Thread: Intake manifold options

We tried one on a 2.3. Those manifolds are trash. Leave it to the boosted guys.

care to take a few minute's to explain a few reasons,or post a link to a thread that explains it?

The runners are way too short for N/A. You lose all sorts of power from this.

Really?

You lose low-end torque with a short runner intake, but will gain high end HP.

It was a factor of this manifold and a shitty 4-1 header that caused the car to make weak power. Small, short runners. Car did ok down low but ran out of breath early where the other 2.3 motors completely dominated. Not our #1 pick.

I tested a short runner intake manifold like this. It was an O2 induction manifold. Looked nice but the short runners killed power bad every where in the RPM band. This was a 2.0 VE.

I'm convinced these motors love big intakes. Even on a stock 2.0, gains were all over with the big manifold on my 2.3. I tell everyone to invest in the intake manifold before anything else.

the runners on the "n/a" version measure 14.5cm or 5.66 inches. whats ideal for a ve then? anyone measured a n1/bj runner length?

so your pick is???

Custom obviously. The BJ's manifold is nice for the price and has been tested and proven on n/a setups. It would be interesting to see how my BMC Race manifold would do on an n/a setup. Its got the right runner lengths, very well formed trumpets inside, Nice plenum design and large plenum. The builder of it built it based on my revs which was 9700-10,000, so for a nice high comp ve on kelfords id bet it would do pretty well, especially over that KS manifold and the stock manifold, and the Excessive plenum on n1 runners.

It has all the necessary key elements to work very well. Only downfall on it is the runners are not perfectly straight and have a slight curve to them but they angle into the head at the same angle as the port and the curve in the runners is very smooth so i doubt it will matter much. Also the runners are quite large.