|
452 to replace 915 in a pinch?
#695705
05/12/10 10:42 AM
05/12/10 10:42 AM
|
Joined: Feb 2010
Posts: 155 Tulsa oklahoma USA
2734bbl
OP
member
|
OP
member
Joined: Feb 2010
Posts: 155
Tulsa oklahoma USA
|
Heres what I got: 440 steel crank KB237 Zero deck Stock rods w/ARP balanced Crane 528/552- 242@50 Hyd #H-242/3520-2-8 iron adjustables 1.5 RPM intake My problem is I have this short block with .040 MLS and 915 heads in mind.Turns out one of the 915s is unusable. I have a set of 452s that are fresh and ready to go. My question is can I go with a steel shim and the 452s and maybe a little mill work and be OK as far as quench? If not do you guys have any recomendations? 3500lbs Dart post,TTIs,3200 Fairbanks vert,3.91 gears,750 DP and MSD. Thanks!
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: 2734bbl]
#695714
05/13/10 08:55 AM
05/13/10 08:55 AM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
452's flow well and have hardened seats but can be crack prone but if yours are fresh/checked out you are past that. As said you'll lose your good quench (I'm a firm believer in it) and lower the CR. Might see if you can locate another 915 as recently on here there was a single for sale and there were 2 more singles in the last ~ several months or so. EDIT they were cheap as singles tend to be
Last edited by RapidRobert; 05/13/10 09:05 AM.
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: can.al]
#695715
05/13/10 09:24 AM
05/13/10 09:24 AM
|
Joined: Jan 2003
Posts: 75,062 U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,062
U.S.S.A.
|
Quote:
..i'm not a big block guy but i have been told 452's have a better water jacket design,cool better and have hardened seats....
You need to have a block that has the cooling holes to get the benifit of the revised cooling passages and I'm pretty sure not all 452's have the passages, only those that have the 5/8 hex peanut plugs.
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: Mr.Yuck]
#695716
05/13/10 09:24 AM
05/13/10 09:24 AM
|
Joined: Jan 2003
Posts: 75,062 U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,062
U.S.S.A.
|
Quote:
you'll be fine with the 452's. Many of us if not all tossed engines together with no requard for quench and they ran fine. BTW what is quench anyway? Fancy talk. put it together and lay the hammer down.
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: RapidRobert]
#695717
05/13/10 09:30 AM
05/13/10 09:30 AM
|
Joined: Feb 2010
Posts: 155 Tulsa oklahoma USA
2734bbl
OP
member
|
OP
member
Joined: Feb 2010
Posts: 155
Tulsa oklahoma USA
|
Well the book says 11.5 with a closed chamber heads and an .040 gasket(I assume)so thats too much for 91 octane(all we got here)and although I dont mind mixing a little I dont think I can get away with it.There is always a thicker head gasket I suppose.With the 452s it's more like 9.7. Both sets of heads I have are 2.08/1.74 and the cam is not all that big so I dont think it will make that much difference anyway?It's gonna get driven often so do you think the extra compression is worth it? Motor is going together one way or the other this weekend but I did find another 915 local. Thanks for all the replies so far.
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: JohnRR]
#695718
05/13/10 10:02 AM
05/13/10 10:02 AM
|
Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Quote:
you'll be fine with the 452's. Many of us if not all tossed engines together with no requard for quench and they ran fine. BTW what is quench anyway? Fancy talk. put it together and lay the hammer down.
where ya been John? missed ya. really at 16-18 earlys 20's who knew any of that? He'll be fine w/ the 452's.
|
|
|
Re: 452 to replace 915 in a pinch?
[Re: Mr.Yuck]
#695719
05/13/10 10:56 AM
05/13/10 10:56 AM
|
Joined: Feb 2010
Posts: 155 Tulsa oklahoma USA
2734bbl
OP
member
|
OP
member
Joined: Feb 2010
Posts: 155
Tulsa oklahoma USA
|
Quote:
Quote:
Quote:
you'll be fine with the 452's. Many of us if not all tossed engines together with no requard for quench and they ran fine. BTW what is quench anyway? Fancy talk. put it together and lay the hammer down.
where ya been John? missed ya. really at 16-18 earlys 20's who knew any of that? He'll be fine w/ the 452's.
I have indeed been down that road. I once put J heads on the 273 in my 67 Barracuda thinking I was doin a good thing.....OOPS
|
|
|
|
|
|