What do gt40p heads flow

A great post I found at Corral. Based on that information, I would expect the GT40 Iron head to significantly outflow the P's, but that would prove an incorrect assumption.

The P's not only outflow the original GT40 heads, but they do it everywhere. There is no advantage for the GT40 iron's until above. The P heads also come with 59cc combustion chambers, which will increase your stock 5.

A home ported set will get you about cfm, while a pro ported set is in the neighborhood of cfm. If you were to use an XE series camshaft with a great deal of lift, the GT Iron head would probably work better than the P head for pure, peak flow due to the more linear flow characteristics the Irons have continuing past.

The added advantage is the GT heads work with common headers, and the P heads require specific, and more expensive GTP headers in almost all cases. By under the curve, I mean the flow rate viewed as a graph. If you take the horizontal X axis, and label it "Lift", and the vertical Y axis, and label it "Flow" plotting the flow curve out between the heads would be interesting to look at.

It all adds up to a definite advantage for the P head in most applications. Peak Flow Ex. Estimated maximum lift for GT valvetrain. Exploder motors are right at compression , note Combustion chamber cc size difference above.

Both motors use hyperutetic pistons. Conclusion: "one is not downright better than the other. If you're stuck deciding between the two, go with whatever is available and at a better price.

We will consider intakes from a Cobra or Explorer the same. ChampCar Tech Desk The tech desk is used to ask technical questions and is not to be used as a post race tech line or to phish for how others built their cars. You can download the BCCR here: https:champcar. Suggested knowledgebase articles:. Was this article helpful? Yes No. Article Details Article ID:.