Big Block Intake reccomendation

[rapidride3]

My friend is building a 468 bbc. Some details are 3600 lbs w/driver 4.11 gears, turbo 400, 781 oval port heads w/ 2.19x1.88 heads 10:1 compression, 17/8 headers, 3500 stall with a comp .623 lift solid roller.

My question is,,, what would be the best oval port intake for a 2500-7000 rpm power band? I was thinking of the performer rpm air gap but wasn't sure if it would fall off around 6500-7000?? I was wondering if a single plane would be better. If so what do you guys reccomend? The car will occasionally be street driven with a focus on quarter mile e.t. Thanks, Matt.

 

[Sikmalibu]

i would say a Victor Jr 454-R if he mainly wants to race it. Or the Weiand Team G is a good intake too

 

[rapidride3]

I see,, however the 454 r is a rectangular port intake. He has 781 oval port heads. I have seen people mismatch between intake and cylinder port design. Howeve are there any drawbacks to this??

 

[racecar77]

Why would you worry about power falling off at 6500-7000rpm? That's past the power band of the motor. With that combination the motor will never see 7000 rpm. That motor will make peak HP @ about 6100-6200 rpm, anything beyond that is just going through the motions and risking damage. Lee

 

[10secBu]

With that low of stall and that small of cam, stick with the Performer RPM or the air gap version, dual plane.

If the converter was a higher stall and the cam was matched properly, then use the Vic jr. oval.

leaving a good bit of performance on the table with the cam/converter setup, even on pump gas.

 

[rapidride3]

There was a guy who put a 10'' tire 3700 lb 69 chevelle in the 10.30-10.40 range with this cam, ported heads, ang rpm air gap intake. Comp list this power band of this cam at 2500-6500 rpm's. My experience has been that powerbands on cams are usually good for 2-400 rpm over avertised rpm range.

 

[dev1360]

I agree with 10secbu, there is def. more that you can do with the cam selection. The heads are fine, but the cam and converter could be more agressive. I am 20 min from Stl and I have a brodix HVH that has been gasket matched and cleaned up, but it might be a little big for that motor lol

 

[LS6 Tommy]

The Weiand Stealth intakes are pretty good. They often make a teeny little bit more power up top than the Performer RPM. The P/N for BBC oval ports is 8019.

Tommy

 

[Redline396]

weiand xcelerator or team g are great manifolds(xcelerator around 2000-2500 up)
and ( team g around 2500-3000 up)