real horsepower numbers
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,638
Likes: 3
real horsepower numbers
OK guys I need to know the real horsepower numbers for a stock 86 with the 4+3 tranny. I need to do some calculations on top speeds so I can determine if I have to tweak the motor to reach 130 MPH in 1 mile - for the bonneville Salt Flats - 130 MPH club. I know it sounds easy - but last year 110 people tried and only 8 or 9 cars made it - (a load of motorcycles made it).
Keep in mind that you are loosing 10% to wheel spin on the salt - so essentially we need to get to 145 MPH in 1 mile!
We made it pretty easily in an 82 with a 350 HP motor - qualified 7 different people in that car. Now the C-3 has stepped up to the 150 MPH club - and the C-4 will be doing the 130 MPH grunt work. We don't want to disappoint perople, so we need to be sure that this car will make it comfortably - if not we need to tweak it - right away.
Carl Johansson
Fresno Ca.
Keep in mind that you are loosing 10% to wheel spin on the salt - so essentially we need to get to 145 MPH in 1 mile!
We made it pretty easily in an 82 with a 350 HP motor - qualified 7 different people in that car. Now the C-3 has stepped up to the 150 MPH club - and the C-4 will be doing the 130 MPH grunt work. We don't want to disappoint perople, so we need to be sure that this car will make it comfortably - if not we need to tweak it - right away.
Carl Johansson
Fresno Ca.
Team Owner
Joined: Sep 2001
Posts: 62,160
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The factory crank numbers are pretty close, 230HP, but the torque number can really vary, mine ended up with about 350-355tq at the crank with minimal modding.
About 190rwhp and 290rwtq for a bone stock 86, give or take.
About 190rwhp and 290rwtq for a bone stock 86, give or take.
Le Mans Master
Joined: Mar 2001
Posts: 9,464
Likes: 1
From: Modesto CA
haha, I know how you can trap 130 in the 1/4 mile 
But seriously, is it a rolling start, or a standing start? If it's a standing start, then you prolly don't want too torquey of a motor, because you'll be giving a lot up to wheelspin. Since you're a manual tranny also, I'd recommend a MiniRam, along with a cam somewhere in the neighborhood of 222/230 (Crane makes one) along with a set of those Vortec Fast Burn heads. That oughta be a good setup for a 130mph in a standing mile.
But seriously, is it a rolling start, or a standing start? If it's a standing start, then you prolly don't want too torquey of a motor, because you'll be giving a lot up to wheelspin. Since you're a manual tranny also, I'd recommend a MiniRam, along with a cam somewhere in the neighborhood of 222/230 (Crane makes one) along with a set of those Vortec Fast Burn heads. That oughta be a good setup for a 130mph in a standing mile.
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,638
Likes: 3
It's a standing start - but since it's 1 mile, wheel spin off the line is really not an issue. Changing gears is where you have to be carefull of wheel spin. I know it seems like a trivial task. Essentially we are building these cars foir the Silver State and Ensinada road races - but this is just a fun stepping stone.
Carl Johansson
Carl Johansson
