Project "Payback"

[Vegas69]

Come on Greg, it didn't even ruin my day. The thought of more power excites me. Pretty sure I've now touched every bolt on this car. That's a good thing. I'm going to start calling some engine builders tomorrow sometime.

[awr68]

More Power!!
Sorry it had to happen this way, but the end result will be awesome!!

[Flash68]

Originally Posted by skatinjay27

NICE!any thing under 750 will be too low!lol

I like this talk!

[monza]

It can only get better now!

I'd be a little more pissed at the engine builder, just shouldn't be.

[phillym5]

DANG!! And i felt bad for leaving my little oil spot on your floor!!

Good catch though.... I remember you chattin about a .... twin turbo big block??

[Vegas69]

750 Horse...twin turbo.... I'd have to redesign my fuel system and go to a 540. I don't want to go to radical. I need the low end power for autocross and street driving. I'm hoping for 650/650 out of the new motor.

I got over being pissed at that engine builder a long time ago. I was just out looking at the pistons. Not one has a drill mark. Nice balance job. The good news is I have some quality parts. SRP forged pistons, all arp hardware, Dart pro 1 heads, k1 rods, etc. I'm going to have every single thing checked before it goes back together. It will be top notch.

[Vegas69]

Originally Posted by Gonzo

Todd 10 lbs residue valves & springs behind the pistons will not help your knock back issue.. I worked for Wilwood in the research & development dept for 10 yrs!!!

I have asked you to send me in all your specs on your whole complete brake system.. Pics I am pretty sure I can help you resolve your issue!

You will create brake drag with residue valves or springs behind your pistons!

Residue valves were built into OE master cylinders when drums were standard equipment on cars.. they consists of a one way valve.. which held pressure when drum brakes retacted back from when pedal was released.. They are also heavily used when a master cylinder reservoir sits below level of the calipers @ the wheels.. When the reservoir sits below level of calipers the brake fluid will drain back into the master cylinder reservoir.. 10 lbs for drums & 2 lbs for disc brakes..

Springs behind pistons have not been used for a long time in production OE cars.. The caliper designs of today do not require them.. I remember when Wilwood used to use them on Winston Cup calipers 15 yrs ago for the same purpose that you are stating of eliminating piston knock back or when the caliper that were used from 65 to 81 Corvettes(J52 option if I remember correctly).. Cup seals with a piston design that would float in piston bore.. Piston to seal design has come a long way since then..

Steve Rupps Bad Penny ran Wilwoods for some time... He has never complained about piston knock back to me!! He is running Baers on Penny now but not cause they were a bad brake system with issues!!

I'll take you up on that. PM sent.

[waynieZ]

The upgrades sound like a good plan. Are you going to do any head work or just a bigger cam?

[nvr2fst]

Originally Posted by Vegas69

So anyway, would the engine have lasted a while? Maybe..... but I wasn't taking any chances of grenading the motor on the road course etc. Now I need to find a reputable engine shop that can blueprint, re balance the crank, hot tank the block, etc. Any recomendations will be appreciated.

Now for the fun part, more compression and a mechanical cam. I'll put it together and make sure it's done right. It will be better. Here is where I stand.

Good luck with this Todd and as stated IT WILL BE BETTER Up here we call that winter work. But considering where your from there's no such thing I guess.

[T_Raven]

Dang I fell way behind on this thread. Had to spend the last couple hours catching up, guess I never subscribed. It's great to see the story continue and get to learn from the problems you are running into and the adjustments you make. Thanks for all the good info