Piston and Rod Combos
Burning Brakes
Joined: Sep 2005
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From: Iowa
To answer your original post; at those levels you can get by with about any forged 4340 H-beam connecting rod and KB hyper piston. KB hypers have a bad reputation mostly due to engine builders not taking the time to set them up properly and then work on what you can and can't get away with. Doing our job properly, we have disproven all the "can't do's" that we have read about.
When you look at the Carrillo K1 connecting rods keep in mind that these are not the Carrillo rods that you may have heard about in the past. The ones we have used on sprint car engines cost around $2500 depending on the bolts installed. I'm not saying that they K1's are not a good part for the money; I'm just making sure that you understand you will not be buying their top shelf connecting rod.
As for making over 500hp at 7000 RPM with a 355; it's totally possible and really not too difficult if you have the budget. About every cylinder head manufacturer and magazine out there have put together engines that pulled that much and more with modern camshafts and cylinder heads.
When you look at the Carrillo K1 connecting rods keep in mind that these are not the Carrillo rods that you may have heard about in the past. The ones we have used on sprint car engines cost around $2500 depending on the bolts installed. I'm not saying that they K1's are not a good part for the money; I'm just making sure that you understand you will not be buying their top shelf connecting rod.
As for making over 500hp at 7000 RPM with a 355; it's totally possible and really not too difficult if you have the budget. About every cylinder head manufacturer and magazine out there have put together engines that pulled that much and more with modern camshafts and cylinder heads.
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From: All humans are vermin in the eyes of Guru VA
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I expect that the K1 rods are at least as good as SCAT rods. At least K1 advertises their weights.
I am not exactly making a NASCAR or F1 engine here.
I am not exactly making a NASCAR or F1 engine here.
Last edited by Guru_4_hire; Oct 5, 2008 at 10:49 AM.
Le Mans Master
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From: Seattle WA
St. Jude Donor '14
. It's all good 
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From: All humans are vermin in the eyes of Guru VA
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Le Mans Master
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Ok Sir, call me as-hole Jim about anything but sir lol.
Guess its to late now to talk you into the cast steel
one piece, internal balance 3.75 crank. Its not very
expensive, if I remember right believe motorhead used
one in his 550hp 406.
Guess its to late now to talk you into the cast steel
one piece, internal balance 3.75 crank. Its not very
expensive, if I remember right believe motorhead used
one in his 550hp 406.
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From: All humans are vermin in the eyes of Guru VA
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I got the same speech on the use of Ma'am.
I got a sweet deal on a GM forged crank.
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From: All humans are vermin in the eyes of Guru VA
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I have 3.55s at the moment. I am considering 3.9 or a 4.11.
with the M21 I have if I set the redline to 7000rpm even with the 4.11s I can hit 60 in first gear.
I am leaning towards 3.9 because I can still use my 3 series carrier and have it rebuilt.
with the M21 I have if I set the redline to 7000rpm even with the 4.11s I can hit 60 in first gear.
I am leaning towards 3.9 because I can still use my 3 series carrier and have it rebuilt.
Le Mans Master
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Is your 3.55 rear in good shape.
Le Mans Master
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From: All humans are vermin in the eyes of Guru VA
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Wouldnt the long duration camshaft like the higher RPMs on the highway?
This is what Crane says about the cam
My Highway RPMs would be 2400-3300rpm.
This is what Crane says about the cam
ROUGH IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/3000+ CONVERTER, 3800-4600 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
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From: All humans are vermin in the eyes of Guru VA
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JustinD bought a good wide ratio 2.64 super T-10 off a forum member.
Last edited by Little Mouse; Oct 5, 2008 at 01:43 PM.
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From: All humans are vermin in the eyes of Guru VA
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There are a couple on ebay now. When I get ready to buy a transmission I should readily be able to find one.
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a little on the cammy side to pick up the spreads.
9.37 low gear is pretty good not far off that 10.00 magic number lol.
Last edited by Little Mouse; Oct 5, 2008 at 02:42 PM.
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From: All humans are vermin in the eyes of Guru VA
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Interestingly enough the drag2000 has the car doing the 1/4 mile faster with the Super T10 and a 3.55 rearend than a Muncie M21 and a 3.9.
10.573 versus 10.619
10.573 versus 10.619
Last edited by Guru_4_hire; Oct 5, 2008 at 03:58 PM.