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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3098902
12/02/22 11:37 AM
12/02/22 11:37 AM
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Joined: Mar 2011
Posts: 3,093
Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,093
Michigan
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Last numbers I was given from a set were 346 at 7, 348 at 8. Exhaust were 229 at 7, 232 at 8. 2.14/1.81. 4.38 bore
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Re: street/strip 511" build with dyno results
[Re: dvw]
#3098909
12/02/22 11:57 AM
12/02/22 11:57 AM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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I ran out of tape for the seats but the lap belt clicks in really good (Doug makes good points as always).
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Re: street/strip 511" build with dyno results
[Re: HardcoreB]
#3098911
12/02/22 12:01 PM
12/02/22 12:01 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Unless you wanted to run totally N/A I don't feel like there's bang for the buck having them cnc'd. I'd think there is that same '40HP' or so just doing a few hours of MW opening to the intake runners and then using a MW intake which would carry power further. It's a strong build for unported stealth heads! Them being small and that you were using low compression for pump, AND in consideration of the valvetrain; I may have missed on the cam by 5HP and for that I'm so sorry  . I'd have thought it would have power peaked about 200 higher but not exactly sure where the ICL is at currently. I'd bet moving it would shift peak for sure. I don't recall if you mentioned how much spark adv made the best power? For whatever reason, your builds go relatively unnoticed (and maybe that is your goal) but they are impressive relative to the parts you're using. Again overall GOOD JOB! Thank you for the support. I figured on struggling to find 600hp with the unported heads. I have one more set of Stealths to mess with so we will have to make plan for those. What didn't we like on the valvetrain? I sure wish the crane steel rockers came with more ratio options.
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Re: street/strip 511" build with dyno results
[Re: Brad_Haak]
#3098913
12/02/22 12:04 PM
12/02/22 12:04 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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master
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Posts: 9,100
Rogue River, OR
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I haven't read everybody's responses, so this may have been mentioned already...
It's only a "narrow" power curve if all you do is compare the HP peak RPM with the torque peak RPM. If you look at where the torque is > 550 lb-ft, the answer is "almost everywhere".
I think the HP NA is maxed w/ the unported heads; if you port the heads, the next restriction is that intake. If you always spray it to your horsepower goal, I don't see the point in changing what you have now.
Does that car have to pass tech to race where you do? I don't see much there that says you do... It has a battery hold down, two throttle springs and I tossed the Yosemite Sam floor mats when we got the car. Are they supposed to be checking for something else? Thanks for sharing your thoughts on the hp/tq. Good food for thought!
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Re: street/strip 511" build with dyno results
[Re: A727Tflite]
#3098914
12/02/22 12:06 PM
12/02/22 12:06 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Last numbers I was given from a set were 346 at 7, 348 at 8. Exhaust were 229 at 7, 232 at 8. 2.14/1.81. 4.38 bore Whoa! I had no idea. My understanding was 320@.700. Thank you for sharing that info.
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Re: street/strip 511" build with dyno results
[Re: Blusmbl]
#3098917
12/02/22 12:10 PM
12/02/22 12:10 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Thank you Nick it has been a humorous and entertaining journey. There are so many facets to gettijg a csr like this to work half way right sometimes I am like a blind man trying to open a can of beans with a swiss army knife.
I am looking forward to seeing where your fury upgrade goes. These street cars can be pretty darn fun with a little nitrous don't you think? That's a fantastic quote!!! It's super cool, there isn't anything more exciting than a quick manual trans Mopar. It should really, really fly on the hose! My car is overcammed for n/a work, but it worked great on the nitrous. It picked up 1.2-ish seconds on only a 73 jet, the added duration really helps. It's addicting for sure, doing caltracs/monos/vikings on all 4 corners this winter, and am going to possibly upgrade the fuel system so I can feel safe spraying 225+... at least from a tune standpoint, not from a stock LY rods and six pack pistons standpoint, lol The LY rods in my GTS looked mint other than #4 which bent due to the cylinder splitting and filling with a coolant. Bearings looked perfect on all mains and rod bearings. I was really surprised by that. Looking forward to seeing how much you pick up with a suspension upgrade on the Fury!
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3098920
12/02/22 12:14 PM
12/02/22 12:14 PM
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Joined: Dec 2021
Posts: 1,166
Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,166
Loudoun County, VA
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It has a battery hold down, two throttle springs and I tossed the Yosemite Sam floor mats when we got the car.
Are they supposed to be checking for something else?
Safety belts Scatter shield (4-speed) Roll bar or cage (bar >= 10.00; cage <10.00) Driveshaft loop Driver's jacket ... and the list gets longer as the car gets faster Or are you running at an "outlaw" track that doesn't really bother w/ tech inspection per the NHRA/IHRA rules?
Last edited by Brad_Haak; 12/02/22 12:20 PM.
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3098922
12/02/22 12:17 PM
12/02/22 12:17 PM
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Joined: Dec 2021
Posts: 1,166
Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,166
Loudoun County, VA
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Last numbers I was given from a set were 346 at 7, 348 at 8. Exhaust were 229 at 7, 232 at 8. 2.14/1.81. 4.38 bore Whoa! I had no idea. My understanding was 320@.700. Thank you for sharing that info. They only claimed around 320-ish, so I have no idea where 340++ #s would come from... The last CNC Stealths I saw tested (Dwayne posted something about them in the last year or so) didn't even get to 320; MCH isn't doing the work any longer, so the additional blending & CNC chamber work that goes along with the basic CNC work to the ports alone isn't being done any more, IIRC.
