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 13Likes
06-07-2014, 08:27 PM
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CC Member
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Join Date: Aug 2013
Location: Canandaigua,
NY
Cobra Make, Engine: SPF MKII Riverside Racer FIA
Posts: 2,507
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Not Ranked
Brent,
Looking forward to some pictures and more detail as the build progresses. It is amazing how much low end torque some of our engines have. Going through town is manageable, but it is on those windy roads that we really get to experience what the engine can do.
I thought that about 10.5 was the max that you could go on pump gas. Did not realize that you could go up to 10.8.
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06-08-2014, 07:19 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
The block is on it's way and will spend several weeks in the machining queue.
1795, there are a lot of variables involved including chamber design, cam specs, and even the area where the engine will be shipped.
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06-11-2014, 10:19 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Oliver rods are on the way.
Ferrea valves are ordered. Having Keith put 5/16" guides in the heads.
Camshaft is also ordered. Custom Bullet Cams billet solid roller, 270/280 @ .050", .440" lobe lift.  |
06-11-2014, 12:50 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Quote:
Originally Posted by blykins
Oliver rods are on the way.
Ferrea valves are ordered. Having Keith put 5/16" guides in the heads.
Camshaft is also ordered. Custom Bullet Cams billet solid roller, 270/280 @ .050", .440" lobe lift. |
Great parts. Those are light, skinny valves Dude; what are the face sizes?
Are you going for his new 'golf ball' port textures? 
__________________
Chas.
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06-11-2014, 01:02 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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2.250/1.750.
Valves won't be here for about 3 weeks since they are custom pieces, so we'll see if Keith has his new head machine up and running by then. The heads flow 360/370 with the existing program, so I'm not sure if there is much room for improvement...
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06-11-2014, 01:50 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Quote:
Originally Posted by blykins
2.250/1.750.
The heads flow 360/370 with the existing program, so I'm not sure if there is much room for improvement...
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If you meant 360 and 270-that makes sense. A typo buddy?
Or do you mean the intakes flow between 360 and 370?
__________________
Chas.
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06-11-2014, 01:57 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I meant between 360-370 on the intake side.
Tony sent me a flow sheet from a typical Stage 3 head:
.3 212 172
.4 268 210
.5 313 240
.6 331 266
.7 353 276
.8 371 281
.9 376 285
Those are with the 11/32" valves that they normally use. The 5/16" stem valves will be lighter, which will be good since it will allow me to drop the spring pressures down a tad, plus the smaller stems *may* add a few cfm to the mix.
If you extrapolate the flow numbers up above for a .750" net valve lift, you'd be somewhere around the low 360's on the intake side and high 270's on the exhaust side.
Keith will flow these actual heads for me so we can see where we are with the smaller valves, and I usually flow them here as well when I get them. Not that I don't trust Keith, but it's good to compare flow benches/dynos/etc when possible. So far, the SF600 that I have access to has been pretty much dead on with Keith's SF1020.
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06-11-2014, 01:02 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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I can't wait for those gratuitous rod bearing pics. Ooohweee baby!  |
06-11-2014, 01:04 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Rod, I'll take some rod bearing pictures just for you....ever seen a coated bearing?  |
06-11-2014, 02:11 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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I guess that should have been interpolate instead of extrapolate.
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06-16-2014, 09:22 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
On my second bag of popcorn.
__________________
I'm a writer, feed the artist and buy a book.
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06-16-2014, 09:35 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Why do you need the popcorn? If the popcorn is because of the subject matter, then I agree...I find myself standing and staring at the goodies myself. If it's because of the discussion between rick and me, then popcorn is not needed. Rick is a buddy and customer of mine and even though we disagree on a select few topics, I have a good respect for him.
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06-13-2014, 04:06 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
For Rod....
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06-13-2014, 04:40 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Do you scuff them a little or use as-is?
__________________
Chas.
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06-13-2014, 04:44 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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As is....
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06-13-2014, 06:23 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Overkill for Cobras but do you have much call for DFL coated bearings? Or that just 'Cup and ProStock stuff? I remember Mahle offered most piston tops and lands coated.
Are those Kings?
__________________
Chas.
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06-13-2014, 06:41 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
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This is about the extent of the coated bearings that I use. These are clevites. What's fun is that I have to keep standard, .001", and "X" bearings on the shelf so the clearances can be adjusted. At $150 for a set of coated main bearings, it can add up.
Mahle pistons have the skirts and crowns coated, they are nice pistons. This build will get a custom set of diamonds which will be lightened, coated, and will feature a custom ring pack size.
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06-13-2014, 07:25 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Quote:
Originally Posted by blykins
This is about the extent of the coated bearings that I use. These are clevites. What's fun is that I have to keep standard, .001", and "X" bearings on the shelf so the clearances can be adjusted. At $150 for a set of coated main bearings, it can add up.
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As Purchasing guy, I had to track and order those for SBC, BBC, SBF, Hemi, Wedge and LSX.
Marketing was cake compared to that... 
Nice parts choices for this build-shooting for 680-695?
__________________
Chas.
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06-13-2014, 10:12 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Oh man. Those are beau-ti-ful. I'm not a smoker, but boy, I sure could use a cigarette. |
06-15-2014, 04:47 AM
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CC Member
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Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
Posts: 3,841
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What is this motor for?
bylkins Brent I see you are looking for 7,000 rpms and high HP. Doesn't your buyer know that TORQUE moved his car and HP is just a by product.
If looking for a quick revving motor, going to titanium rods would save alot of weight a\or even aluminum rods if he is told about heating up the motor first before beating on it. Are you going with a roller bearing motor for the camshaft? Lifters are .904"? Pac and Comp have new beehive springs out but are limited in the .700" lift range with a min coil bind.
I don't see why guys are not looking at 4.280 bore motors with 4.375 crank shafts. We have a couple of guys here racing and these motors make stupid power 760-800 hp and also run to 7,000 rpms but not recommended. Piston speed gets a little high. This is my next motor with TWM 58mm
I also have a set of stage 3 heads with KC ports. I got 368 on intake with 11/16 valves. I am looking at 8mm intake valves at 2.25". will stay with 11/16 on exhaust. I don't see a great differents between the 2 unless more work is done on multi vale angles. The valve where not back cut only 3 angle setup. You can pickup 5-10 cfm in the low range with cut back. I am going with a little stronger beehive than the old 126 springs for BBC motors. These springs do drop off at about 5,800 rpms with hydro lifters. Trick here is to have them pump up and run total.015" valve lash. They will still lose power to 6,200 but not like the correct adjustment or hit the pistons. The other help is running 75-80 psi of oil pressure.
Hope your guy is going dry sump or an accusump pre oiler. Sound like a good build. Looking forward to seeing it. Rick. Ps that street twim works great. Going to buy another one for TA.
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