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Headsense Cylinder Heads & Engines

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22.01.2022 More Willowbank testing

20.01.2022 Tech Talk Hi everyone. Most of you know that up to 2009 l drag raced with NA V8 Chev's in a few different classes, and since 1995 in a Gp2 Superstock bracket in Championship class racing, classes with a lot of rules, essentially power per cubic inch classes. After 2009 l did nothing racing wise and then two and a half years ago l decided to have a crack again, in Superstock, but this time with a boosted Toyota 6 cylinder, so here is a look at the Toyota 1jz 2.5 ltr l choose f...Continue reading

17.01.2022 Tech Talk ? Hi everyone. l have a tech question, lets see how we go here. Now this is a Centri blower question, but it does apply to Turbo motors as well. If we have a centrifugal blower that on one size motor at a particular impeller speed makes 20 lb of boost. ... And the same blower on a smaller motor makes 40 lb boost. Question is. Is the blower working harder on one or the other motor? And if so, which one and why? This is not a trick question, but i'm keen to see how we all go, cheers, Col See more

15.01.2022 one of the runs at Willowbank recently

10.01.2022 Pit warmup at the last willowbank test day

03.01.2022 Tech Talk Hi guys, sorry for the long gap after the last tech talk . Ok so talking about 4 valve motors it's accepted by most that it's a very efficient design with high velocity across the valve seats and little in the way of port restriction from pushrods and the like....Continue reading