Last edited by Brad_Haak; 12/02/22 12:19 PM.
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: street/strip 511" build with dyno results
[Re: Brad_Haak]
#3098923
12/02/22 12:21 PM
12/02/22 12:21 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Safety bellhousing, billet flywheel....check
Driveshaft loop....check
I will have to double check on the rest of that list lol
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3098924
12/02/22 12:32 PM
12/02/22 12:32 PM
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Joined: Jan 2003
Posts: 4,091
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,091
Shelby Twp. Mi
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Last numbers I was given from a set were 346 at 7, 348 at 8. Exhaust were 229 at 7, 232 at 8. 2.14/1.81. 4.38 bore Whoa! I had no idea. My understanding was 320@.700. Thank you for sharing that info. Yeah i dont think you'll see 340+ cfm out of a 2.14 Stealth that is remotely affordable. Call the numbers however you want but ported you'd do REALLY well to get over 700 on a decent motor build similar to this.
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3098925
12/02/22 12:35 PM
12/02/22 12:35 PM
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Joined: Jan 2003
Posts: 4,091
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,091
Shelby Twp. Mi
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I would not be surprised if you find another 40 hp with a bigger manifold and well-ported heads. Do you know what the flow nu,bers for a CNC ported stealth look like? Who has the best program? Unless you wanted to run totally N/A I don't feel like there's bang for the buck having them cnc'd. I'd think there is that same '40HP' or so just doing a few hours of MW opening to the intake runners and then using a MW intake which would carry power further. It's a strong build for unported stealth heads! Them being small and that you were using low compression for pump, AND in consideration of the valvetrain; I may have missed on the cam by 5HP and for that I'm so sorry . I'd have thought it would have power peaked about 200 higher but not exactly sure where the ICL is at currently. I'd bet moving it would shift peak for sure. I don't recall if you mentioned how much spark adv made the best power? For whatever reason, your builds go relatively unnoticed (and maybe that is your goal) but they are impressive relative to the parts you're using. Again overall GOOD JOB! Thank you for the support. I figured on struggling to find 600hp with the unported heads. I have one more set of Stealths to mess with so we will have to make plan for those. What didn't we like on the valvetrain? I sure wish the crane steel rockers came with more ratio options. The valvetrain is good and matched for what your doing but there is better like HS and TD paired etc. but again that all goes into consideration in the whole scheme.
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Re: street/strip 511" build with dyno results
[Re: HardcoreB]
#3098936
12/02/22 01:21 PM
12/02/22 01:21 PM
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Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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What are the performance targets for the car?
On spray and N/A?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: street/strip 511" build with dyno results
[Re: fast68plymouth]
#3098963
12/02/22 03:30 PM
12/02/22 03:30 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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What are the performance targets for the car?
On spray and N/A? N/A - snappin necks On spray - cashin checks!
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3099006
12/02/22 05:17 PM
12/02/22 05:17 PM
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Joined: Jan 2003
Posts: 17,907
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,907
S.E. Michigan
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340+ cfm stealth heads?
Just when I thought I'd seen everything
Rich H.
Esse Quam Videri
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Re: street/strip 511" build with dyno results
[Re: ZIPPY]
#3099126
12/03/22 01:18 AM
12/03/22 01:18 AM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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340+ cfm stealth heads?
Just when I thought I'd seen everything Has anyone ever seen a set of functioning "super stealths" ? I recollect them having flow numbers reported in the 340 range. The intake port wall looked very thin on one side from the pics in 440sources ad.
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3099129
12/03/22 02:21 AM
12/03/22 02:21 AM
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Joined: Aug 2011
Posts: 2,872
Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
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340+ cfm stealth heads?
Just when I thought I'd seen everything Has anyone ever seen a set of functioning "super stealths" ? I recollect them having flow numbers reported in the 340 range. The intake port wall looked very thin on one side from the pics in 440sources ad. They have 440 size ports, but the pinch is moved over so .650 offset intake rockers must be used, I ported mine & are Max wedge size, Mine flow in the 340's , had them on my junk for many years
Last edited by csk; 12/03/22 02:29 AM.
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5
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Re: street/strip 511" build with dyno results
[Re: CSK]
#3099142
12/03/22 07:57 AM
12/03/22 07:57 AM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
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OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Very cool! I want a set! I dont think they still sell the super version?
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Re: street/strip 511" build with dyno results
[Re: Jeremiah]
#3099148
12/03/22 09:30 AM
12/03/22 09:30 AM
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Joined: Mar 2011
Posts: 3,093
Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,093
Michigan
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340+ cfm stealth heads?
Just when I thought I'd seen everything Has anyone ever seen a set of functioning "super stealths" ? I recollect them having flow numbers reported in the 340 range. The intake port wall looked very thin on one side from the pics in 440sources ad. These were done by MCH - All I know is what I saw on the flow test sheet. Don’t know if they require special rockers or not.
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