Recent content by Knap

Oils and STP results from VOAs are updated on this site http://www.lnengineering.com/oil.html Follow up article from MG owners indicates that it is still not an issue in UK (SL oils)Penrite also released a tech bulletin warning about the use of SM oils with flat tappets...

Extract from an excellent book on tyre grip and covers effect on wet road http://www.insideracingtechnology.com/tirebkexerpt1.htm

The equations we use in the WTW (since 1999) are the same as used by Claude Rouelle. Geometric Weight Transfer - due to the component of lateral force, applied directly at the Roll Centre (RC). Geometric WT is reacted directly through the suspension linkages, and does not induce body roll. It...

Any help http://www.autozine.org/technical_school/handling/tech_handling_3.htm

The concern appears to be over ZDDP rather than base oil http://www.joegibbsracingoil.com/datasheets/81106.php Amsoil have a tech bulletin on flat tappets http://www.amsoil.com/dealer/techservicesbulletin/TSB_flat_tappet_and_camshaft_lube.pdf These types of oils are a PAO ester mix, however with...

Would low oil temperature be an issue re cavitation and additives not being as effective, as well as not maximising power output?

BP sell 102 near UK race tracks for the track day enthusiast 60bhp increase claim http://www.bp.com/sectiongenericarticle.do?categoryId=9009114&contentId=7016932

CentralCoaster This is old http://www.carnut.com/ramblin/_cool3.html I believe Vizard recommended lower temp for more power but again many years ago. From Internal Combustion Engine Handbook The important factor regarding operational life and reliability is the component temperature. The...

Rod Was the Lotus Cortina sold in US?

Rod This statement An additional advantage is that, due to their different composition, "premium" fuels are typically two or three percent more dense than "normal" fuel, which means that each litre contains two or three percent more mass of fuel, and hence two or three percent more energy...

7.7 What is the effect of engine deposits? A new engine may only require a fuel of 6-9 octane numbers lower than the same engine after 25,000 km. This Octane Requirement Increase (ORI) is due to the formation of a mixture of organic and inorganic deposits resulting from both the fuel and the...

A current recommendation for UK motorways is 78mph, not that it will be changed from 70mph. During the 1973 fuel crisis when rationing was almost introduced, the UK Government recommended 56mph for most economical motorway speed.

Rod I'm not convinced by that statement. An original test when Optimax 98 arrived in UK (now Vpower 99)showed no improvement for a Clio http://fifthgear.five.tv/jsp/5gmain.jsp?lnk=601&featureid=143&pageid=273 Conventionally, enrichment for maximum power air/fuel ratio is used during full...

We should note that even cars designed to run on regular fuel might require higher octane as they age. Carbon buildup inside the cylinder can create hot spots that can initiate knock. So can malfunctioning exhaust-gas-recirculation systems that raise cylinder temperatures. Hot temperatures and...

I understand that fuels sold in UK except Shell Optimax (V power) Tesco 99 (Ethanol) and perhaps BP Ultimate (noticed run on using this), are basically and often literally, exactly the same base product in to which each company puts in their own additive package. i.e you will see all kinds of...