I know it's still a little early to start pulling the 440 apart,but as soon as my neck allows it,I was seriously thinking about advancing my Comp solid 2-4* for some improved 60' times! It's installed at 5* ICL as checked, when installed 2 yrs. ago! Specs are .614I...620E,262@.050I..266@.050E..108 LSA,installed at 105* 60's range from 1.52-1.60. What is the consensus? Thanks for your opinions in advance!

It's a 108 LSA installed on 105 already? Don't bother looking for gains from advancing it any more. Try a 4-hole spacer, different accel. pump cams, different pump nozzle sizes, different launch RPM, etc., if you're looking for better 60-ft. times. Naturally, just my ...

Randy what was the 1/4 et/mph when it went 1.52?

Quote:

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60's range from 1.52-1.60.

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Randy, my you won't see much of a gain.
Seeing .08 spread in your short times seems to indicate you have to look at launch technique. Did you keep the 1.52 time slip? How did you launch with that run? Sometimes little things like leaving from an idle, or putting a little load on the converter make a big difference. Again, my .

My initial thought is there isn't much to be had there, but maybe a little. Assuming 446 CID, 12 CR, 5000 stall, etc.

What compression ratio are you running?
What CID? (446?)
What heads?
What header primary dia and length?
Converter stall, gear, tire dia, etc?

Opinions are good , whether right or not is another matter...............not knowing all the details is difficult to say , advancing ICL (earlier opening Ex valve) could rob some power bearing in mind CR & split pattern , generally not a fan of split pattern grinds unless using power adders.

Zippy..my bad! My best 60' was actually a 1.54,not 1.52! My et was 11.27 @ 119,when we were at Lapeer this past spring!Jim, my CR is 10.25..448 CID..stock Eddy RPM's.TTI 2"x 3.5" collectors! Can't recall the length. Converter's a Dynamic 9.5" that flashes to 4500 rpm. Slicks are 29"x 9" wide. Rear gear ratio is a 4:56. Race weight with driver is 3740 lbs. So..maybe experiment with the squirters and pump cams? Another idea was to get the Eddy's CNC ported by Modern. Hopefully,that change alone will put me into the 10's!

IMO, 10.2 CR isn't enough for a 262/266 cam; so you are giving up some in that area. You can try the cam installed position, it is time and labor not money. Having the heads done by MCH will definitely make a big improvement and mill them for smaller chambers, more CR, while they are out.

3740 lbs is a lot of weight to move, so you are doing OK.

Do the heads.

Randy I would advance it... might try it at 100 to 102
to pick up some torque which will bring the stall up
some on the converter... but advancing it will cut some
of the high rpm's

Thanks Guys! If I do get the heads done,what would you guys bring the compression up to? Was SERIOUSLY thinking of converting over to E-85! 12:1? I know that would definately improve the torque output,and take advantage of the 262/266@.050 duration!

I had my edelbrocks milled .050 and used copper coated steel shims to get mine up to 11.1, quench was right at .040.

You won't see much at 2 degrees advance,but at 4 degrees you will see your torque and hp curve sooner at lower rpms.

First off, I think your combos running really good. If you do nothing to your heads I would try advancing it 4* to around 101* ICL. That is if ?? your P/V clearence will allow that. I wouldnt waste my time with just 2*

o you still have time to do this yet this season, If so I would try it

If not, and your really considering doing the heads. I agree about having Modern cnc port them and give them about a .050 shave to bump up your comp. to about 10.75 or so.

To get to 12.1 you will need 0 deck pistons and a .070 shave. I wouldnt bother IMO, Id keep it 11.1 max with that cam so you could still run pump gas if you need to.

E85, I wouldnt touch it. That stuff sucks I hear. mike


PS, I PM,ed. you back but your mail box was full, about Norwalk!

You might want to check where it is at now, depending on the number of passes and how much RPM it has seen the chain might have a few degrees of stretch in it? Bob P.

Thanks Guys! How about advancing the cam 4* and CNCing the heads,without changing the CR? Would it adversly affect the top-end MPH that much? Or would the improved torque gain be worth it? The car is heavy @ 3740 race weight! Thanks!

I'm sure putting it @ 102 or 101 will really help your 1/4 times likely enough to go 10's and another .3 for ported heads!

I am for porting the headss,Randy. Remember a few years back when we were discussing rods? If you can spring for a set of Eagles or K-1s,it may be a good time to considor that,too!!