Christmas continues for MOPAR rsacers

[Sam Capizzi Jr]

Originally Posted by GTX JOHN

Plaid is very popular in Boulder City! The different colors
hide all the extra dinners quite nicely!

Sam is your car running very far under the NHRA index as of yet yet?
We could not get ours to run very well over 5500 Rpm with the 2 Brl.
and it screams 7000 plus with 4 Brl. when required.
Maybe we just did not work on it long enough!

I've gone 13.70s at Q weight at my home track. Loaded up and went straight to the Columbus Sportnational and went 13.82.
I have to shift at 5400 5600. Stops pulling on the top end around 5600. The last 200-300 it's just going along for the ride.... The reduction to 182 is going to be worth 55 pounds and about 8 hundredths in the 1/4. Not nearly enough.

[Billy Nees]

Originally Posted by Sam Capizzi Jr

Stops pulling on the top end around 5600.

My 307 Chebby goes on it's nose at about 5700. So did my 6 cylinders.

[Sam Capizzi Jr]

The 318 2bbl motor has two major issues... Intake/carburetor and Valve clearance. Right now I'm using a cam at .050 and I have .025 clearance on the intake and .040 on the exhaust. If they would allow a 4 eyebrow 318 replacement piston, the combo would be good at 185 hp and would pull high rpm with more cam... Btw the 69 motor has .031 less clearance.

[Billy Nees]

Originally Posted by Sam Capizzi Jr

The 318 2bbl motor has two major issues... Intake/carburetor and Valve clearance. Right now I'm using a 240 duration cam at .050 and I have .025 clearance on the intake and .040 on the exhaust. If they would allow a 4 eyebrow 318 replacement piston, the combo would be good at 185 hp and would pull high rpm with more cam... Btw the 69 motor has .031 less clearance.

Well Sam, if you can stand another FWIW(don't ya just hate us keyboard racers?). I don't know how bad your intake is but I do know that some of the early 70s 318s had a single plane intake that doesn't look bad and the carb is bigger than the carb I'm allowed to use on my 307. Have you ever had the heads on a flowbench? What kind of cranking pressure (cylinder pressure) do you have? I'm asking because I think that your cam is a little too big. Shorten up that duration (and tighten lobesep?) and you've got valve clearence. What have you got for header dia? length?

[Sam Capizzi Jr]

Originally Posted by Billy Nees

Well Sam, if you can stand another FWIW(don't ya just hate us keyboard racers?). I don't know how bad your intake is but I do know that some of the early 70s 318s had a single plane intake that doesn't look bad and the carb is bigger than the carb I'm allowed to use on my 307. Have you ever had the heads on a flowbench? What kind of cranking pressure (cylinder pressure) do you have? I'm asking because I think that your cam is a little too big. Shorten up that duration (and tighten lobesep?) and you've got valve clearence. What have you got for header dia? length?

Lets see...
There are two intakes listed. (3698431 and 3698437) Ill have to try and find the one ending in 7.

Heads. No flow bench

180psi cranking pressure

Headers are 1.50 dia with 3' out. Not sure of length but has 12' collector

[Billy Nees]

Originally Posted by Sam Capizzi Jr

Lets see...
There are two intakes listed. (3698431 and 3698437) Ill have to try and find the one ending in 7.

Heads. No flow bench

180psi cranking pressure

Cam is .240/.246 109 advanced 4

Headers are 1.50 dia with 3' out. Not sure of length but has 12' collector

Well FWIW, I'd like to see what the other intake looks like.
180 psi is OK but I'd like to see it around 200.
I'd love to see that things reaction to about a .236/.240 on a 108(or even a 106) and with a lowgear TF it shouldn't need the cam advanced.
1.50 headers are right but I'd like to see it's reaction to a 2.5" collector.

[Sam Capizzi Jr]

Originally Posted by Billy Nees

Well FWIW, I'd like to see what the other intake looks like.
180 psi is OK but I'd like to see it around 200.
I'd love to see that things reaction to about a .236/.240 on a 108(or even a 106) and with a lowgear TF it shouldn't need the cam advanced.
1.50 headers are right but I'd like to see it's reaction to a 2.5" collector.

Very useful information. This is the first cam I've tried but I'm working on second one. The only reason I went with the 109 was to gain some clearance. I had the 2.5 collector on the car and it was a tenth slower then the 3. No low gear in 904. Yet. Next time it's out. Also use 4.56 with 28 tire

[Mark Yacavone]

Originally Posted by Sam Capizzi Jr

I've gone 13.70s at Q weight at my home track. Loaded up and went straight to the Columbus Sportnational and went 13.82.
I have to shift at 5400 5600. Stops pulling on the top end around 5600. The last 200-300 it's just going along for the ride.... The reduction to 182 is going to be worth 55 pounds and about 8 hundredths in the 1/4. Not nearly enough.

For all my friends here...and no disrespect to any one in the business, but if you're using a store bought transmission in a low horsepower combination, you're probably leaving a bunch of ET on the table..That goes for the rest of the driveline too, right Billy Boy?

[Sam Capizzi Jr]

Originally Posted by Mark Yacavone

For all my friends here...and no disrespect to any one in the business, but if you're using a store bought transmission in a low horsepower combination, you're probably leaving a bunch of ET on the table..That goes for the rest of the driveline too, right Billy Boy?

I can assure you that there is nothing store bought about any part on this car.... This car has been 11.60s with a 10-1 340 motor with stock x heads .525 hydraulic cam, 750 on 93 pump gas. All the driveline parts are super lite...

[Mark Yacavone]

Originally Posted by Sam Capizzi Jr

I can assure you that there is nothing store bought about any part on this car.... This car has been 11.60s with a 10-1 340 motor with stock x heads .525 hydraulic cam, 750 on 93 pump gas. All the driveline parts are super lite...

Is that good?

That was a FWIW, Sam .That's all