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#1
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400 Engine Build
Moving along nicely with our 400 (412cid) engine build. I'll be putting some pics up over the next few days.
The engine has Eagle rods, Icon Flat tops, std/std "N" crank, and topped with #46 heads from a 1969 428. Compression ratio is 10.65 to 1, and will be tuned for and run on pump gas only. The heads are well prepared, screw in studs and 2.11/1.77 valves, around 240 cfm. We're using a "coated" (Ion-Bond) Crower 60919 cam, ICL at 108.5, and Rhoads V-Max lifters and Harland Sharp 1.65 rocker arms. It's going into my Ventura for run-in and a couple track outings, then headed for a 67 GTO 4 speed car with 4.30 gears. Should be quite a ride!......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
#2
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Alrighty!!!
Been waiting on this one, for a while!!!
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#3
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U guys going to run headers ?
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#4
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Cliff when I swapped the 400 in my car in place of a 455 it felt like a dog until it got more convertor and more gear. So your butt meter will feel down without the bottom end grunt.
Sounds like a good stick car motor.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#5
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I look forward to read about this engine. Can I ask what intake and carb or is that a dum question
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#6
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Quote:
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#7
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He'd have to figure in DA. The conditions on that time slip are at or slightly below sea level. In our neck of the woods at this time of the year add 3 to 5 tenth and subtract 3 to 5 MPH. Just about what my car ran pure stock 25 years ago.
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
#8
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I guess once we see the first run time slip at 3860 lbs we can squabble over the finer technicalities. I have nothing to lose.
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#9
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"It better run faster than 110.68 in the 1/4 at 3860 lbs race weight! It better! "
That will be a good task for a 400 that has a fairly mild cam.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#10
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If the heads flow 240 that is 1 more CFM than mine flowed.
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#11
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My car isn't set up well for this sort of power, but it should run into the 12's without much effort. We'll get some track numbers on it sometime next month.
The engine is being built specifically for the manual transmission/4.30 gear ratio deal, so will fair a lot better in that application than in my car with a tight 10" converter and 3.42 gears. As Skip mentioned, it will probably "feel" like a dog compared to the 455 it's replacing, which will only get me motivated more to get the 455 back in place. I would add that there really isn't anything wrong with the 455, still holds 60psi hot over 2500rpms, and 25-30psi at idle, not using much oil, and making same power as it did when installed. I want to do a couple of things to it, which include new rod bearings, timing set, and check things out. Also going to replace the PRW rockers with Crower Enduro's, and a new set of valve springs for sure. It's been on pump gas for quite a few years at 11 to 1 compression, so I'm curious to see how the internals are holding up?.......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
#12
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Your car is set up to put the power to the pavement very efficiently. Looking forward to the first run's time slip.
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#13
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400 with Unported heads around 10:1 compression factory HFT.
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#14
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It'll definitely be an attention getter at the local Dairy Queen
Cliff's 3.42 gear may not be enough for that 400. Looking forward to seeing how it does in HIS car w/ 3.42 gear and automatic, drive-abilty wise, and performance wise...
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#15
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I had the 3.42 too!! Like I said, it better!!
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#16
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This engine will run well and drive fine in my car, because we have 10.65 to 1 compression in the engine, and Rhoads lifters. This will make for a nice idle quality, and plenty of low end power, with the "real" power coming in just about where my converter stalls at.
With the 3.42's it will have it's tongue hanging out a bit thru the 60', but pull like gangbusters on the rest of the run. It takes 450hp for my car to run 12.0's, 494hp for 11.60's, 514hp for 11.50's, and 550hp to go low 11's. This engine should make a little over 1hp/cid, so it's got enough for some 12 second runs if the moon, stars and everything else line up right for us!.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
#17
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Quote:
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#18
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...but that 041 probably likes more, right? Like every other engine likes more compression?
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#19
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...and those cast pistons looked like they were at the bottom of a well in that cylinder at TDC... Not like yours that sit at the top of the well, eh?
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#20
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MD,
What fuel did you turn those #'s on? What were your 60' times ? On those tires, that's down right impressive! |
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