Desktop Dyno request thread
Melting Slicks
Joined: Mar 2005
Posts: 2,187
Likes: 7
From: Chetwynd B.C.
re post in case you missed it.
Glad to see you're back Billa. It's fun watching this thread and scoping out all the different engines and cams. My engine builder is suggesting the Comp Cam XR264HR: This is VERY likely what we will go with.
HYDRAULIC ROLLER-
264 270 Adv. Dur.
212 218 Dur. @ .050
.510 .510 lift
110° lobe seperation
The link to the cam for better/more specs. http://store.summitracing.com/partde...8&autoview=sku
My engine specs are as follows:
LS5 454 BBC
bored .030 over. Stock stroke, and stock rod length.
Forged pistons
Cylinder heads… Chev… 3964290 101cc chamber oval closed. (shaved 12 thous)
Intake Valve: 2.19 undercut
Exhaust Valve 1.72 undercut
Rocker ration 1.72 ratio
Compression: 10.3:1
Carb: Holley Street Avenger 770
Aluminum Edelbrock Performer RPM Intake manifold (# 7161 12105)
Exhaust: 2 ½” Headman headers
I know you are going to have difficult with the flow numbers and guess at the impact of the larger valves but do what you can please. Thanx
shmoky
HYDRAULIC ROLLER-
264 270 Adv. Dur.
212 218 Dur. @ .050
.510 .510 lift
110° lobe seperation
The link to the cam for better/more specs. http://store.summitracing.com/partde...8&autoview=sku
My engine specs are as follows:
LS5 454 BBC
bored .030 over. Stock stroke, and stock rod length.
Forged pistons
Cylinder heads… Chev… 3964290 101cc chamber oval closed. (shaved 12 thous)
Intake Valve: 2.19 undercut
Exhaust Valve 1.72 undercut
Rocker ration 1.72 ratio
Compression: 10.3:1
Carb: Holley Street Avenger 770
Aluminum Edelbrock Performer RPM Intake manifold (# 7161 12105)
Exhaust: 2 ½” Headman headers
I know you are going to have difficult with the flow numbers and guess at the impact of the larger valves but do what you can please. Thanx
shmoky
Last edited by shmoky; Nov 2, 2007 at 11:54 PM. Reason: added link to cam specs
Pro
Joined: Oct 2007
Posts: 587
Likes: 0
From: Overland Park Kansas
Great information - THANK YOU; this really makes the process quick and painless 
Nice engine - very sweet torque and HP curve. That "doink" in the torque curve is giving me fits and I'm working with the DD folks.
The carb seems kinda big unless you'll be turning it high; the formula I use is CFM = ((CI x RPM)/3456) x VE...given that you won't need that carb until 7500 RPM or so.
Nice engine - very sweet torque and HP curve. That "doink" in the torque curve is giving me fits and I'm working with the DD folks.
The carb seems kinda big unless you'll be turning it high; the formula I use is CFM = ((CI x RPM)/3456) x VE...given that you won't need that carb until 7500 RPM or so.
Awesome. Thanks a ton for running the sim for me
I was hoping for better HP numbers, around the 460 range, but I guess we'll see if I ever get it on a dyno. As far as the carb, what size would you recommend, and are there any advantages to going smaller? And if so, which brand / setup do you recommend? I'm still a newb to carb cars so I'll take any advice I can get to increase performance and/or gas mileage
Thanks again!
Last edited by neuroclast; Nov 3, 2007 at 01:00 AM.
Instructor
Joined: Aug 2007
Posts: 224
Likes: 1
From: SHERMAN TEXAS
thanks billa for your time. this will influence my cam choice. that cam seemed to be the best suitable for my a/t and 308 rears for now. if you have a better cam in mind im willing to try it out. thanks again colin75
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Comp Cam XR264HR
The link to the cam for better/more specs. http://store.summitracing.com/partde...8&autoview=sku
My engine specs are as follows:
LS5 454 BBC
bored .030 over. Stock stroke, and stock rod length.
Forged pistons
Cylinder heads… Chev… 3964290 101cc chamber oval closed. (shaved 12 thous)
Intake Valve: 2.19 undercut
Exhaust Valve 1.72 undercut
Rocker ration 1.72 ratio
Compression: 10.3:1
Carb: Holley Street Avenger 770
Aluminum Edelbrock Performer RPM Intake manifold (# 7161 12105)
Exhaust: 2 ½” Headman headers
The link to the cam for better/more specs. http://store.summitracing.com/partde...8&autoview=sku
My engine specs are as follows:
LS5 454 BBC
bored .030 over. Stock stroke, and stock rod length.
Forged pistons
Cylinder heads… Chev… 3964290 101cc chamber oval closed. (shaved 12 thous)
Intake Valve: 2.19 undercut
Exhaust Valve 1.72 undercut
Rocker ration 1.72 ratio
Compression: 10.3:1
Carb: Holley Street Avenger 770
Aluminum Edelbrock Performer RPM Intake manifold (# 7161 12105)
Exhaust: 2 ½” Headman headers
Only comment is that the cam seems pretty mild given what I'd expect for flow numbers from those heads. I'm definitely not BBC guy - I've only built 5 or so and most of those have been pretty mild - but it seems like there's a LOT of flow beyond .500 lift, especially for a hydraulic roller. Going with an XR294HR tickled 500HP - probably TOO much for nice street manners. DEFINITELY not questioning your builder at all - they have the numbers to pick the right cam...only a comment from my limited view.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
How 'bout the Isky cams with Awilsons combo?
