I got a new GoPro camera today, and I wanted to test it out, so I made a few short, boring videos. It seems there are a lot of people who are afraid to put larger parts (heads, cam, intake, converter, ect...) on their cars, for fear of losing drivability. While I'm not suggesting that you go "all out," I'm merely trying to demonstrate that with today's technology and knowledge, you can go "bigger" without killing drivability.
A lot of worries start with a single plain intake, larger intake runner heads, larger duration cams hurting the low end torque. There are a lot of misconceptions that lead to people believing they only make power at high RPMs, and sacrificing all the low end tourqe, making them doggy on the street. I also see people saying mechanical secondaries don't do well on the street.
My combo gets driven 5000-6000 miles per year, and has been a best of 11.18@122 on motor, and 9.92@134 on about a 160 shot, at 3475 lbs.
The motor is a 408W 10.48:1
Twisted Wedge heads that started as 185s, and are in the neighborhood of 200cc now. They flowed right 320 CFMs @ .600 lift.
Ported Vic Jr
Holley 950HP
cam is a Bullet hyd roller - .588/.588, 243/250@.050
Trans is a PA Suepercomp C4, tranbrake, Neal Chance 5000 RPM stall converter
Here is a little street drive, and I put it on the transbrake before I drive it, just to show that it does go to 5000 RPMs. You can see driving the car around, that it's very tame, and even with the loose converter, there is no shaking or shimmy like I've heard from other people with loose converters. You can tell it starts moving as soon as you let off the brake at idle, and smoothly accelerates as you apply throttle, without getting anywhere near the 5000 RPM stall speed. The car is extremely tame.
Now here i take a little trip and merge onto the highway in Mexico. When I merge, I'm going right at 65 mph when I downshift to second, and punch it a little.
Then I went out and played on a backroad in Mexico. This will show that it makes more than enough low end torque to get you in trouble.
Here's a rundown. The beginning is obvious. It start in first, and roll into it slowly, giving it maybe 3/4 throttle and feather it a lot.
At 34 seconds, I'm at about a 25-40 roll in 3rd gear, which is my 1:1 gear....the highest gear I have.
At 50 seconds it's about a 5 roll, with lots of throttle feathering.
At 1:10 I start slow and go through all 3 gears without moving much...lol. I've hit them ll and let off by 1:15
1:37 is about a 60 roll in third.
2:05 is the same.
Take a little ride in my stang
My '70 Pro-Street. Mildly built 302, Mallory 6AL ignition, Hurst w/4-speed, 74 Maverick rear w/3.40 gears. Tied frame with 6 point cage. Trunk mounted battery, Dynamax Exhaust. Building a 351W 40 over now...
