Congrats Todd. :thumbsup:

So is it falling on it's face when you stomp the pedal? Or as you "ease" into it?

You're right - if you already bumped the squirter up - then you could be masking a lean primary... usually I'd bump the squirter and or power valve if it "hesitated" as I jumped on it... because it's just there to help the "transition" as you open the blades up quickly (adding fuel to "richen" with no vacuum).

Typically - you divide the vacuum reading in half - gives you a good power valve size.

Lean - usually feels like you're running out of gas or a "flat feeling" to the pedal... and or a lean "miss". Funny how many people chase the ignition system when they're really feeling a lean miss...

I HATE carburetors... :>)

I am excited for you Todd
 

Glad to see it all come together. cannot wait for more updates

BTW - Todd - my explanation wasn't really for YOU ... but maybe others that are reading the thread and working out their own carb issues... Not that I know what I'm talking about! I'm an EFI guy! :lol:

EEEEEEEEHHHHHHHHAAAAAAAA

damn i was on that side of town today too!

Sounds like fun! Glad things are coming together for ya Todd :thumbsup:

The highs and lows of building hot rods. I had a severe hesitation say 1/8to 1/2 throttle. I changed squirters, power valve, adjusted floats and finally bumped the primary jets up 4 and it ran great. So I bring it home and the idle starts getting erratic. Put the vaccum gauge on it to adjust the idle mixture screws to no avail. Thought mayble the new power vavle was opening at idle. I finally figure out that the primary venturis are dripping fuel usually meaning the floats are to high but I set them dead nuts. I pulled the site hole plug and theh primary was to high. Strange, so I reset it and it's doing it again. I watch the fuel in the bowl running and it's to low now. I finally figure out the needle is not moving freely in it's bore. (Possibly debris)So I finally get it running great and the needle craps out. To say I was pissed was a major understatement:lol: Anyway, I grabbed a new needle/seat, float, and gaskets just to be safe and bumped the jet up .001. I'd give it a 9.5/10 now. This car has never run this good. Changes I made to make it happen:

PV: 4.5 to 7.5 to 4.5 to 7.5 (Higher vaccum on this engine)
Primary Jets: 71 to 77 to 78
Front squirter: 32 to 37 to 40 back to 37
Rear Squirter: 37 to 40
Replaced needle/seat/float/gaskets

So another hands on Holley tuning experience. My garage smells like a gas tanker and one of my neighbors came over to complain about the noise. :thumbsup: I've been working on this thing so long and much she thought I was running a shop!

Awesome job Todd.
(You should build some cars out of your garage. You'd make some killer money. You know what you're doing, or at least, pretend you do!!):lol: :thumbsup: :cheers:

I'd go broke working on these things. It takes 5 times longer than anyone thinks to do anything. Plus I'm an anal bastard. Eventually I may start taking on a project or two per year but I'll have to move first and the client would need to be very patient and loaded. :lol: I'm in no hurry to sell this one and start over. In fact, I doubt that ever happens. I work on it for fun but mostly neccessity. I'm sure it doesn't look that way but I'd rather be racing or cruising anyday. It just never ends with these which I'm OK with most of the time. LOL

Hey Todd, in my experience, usually when you make hp jumps like this, you find the weak links in the powertrain pretty quick. Are you worried about the TKO 600 tranny handling past 500-600 ft.lbs?

Nope, if it breaks I'll replace it.:D That t56 magnum looks interesting. :lol: I'm only exceeding the rating by 41 ftlbs. The block was only tested to 650hp in GM endurance testing and I'm 16.7 hp over that as well. Rules were made to broken. haha

Love that kind of talk.

The TKO has held up at power levels way above 600.

It was more from curiosity that I asked. Hurst drivelines rates them at 600 ft.lbs so I wanted to see if they have a good reliability at or over that mark.

I asked the same questions before I got mine and felt very comfortable exceeding that rating. Due to the 1st gear ratio, I do wish I had gone with a T56 (or the new Magnum T56 now available) FWIW.

I'm putting 700ft-lbs through my TKO with no issues so far.

Car looks awesome...I'm jealous of how light that aluminum block is.

Most if not all manufactures will rate their equipment below what it can take. After all they have to warranty the product. The old test it till it breaks then give a 20% safety margin.

