reverse flow 350v8 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

odie82 · 02-05-2006, 02:32 PM

a guy at the car show build this motor, a reverse flow engine, ck out were the carbs are and the exhaust, he says it runs but very loud

Lynx · 02-05-2006, 04:59 PM

Now that is differnt.... not sure why you would do that that but cool idea.

chevyfan420 · 02-05-2006, 05:08 PM

how could that be done?

**N2TRUX** · 02-05-2006, 05:20 PM

Quote:

Originally Posted by chevyfan420

how could that be done?

I can see "how" it could be done. I'm just not sure why? I suppose some of his drinking buddies were bench racing and some one offered a challenge.

I think he has too much spare time...

XXL · 02-05-2006, 09:41 PM

Quote:

Originally Posted by N2TRUX

I can see "how" it could be done. I'm just not sure why? I suppose some of his drinking buddies were bench racing and some one offered a challenge.

I think he has too much spare time...

With the sprint car guys sawing small blocks in half to make 4-bangers, this doesn't seem all that surprising.

**N2TRUX** · 02-05-2006, 09:53 PM

Quote:

Originally Posted by XXL

With the sprint car guys sawing small blocks in half to make 4-bangers, this doesn't seem all that surprising.

Yeah, but they do it for a reason. They want a 4 cylinder with readily available aprts and a gazilion hours of knowledge aquired over the years making an SBC go fast.

I can't see any reason for this other than the satisfaction of saying you did it. Don't get me wrong, I ain't saying it was something simple to do. I'm getting a headache just trying to figure out how he got it turning backwards...

*DroppedZ84* · 02-05-2006, 10:08 PM

Notice, that's an LT1..which means "Reverse Flow COOLING SYSTEM"

cliffsta · 02-05-2006, 09:16 PM

I'm confused!

So those are intakes sticking out the side, and those things in the middle of the pipes are carbs? That's exhaust coming out the top? I see the distributor on the front. That's kinda nuts.

79BIG10 · 02-06-2006, 12:31 AM

I was wondering how it cools with the intake ports plugged off where the intake cooling ports are.

70short/step · 02-06-2006, 12:45 AM

Did you see it run?? The valves would be way wrong to run with the exhaust valves using them as intake valves. And visa versa

It does look like the cooling system runs from the original rear intake water passages.

bg67lwb · 02-06-2006, 11:34 AM

In 1965 Jim Clark won the Indy 500 in a Lotus powered by a small block F**d which had been modified similarly. Weber carbs, IIRC, DOHC and a "bundle of snakes" coming out the top of the engine.

Slonaker · 02-06-2006, 05:53 PM

I have seen pics of another car like this. I believe it was an old sprint car.

Slonaker

71chevytruckguy · 02-06-2006, 06:02 PM

looks like some folks have more money and time than sense.

Slonaker · 02-06-2006, 09:31 PM

Quote:

Originally Posted by 71chevytruckguy

looks like some folks have more money and time than sense.

I have none of the above, unfortunately...

Slonaker

Chevrolet4x4s · 02-06-2006, 10:12 PM

So this is what happened to all the 350s.No wonder I can't find a deacent(cheap)350 around here.There all 4 cylinders or bored 80 over

crosby · 02-06-2006, 11:03 PM

Looks like that may have been a marine engine? I know ZERO about boats, but my friend has one with one regular and one reverse rotation 350, which cool through the exhaust manifolds (with sea water). Everything runs backwards except the boat

crosby · 02-06-2006, 11:06 PM

Is the radiator in the back? looks like coolant enters through the water pump, and exits the intake (or is that now an exhaust manifold

) or vice versa. I just want my truck to be all one color. That would be crazy for me....

Chevrolet4x4s · 02-06-2006, 11:26 PM

You not like two tone?

Chevrolet4x4s · 04-22-2006, 07:26 PM

ttt

75Chevy90Kawi · 04-22-2006, 10:40 PM

i don't know how that would work, but i don't know $h!t about $h!t... thats pretty sick though... if for no other reason that the "holy damn!" factor

sixty8c10 · 04-23-2006, 08:50 AM

That's wicked.........any more pics?

