5.3 build
03-15-2018, 01:51 AM
#1
Teching In
Thread Starter
Join Date: Jun 2017
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
5.3 build Hello. I have some questions about a 5.3 i am looking to throw together. motor is an 2005 lm7 with gen 4 rods and floating pistons. I am looking to get around 440-475 chp, with a strong overall curve b/c it'll be in a 4k pound c10. I am wondering about cam selection, and compression. From my calculations with my WCCH stage 1 5.3 heads (55cc chamber) that with flat tops compression will be about 11.6/1 and with dished 10.5/1. This motor has to run on pump gas. So would the dynamic compression be too high with a 224ish cam?
Also what cams would you recommend for a setup like this. I was thinking a TSP 223/226 .600"/.600"
Also what cams would you recommend for a setup like this. I was thinking a TSP 223/226 .600"/.600"
03-15-2018, 06:26 AM
#2
Restricted User
Those are both fairly small cams, especially with aftermarket heads and that much compression. You'll want something with at least the exhaust duration in the 230s. 110-112 LSA depending on total duration.
03-15-2018, 11:55 AM
#3
Ok so this is going in a C10 pickup. Auto or manual transmission? If auto stock torque converter or other? What gears are you planning to run? Plan on pulling trailers with it? If so how heavy? 4000 lbs is awful conservative unless it's been put on a serious diet.
A smallish cam might make more sense depending on the answers to The questions above.
A smallish cam might make more sense depending on the answers to The questions above.
03-15-2018, 12:21 PM
#4
Teching In
Thread Starter
Join Date: Jun 2017
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Auto with a 3500 converter, and 3:73 gears out back. only thing it might have would be a 600-700 pound jet ski trailer or a dirtbike in the back. It should weight anywhere from 4200-4500 pounds with driver all loaded down. Weighed 4000 with the stock iron headed 350.
03-15-2018, 01:41 PM
#5
The tx speed stg3 high lift did nearly 450 on their l33 5.3 with stock heads and stock nnbs intake. Why tell him overcam it when youre gonna lose so much bottom end. The stg4 high lift is the biggest id go for a dd truck. use a 2800 stall.
A 3500 stall wont drive well imo.
A 3500 stall wont drive well imo.
03-15-2018, 02:10 PM
#6
TECH Veteran
http://www.trucktrend.com/how-to/engine/1208tr-5-3l-bow-tie-builds-mild-to-wild/
Hope this helps you. Nothing like ALREADY PROVEN combos.
Hope this helps you. Nothing like ALREADY PROVEN combos.
03-15-2018, 02:27 PM
#7
Restricted User
Because 11.6:1 compression. A cam with a narrow LSA and enough advance ground in will make excellent torque and response while being pump gas friendly. He could also lower the stall speed on his converter.
Trending Topics
03-15-2018, 02:32 PM
#8
At that point ptv would be an issue also. Still lacks the cid so trying to throw in a larger cam and then bandaid that with tight lsa and alot of advance vs just going with a small cam that will meet his needs seems counter productive.
Even if not doing "truck things" with it. Id rather be conservative than having a customer hate the cam. Youd be surprised how many people tell me they dont drive their car as much as they would like due to drivability issues or tuning. The cam may be good, but if the tuner isnt, then youre back at the same issue.
Even if not doing "truck things" with it. Id rather be conservative than having a customer hate the cam. Youd be surprised how many people tell me they dont drive their car as much as they would like due to drivability issues or tuning. The cam may be good, but if the tuner isnt, then youre back at the same issue.
03-15-2018, 05:18 PM
#9
Teching In
Thread Starter
Join Date: Jun 2017
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
I was thinking about the circle D 300-3200 stall aswell. Do you think 11.6/1 can be done with a smaller cam and pump gas? I know the dynamic compression goes south with the bigger can you go. I don't wanna over cam this thing, it's gotta be fun to drive not only up top but cruising aswell
Last edited by Gearhart44; 03-15-2018 at 06:52 PM.
03-16-2018, 01:42 PM
#10
Cam specs and not just size change dcr.
I stand by my recommendation and of course i would use nonE premium. Changing to the dish piston setup may be a little easier as the quality of fuel is the real unknown. There is such a thing as too much compression on a heavy vehicle. I tow and haul ALOT and get to see all the differences first hand on my own setups. Even of you dont alot, you have to think about your weight. There is a real reason gm doesnt put high compression engines in trucks esp the heavier ones. Mid to high 10s is the most id recommend really.
I stand by my recommendation and of course i would use nonE premium. Changing to the dish piston setup may be a little easier as the quality of fuel is the real unknown. There is such a thing as too much compression on a heavy vehicle. I tow and haul ALOT and get to see all the differences first hand on my own setups. Even of you dont alot, you have to think about your weight. There is a real reason gm doesnt put high compression engines in trucks esp the heavier ones. Mid to high 10s is the most id recommend really.