Ready for low boost?
11-27-2021, 10:22 AM
#1
New Member
Thread Starter
Ready for low boost?
Hey guys, I’ve been apart of this forum for a while now and see all the de slander and it’s a joke but I got a 05 regular de with 128k miles mostly highway and driven by an old man. I bought the car bone stock and put about 18k miles on it myself. I do oil changes every 800-1200 miles and plugs every 3k miles so I take pretty good care of the car. Anyways I did a compression test the other day and these were the results:
Cylinder 1: 220
Cylinder 2: 220
Cylinder 3: 215
Cylinder 4: 215
Cylinder 5: 215
Cylinder 6: inbetween 215 and 220
From what I see this is considered pretty high compression because everyone that posts their results are like 160-190 range. Is this a good or bad thing? Should I be worried about boosting this car? The plan was to boost it in the upcoming month or so.
I plan on running it at a reliable 8psi I don’t want more than 400 wheel and 350 torque.
Cylinder 1: 220
Cylinder 2: 220
Cylinder 3: 215
Cylinder 4: 215
Cylinder 5: 215
Cylinder 6: inbetween 215 and 220
From what I see this is considered pretty high compression because everyone that posts their results are like 160-190 range. Is this a good or bad thing? Should I be worried about boosting this car? The plan was to boost it in the upcoming month or so.
I plan on running it at a reliable 8psi I don’t want more than 400 wheel and 350 torque.
11-27-2021, 12:18 PM
#2
350Z-holic
iTrader: (13)
Yea, those are abnormally high compared to OEM numbers.
My question would be what pistons are in the car?
OEM compression should be around 140psi to 180psi for 10.3 to 1.
Did you replace the pistons? Did the previous owner replace the pistons? Is it a built block?
Either your compression tester is reading inaccurately (but at least your numbers are all in the same ballpark) or you have aftermarket high compression pistons is the car.
Feel free to boost the car if you have no other issues.
If you have high compression pistons, like 11:1, than you will only need 6psi to 8psi of boost to make 400hp/350tq.
Assuming you are using a quality synthetic oil and doing filter changes too, you can change your oil 3000 to 5000miles … unless there’s a reason to, 1200mile only change is excessively premature. For reference, I get my pickup oil analyzed by blackstone labs on my 3.5liter ecoboost (ie turbo’d 3.5 liter engine) and they are telling me I can go 10,000 to 12,000 miles between changes based off the remainging amounts of detergent in the oil.
Funny how people clown on the DE yet no one can find a decent running replacement engine. Further, the DE makes more torque than the RevUp, HR, and only a few less Ft-Lbs than the VHR.
My question would be what pistons are in the car?
OEM compression should be around 140psi to 180psi for 10.3 to 1.
Did you replace the pistons? Did the previous owner replace the pistons? Is it a built block?
Either your compression tester is reading inaccurately (but at least your numbers are all in the same ballpark) or you have aftermarket high compression pistons is the car.
Feel free to boost the car if you have no other issues.
If you have high compression pistons, like 11:1, than you will only need 6psi to 8psi of boost to make 400hp/350tq.
Assuming you are using a quality synthetic oil and doing filter changes too, you can change your oil 3000 to 5000miles … unless there’s a reason to, 1200mile only change is excessively premature. For reference, I get my pickup oil analyzed by blackstone labs on my 3.5liter ecoboost (ie turbo’d 3.5 liter engine) and they are telling me I can go 10,000 to 12,000 miles between changes based off the remainging amounts of detergent in the oil.
Funny how people clown on the DE yet no one can find a decent running replacement engine. Further, the DE makes more torque than the RevUp, HR, and only a few less Ft-Lbs than the VHR.
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