So how 'bout my request for the DD on the Isky cams with Awilson's 383" combo using stock heads?"I would like to see how an Isky 270-Mega-cam would look on a DD - 270*/221*@.050"/108*LSA/.465"lift single pattern and maybe the 264 Mega - 264*/214*@0.05"/108*LSA/.045"lift. Then the same cams again but with 106* LSA. "
Very curious to see how they compare to the CC XE262/268 or the Crane cams (114142 Powermax, 2050 grind 216/228 454/480 112 LSA) he listed?
He may have stopped posting on that thead but it would make a usefull comparsion for the rest of us.
cardo0
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Schmoky, REALLY sorry for missing you in the shuffle - thanks for the PM! I definitely wasn't ignoring you, occasionally I just get lost in the threads
Only comment is that the cam seems pretty mild given what I'd expect for flow numbers from those heads. I'm definitely not BBC guy - I've only built 5 or so and most of those have been pretty mild - but it seems like there's a LOT of flow beyond .500 lift, especially for a hydraulic roller. Going with an XR294HR tickled 500HP - probably TOO much for nice street manners. DEFINITELY not questioning your builder at all - they have the numbers to pick the right cam...only a comment from my limited view.
Only comment is that the cam seems pretty mild given what I'd expect for flow numbers from those heads. I'm definitely not BBC guy - I've only built 5 or so and most of those have been pretty mild - but it seems like there's a LOT of flow beyond .500 lift, especially for a hydraulic roller. Going with an XR294HR tickled 500HP - probably TOO much for nice street manners. DEFINITELY not questioning your builder at all - they have the numbers to pick the right cam...only a comment from my limited view.
The recomended XR 264 HR cam seems a lot too small for a 10.3 to 1 big block.
XR274HR Better.
Last edited by 63mako; Nov 3, 2007 at 03:11 PM.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
IMHO a 650 or 700 is fine, but you can stick with what you have. I don't have a strong preference for brands - any carb works if it's working properly and tuned. Either way, invest in a good dyno tune and you'll be happy.
Melting Slicks
Joined: Mar 2005
Posts: 2,187
Likes: 7
From: Chetwynd B.C.
Thanx a bunch Billa. Your numbers are pretty close to what my builder said they would be. I asked him if he could run the flow numbers but they don't have a machine for that. I think the XR294HR would lose some on the bottom end torque wouldn't it? The numbers say the operating range is 1800 to 5800 VS 1200-5200 on the XR264HR. BUT maybe that wouldn't be too bad. If you have a file with the XR294HR dyno run on it could you please either post it or email it to me? I would love to have a look at it. ( cschmok@yahoo.com ) Now you have me thinking again. (damn look at all the choices )What about the XR274HR or any of the above and playing around with the lobe seperation a little.
I'm looking at getting 500HP or real close to it. With a fairly flat torque curve from 1500 - 5000 rpm. Is this even possible? Or am I dreaming? I also don't want to run the motor higher than 5500 rmp. (eek: the closer I look at this the more I think I am dreamin') As mentioned before it will be a hi-way cruiser mostly but do want the low end torque so when I go to the track a couple of times a year I won't be too embarassed.
Thanx again,
shmoky
Your numbers are pretty close to what my builder said they would be. I asked him if he could run the flow numbers but they don't have a machine for that. I think the XR294HR would lose some on the bottom end torque wouldn't it? The numbers say the operating range is 1800 to 5800 VS 1200-5200 on the XR264HR. BUT maybe that wouldn't be too bad. If you have a file with the XR294HR dyno run on it could you please either post it or email it to me? I would love to have a look at it. ( cschmok@yahoo.com ) Now you have me thinking again. (damn look at all the choices )What about the XR274HR or any of the above and playing around with the lobe seperation a little. I'm looking at getting 500HP or real close to it. With a fairly flat torque curve from 1500 - 5000 rpm. Is this even possible? Or am I dreaming? I also don't want to run the motor higher than 5500 rmp. (eek: the closer I look at this the more I think I am dreamin') As mentioned before it will be a hi-way cruiser mostly but do want the low end torque so when I go to the track a couple of times a year I won't be too embarassed.
Thanx again,
shmoky
Last edited by shmoky; Nov 3, 2007 at 05:26 PM.
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Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
IMHO it's not so much the cam choice as just the heads are pretty mondo for your overall combination. My concern with more cam is that you'd use more of the capability of the heads, but it'd be a dog off-idle to 2500 RPM or so...and with those gears and an AT it's definitely a concern. I'm happy to dig in a little deeper if you want me to really look at this.
