Another 489bbc question

[Blue Rat]

I think I would run with the 10.5-11.1 CR. Get the 270cc or equivalent head. Stay away from the cheaper heads. Go with the 119 cc head. The 270cc race rites come with the 2.25 an 1.88's. If the price scare you take a look at these prices https://www.airflowresearch.com/ here. Hyd. roller would work to around 6500 or so. But if you go solid roller you are not going much over 6500.

[68c10owner]

Originally Posted by Blue Rat

I think I would run with the 10.5-11.1 CR. Get the 270cc or equivalent head. Stay away from the cheaper heads. Go with the 119 cc head. The 270cc race rites come with the 2.25 an 1.88's. If the price scare you take a look at these prices https://www.airflowresearch.com/ here. Hyd. roller would work to around 6500 or so. But if you go solid roller you are not going much over 6500.

The AFR heads are more expencive but either the AFR or the Brodix are great heads that will make plenty of power. If you shop around you can find the Brodix heads a little cheaper.

Contact Chris Straub or this guy about the heads,

http://www.lewisracingengines.com/

Mike Lewis can order them with whatever spring you need for whatever cam your going to run. I would stick with a hydraulic roller. Go for low-mid range torque to get the heavy truck moving so I wouldnt think you would see 6500rpms much.

[Kyle@FTP]

Originally Posted by 68c10owner

The AFR heads are more expencive but either the AFR or the Brodix are great heads that will make plenty of power. If you shop around you can find the Brodix heads a little cheaper.

Contact Chris Straub or this guy about the heads,

http://www.lewisracingengines.com/

Mike Lewis can order them with whatever spring you need for whatever cam your going to run. I would stick with a hydraulic roller. Go for low-mid range torque to get the heavy truck moving so I wouldnt think you would see 6500rpms much.

I think I mentioned the solid roller a few post back and we got off topic to lifter bleed.

I do think a Hyd roller set up will be great for this build. And when it come to the heads just work out the math. How mutch it will cost to have the 781s done correctly to build the power you want vs. what it cost to buy a new set of heads that will make that power.