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Re: more xr1 problems
[Re: Dave W]
#1427095
05/10/13 11:14 AM
05/10/13 11:14 AM
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Joined: Aug 2003
Posts: 1,313
Charlotte, NC
LSP
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,313
Charlotte, NC
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Quote:
Quote:
Why not just use the proven/bulletproof R5 block? An engine in the 420-430 CI range can be built easily.
I'm going to look at a complete R5/P7 next week, and that will be my plan if I end up getting it.
Initially that was the route I was going to take. I even ordered a crank from Winberg to go up to 400 cubes. After waiting 6 months for a one-off crank and with no firm deadline on when it would be done, I decided to take my money and go with the XR2 option instead. I feel like the XR2/P7 engine combo can be a viable answer to the small block guys who are craving more hp. Take a look at all the SB2 high horsepower combinations... no big secret that the heads are the key. I have had conversations with a few different well known head porters and they all agree the P7's have more potential than the SB2's. Unfortunately for us small block Mopar guys, there is no known proven recipe to use these heads in a 400+ cu.in. engine.
King Crankshafts are ~ 8 weeks lead time, I have a billet crank on order with them now.
Ernie Elliott has built over 400 CI P7's using his aluminum block, he did a 440 CI, 12.2-1 compression/mild cam streetable version that made 940 HP through a cast intake/4150 carb, a dual carbed version made 1015 hp. The block doesn't have the typical HP loss associated with aluminum blocks, he developed a improved sleeve system that showed an improvement of 12 HP.
Anyone with any questions regarding these blocks or associated parts can PM me for more info.
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Re: more xr1 problems
[Re: Dave W]
#1427097
05/10/13 11:23 PM
05/10/13 11:23 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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Dave when I last checked they were $7,500. This is machined and ready to bolt parts in. The lifter bores are bushed for Jesel Keyways so that is a little more money but the cylinders are finish honed, the deck is square and the line bore is dead on. I think it is a good price for an aluminum block I just have not pulled the trigger yet. Still playing with Bob's ole junk.LOL
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: more xr1 problems
[Re: Leon441]
#1427099
06/23/13 12:27 PM
06/23/13 12:27 PM
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Joined: Oct 2011
Posts: 3,036
bean town ....Ca
WHITEDART
OP
master
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OP
master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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well guys I was really hoping that I would have some good news about this block buy now. BUT I went to put the oil pump on and found out that it will not just bolt up. the part of the cap that receives the oil pump drive is under size. not a big dill right. sow got this fixed. the quick fix took 5 to 10min on a mill. finaily get the pump on the cap and found out that when kent drilled the oil passage threw the main cap he just eyebald it. the hole is drill so far off the oil pump did not intersect. well back to the mill for an hour or two. now this is turning in to BS. get that fixed. then the guy that is doing all this great work for me says he don't no if the pump will seal to the cap because the orginal hole was drilled so close the the edge of the cap he did not trust it. sow off to the welding shop. one other small problem is kent stamped numbers in the cap right were the oil pump need to seal  guess I will have to get the cap resurface  this is not a bash just telling you guys what it took to get an oil pump on my xri block 
In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
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Re: more xr1 problems
[Re: WHITEDART]
#1427102
06/23/13 01:43 PM
06/23/13 01:43 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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Most stock gasket sets have a paper gasket for the oil pump. I machined the surfaces to not need the gasket. Or was using a soft aluminum spacer on my stroker so it did the sealing.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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