I have a set of aluminum svo x302 heads I am putting on my maverick motor. The intake I ordered was a weiand xcelerator. When checking the size of the ports via gasket, the heads are HUGE, and the intake has about 1/4" all the way around where it is too small. What intake should I be getting for these heads? Should I just angle grind the intake ports for a more smoothe transition....does it matter? How much power am I pissing away by using this cheapo intake manifold? Should I have purchased a rpm air gap? Its not too late to return it to summit.
I could be wrong, but i dont thing their will be any intake with a perfect match. A die grinder and some time would get you the best results.
I think Ford recommends using the M-9439-A50 intake gasket on those... not sure though. http://www.mustang50magazine.com/techarticles/m5lp_1011_ford_racing_x302_crate_engine/photo_08.html
Those are the gaskets I have...I talked to a reputable engine builder and he says I can open the intake up some but not particularly worth it as the runners will still be a restriction. With my budget concerns I should stay with it as the step fromintake to head acts as a anti reversion thingy. He says money would be better spent on a airgap or victor something. Any other tips?
for anti reversion you want 1-2mm at the most not 1/4" as far as weiand being cheap I gotta say their quality is the same as the edelbrocks i've had over the years...
The first thing you need to determine is the size of each intake port on the head.........take measurements.............then do the same for the intake manifold.......now, take a look at the measurements on each corresponding port. What you really want to do is make the intake ports .025" smaller on all four sides (floor, both walls, and the roof) than the ports on the heads. The newest therory is this will help with atomizing the fuel/air better than making them exactly the same.............as we did in the old days......but this only holds true to carburetor motors..............doesn't work with blower motors and injected motors.............anyway, forget about matching to the gasket, just make sure the gasket does not protrude into the port anywhere.....................IMHO
So what issue are you having with your roller rockers..................it took me almost 5 months to figure out my problem.
See thread above, basically learning how pedestal mount works...and getting a crash course in shimming and pushrod length....
Bringing this back up....Car isnt running now, but wondering what intake I should look at to more properly match the heads? Anyone with gt40x aluminum heads around here?
with a stage 1 cam.. the air gap style dual planes will give you a fatter average torque curve over that single plane and the car will be better on the street. Either way you go there.. that cam will run out of rpm range before the manifold will anyways.. so it's moot to think that the dual plane will cause a bottleneck. tbh.. with those gears.. and the lighter weight of these cars.. I would be looking at running a bit more cam and keeping the single plane setup. Just my opinion based on personal driving preferences though.. and your ymmv.
The stage 1 with 1.7RR's has pretty damn good lift right? It pulls hard all the way past 6500rpm... I just have problems with the gears now the vacuum secondaries dont open till way too late. The car is VERY snappy due to this. I think with a bigger intake and 750 double pumper (Jetted correctly) and playing with the timing, that there is a TON more to be had from this longblock.
