Thread: VVL VE Vs DE VE

Just thinking out load about some thoughts that I have been having. I am not sure if anyone can answer these questions from a technical aspect.

When comparing the DE to a VE is it really worth it to turbo a Ve vs. a DET? I am not sure what the Volumetric Efficiency off the sr20ve is when compared to that of the DE/DET. My thought process is the potential gains from going VE-T may be negated by turning the boost up.

Technically, we should all be running sr20ve/ w 9.1 compression, equal length twin scroll manifolds, and turbos flowing 75 lbs/min. . My point is just that I do not see the point from a performance standpoint of spending the extra cash to turbo the sr20ve(piston + rod). When you can just boost the DET to similar levels for the street/strip. I am not speaking about all out race motors. Just a cost vs performance standpoint when dealing with boost.

If someone can explain the benefits it would be greatly appreciated.

OK so it sounds to me like you are comparing the VE with the VE-T and the DET, and not just the VE-T and the DET. Compare apples to apples. If we are talking boost, there is a definite advantage of a VET-T over a DET. The VE motor flows much more than the DE/DET, and to add boost to the VE motor will produce THAT much more power.

YES you can just turn up the boost on a DET. But if you are talking VET-T, what would stop you from doing the same? Honestly??

sure there somewhere on the forum where it was said a ve+t will give you an extra 50hp? over a det

The higher CR maybe?

power to doller ratio it isn't worth it for anything under 400whp imo

Thanks that is what I was thinking.

For everyone else. I am talking about the efficiency of the VE head vs. the DE head on boost in this thread basically. My point is I am not sure that it makes sense to purchase a VE motor then build it when the same effects can be had by adding 4/5 lbs of boost.

idk for some reason I like my VEs NA and my DEs boosted.

the real advantages of the boosted ve are not fully realised yet unfortunatly do to the fact that we have no real good source for aftermarket ve cams, the 20vet's are designed for a small turbo and lots of ex restriction, but to give you a hint compare stock vet to det.....what do you notice? more torque from the vet much earlier, and more power up top

however when we finally do get some nice ve-t cams made, the boosted ve will have many advantages over the ve.......like earlier spool, higher flow, more bottom end and top end, effectivally improving the efficiency of a compressor etc

If I could do it over... The det is way better bang for buck. It spools just as fast, but the cams are better suited for turbo. The killer for the VE is cams, which require you to use a very free flowing exhaust. Meaning, turbos kill the Volumetric Efficiency of the VE motor. You need a very big turbo to take advantage of the stock cams in the VE.

But you could throw in the VET cams and be good for 500whp without any reversion problems.

But there is no evidence to support that the VE will spool faster, but the head flows more. Get a DET running a log manifold and the gt30r turbo and we will compare graphs.

Thanks for the reply. This is what I was looking for along with ca18 reply. I would assume if you wanted to make BIG power 600-700+ this is when the VVL has the advantage in terms of power to dollar ratio.