Need help choosing cam for lq4 swap
03-05-2018, 08:52 PM
#1
Registered User
Thread Starter
Join Date: Mar 2018
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Need help choosing cam for lq4 swap
Am doing my first ls budget swap and I need help choosing the right cam for my lq4 engine.
lq4 4l80e tranny out off a 2000 suburban 2500 going into a 94 c1500 shortbed am planning on milling the 317 heads .30 any help will be appreciated
lq4 4l80e tranny out off a 2000 suburban 2500 going into a 94 c1500 shortbed am planning on milling the 317 heads .30 any help will be appreciated
03-05-2018, 09:43 PM
#2
What your goals with the setup?
Do you want to retain stock-ish like drive ability?
Stay with the stock torque converter?
I will note this here as well, you will need larger fuel injectors to make sure you have enough head room with fuel on a cam swap. The stock 25lb/hr injectors more often than not are barely big enough for an engine with minor bolt on's before a cam. Consider going to 31lb/hr injectors from a 8.1L engine.
Do you want to retain stock-ish like drive ability?
Stay with the stock torque converter?
I will note this here as well, you will need larger fuel injectors to make sure you have enough head room with fuel on a cam swap. The stock 25lb/hr injectors more often than not are barely big enough for an engine with minor bolt on's before a cam. Consider going to 31lb/hr injectors from a 8.1L engine.
03-05-2018, 09:48 PM
#3
Registered User
Thread Starter
Join Date: Mar 2018
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
What your goals with the setup?
Do you want to retain stock-ish like drive ability?
Stay with the stock torque converter?
I will note this here as well, you will need larger fuel injectors to make sure you have enough head room with fuel on a cam swap. The stock 25lb/hr injectors more often than not are barely big enough for an engine with minor bolt on's before a cam. Consider going to 31lb/hr injectors from a 8.1L engine.
Do you want to retain stock-ish like drive ability?
Stay with the stock torque converter?
I will note this here as well, you will need larger fuel injectors to make sure you have enough head room with fuel on a cam swap. The stock 25lb/hr injectors more often than not are barely big enough for an engine with minor bolt on's before a cam. Consider going to 31lb/hr injectors from a 8.1L engine.
03-05-2018, 09:59 PM
#4
Consider a cam in the 212/218 range. Maybe even slightly larger to up around 212-214/220-224 range or so. The larger you go the more a higher stall torque converter is wanted.
Something like this will be a mild cam that should still get a decent power bump while driving remains very tame.
https://www.briantooleyracing.com/tr...ge-ii-cam.html
Something like this will be a mild cam that should still get a decent power bump while driving remains very tame.
https://www.briantooleyracing.com/tr...ge-ii-cam.html
03-05-2018, 10:16 PM
#5
Registered User
Thread Starter
Join Date: Mar 2018
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Consider a cam in the 212/218 range. Maybe even slightly larger to up around 212-214/220-224 range or so. The larger you go the more a higher stall torque converter is wanted.
Something like this will be a mild cam that should still get a decent power bump while driving remains very tame.
https://www.briantooleyracing.com/tr...ge-ii-cam.html
Something like this will be a mild cam that should still get a decent power bump while driving remains very tame.
https://www.briantooleyracing.com/tr...ge-ii-cam.html
03-05-2018, 10:22 PM
#6
Not unless you go with something crazy stupid big.
I don't know the exact measurements for all cylinder heads but milling those 317's kinda put them in the same ballpark as 243/799's and you can run a decent sized cam with those and not run into valve clearance issues.
I don't know the exact measurements for all cylinder heads but milling those 317's kinda put them in the same ballpark as 243/799's and you can run a decent sized cam with those and not run into valve clearance issues.
03-05-2018, 10:25 PM
#7
Registered User
Thread Starter
Join Date: Mar 2018
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
What size push rod would you recommed and springs or should I keep the stock ones?
Trending Topics
03-06-2018, 12:24 PM
#9
Registered User
Thread Starter
Join Date: Mar 2018
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
How about rollers do I keep the stock ones or do they need to be swaped?