10-10-2019, 08:59 PM | #1 |
Horsepower whisperer
Drives: Camaro Join Date: Jun 2017
Location: MO
Posts: 185
|
4” stroke clearance? Lt1/lt4 Block difference
Had 2 questions:
What if any clearance modification needs to be done to the block for a 4” stroke crank Anyone know what the difference in the lt1/lt4 BARE block? Lt1 part #: 12619171 Lt4 part#: 19329617 Thinking about a winter project if I keep the car and wanted to see if anyone can help me answer these 2 last points. Lastly, aside from on the loose side of spec, does anyone have any bearing clearance, ring gap recommendations for ~15-18lbs of boost? Thanks |
10-10-2019, 09:42 PM | #2 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,797
|
This doesn't answer your question, but More stroke is the last thing you need for boost engine.
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
10-12-2019, 12:01 AM | #3 |
Horsepower whisperer
Drives: Camaro Join Date: Jun 2017
Location: MO
Posts: 185
|
Thanks, just looking for the facts to the question above
|
10-13-2019, 07:54 PM | #4 |
Horsepower whisperer
Drives: Camaro Join Date: Jun 2017
Location: MO
Posts: 185
|
So one thing I found out; it seems piston oil squirter will need to be removed or the block machine for some 4” stroke clearance ones Katech sells. Alternative might be able to just plug the squirters and not run them. Less piston cooling, more bearing oil pressure...
|
10-13-2019, 09:59 PM | #5 |
Drives: 2016 Camaro 2SS Join Date: Apr 2018
Location: Central Texas
Posts: 1,011
|
Talk to Texas Speed as they still use the Piston squirters too.They just did my 427 shortblock and answered all the questions I asked so I don't see why they couldn't answer yours.
|
10-19-2019, 11:16 AM | #6 |
Horsepower whisperer
Drives: Camaro Join Date: Jun 2017
Location: MO
Posts: 185
|
Don’t know if they will freely give someone info that’s didn’t plan on using them to build the block?
Wanted to do some research before jumping in, do the build in a “home” garage and post up a walk through after wards. Didn’t know if there things I would run into: Rod BE clearance to bottom of sleeve Piston skirt to squirter clearance (issue found) Reluctor wheel clearance Cam clearance Main fillet bearing clearance on aftermarket crank Ultimately I was going to document the journey for anyone else that wanted to tackle this in the future and was going to leverage this community to share some knowledge. |
|
|
Post Reply
|
|
|