**Zoomad75** · 04-24-2006, 01:59 PM

I don't think it's that hard to do. Time consuming yes. All you really have to do to make it run is revise the cam so the former intake lobes are timed for the correct exhaust timing and do the same to make the old exhaust lobes work for the intake events. The engine would still turn in the same direction. Getting a custom cam ground would be the trick. Use small valve (intake side) heads to start with and there is probably enough meat in the head to resize the old exhaust valve (now the intake) to a larger size than the "new" exhaust valve.

Cooling is just a matter of doing the plumbing as this guy did. Spark is another issue, but I think he could have used a regular distibutator, but the cap might need to be wired up differently if he changed from the conventional firing order (dictated by the cam). All, this guy used is a belt driven MSD distributator, probably done since he didn't use anything like the intake to bolt the distributator down too.

Like others have said, its not a new concept. Hot rodders have done this for years on Flathead fords or converting straight 6's with intake and exhaust ports on the same side to a Crossflow with intakes and exhaust ports on opposite sides.

By the way, that engine is definately not a LT1. The timing chain cover is different on LT1 (has a higher peak in the center for the cam-driven water pump).

02-05-2006, 02:32 PM	#1
odie82 Registered User Join Date: Jan 2004 Location: minnesota Posts: 349	reverse flow 350v8 a guy at the car show build this motor, a reverse flow engine, ck out were the carbs are and the exhaust, he says it runs but very loud Attached Images __________________ 1982 chevy C-10, blue 2wd shortbox 17x9 cragar ss rims, 350V8-th400 2003 suzuki gsxr 1000-hit 175mph!!! yeah it's fast-no you can't ride it

02-05-2006, 04:59 PM	#2
Lynx Registered User Join Date: Jun 2003 Location: Fort McMurray, Alberta, Canada Posts: 513	Re: reverse flow 350v8 Now that is differnt.... not sure why you would do that that but cool idea. __________________ Ben 1983 Silverado SWB 305 2002 Silverado Extended Cab 5.3 http://members.shaw.ca/bkennett

02-05-2006, 05:08 PM	#3
chevyfan420 Registered User Join Date: Nov 2003 Location: Ancaster, Ontario, Canada eh Posts: 95	Re: reverse flow 350v8 how could that be done? __________________ 80 Chevy K10 350/350turbo 86 Chevy 1/2 ton shorty project truck 79 Chevy 1/2ton 350/350turbo not much to look at... *Retired* 97 Chevy C1500 4.3/5 speed.....daily driver

02-05-2006, 10:08 PM	#7
DroppedZ84 Account Suspended Join Date: Sep 2005 Location: Nor*Cal Posts: 186	Re: reverse flow 350v8 Notice, that's an LT1..which means "Reverse Flow COOLING SYSTEM"

02-05-2006, 09:16 PM	#8
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Re: reverse flow 350v8 I'm confused! So those are intakes sticking out the side, and those things in the middle of the pipes are carbs? That's exhaust coming out the top? I see the distributor on the front. That's kinda nuts. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

02-06-2006, 12:31 AM	#9
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: reverse flow 350v8 I was wondering how it cools with the intake ports plugged off where the intake cooling ports are. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

02-06-2006, 12:45 AM	#10
70short/step Registered User Join Date: Dec 2003 Location: Stockton, CA Posts: 1,579	Re: reverse flow 350v8 Did you see it run?? The valves would be way wrong to run with the exhaust valves using them as intake valves. And visa versa It does look like the cooling system runs from the original rear intake water passages. __________________ For every person with a spark of genius, There are a hundred with ignition trouble. 70 Short/Step Last edited by 70short/step; 02-06-2006 at 12:47 AM.

02-06-2006, 11:34 AM	#11
bg67lwb Registered User Join Date: Sep 2001 Location: Klamath Falls, OR Posts: 27	Re: reverse flow 350v8 In 1965 Jim Clark won the Indy 500 in a Lotus powered by a small block F**d which had been modified similarly. Weber carbs, IIRC, DOHC and a "bundle of snakes" coming out the top of the engine.

