Re: 269/275 solid roller install
[Re: mopar dave]
#3018981
02/26/22 12:05 AM
02/26/22 12:05 AM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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May have missed it but why not cut the pistons for clearance? What is target/current compression ratio?
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: 269/275 solid roller install
[Re: mopar dave]
#3018987
02/26/22 12:47 AM
02/26/22 12:47 AM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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Not interested in cutting the notches. Its currently 12.5:1, would like to keep it around 12. Ok, good luck
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019000
02/26/22 04:41 AM
02/26/22 04:41 AM
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Joined: Aug 2003
Posts: 43,332 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,332
Bend,OR USA
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Not interested in cutting the notches. Its currently 12.5:1, would like to keep it around 12. Isky offers a piston notching kit that you can use with the pistons in the block at TDC to remove as little or as much you want to. I bought the guides and cutters years ago for 3/8, 11/32 and 5/16 guides and two sies of intake and exhaust valve size cutters, work great . I tape off the top of the pistons to the block and ran a vacuum cleaner hose to the port I wasn't using to suck most of the cuttings out as soon as the cutter cut them, work great with no real problems afterwards I'm not sure how much a 2.20 cutter removing .045 from the piston top makes measures in CC but I bet it isn't much
Last edited by Cab_Burge; 02/26/22 04:42 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019031
02/26/22 10:26 AM
02/26/22 10:26 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Doesn't look like i get enough clearance with this cam unless i install it at 108, straight up. Not gonna do that. I put the cam in at 106 and still cant get enough on the exhaust to be safe. .064" just is not enough and i found a new issue, a bent exhaust valve. It doesn't take much to bend these. So, now the head needs to come off to get that fixed and a new cam will need to be ordered or i take the opportunity to upgrade to 440-1 heads. How much piston to head clearance do you have? Whatever that is, is all you need for P/V. I’ve run as close as .040 but I run a gear drive. Your .064 on the intake wouldn’t bother me in the least.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019055
02/26/22 11:46 AM
02/26/22 11:46 AM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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With the cam in at 106, I have .044 on intake and .064 on exhaust with my last measures. What is the intake lobe lift at TDC?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019057
02/26/22 11:48 AM
02/26/22 11:48 AM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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Doesn't look like i get enough clearance with this cam unless i install it at 108, straight up. Not gonna do that. I put the cam in at 106 and still cant get enough on the exhaust to be safe. .064" just is not enough and i found a new issue, a bent exhaust valve. It doesn't take much to bend these. So, now the head needs to come off to get that fixed and a new cam will need to be ordered or i take the opportunity to upgrade to 440-1 heads. Will your headers work with the exhaust port location of a 440-1?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019058
02/26/22 11:56 AM
02/26/22 11:56 AM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Street/Strip. Looking at my Moroso slide rule, it shows my hp at 650hp(3500#@134mph) , that is with a single dominator. A 511 with 12.5:1 should be making 700+ hp, so it looks mine is lacking somewhere. Too many people have reported disappointment in these E victor max wedge heads. I want to make as much power as possible and drive on the street as well. No power anything in the car, its a weekend toy with a full interior and cage. Thanks With most of your time being in mid range rpm I think a smaller port than MW would be better and maybe avg tq output.Have you looked at a wider LSA in an engine program to see if that would be something to consider?
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019074
02/26/22 01:18 PM
02/26/22 01:18 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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Lobe lift at TDC.
Zero indicator on base circle, bring piston to TDC during overlap period, read what the intake lobe lift is at that point.
It makes no sense that the new cam would have vastly different lobe lift(which translates to V/P clearance) during the overlap period.
The intake lobe lift at TDC, with the cams installed at the same centerline, should be within .020.
.020” lobe lift difference, x 1.65 RR = .033” difference at the valve.
If the old V/P clearance measured .118”, the new clearance should be about .085”.
The old cams intake lobe lift at TDC, installed at 106, should be .141”. The new cam should be .155”-.160”.
440-1 exhaust ports are raised about .750”
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 269/275 solid roller install
[Re: mopar dave]
#3019127
02/26/22 04:36 PM
02/26/22 04:36 PM
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Joined: May 2005
Posts: 2,013 Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 2,013
Apollo, PA.
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With the cam in at 106, I have .044 on intake and .064 on exhaust with my last measures. If you put the real springs in there and measure with clay you'll find it will add typically .030 to those numbers. I typically do it both ways every time ( unless with the checking springs I already have a ton) and that's what I have found. The lash used was .018?
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