588 Blower Motors Cam Choice
 

All
i am having to rebuild my Apache motors they are 588 CI with B&M Mega Blower running 6 lbs boost twin 900 CFM carbs. Current cam is UltraDyne 245/256 @.05 and 650 lift 114 separation. should i go a bit bigger. Rev limiter set at 6000.

thanks for your input

Is that a solid or hydraulic roller?

cam
 

it is hydraulic

https://cimg2.ibsrv.net/gimg/www.off...56f440d73f.jpg
Comp cams marine grind, easy on the valve train .
4/7 swap
microfinish

I`m running 548ci, 9psi

Just curious what the bore and stroke are

What heads and stroke and desired peak rpm.

Like that cam you are using just little more lift which is nice
not sure on the bore and stroke but will check i was told it was 588
putting brand new Brodix 327 BB3 Extra 400 @ 6000
Max 6000
know i probably don't need larger but love the sound big cam.
think the new heads will pick up torque versus the old Merlin Cast Heads
Any more input much appreciated.

Those heads flow great at 0.600. Could make great power with mild lift.

Probably 4.560 bore and 4.5 stoke.

If OP plans on pulling to 6k best have more duration. .650 lift max.

I have 4.25 stroke 565 CI cams spec’d 249/253 6k peak. Heads 347 cc out flowing 340 cnc promaxx heads via Jim v. just a comp

If it is a 4.5 stroke, it could use more cam

588ci is a 4.5 stroke and 4.625 bore.

i,m thinking time for a pair of 14-71s and bigger carbs

thats a 604ci

The OP does need a blower that moves more air more than a cam change.

most likely a 4.5 bore x 4.625 stroke

sweet thanks for all the input trying to find out bore and stroke but no info yet. Yea love to stick some Whipples on it but sticking with old school blower for now and since engine apart was just thinking about cam upgrade. any other input would be appreciated. GetRDunn what is lift and separation

Tks

just found the Diamond Piston Spec Sheet it says

4.56 Bore
4.5 Stroke

Is that 588 CI

yes. 588 cid’s

I know where theres some 16s coming up for sale
https://cimg9.ibsrv.net/gimg/www.off...872dd567f2.jpg

now those look nice so i am bigger bore than stroke is that unusual

tks

no. Not unusual at all. Most bbc’s 454-598” are that way. Here are some common ones.
454 is 4” stroke 4.25 bore
496.(not factory gen vii) is 4.25 stroke 4.31 bore
502 is 4” stroke 4.47” bore
540 is 4.25” stroke 4.5” bore
556” is 4.375 stroke 4.5 bore
572 is 4.375 stroke 4.56” bore
572 is 4.5 stroke 4.5 bore
598 is 4.5 stroke 4.6 bore

Thanks good to know

GetRDunn what did your heads flow

Any one want to guess horsepower with slightly bigger cam?

Lift is .704 net - 114 lsa. Spec’d to peak @ 6k and carry to 6,300. Heads flow approx 10-15 % more than the promaxx 340 cnc version. Should make 750 @ 6k. Possible more if the heads perform well allowing to peak out at 6,400 and carry from there.

You should have a torque monster with those heads - int runner. The lobe family from comp that icdedppl used would something to consider especially if your going SC. I’d just step up the duration a few degrees with your stoke and CI. Or the same. With superior flowing heads you can ease on the duration and let the heads do the work.

Tks Dynoed at 850 at only 5200 rpm due to old ignition and just 4 lbs of boost now has MSD 6A set at 6000 hope to top 900 with new heads cam might add another 20 what's your thoughts.

you should very easily see 1000 hp with the right components well below 6k with those cubes.

ck out icdedppl’s threads on his 548’s.
A 540 with a 1071… 900 hp all day long.

thank you sir

Just went back to OT. Mega blower great blower but personally wouldn’t put on anything much more than a 502. But yes I get it…. All comes down to lots of $$$$

yes sir got to stop somewhere wife already *****ing

sell it all and pick up one or 2 of these.

https://autos.yahoo.com/chevy-zz632-...120000132.html

or you could throw a 3/4 race cam at it.:D

yea that would sound sweet

Wow I didn't reolize that those hot cams are still being produced!!
I think I'm gonna order a bunch of them for the boats and the cars, Thanks for the heads up!!:drool1:

I'm surprised Comp hasn't come up with a Full Tilt Pro Surge cam. :)

Maybe we can get a package deal only I want the full on race for my rigs. “King of the drive in and boat launch cams”.

BTW what drives are behind these engines?

588 Blower Motor Upgrade
 

All wanted to share my recent upgrades on Apache motors HP Mafia rebuilt them only change is going from old heads which where Merlin cast iron to Brodix BB3# Extra and slightly bigger cam app. 680 lift versus 650 results to me are crazy especially the torque and all at 5400 RPM
Top HP 931 Versus 830
Torque 1001 versus 871
That's using old school B&M 420 which i am sure leaving HP on table. Want to thank Anthony and his crew

Greg

Very nice