[Bob Timmermans]

I've run in a fresh 462 and ran into a oil pan leak , valley pan leak and a light coating of milky substance on the inside of the valve covers.
Needles to say I removed the engine and am in the proces of taking it apart again.

I've always been wary about the XE274H cam in the build ( negative posts ).
The problems I'll address but , I've been searching thrue a lot of posts about a fitting cam and I only get more confused about the load of info to absorb.


My goal was 500 hp
So now that it's on the engine stand and I need to order parts anyway , any quick suggestions on the cam ?

462 , BRC pistons , eagle rods , eagle cast crank.
KRE D-ports cleaned up and 2.11/1.66 valves , Harland Sharp 1.5 RR
Q-jet modified according to Cliffs instructions , RPM intake.
Everything port matched , Hedman 1 3/4 headers.
TH400 / TCI converter stall 2000 , 3.31 : 1 gears.

[Skip Fix]

DO you have any flow numbers on the heads?

[25stevem]

If they where just cleaned up they likely flow some 272 intake cfm at between .550” and .600”.

They should make you a easy 500 hp if your compression is atleast 9.5 and if your new can pick will provide you with .550” lift, which should be your target number to hit.

Those HR rockers check in at 1.6 in ratio.

[leeklm]

Check out the specs of the SD Performance "stump puller" cam. Something similar to that should work well in your build. I have used that cam with great results in a 461 iron head and a 455 KRE head motor. One car had 3.31 gears and the other had 3.08 and 3.42 gears. Cam worked well in all of them.

Sent from my SM-G965U using Tapatalk

[tooski]

Bob, I have something similar, but with a T2/Demon, 3200 converter. I ordered the top end stuff from SD Perf. I told Dave I wanted around 500 hp and to get down the track in around 11.5 in a 3200 lb car. He set me up with KRE 295 @ .550" dports and a .570 lift Stump Puller.

[Bob Timmermans]

The heads should flow 270 cfm. cleaned up.
Compression calculated to 10.33:1.

I'm going to check out SD .

Thanks , Bob.

[Bob Timmermans]

I checked out SD for the 'old faithfull ' cam and I'm no 'scrooge' but the price difference between the XE274H $ 170.00 and old faithfull $ 470.00 is something that boggles my mind ?

[Charlie Brengun]

The SD performance one is a hydraulic roller, the XE274H looks like a hydraulic flat tappet at that price? HR cams are just more expensive.

[Formulabruce]

Oil leak related.. Invest in a ONE PIECE oil pan seal.
be gentle with the edges, but It can solve many leaking issues.

[Kenth]

Hard to go wrong with the RAIV cam (Melling SPC3) for a street 455.

I would avoid the XE-cams like the plauge. Noisy ping prone POS on anything but 7.5:1 CSB.

JMHO

[74Grandville]

Originally Posted by Kenth

Hard to go wrong with the RAIV cam (Melling SPC3) for a street 455.

I would avoid the XE-cams like the plauge. Noisy ping prone POS on anything but 7.5:1 CSB.

JMHO

I think you meant to say spc-8 for RAIV

Spc-3 = rounded nose 744


Sent from my iPhone using Tapatalk

[78w72]

Originally Posted by 25stevem

If they where just cleaned up they likely flow some 272 intake cfm at between .550” and .600”.

They should make you a easy 500 hp if your compression is atleast 9.5 and if your new can pick will provide you with .550” lift, which should be your target number to hit.

Those HR rockers check in at 1.6 in ratio.

1.5 HR rockers are really 1.6?

[grivera]

Originally Posted by 78w72

1.5 HR rockers are really 1.6?

I'd like to hear more about this too as I have them in my engine. I always thought under pressure they would flex and be closer to the 1.5

[78w72]

Originally Posted by grivera

I'd like to hear more about this too as I have them in my engine. I always thought under pressure they would flex and be closer to the 1.5

i have read that the 1.65 are closer to 1.7 or 1.72... but this is the first ive heard that the 1.5s are really a full 1.6. i have the HS 1.5s too & have been considering going to 1.65 for a little extra lift & duration on my E- head 467 with OF cam.

anyone else heard of this or can confirm it?

[TB1]

SD Performace website list the HS 1.5 rocker ratio as "actual ratio is typically around 1.55." also mentions the 1.65 ratio closer to 1.7-1.72 as well

[llwta76]

I went through this a couple yrs ago with the HS rockers. I checked the lift of HS 1.65 using light checking springs with a dial indicator and got a ratio of 1.78. However after installing the running springs the actual ratio dropped to 1.69.
I did the same test with my HS 1.5 s and got a running ratio of 1.56

The aluminum rockers flex a bit when fully loaded.
BTW: Test was done using CC valve springs with 350# at .560 lift
Larry

[Kenth]

Originally Posted by 74Grandville

I think you meant to say spc-8 for RAIV

Spc-3 = rounded nose 744


Sent from my iPhone using Tapatalk

You are absolutely correct, SPC-8 it should be.

[Skip Fix]

Exhaust ti intake ratio flow?

Bullet has the Ultradyne lobes I've had good luck with .

[leeklm]

Originally Posted by 78w72

i have read that the 1.65 are closer to 1.7 or 1.72... but this is the first ive heard that the 1.5s are really a full 1.6. i have the HS 1.5s too & have been considering going to 1.65 for a little extra lift & duration on my E- head 467 with OF cam.



anyone else heard of this or can confirm it?

Oh yes... years ago running circle track we had a rule for max lift at the valve. On paper my total lift was within spec, but when checked by officials after a feature win, my advertised 1.55 rockers were closer to 1.6xx and put me over the limit. You almost need to check with a dial indicator or work with a known source to have an exact number.

Sent from my SM-G965U using Tapatalk

[Ponchy]

Originally Posted by Bob Timmermans

I've run in a fresh 462 and ran into a oil pan leak , valley pan leak and a light coating of milky substance on the inside of the valve covers.
Needles to say I removed the engine and am in the proces of taking it apart again.

I've always been wary about the XE274H cam in the build ( negative posts ).
The problems I'll address but , I've been searching thrue a lot of posts about a fitting cam and I only get more confused about the load of info to absorb.


My goal was 500 hp
So now that it's on the engine stand and I need to order parts anyway , any quick suggestions on the cam ?

462 , BRC pistons , eagle rods , eagle cast crank.
KRE D-ports cleaned up and 2.11/1.66 valves , Harland Sharp 1.5 RR
Q-jet modified according to Cliffs instructions , RPM intake.
Everything port matched , Hedman 1 3/4 headers.
TH400 / TCI converter stall 2000 , 3.31 : 1 gears.

Good ol' Schneider cams.
Been around since the 50's or 60's.
Not sure whar exactly you're looking, so I'll provide links to a few pages.
Straight up solid lift and hydro roller cams are apparently custom grinds these days.

http://schneidercams.com/hydraulicli...shafts-23.aspx
http://schneidercams.com/solidroller...shafts-13.aspx