Rear wheel horsepower, How much should I have |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Rear wheel horsepower, How much should I have |
porschefile2010 |
Apr 24 2013, 01:41 AM
Post
#1
|
Member Group: Members Posts: 228 Joined: 26-May 11 From: Whangaparaoa, New Zealand Member No.: 13,118 Region Association: Australia and New Zealand |
So, we finally have the rebuilt engine back in the car and we decided to tune it on a "rolling road" to make sure we got the mixture right.
So this is a 75 2.0 with standard FI and no emmissions gear on it. I had sort of hoped for around 75hp at the wheels but it has come out at 57hp rwhp. Engine has new AA pistons and cylinders and the standard 2.0 heads so does this sort of number sound right and if it's way short what could be the problem. Also, will it get better as the new pistons settle in. I go get the car on Friday so will put some pics up then |
Mblizzard |
Apr 24 2013, 07:35 AM
Post
#2
|
Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
I thought brake horsepower (bhp) was the measure of an engine's horsepower (at e crank) before the loss in power caused by the gearbox, alternator, differential, and other components. So I have always been told that measuring HP at the wheels (dyno) will always result in a lower number than the published figures.
A 1975 has 88 HP as a published number. Without the emission stuff you are likely getting more than that. But 57 does seem a little low. |
Lo-Fi Version | Time is now: 27th September 2024 - 12:32 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |