pan gasket. Other than that it should be ready to roll.