Our Bonneville Report
09-07-2010, 06:07 PM
#61
Developer
Thread Starter
Carl, I thought your Pikes car was a 16v?
09-07-2010, 08:15 PM
#63
Rennlist Member
you need to get that rear bumper cut up with some holes, if you car ANYTHING about aero. that back bumper area is like a BIG parachute. all you need to do is vent the bumper where the license plate area is. very very easy and extremely effective.
09-07-2010, 10:28 PM
#64
Nordschleife Master
Given he's planning on 230+ mph, I expect the whole underneath of the car is flat, including up to the edge of the rear bumper.
09-07-2010, 11:02 PM
#65
Developer
Thread Starter
Carl, is the dyno you posted corrected to show theoretical BHP or is it RWHP?
Divide by .85 to get actual engine HP. Add another 5 to 10% if you want to adjust from a eddy-current dyno (which it was) to an inertial drum dyno (like a Dynojet).
I would have gotten bigger numbers on a inertial drum dyno (like a Dynojet) but I like the eddy-current dyno's for holding a load at a given speed for tuning.
Last edited by Carl Fausett; 01-26-2012 at 09:25 AM.
09-07-2010, 11:26 PM
#66
Man of many SIGs
Rennlist Member
Rennlist Member
Fabio, there is nothing theoretical about that dyno chart. That is my actual dyno chart, and because it is a chassis dyno, you can know that it is RWHP.
Divide by .85 to get actual engine HP. Add another 5 to 10% if you want to adjust from a eddy-current dyno (which it was) to an inertial drum dyno (like a Dynojet).
I would have gotten bigger numbers on a inertial drum dyno (like a Dynojet) but I like the inertial drum dyno's for holding a load at a given speed for tuning.
Divide by .85 to get actual engine HP. Add another 5 to 10% if you want to adjust from a eddy-current dyno (which it was) to an inertial drum dyno (like a Dynojet).
I would have gotten bigger numbers on a inertial drum dyno (like a Dynojet) but I like the inertial drum dyno's for holding a load at a given speed for tuning.
09-08-2010, 12:46 AM
#67
Rennlist Member
You had me at "chassis dyno" Now, dont start going off on the eddy curren dynos (brake dynos) because power is power and there are no more losses from one to the other. Personally, ive been on both several times. and have seen less than 5hp variance between them, and that could have been do to something else. i dont think anyone but the folks at devek had more runs on a dynojet than I did with no changes over the years. 320 on the dynojet and shortly thereafter, 317 baseline on the mustang, and 319 with the dual throttle body intake mod. 
.
that .85 is variable, and is really at the top end of the rpm range. 20hp in drive train losses alone go to less than 10hp at the beginning of a 3k to 6krpm run.
.that .85 is variable, and is really at the top end of the rpm range. 20hp in drive train losses alone go to less than 10hp at the beginning of a 3k to 6krpm run.
Fabio, there is nothing theoretical about that dyno chart. That is my actual dyno chart, and because it is a chassis dyno, you can know that it is RWHP.
Divide by .85 to get actual engine HP. Add another 5 to 10% if you want to adjust from a eddy-current dyno (which it was) to an inertial drum dyno (like a Dynojet).
I would have gotten bigger numbers on a inertial drum dyno (like a Dynojet) but I like the inertial drum dyno's for holding a load at a given speed for tuning.
Divide by .85 to get actual engine HP. Add another 5 to 10% if you want to adjust from a eddy-current dyno (which it was) to an inertial drum dyno (like a Dynojet).
I would have gotten bigger numbers on a inertial drum dyno (like a Dynojet) but I like the inertial drum dyno's for holding a load at a given speed for tuning.
09-08-2010, 12:47 AM
#68
Rennlist Member
09-08-2010, 11:00 AM
#69
Developer
Thread Starter
I asked you to clarify because you often post dynos of your SC kits that are not showing RWHP but instead show an estimate of crank HP.
There are still those (myself included) who want to know the improvement over stock HP, and for that you have to go to CHP to compare. Porsche never published RWHP numbers.
Not meaning to generate the usual "which HP numbers are most useful" conversation here. I just publish both crank and wheel and leave it at that. In this thread, I just published RWHP right from the dyno, and let you guys figure it out :-)
09-08-2010, 04:30 PM
#71
Developer
Thread Starter
Karl,
I made the decision when building the motor to use heads studs and not head bolts. I wanted the extra clamping force that the studs provide, knowing full well that if I needed later to remove the heads for any reason, the engine would have to come out of the car to do so.
So thats what we are doing now - pulling the engine.
I made the decision when building the motor to use heads studs and not head bolts. I wanted the extra clamping force that the studs provide, knowing full well that if I needed later to remove the heads for any reason, the engine would have to come out of the car to do so.
So thats what we are doing now - pulling the engine.
09-08-2010, 04:35 PM
#72
Developer
Thread Starter
Pics in Bonneville Trim
The weatherman delivered, and today is bright and sunny.
I rolled the car out of the shop to grab these photos for you of the car in Bonneville Land Speed trim.
It sorely needs a paint job, and that was the next thing we were going to do after the dyno. Also the front and back are higher than the way it will be running at Bonneville. We raised it for going in and out of the building and trailer.
Once out of the trailer, we lower it to where it is on the deck.
I rolled the car out of the shop to grab these photos for you of the car in Bonneville Land Speed trim.
It sorely needs a paint job, and that was the next thing we were going to do after the dyno. Also the front and back are higher than the way it will be running at Bonneville. We raised it for going in and out of the building and trailer.
Once out of the trailer, we lower it to where it is on the deck.
09-08-2010, 05:10 PM
#74
Developer
Thread Starter
The lever on the tunnel to the right of the gearshift releases the parachute.
One of two fire bottles is shown... there is 10 pounds for the engine and fuel cell, and an extra and separate 5 pound system for the driver. Thats why yoiu see two fire pulls next to the gearshift.
There are more photos of the "Bonneville Build" here:
http://www.facebook.com/pages/928-Mo...3156459?ref=ts
If you subscribe to our Facebook account, you will get news feeds and updates on the progress of the car.
One of two fire bottles is shown... there is 10 pounds for the engine and fuel cell, and an extra and separate 5 pound system for the driver. Thats why yoiu see two fire pulls next to the gearshift.
There are more photos of the "Bonneville Build" here:
http://www.facebook.com/pages/928-Mo...3156459?ref=ts
If you subscribe to our Facebook account, you will get news feeds and updates on the progress of the car.
09-08-2010, 05:36 PM
#75
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
You should "rattle-can" it red just like the factory did 