This is for a mainly street, occassional strip car. 4:11 gears and AOD trans with 2800 stall. X-Celerator, 2v Open heads milled 0.050", 0.030" over block decked 0.025", about 9:1 compression, both 650 DP and 750 VAC Hollies, Hooker Super Comp headers.
What is the idle like? smooth, lopey or just a burble?
How is this cam for street driving?
Any and all comments appreciated. I know I'm going to hear to call Mark for a custom ground cam. I know it would be much better. Let's for this post stick to the garden variety, off the shelf, F238 cam.
I haven't run it, but I do have one on the shelf. I'd love to stick it in my 2V engine, but I just don't trust the spindly little studs in the Crane conversion kit. But, the required springs are not really that wild. And my compression is too low.
It'll have a bit of a lope to it. The main problem is that 9:1 is not nearly enough compression for these cams. 10:1~10.5 is mroe like it. My 226/230 hydro has only 145 PSI cranking pressure with 9.3:1. A 238 solid is going to have even less. With 9:1, you might be in the 130 PSI range. Not a lot of low end with that.
238/248, with triple springs, open chambers and flat tops. no decking that i'm aware of? it doesn't exhibit any symptoms of low compression, other than that it will run without issue on 89 goat piss straight from the pump. lopey idle, rumpity rump all the way up to roar. it'll tach past 7k if you let it. maybe it would benefit with more compression? for now it makes the lifters go up and down. definately lets you know it's got a cam.
I was gunna ask the same question but what do you reckon if it was running 2v cc heads chambers opened up to 62cc's zero decked flat tops same intake and carb as Danford's? Or a set of AFD 2v's? cause a mate is stepping up to a f246 and offered the f238& lifters with very little use for a good price, worth a shot or give it a miss?
2v's and/or AFD heads. I still run an F246 copy. I used to run 64cc 2v heads without issues (10.5:1 compression, pump fuel). I now run the same setup with 60cc CHI alloys running 11.2:1 compression (pump fuel).
If your cams not up to scratch or the engines not performing like you want it to? An F238 should liven things up.
Re: If you've got the driveline combo it'll work with
May 19 2004, 8:50 PM
How'd you like the F246-style cam with the small chamber 2V's? I'm doing a similar setup, ported Aussies, Funnelweb, 4 speed and 3.89's, and was worried that Comp's version of that cam was gonna be too wild to do any street driving.
I have that exact comp cam which is practically identical to the crane F246 and I don't think it is too wild for the street at all. I have a 4-speed and 3.89's, blue thunder intake and 650 mighty Demon. I also run power brakes. I am still tuning things but it is shaping up to a really nice combo.
I run the F246, but it is yet to crank up. Will be this, or next weekend. The auto is in the shop, so still a few weeks for that. My mate runs a F246 in a full sized XD falcon which does 11.6 over the 1/4. He has 3500 stall, and 3.9 gears, Its is still great on the street too.
With the alloy heads I got a decent increase in compression and are still able to retain pump fuel. I dare say for my setup there's plenty of compression. Still ran a firstname.lastname@example.org with blown auto with basically no top gear. It can't have been too bad