Thread: Think I went with too big of a turbo...

This^. I was told from the start to run a tubular manifold or the stock vet. I agree being in the turbo's efficiency range also helps

How does a tubular manifold prevent reversion caused by too much overlap?

The longer the runners, the harder it is for an adjacent cylinder's exhaust pulse to contaminate another cylinder. It doesn't rid the reversion entirely, it just reduces it.

I shouldve drove it.

What do you have kicking in the Vvl?

If a log manifold had a better separation of the flow, it wouldn't be a problem.

This is a typical SR20 FWD log:


Bruce from Protech has been very helpful to me, he gave a bit more detail on why the log manifold is far from optimal flow wise. One of them is the exhaust flow from cylinder #2 can go to cylinder 1 or 3 and contaminate them as coheed has mentioned.

Tubular manifold separates them and gives a bigger distance before they are all in one collector. A very short runner tubular would be a little better but not by much.

If we could run one of these log manifolds, it probably wouldn't be as bad too.






We had plenty of time too! Thanks for letting me drive the GTiR, next time I come up I want to drive that GT-R though!



One happy camper about to go for a spin:





MSD 6989. Getting the VVL power directly from the battery, VVL ground is from the MSD. MSD is getting power from cigarette lighter, ground is on the chassis (before it was on the intake manifold, it looked like it made noise, thus I moved it to the chassis).

heeyy now, easy on the 71r..

Vadim. JP seems to be beack, so if you still want these shoot a pm

It was just fine .



I decided to just build the manifold thus I wont be needing them, thanks for letting me know though!

Ok.... That car SERIOUSLY looks bad ass with Se-L. That is just.........my god.

I have no words.... no words what so ever how sexy that car is.