Going FI Finally! Need some pointers...
Thread Starter
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
Likes: 88
From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
Going FI Finally! Need some pointers...
So after about 5 years going back and forth...Iam finally pulling the trigger on this....well that is if my compression and leak down tests look good this weekend...Car has 93,XXX on it so I figured I would like to know what shape it is in before throwing a supercharger on it. Especially with a clutch Iam looking at around $9,000 for everything installed and tuned.
I think I understand how to do the compression test but Iam a little unsure about finding TDC when performing the leak down...can someone who has done this give some pointers or if your close by to middle TN and want to aid and assist by all means let me know! I'll buy the beer!
This is so far everything I know: Please if you can answer the few questions I have and provide any tips I would kindly appreciate it.
https://www.corvetteforum.com/forums...-check-me.html
I think I understand how to do the compression test but Iam a little unsure about finding TDC when performing the leak down...can someone who has done this give some pointers or if your close by to middle TN and want to aid and assist by all means let me know! I'll buy the beer!
This is so far everything I know: Please if you can answer the few questions I have and provide any tips I would kindly appreciate it.
https://www.corvetteforum.com/forums...-check-me.html
Last edited by XtremeVette; Jun 2, 2016 at 10:37 AM.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
It's hard to find TDC on these cars since you can't get easily get to the crank bolt. There's a few ways to do it.
Remove flywheel inspection plate and turn the flywheel by hand (remove spark plugs first). Have a buddy let you know when you're at TDC by using a pick in the spark plug hole or bore scope.
I have used a compression tester hose, removed the Schrader valve, taped a balloon on the end and bumped the starter to right when the balloon stops inflating. It make take a few turns, but you'll get it.
Remove flywheel inspection plate and turn the flywheel by hand (remove spark plugs first). Have a buddy let you know when you're at TDC by using a pick in the spark plug hole or bore scope.
I have used a compression tester hose, removed the Schrader valve, taped a balloon on the end and bumped the starter to right when the balloon stops inflating. It make take a few turns, but you'll get it.
Last edited by CamminC5; Jun 2, 2016 at 03:31 PM.
Thread Starter
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
Likes: 88
From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
It's hard to find TDC on these cars since you get easily get to the crank bolt. There's a few ways to do it.
Remove flywheel inspection plate and turn the flywheel by hand (remove spark plugs first). Have a buddy let you know when you're at TDC by using a pick in the spark plug hole or bore scope.
I have used a compression tester hose, removed the Schrader valve, taped a balloon on the end and bumped the starter to right when the balloon stops inflating. It make take a few turns, but you'll get it.
Remove flywheel inspection plate and turn the flywheel by hand (remove spark plugs first). Have a buddy let you know when you're at TDC by using a pick in the spark plug hole or bore scope.
I have used a compression tester hose, removed the Schrader valve, taped a balloon on the end and bumped the starter to right when the balloon stops inflating. It make take a few turns, but you'll get it.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Not trying to be a dick, but maybe you should take the car to a reputable mechanic for this.
No that's why it's an inspection plate.
You have to pull the steering rack to gain access to the crank bolt. It's a huge PITA. How else are you going to turn the engine over other than how I described?
No that's why it's an inspection plate.
You have to pull the steering rack to gain access to the crank bolt. It's a huge PITA. How else are you going to turn the engine over other than how I described?
Last edited by CamminC5; Jun 2, 2016 at 03:33 PM.
Thread Starter
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
Likes: 88
From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
Not trying to be a dick, but maybe you should take the car to a reputable mechanic for this.
No that's why it's an inspection plate.
You have to pull the steering rack to gain access to the crank bolt. It's a huge PITA. How else are you going to turn the engine over other than how I described?
No that's why it's an inspection plate.
You have to pull the steering rack to gain access to the crank bolt. It's a huge PITA. How else are you going to turn the engine over other than how I described?
If you click on the link I provided...guy on there said simply put in 20 psi and feel for where TBC is. I also have read to put a screwdriver or similar too to feel when TDC is reached. All this while just cranking it over 4-6 seconds. Iam no mechanic nor claim to be one, just going by posts and comments left on the forum.
Last edited by XtremeVette; Jun 2, 2016 at 04:34 PM.
