Turbo log manifold question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tmills213 · 03-17-2018, 10:26 PM

Should there be any concern about having the primaries straight out like this?? I started with elbow and it was a compound angle PITA. I see the dirty dingo ($$$$) log as the only reference which used straight primaries... will I be fine.

pipe is 1.5 and 2.5" sched 40

davepl · 03-18-2018, 12:24 PM

It's not ideal, but it won't cause any problem that I can think of. I mean old iron log manifolds aren't that much better internally sometimes.

BR3W CITY · 03-18-2018, 12:46 PM

Can you just set the log back a little bit and set the primaries on a low angle? What you want to avoid is the air getting forced out directly into the wall of the tube at a 90* angle.

tmills213 · 03-19-2018, 02:01 PM

when I started with the elbows, the elbow was getting so short compared the to the ID that it was essentially straight. I am also basing my judgments off others i see. does that make it right. no. sigh. I wish i wasn't so cheap

AZ 67 C10 · 03-20-2018, 09:42 PM

Turbulence in your manifolds is a big part of how efficient your turbo is. What you have will work but isn't ideal

03-17-2018, 10:26 PM	#1
tmills213 Registered User Join Date: Jan 2011 Location: Normal il Posts: 173	Turbo log manifold question Should there be any concern about having the primaries straight out like this?? I started with elbow and it was a compound angle PITA. I see the dirty dingo ($$$$) log as the only reference which used straight primaries... will I be fine. pipe is 1.5 and 2.5" sched 40 Attached Images

03-18-2018, 12:24 PM	#2
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Turbo log manifold question It's not ideal, but it won't cause any problem that I can think of. I mean old iron log manifolds aren't that much better internally sometimes. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

03-18-2018, 12:46 PM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Turbo log manifold question Can you just set the log back a little bit and set the primaries on a low angle? What you want to avoid is the air getting forced out directly into the wall of the tube at a 90* angle. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

03-19-2018, 02:01 PM	#4
tmills213 Registered User Join Date: Jan 2011 Location: Normal il Posts: 173	Re: Turbo log manifold question when I started with the elbows, the elbow was getting so short compared the to the ID that it was essentially straight. I am also basing my judgments off others i see. does that make it right. no. sigh. I wish i wasn't so cheap Attached Images

03-20-2018, 09:42 PM	#5
AZ 67 C10 Registered User Join Date: May 2017 Location: Goodyear, AZ Posts: 70	Re: Turbo log manifold question Turbulence in your manifolds is a big part of how efficient your turbo is. What you have will work but isn't ideal

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