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#70292 - 06/12/12 10:55 PM Re: 250 Eaton build... [Re: Mean buzzen half dozen A.K.A. Hank]
leaded Offline
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Registered: 01/15/06
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Loc: Norway
Yes, Bosch sensors, and did the tetsing at a local car dealer.
Idle approx. 12.3
Cruise 14.6
Wot 12

I know the Holleys is said to be rich at idle, but so much?

Know about the MSD timing master, perhaps later hoped to get this going without. My retarder system function allright for now. (when ignition got the right adjustment)
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#70392 - 06/16/12 02:55 PM Re: 250 Eaton build... [Re: leaded]
Mean buzzen half dozen A.K.A. Hank Offline
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I would think you can do some adjustments/mods to your Holley to get the idle A/F mixture a bit leaner, drill out the idle air passages a hair bigger?

Anymore recent floggings?

MBHD
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#70430 - 06/17/12 02:24 PM Re: 250 Eaton build... [Re: Mean buzzen half dozen A.K.A. Hank]
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Plans to drilling...seems to be only way to go...... Rest of the setup function great, now another pulley on the eaton are in the mail, and the supposed 5,+ PSI are in reach!
Unfortunately my waterpump break down, and more adjustment must wait for this to come!
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#70674 - 07/14/12 11:02 AM Re: 250 Eaton build... [Re: leaded]
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Then everything seems to be nearly in order, PSI boost 5,8, still got to rich mix at idle... but.
Heres a little video of engine running!:
Blown 250 inline six
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#70680 - 07/14/12 12:21 PM Re: 250 Eaton build... [Re: leaded]
Mean buzzen half dozen A.K.A. Hank Offline
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Very cool!

Is that a 6 rib serpentine on a 8 rib pulley?

MBHD
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#70682 - 07/14/12 03:04 PM Re: 250 Eaton build... [Re: Mean buzzen half dozen A.K.A. Hank]
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Yeah! No trouble, no skid, no slipping! Ainīt got a lot of space to my radiator, and each inch who could be excluded, than less work of changing/reworking parts! 8 rib pulley is only at the Eaton, the rest, at crank,idler is 6-rib.

Iīve got my new AFR system now, and its down to 10.3 - 10,5 at idle, approx. 14,6 at cruise, and 11.6 - 12. at WOT. Got some ideas from an old carb guy, and gonna check them out to see if its help...
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#75316 - 05/28/13 05:05 AM Re: 250 Eaton build... [Re: panic]
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I want to share my experiences over a years use, summer & wintertime, on my Eaton M90 charged 250 Chevy. It runs quite good now with approx. 5,5 PSI boost, let tires go if wanted with a TH350 trans terrifying some V8s on the street.. Which difficulties have i seen during this time? First of all, it was a lot of measuring to get everything into the right place, lining up pulleys,get right ones,etc. Building my intake system wasnt so hard..but more about the carb/vacuum side of charger. Adjustments, move & make connections for the right lines, and find out which go there, and who goes on intake. Quite fast when the winter come freezing, showed up need of preheating the carb, it froze in just 15 sec. 30 sec, and throttleplates was also frozen..... Minor vacuum/boost leaks was in need to fixed, and new ones showed up, and my exhaust still need to be repaired - gasketrings just blows out after a short while,fix is in preparation.. Mpg, this is quite similar as before, when driving with a Rochester 2g (now prepared Holley 2bbl 500cfm) when not keeping the throttle to floor most of the time. Torque by experience have raised quite much, hill climbing show it!
Mostly the build was just for fun & show, but this i dont regret, i got a lot more on it!
I tried to find the information to get before building,by books and the web, also got a lot experienced in this forum (THANKS!!! ) and without it,for sure, the engine had been wrecked now... Over here, i didnt find anyone who could give advices, only that i "shouldnt do it on the inline 6, it wouldnt hold up"! Well, it does! And run like a champ too!

Now the hole car is ready to be "cleaned" up, and a lot is going to be teared apart for detailing.....then perhaps the engine get more updates???? The forged pistons,etc. is interesting... ;\)

some shoots....
Eaton powered 1
Eaton powered2


Edited by leaded (05/28/13 05:15 AM)
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#75317 - 05/28/13 08:52 AM Re: 250 Eaton build... [Re: leaded]
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Thanks for the update. It sounds like a fun car. Do you have pictures? We like pictures.
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#75319 - 05/28/13 01:54 PM Re: 250 Eaton build... [Re: Beater of the Pack]
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Here you get some..... :



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#75324 - 05/29/13 11:11 AM Re: 250 Eaton build... [Re: leaded]
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That is pretty wild. I bet it gets a lot of attention and is fun to drive.
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#75355 - 05/31/13 06:10 AM Re: 250 Eaton build... [Re: Beater of the Pack]
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Well...it draw "some" attention yes........ Quite fun to drive, especially with the blower, many wonders what this is, V8? and quite good to drive to. Pinion & rack steering, kingbolts with needle bearings, and adjusted front end geometry, do it nearly like a new car to drive.
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#75450 - 06/08/13 12:48 AM Re: 250 Eaton build... [Re: leaded]
JimW Offline
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Loc: Upstate New York
 Originally Posted By: leaded
Iīve ssen a pic, perhaps the one too.
http://www.killbillet.com/attachment.php?attachmentid=66323&d=1301051042
Nice, but as you said...looong way ,lots of cranking!!


This is the first picture I've seen of a blower on the passenger side. Does anyone have any other pics that show how he mounted the supercharger? I ask because I was considering the same idea, but had never seen a picture of it until this one. Thanks
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#75638 - 06/20/13 10:48 AM Re: 250 Eaton build... [Re: JimW]
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Just do a googlesearch for supercharged chevy inline six, some comes up!
Supercharger is mounted on the intakemanifold, or could be mounted anywhere else with a pipeconnection to the intake, but with a carb, longer distance from carb to intake gets more cranking to start.....
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#75840 - 07/08/13 09:00 AM Re: 250 Eaton build... [Re: leaded]
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Hey can someone confirm these pistons would fit my engine?
TRW FORGED PISTONS PART NUMBER L2396F
STANDARD BORE
250 CHEVY ENGINES 75 THRU 84
INTEGRAL INTAKE AND HEAD (hereīs the question, wouldnīt these fit the engine without integral head? Bore is similar,etc.....)

1.655 COMPRESSION DISTANCE
.073 DISH, CHAMFER
5/64 5/64 3/16 RING LANDS
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#75845 - 07/08/13 05:10 PM Re: 250 Eaton build... [Re: leaded]
Mean buzzen half dozen A.K.A. Hank Offline
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Yep, those will work.
http://www.ebay.com/itm/CHEVY-250-FORGED...1428cff&vxp=mtr
I used them & ran a lot of nitrous with those & detonation & they survived.

They are not the best design, but will do for a low dollar forged piston.

MBHD
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#75851 - 07/09/13 03:16 AM Re: 250 Eaton build... [Re: Mean buzzen half dozen A.K.A. Hank]
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Great A.K.A.Hank, thanks!!
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