Valve springs HELP HELP HELP - Page 2

Marco · 01-19-2015, 07:37 PM

Shift it at 58 and 6000 and once the rpm gets back up to around 6 it returns
almost sounds like a fouled plug when it does it

Marco · 01-22-2015, 09:56 AM

Turbo Buick PM sent

Signman · 01-22-2015, 11:39 AM

Marco

Know a little bit of the history of that car. Is your engine flat top or dish piston with 083 head? The HP you provide would be for the dish piston I believe.

Your high RPM miss can be the valve springs but the only real way to know is to take off a couple and check open and seat pressure. The hot ticket right now is conical springs, they have some good qualities but unless this is a max effort conventional springs at lower cost still go down the track.

Check evertything in your ignition. Don't assume because it new it's good.
One time I was having problem with the car slowing, after fixing it was slowing up again! The distributor was not tightened completely when syncing with ECU trying to find the first problem.
Look for dumb stuff.

Look over your fuel and timing maps to be sure nothing was changed by mistake; look over your set up in the software to be sure everything is as it should.
Ask me why I know this.........

Make sure you have fuel pressure and volume, it will miss upstairs if it's real lean. If you data log Air Fuel Ratio it will indicate, if you don't you should. Check the plugs too.

TurboBuick6 · 02-11-2015, 11:05 AM

Marco,

Any updates on the engine?

01-19-2015, 07:37 PM	#11
Marco Junior Member Join Date: Oct 2005 Location: Florida Posts: 73 Likes: 0 Liked 4 Times in 1 Post	Re: Valve springs HELP HELP HELP Shift it at 58 and 6000 and once the rpm gets back up to around 6 it returns almost sounds like a fouled plug when it does it

01-22-2015, 09:56 AM	#12
Marco Junior Member Join Date: Oct 2005 Location: Florida Posts: 73 Likes: 0 Liked 4 Times in 1 Post	Re: Valve springs HELP HELP HELP Turbo Buick PM sent

01-22-2015, 11:39 AM	#13
Signman Senior Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 535 Likes: 22 Liked 269 Times in 99 Posts	Re: Valve springs HELP HELP HELP Marco Know a little bit of the history of that car. Is your engine flat top or dish piston with 083 head? The HP you provide would be for the dish piston I believe. Your high RPM miss can be the valve springs but the only real way to know is to take off a couple and check open and seat pressure. The hot ticket right now is conical springs, they have some good qualities but unless this is a max effort conventional springs at lower cost still go down the track. Check evertything in your ignition. Don't assume because it new it's good. One time I was having problem with the car slowing, after fixing it was slowing up again! The distributor was not tightened completely when syncing with ECU trying to find the first problem. Look for dumb stuff. Look over your fuel and timing maps to be sure nothing was changed by mistake; look over your set up in the software to be sure everything is as it should. Ask me why I know this......... Make sure you have fuel pressure and volume, it will miss upstairs if it's real lean. If you data log Air Fuel Ratio it will indicate, if you don't you should. Check the plugs too. __________________ Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given"

02-11-2015, 11:05 AM	#14
TurboBuick6 Junior Member Join Date: May 2014 Posts: 26 Likes: 0 Liked 0 Times in 0 Posts	Re: Valve springs HELP HELP HELP Marco, Any updates on the engine?