Hi guys sorry not been about for a while lost job money has been tight.still got the car have not run it for since last time,been sat on the drive not using it.should be back on the road in three weeks and hopefully get it down the track soon.
Man reading this thread I almost can't say no to running nitrous this year. I hope to run 3.73s with a 2004r, ta212 cam or slightly larger, some mild workbench head porting, Everyday performance Q-Jet (http://www.v8buick.com/showthread.php?t=193432 :Brow and of course a borrowed set of slicks!! Hell I'd be happy running 14's let alone mid 12's. Especially since all the Chebbie guys insist I have a 17 second car with my 'wimpy' Buick 350
Hi guys just stripped the heads of my car found the engine numbers xc 503 any idea on the year and compression ratio thanks.
Look under the valve covers for a longer number, that will ID the heads: http://www.gesslerheadporting.com/g...8464cf4d587de6d085256e47001720b1!OpenDocument The heads are all about 58 CC, the piston dish and deck height tell you the comrpession ratio. There should be a two digit letter code on the deck of the block on the right side when facing the engine from the front... Right between #1 and #3 cylinders.
I do not have XC in my list of codes... Maybe you have an experimental engine? I would measure the piston depth and report back, if the engine has low comp pistons then it is low comp.
i found this could this be it Welcome to the board Parrish and Kelly! :beer I've been on boards like that and it really rubs me the wrong way. If you know the topic has been covered then why don't you answer for the new guy. :idea2: I could get on a rant. :laugh: I went to buicks.net and found the info your looking for. Scroll down until '73, there are four 350's, depending on carb and exhaust, but you will need the fifth digit of your VIN to tell you which engine you had originally. A 1973 Buick Service Manual will be one of the best tools you can buy. I looked in my '73 manual for the location (buicks.net didnt have the location of the numbers on the 350 after '71) and it is on the drivers side block, between spark plug #1 and #3. The really small part of exposed block not covered by the head. The code will be two letters. VIN____________________Production code G 350-2bbl Dual Exhaust XC H 350-2bbl Single Exhaust XC J 350-4bbl Single Exhaust XB K 350-4bbl Dual Exhaust XB The 1973 Buick Brochure doesn't have the Apollo in either version. I never noticed that. The service manual says Apollo 350-2bbl compression was rated at Compression was 8.5:1 That is all I can help you with, there are alot of Buick 350 gurus on here that can help you with the engine stuff. __________________ Rob 1971 Buick Electra 225 Limited 4dr, 56,934 miles 2008 Buick Lacrosse Super BPG #2020
Yeah, I checked my other computer and the info you posted is correct.... Low comp will work great with the nitrous anyways so all is well...:3gears:
Ok been working on the heads today 6 hours staight.only used a dremel as all we had here are some pick hope you like.can't wait to get on the car.
Ok heads are done to the best i can do with a dremel will be ordering new parts from ta on monday.On inspection of the timing chain found it was badley in need of changing.will be ordering complete top end and timing chain,oil pump and custom cam.As soon as i can get the engine back together will take to the track for a shake down.I can't wait.
There are two places that are common I believe, you have the timing cover right where the oil pressure sender is, normally you would tee off from this spot to retain warning lights. And then there is a modification done to the rear of the block ( http://www.buickperformance.com/Oilmods.htm ) Those are the only methods I know of. I hear the rear is used because in most cases thats where oil pressure signal is the weakest and therefore thats where issues would show up first