Recent content by 74Blaze
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Free 383 for Blaze
Should I use the 1.5:1 ratio Rockers from my 350 Crate Motor or the 1.6:1 Ratio Roller Rockers that were on the 383?- 74Blaze
- Post #36
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Ordered most of the parts today. Going with the 383 but with the Heads, Intake & Carb off the 350 Crate Motor. Comp Cams recommended their 08-413-8 Hydraulic Roller Cam. 220°/224° Duration, 0.474" Lift on both. Lobe separation of 111°. I'll have to measure for the Push Rod length. I'm...- 74Blaze
- Post #35
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
@xm20k: A different Cam is definitely in the plan. The one that was in it was spec-ed when the engine was planned to go into the '55 street race application.- 74Blaze
- Post #31
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Thanks to everyone for the advice. I am going to keep researching and figuring out what combination that I should go with. The goal is to build a reliable high torque engine on a budget. I'd like to end-up under $2000 invested in this "free" engine, and that includes the $500ish that will be...- 74Blaze
- Post #28
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
@ChuckN Thanks, I'll do that next. @xm20k Thanks for that information.- 74Blaze
- Post #21
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
ChuckN, you were right about them being 1.94" Heads. Other than that, the engine is checking out to be pretty much what I was told it was. I'm pretty happy with the overall build. Still thinking I'll probably use the Heads off my 290HP 350. That should drop the compression ratio down to...- 74Blaze
- Post #17
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Yeah, I like that set-up better than what I have now (using the Head bolt holes). I'll measure the Valves once I take the Heads off the Block.- 74Blaze
- Post #16
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
They are the old vintage Corvette style Heads. No accessory holes. That was one of difficulties in using them. I would have get creative in mounting my Steering Pump.- 74Blaze
- Post #13
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Thank you, ChuckN. I will do as you suggest. I'm not so worried about the exact compression ratio. What I want to end-up with is a torquier, yet reliable engine so I can better enjoy my Blazer. I'm more convinced that the 383 with the Heads off the GM Performance 350 is the better way to go...- 74Blaze
- Post #9
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
From what I understand the block (Casting number 10243880) can be used with a Roller Cam, but it currently has non-roller solid lifters (which I won't be using). I will be pulling the Heads, unless I decide to use the 2.02" Heads which are currently on it. The engine was completely re-built...- 74Blaze
- Post #7
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Trying to figure out my best options. If I calculate it right. Using the 383 long block with my 290 HP 350 Heads (76cc Combustion Chambers & 8.5:1 Compression) would drop the compression ratio from 11:1 (62cc Combustion Chambers on the 2.02" Heads) to ≈9.4:1. Can somebody check my math?- 74Blaze
- Post #4
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Yep. That's what I was afraid of. They guy used the '55 as a street racer back in the 80s & 90s. I'll need to figure out what Cam I want in it for my trail rig. I don't mind the 11:1 compression as I'm thinking that it should run fine on 91-93 octane with the right Cam. No need to worry...- 74Blaze
- Post #3
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Free 383 for Blaze
Longish story. Blaze has not been running well for over a year. After throwing new parts at it, checking for vacuum leaks..., I finally came to the realization that it more than likely jumped timing. I put the current engine in it in 2007. It is 290 HP GM Crate 350. Yes, I could put a new...- 74Blaze
- Thread
- Replies: 37
- Forum: Engine Swaps (Gas) LS, Vortec, LT1 , etc.
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Wife’s new toy
Wow! I grew up in Fort Wayne, then later worked for Navistar Fort Wayne Engineering Powertrain Group packaging engines in the International trucks for 13 years. Brings back memories of the Fort Wayne plant. It sucked when they shut it down.- 74Blaze
- Post #11
- Forum: Other Vehicles