02-06-2006, 05:53 PM	#12
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: reverse flow 350v8 I have seen pics of another car like this. I believe it was an old sprint car. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

02-06-2006, 06:02 PM	#13
71chevytruckguy Registered User Join Date: Jul 2005 Location: Kernersville, NC Posts: 599	Re: reverse flow 350v8 looks like some folks have more money and time than sense. __________________ its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump. 7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's

02-06-2006, 10:12 PM	#15
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: reverse flow 350v8 So this is what happened to all the 350s.No wonder I can't find a deacent(cheap)350 around here.There all 4 cylinders or bored 80 over __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327 Last edited by Chevrolet4x4s; 02-06-2006 at 10:13 PM.

02-06-2006, 11:03 PM	#16
crosby Registered User Join Date: Aug 2004 Location: New Hampshire Posts: 437	Re: reverse flow 350v8 Looks like that may have been a marine engine? I know ZERO about boats, but my friend has one with one regular and one reverse rotation 350, which cool through the exhaust manifolds (with sea water). Everything runs backwards except the boat __________________ Crosby 1978 Chevrolet K10 stepside NH

02-06-2006, 11:06 PM	#17
crosby Registered User Join Date: Aug 2004 Location: New Hampshire Posts: 437	Re: reverse flow 350v8 Is the radiator in the back? looks like coolant enters through the water pump, and exits the intake (or is that now an exhaust manifold ) or vice versa. I just want my truck to be all one color. That would be crazy for me.... __________________ Crosby 1978 Chevrolet K10 stepside NH

02-06-2006, 11:26 PM	#18
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: reverse flow 350v8 You not like two tone? __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327

04-22-2006, 07:26 PM	#19
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: reverse flow 350v8 ttt __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327



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04-22-2006, 10:40 PM	#20
75Chevy90Kawi the green machine Join Date: Oct 2004 Location: marysville washington Posts: 333	Re: reverse flow 350v8 i don't know how that would work, but i don't know $h!t about $h!t... thats pretty sick though... if for no other reason that the "holy damn!" factor __________________ 1975 Silverado - 450 horse crate 383 stroker, 20" Centerlines, Flowmaster exhaust, Hooker headers, full MSD ignition & more... 2003 Suzuki TL1000R 1985 Kawasaki JS550 hull - project ski - WILL have - 650, footholds, custom paint, 4* bars, bilge setup, and more... My pictures

04-23-2006, 08:50 AM	#21
sixty8c10 MY EX DRIVES A BROOM Join Date: Nov 2003 Location: Herington, KS Posts: 869	Re: reverse flow 350v8 That's wicked.........any more pics? __________________ They say nobody's perfect. I'm a nobody, so I must be perfect. Building Nemo -1968 C10 Long Bed FRED -1947 KB-2 International

04-24-2006, 01:59 PM	#22
Zoomad75 K5Camper Join Date: Mar 2004 Location: Pueblo, CO Posts: 1,513	Re: reverse flow 350v8 I don't think it's that hard to do. Time consuming yes. All you really have to do to make it run is revise the cam so the former intake lobes are timed for the correct exhaust timing and do the same to make the old exhaust lobes work for the intake events. The engine would still turn in the same direction. Getting a custom cam ground would be the trick. Use small valve (intake side) heads to start with and there is probably enough meat in the head to resize the old exhaust valve (now the intake) to a larger size than the "new" exhaust valve. Cooling is just a matter of doing the plumbing as this guy did. Spark is another issue, but I think he could have used a regular distibutator, but the cap might need to be wired up differently if he changed from the conventional firing order (dictated by the cam). All, this guy used is a belt driven MSD distributator, probably done since he didn't use anything like the intake to bolt the distributator down too. Like others have said, its not a new concept. Hot rodders have done this for years on Flathead fords or converting straight 6's with intake and exhaust ports on the same side to a Crossflow with intakes and exhaust ports on opposite sides. By the way, that engine is definately not a LT1. The timing chain cover is different on LT1 (has a higher peak in the center for the cam-driven water pump). __________________ Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper

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