Instructor
Joined: Aug 2007
Posts: 224
Likes: 1
From: SHERMAN TEXAS
Im In Process Of Piecing My Topend Back Together. Im Looking For Cam Recommendations That Will Still Run Vacume Acc. I Will Be Buying Roller Rockers And 2000 Stall. I Dont Think Ill Be Revving Past 5500 . Maybe After A Few Colorado Koolaids. Mainly Looking For Good Pull And Throttle Response. Thanks Colin75
Burning Brakes
Joined: Nov 2004
Posts: 821
Likes: 0
From: Ontario
Billla could you run this combo please.
350 4 bolt, TRW flat top pistons, Bowtie, Phase 2, iron 14011034 heads, angle plug, 64cc, 2.02-1.6, 184cc, Lunati 60103 cam, duration @ .050 IN/EX: 227/233;Lift IN/EX: .489"/.504";LSA / ICL: 110/106;RPM Range: 1800-6200, RPM Air Gap manifold with a Street Avenger 770 carb.
Thanks
350 4 bolt, TRW flat top pistons, Bowtie, Phase 2, iron 14011034 heads, angle plug, 64cc, 2.02-1.6, 184cc, Lunati 60103 cam, duration @ .050 IN/EX: 227/233;Lift IN/EX: .489"/.504";LSA / ICL: 110/106;RPM Range: 1800-6200, RPM Air Gap manifold with a Street Avenger 770 carb.
Thanks
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Im In Process Of Piecing My Topend Back Together. Im Looking For Cam Recommendations That Will Still Run Vacume Acc. I Will Be Buying Roller Rockers And 2000 Stall. I Dont Think Ill Be Revving Past 5500 . Maybe After A Few Colorado Koolaids. Mainly Looking For Good Pull And Throttle Response. Thanks Colin75
If you're not turning over 5500, you definitely don't need roller rockers - roller tip, maybe.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Your numbers are pretty close to what my builder said they would be.
I think the XR294HR would lose some on the bottom end torque wouldn't it? If you have a file with the XR294HR dyno run on it could you please either post it or email it to me? What about the XR274HR or any of the above and playing around with the lobe seperation a little.
I'm looking at getting 500HP or real close to it. With a fairly flat torque curve from 1500 - 5000 rpm. I also don't want to run the motor higher than 5500 rmp. As mentioned before it will be a hi-way cruiser mostly but do want the low end torque so when I go to the track a couple of times a year I won't be too embarassed.
I think the XR294HR would lose some on the bottom end torque wouldn't it? If you have a file with the XR294HR dyno run on it could you please either post it or email it to me? What about the XR274HR or any of the above and playing around with the lobe seperation a little.
I'm looking at getting 500HP or real close to it. With a fairly flat torque curve from 1500 - 5000 rpm. I also don't want to run the motor higher than 5500 rmp. As mentioned before it will be a hi-way cruiser mostly but do want the low end torque so when I go to the track a couple of times a year I won't be too embarassed.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
[B]
350 4 bolt, TRW flat top pistons, Bowtie, Phase 2, iron 14011034 heads, angle plug, 64cc, 2.02-1.6, 184cc, Lunati 60103 cam, duration @ .050 IN/EX: 227/233;Lift IN/EX: .489"/.504";LSA / ICL: 110/106;RPM Range: 1800-6200, RPM Air Gap manifold with a Street Avenger 770 carb.
350 4 bolt, TRW flat top pistons, Bowtie, Phase 2, iron 14011034 heads, angle plug, 64cc, 2.02-1.6, 184cc, Lunati 60103 cam, duration @ .050 IN/EX: 227/233;Lift IN/EX: .489"/.504";LSA / ICL: 110/106;RPM Range: 1800-6200, RPM Air Gap manifold with a Street Avenger 770 carb.
Burning Brakes
Joined: Nov 2004
Posts: 821
Likes: 0
From: Ontario
Crank 3.75" Stroke, Pistons TRW Forged Flat Top, Rods 5.7"
headers and 2.5 underbody exhaust.
Hope this helps
Thanks Ratsirt
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
350 4 bolt, Bowtie, Phase 2, iron 14011034 heads, angle plug, 64cc, 2.02-1.6, 184cc, Lunati 60103 cam, duration @ .050 IN/EX: 227/233;Lift IN/EX: .489"/.504";LSA / ICL: 110/106;RPM Range: 1800-6200, RPM Air Gap manifold with a Street Avenger 770 carb.
Crank 3.75" Stroke, Pistons TRW Forged Flat Top, Rods 5.7"
headers and 2.5 underbody exhaust.
Crank 3.75" Stroke, Pistons TRW Forged Flat Top, Rods 5.7"
headers and 2.5 underbody exhaust.
Melting Slicks
Joined: Mar 2005
Posts: 2,187
Likes: 7
From: Chetwynd B.C.
As colin75 says you're a great man to have on this site. Your knowledge, experience and willing to help is a definet benefit for its members. You've given me some things to think about and WILL discuss them with my builder. Thanx for your help and input.
shmoky
PS I take it you didn't have the file of the DD run on the XR294HR. If by chance you do please post or email to me at cschmok@yahoo.com
thanx
shmoky
PS I take it you didn't have the file of the DD run on the XR294HR. If by chance you do please post or email to me at cschmok@yahoo.com
thanx