I bought a TKO 600 Extreme from American Powertrain -- cryo-hardened gear sets and shafts. It is "rated" to 1000 hp. I haven't had a chance to abuse it yet, but when I do I will let you know how it does. Right now I'm on my way out to the Bull Ring to see how Todd does at the autocross.

Pappy

Congrats on getting to this point Todd! I am looking forward to hearing how the autocross goes. Nice work. And again, thanks for posting so much detail on how you are tuning and getting things dialed in.:cheers:

Just got back from watching Todd at the SCCA autocross. Car looked great and sounded even better. Todd did a nice job on the course -- one of the top 2 or 3 cars. He should be really fast when he gets a slightly loose situation cleared up. He had his camera mounted so he should have good videos.

Pappy

Superb car great detail very sweet, I'd like to see pictures of the whole car :thumbsup:

Thanks Rat.....I just posted a new thread on todays race.
https://lateral-g.net/forums/showthread.php4?t=26044

Payback is ready to be loaded up on the trailer. I just need to wipe her down. I bought new brake pads with different compounds front and back. Unfortunately I have to shim every caliper differently to fit these pads and I simply didn't have enough shims after installing the front pads. Dad and I went out to fill her up with gas and bed the new front pads. The brakes were as good befor bedding as the old pads were bedded! They are definitely a huge step in the right direction. I can't wait to get the rears on and get rid of these crummy Wilwood pads. I'll have more front brake come Saturday. I wish the back pads were on but that will give me something to look forward to next race.

Very cool. Good luck Todd!:thumbsup:

Hey Todd, Im curious who's brake pads/compound you switched to. Is the braking performance good when cold? You have wilwood 6 pot superlites up front and 4s in the back- correct?

BTW- outstanding job on the engine- looks awesome :thumbsup:

Thanks Rich

Payback is lookin killer Todd!:hail:

Paul

I figured you were traveling so I will field the
 

brake pad question.

He switched to Carbotech XP10's up front and will be running there AX6's in the rear. Carbotech is known for having agressive pads that are easy on rotors.

I have not run a set of the XP10's, but I am runnng the AX6's on all corners. That is their autocross pad. I use it as my street pad as well. A little dusty and get the smallest amount of squeal on light stops. Great cold bite pad, has a .52 CF cold. My car has never stopped better.

I am looking for Todd to give me feedback on the XP10's as that is a track pad...that he is driving on the street.

Looking forward to updates from this weekend.

Thanks Payton- checked out there site :thumbsup: - Rich

Hey Guys, I'm over here at DFresh's(Doug's) after a day of driving school at El Toro. The car has some serious bite up front now with virtually no heat. I did run around this morning looking for an ATM and they are pretty noisy. Not squeaky but grindy. Today went great with a mix or acceleration to stopping in a box, apex training, and a really cool road course. Tomorrow is going to be a blast.

Thanks for the update. Looking forward to your review of the driving school and what your next plans are for the car after the shake down.

Remember....smooth is fast.

:cheers:

i thought it was "loose is fast and on the edge of outta control"..??:D

Nope. But it's a lot of fun! :unibrow:

:captain:

Had a chance to see the car today at El Toro. DAMN that car is fast! Todd's new name should be Rocket Man.

Payback had the fastest stop challenge time by a bunch today but was not eligable because of tires. He also was 5th fastest on autocross and top 5 of road coarse.

This man is a gamer folks! And as Zbugger said, the car looks fabulous! great job Todd.

Not surprising. Todd plays for keeps!

:captain:

Congratulation's on the top 5 finnishes Todd!

Sounds like you had a heck of a good day in the Camaro today. Hopefully you will chime in here and share your thoughts on the day.

Nice, love to hear that!:cheers: :woot: :cheers:

NICE!
yeah todd goes for gold when he runs!

:cheers: Official Results:

I ran exibition so take it for what it's worth.

#1 Baer Speed Stop Challenge with a 13.94(#200 treadwear #1 at 14.1xx)
#2 Road Course with a 1:50(David Pozzi at a 1:49 with 200 tread wear)
#5 Autocross with a 41.8(Mary smoked me)

Extremely happy with the car and my performance. I outran Ryan Mathews at DSE by 1 second on the road course and this is my 2nd Road Course race. The tires made a difference but I would of been happy out running him in a supercar. Overall, one of the best times of my life. The after party was a hoot. My go pro camera ran out of batteries on the first run of the day. I"m going to have to rely on everbody else unfortunately. Payback was a blast to drive today. All the hard work finally paid off. :cheers: