Hey guys,
I got my ls1 engine w/ 243 heads all built now, Im putting some ARP rod bolts on today and i wanted to do a cylinder compression check. I went out and bought a compression gauge from NAPA all ready too.
I was wondering what type of PSI numbers am i looking for? Also is there a correct way to check cylinder compression? or do i just crank the engine over a few time by hand? Thanks for the help!
04 Silverado RCSB
02 LS1 Shortblock(Stock)
LS6 CAM - 204/219 .551/.548 117.5
243 Heads w/ Light Weight Valves
Exhast- LT Pacesetters w/ory, 3" Straight pipe
Suspension- DJM 4/6, Doetsch Shocks, Caltracs
Need a ported DBW TB > http://www.ls1truck.com/forums/sale-...ale-trade.html
Equal numbers!! Maybe 130 -150, +- 15 psi. And i don't think doing it by hand is going to spin it fast enough. Got a starter? After 4 or 5 spins it will have reached it's max.
1991 Silverado ECLB
LM7-T56
When I did mine, I pulled out the fuel pump relay, pulled out all of the spark plugs and put the compression tester on one cylinder. I put the gas pedal to the floor to allow the throttle body to open all the way, then cranked the engine with the key for 4-5 revolutions. With only one cylinder building compression, you can easily count the number of revolutions. Record data, move to next cylinder, repeat.
2006 GTO M6 Brazen Orange
2006 Silverado CCSB Duramax
Hey guys,
Cool thanks for the information i know im looking for even numbers but i just wanted to know excatly.. ive head 170-180 and now 130-150psi.
I have the motor outside the truck right now, and yes i do have a starter. Is there a way i can test it before i drop it in the truck. I dont want to have to pulled it out because i have bad compression. Thanks people
Brandon
04 Silverado RCSB
02 LS1 Shortblock(Stock)
LS6 CAM - 204/219 .551/.548 117.5
243 Heads w/ Light Weight Valves
Exhast- LT Pacesetters w/ory, 3" Straight pipe
Suspension- DJM 4/6, Doetsch Shocks, Caltracs
Need a ported DBW TB > http://www.ls1truck.com/forums/sale-...ale-trade.html
wow 180cp is alot on pump gas hahaha...
whats your cr?
02 Sierra... motorless for now.
02 SS.. stock bottom 4.8, 241's, 224-220/116+4, 918's and pushrods, front mount turbonetics 78mm, HKS GTII, TiAL, eBoost2, Yank PT3600, Performabuilt 60e, solid motor mounts. Tuned by me with HP Pro and LM2/AFX
Yeah--bolt up the flexplate to the truck and then bolt up the starter. Get some heavy duty gauge wiring and connect the proper wires to the starter and proper ground. Prop open the TB with something to keep it at WOT. Brace the motor on either side sufficiently so that once you try to crank it that it doesn't flop all over. Make sure you have oil in it--don't wanna try and crank a dry motor... Then, once the plugs are removed, touch the power wire to the battery and have the starter kick the motor over a few times as described above.
2000 ECSB 6.0L
TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's
Posting Permissions
Reply With Quote
