Re: Advice on building a 525 hp 416. Combos and costs.
[Re: gtsdon]
#1079758
09/21/11 12:49 PM
09/21/11 12:49 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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Quote:
Looking to build a 525 hp (416) stroker and would like input pertaining to proven combos and expected costs. Motor will be street and strip (mostly street) so it must run on pump gas. Parts I have to work with- 340 block, 30 over with mains studded. Scat H-Beam rods E- Heads, ported with crane gold roller rockers. RPM Air gap intake with 750 HP Holley carb. Headman headers with 3” exhaust and flowmasters 10” 3500 Turbo Action converter built 727 Trans. 430 rear gears with 29” tall tires All will be installed in a 3500 lb Dart. Any input, lessons learned etc would be appreciated.
The 750 carb will probally struggle to get there, a 850 won't Been there done that with a lower compression pump gas W2 headed 418 for ninesecondPhil several years back the rest looks good, I would go with what you got and IF your not happy with the results, add a bigger carb later The 750 will drive nice on the street but choke the motor down in the upper RPMs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: gtsdon]
#1079765
09/22/11 12:59 PM
09/22/11 12:59 PM
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Joined: Aug 2003
Posts: 3,245 Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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Quote:
What do you guy’s think about the converter? I am currently running it behind my 340 and it works great. Just not sure if it will be right for a 4” crank. Also, I believe the Headman headers will need to be upgraded. Unfortunately, the header flanges are a bit smaller than the exhaust ports of the heads causing restrictions. If I run the current headers how much HP do you think will be lost?
The converter should "loosen up" quite a bit with the added torque of the 4" crank. Best thing to do before the new motor goes in is to sent to a GOOD converter guy, telling him the new combo.
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: gtsdon]
#1079766
09/22/11 01:00 PM
09/22/11 01:00 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
top fuel
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top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Don , put a 4" arm in that dude and you will never go back. I love the power they make.
6.50 @105.26
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: Kindafast]
#1079767
09/22/11 03:19 PM
09/22/11 03:19 PM
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Joined: Aug 2006
Posts: 2,141 junction city oregon
viperblue72
top fuel
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top fuel
Joined: Aug 2006
Posts: 2,141
junction city oregon
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Mine was 3200 pound duster w/out me 408 cast mopar crank Eagle h beams Wiseco pistons 10.7 comp. Xe286 solid roller Indybrocks Victor intake 950 holley 3k stall 4.10 gears. I went 11.0@122 with a 1.65 60ft. I only ran 2 passes with this combo so no tuning. Sold the motor. Guy I sold it to put in a 264@050 cam and went 126 mph.
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: Kindafast]
#1079768
09/22/11 05:31 PM
09/22/11 05:31 PM
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Joined: Aug 2003
Posts: 3,245 Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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Quote:
Don , put a 4" arm in that dude and you will never go back. I love the power they make.
Granted not a street car, but I was STUNNED that my 416 with RHS heads would go 10.30's first time out and a best of 10.14 at 3100#! Also, of note best 1/8 mph is 107 and change. Must have some decent mid-range power...
LOVE the 4" crank small blocks!!
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: 11secaarcuda]
#1079770
09/23/11 08:21 PM
09/23/11 08:21 PM
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Joined: Aug 2008
Posts: 941 Texas, USA
ChrgrCuda
super stock
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super stock
Joined: Aug 2008
Posts: 941
Texas, USA
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68 Barracuda Notchback. Full interior, street legal. Only fiberglass 6 pack hood. All rest steel. 10.86@122 on DOT Hoosiers. 360 Magnum 4" Stroker crank Eagle Rods 10.8:1 compression Hydraulic Roller .555 and .565 lif, 256@.050Edelbrock Magnums with SDSS Stg II port job, 57 cc chambers Mopar Magnum M-1 ported 2"Wilson Spacer QF 950 DP TTI 1 5/8 headers 4000 Ultimate Converter 998 with CRT RMVB 4.11 8 3/4
68 Cuda Notchback [Email]10.86@120[/Email]
69 Charger R/T 440/505
2009 Challenger SRT8
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Re: Advice on building a 525 hp 416. Combos and costs.
[Re: 11secaarcuda]
#1079771
09/23/11 08:51 PM
09/23/11 08:51 PM
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Joined: Aug 2003
Posts: 3,245 Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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Quote:
Quote:
Quote:
Don , put a 4" arm in that dude and you will never go back. I love the power they make.
Granted not a street car, but I was STUNNED that my 416 with RHS heads would go 10.30's first time out and a best of 10.14 at 3100#! Also, of note best 1/8 mph is 107 and change. Must have some decent mid-range power...
LOVE the 4" crank small blocks!!
Your combo please including transmission, gears, etc. Please tell me more about your cylinder heads.
Trans is 904 (no T-brake) with custom 8" converter 4.56 gears with a 29.5 tire (Would like to try 4.30's)
Motor is a run-of-the-mill deal, KB flat tops (12.2), SCAT I beam rods, custom Bullet solid (NON roller) cam, OLD Victor and an even older Holley 800 that was rubbed on to flow 848 cfm from stock at 802.
Heads are 2.02 RHS LA heads. They were inproved about 10 cfm from the supplier (bought them complete) but the peak numbers are nothing that most guys here would brag about: 268 at .600, stalling and starting to go backwards after .650". Would the car go 9.90's with a "race" head and the correct cam/converter, most likely but you cannot beat these heads for the money.
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