Recent Thoughts on BluePrint engines? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jsweet · 10-28-2021, 03:39 PM

I've been searching this forum and there are lots of old posts about staying away from BluePrint engines but some recent ones recommending them. What are people's recent experiences? Good/bad?
Debating dropping this 427 in the 72 K5 Blazer
https://blueprintengines.com/product...am-psls4272ctf
TIA

Ziegelsteinfaust · 10-28-2021, 04:54 PM

I have been having problems with my 10.8-1 with a short duration smog legal cam built 383 reverse cooled LT1. So I went to my Carb guy to get a couple of items to continue tuning.

One of the lines he said was my compression maybe to high for a old school set up. As he has had quite a few customers come by with the same issue on blue print engines. He feeling was they were designed for 93 octane, and 91 water we get won't work.

So if you go with a high static, and or dynamic compression version of there engines. This maybe a issue.

burnin oil · 10-28-2021, 09:22 PM

When dealing with the static compression issue I found adding more base timing solves alot of octane headaches. I run 24 degrees of base timing and max at 36. My motor never liked vac advance but this setup has kept an iron block aluminum headed 11.5 400sb happy. Cranking psi is 195psi with 250ish cam duration. Won't work for smog guys but works for non emissions motors. I run 92 octane and only had spark knock once in the last year. It was mild enough to drive around it but could have been fixed with e85 or race gas. I hope that helps with tuning. As far as I have seen they make some pretty good cheap crate motors but have had a slightly higher install issues. If installed by a shop in the US all have been fixed. Individuals and Canadians, good luck. Just what I have seen posted. Personally I would get a local machine shop to build a copy and then they are on the hook. Just my 2 cents.

**The Rocknrod** · 10-28-2021, 09:42 PM

We just had a discussion on that - https://67-72chevytrucks.com/vboard/...=821397&page=2

**The Rocknrod** · 10-29-2021, 11:42 AM

Here is a somewhat long vid on they're factory tour. I watched it and was impressed. - https://youtu.be/Jzr2U8bGpvc

jsweet · 10-29-2021, 02:26 PM

Quote:

Originally Posted by The Rocknrod

We just had a discussion on that - https://67-72chevytrucks.com/vboard/...=821397&page=2

Thanks, I had read through part of that thread but missed a big portion of it.
Posted via Mobile Device

10-28-2021, 03:39 PM	#1
jsweet Registered User Join Date: May 2012 Location: Santa Barbara, CA Posts: 12	Recent Thoughts on BluePrint engines? I've been searching this forum and there are lots of old posts about staying away from BluePrint engines but some recent ones recommending them. What are people's recent experiences? Good/bad? Debating dropping this 427 in the 72 K5 Blazer https://blueprintengines.com/product...am-psls4272ctf TIA

10-28-2021, 04:54 PM	#2
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,560	Re: Recent Thoughts on BluePrint engines? I have been having problems with my 10.8-1 with a short duration smog legal cam built 383 reverse cooled LT1. So I went to my Carb guy to get a couple of items to continue tuning. One of the lines he said was my compression maybe to high for a old school set up. As he has had quite a few customers come by with the same issue on blue print engines. He feeling was they were designed for 93 octane, and 91 water we get won't work. So if you go with a high static, and or dynamic compression version of there engines. This maybe a issue.

10-28-2021, 09:22 PM	#3
burnin oil Registered User Join Date: Jan 2013 Location: Eastern TN Posts: 1,919	Re: Recent Thoughts on BluePrint engines? When dealing with the static compression issue I found adding more base timing solves alot of octane headaches. I run 24 degrees of base timing and max at 36. My motor never liked vac advance but this setup has kept an iron block aluminum headed 11.5 400sb happy. Cranking psi is 195psi with 250ish cam duration. Won't work for smog guys but works for non emissions motors. I run 92 octane and only had spark knock once in the last year. It was mild enough to drive around it but could have been fixed with e85 or race gas. I hope that helps with tuning. As far as I have seen they make some pretty good cheap crate motors but have had a slightly higher install issues. If installed by a shop in the US all have been fixed. Individuals and Canadians, good luck. Just what I have seen posted. Personally I would get a local machine shop to build a copy and then they are on the hook. Just my 2 cents.

10-28-2021, 09:42 PM	#4
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Recent Thoughts on BluePrint engines? We just had a discussion on that - https://67-72chevytrucks.com/vboard/...=821397&page=2 __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-29-2021, 11:42 AM	#5
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Recent Thoughts on BluePrint engines? Here is a somewhat long vid on they're factory tour. I watched it and was impressed. - https://youtu.be/Jzr2U8bGpvc __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?



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