The man speaks the truth!
Need to replace distributor...
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 832
Likes: 0
From: Sarasota Florida
Need to replace distributor...
okay so right now i am installing a heavy Summit cam, edelbrock performer intake and 750cfm carb on my engine. i know my compression is over 9:1. here i didn't really think about it before--i have vacuum timing. i would like to switch over to mechanical for a much better response. what brand would you all recommend as far as quality and price?
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
You should never run a street engine without vacuum advance. Set your initial advance at 16 degrees, set the distributer up for 36 degrees mechanical at 2800 RPM and get a vacuum can that will give you about 12 degrees max hooked up to manifold vacuum. 16+20+12=48 BTDC at cruise. That'll work!
BigBlockk
Later.....
BigBlockk
Later.....
Melting Slicks
Joined: Mar 2006
Posts: 3,341
Likes: 7
From: Connecticut
Originally Posted by andylmusic76
okay so right now i am installing a heavy Summit cam, edelbrock performer intake and 750cfm carb on my engine. i know my compression is over 9:1.
What pistons and Heads...If i may ask?
Thanks
Bob
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 832
Likes: 0
From: Sarasota Florida
bob,
sorry i didn't make that clear...i have a problem with that lol. yes the original engine is long gone, and it is replaced with a crate engine, as far as i know, it's just the basic replacement crate engine that's somewhere like 270 bhp. i already replaced the cam, the duration is 224/234 at .050". i'm sorry i don't know more about it than i do.
also, what would be the reason to stick with vacuum over mechanical timing for a street car?
sorry i didn't make that clear...i have a problem with that lol. yes the original engine is long gone, and it is replaced with a crate engine, as far as i know, it's just the basic replacement crate engine that's somewhere like 270 bhp. i already replaced the cam, the duration is 224/234 at .050". i'm sorry i don't know more about it than i do.
also, what would be the reason to stick with vacuum over mechanical timing for a street car?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Originally Posted by andylmusic76
bob,
also, what would be the reason to stick with vacuum over mechanical timing for a street car?
also, what would be the reason to stick with vacuum over mechanical timing for a street car?
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
After MANY similar threads:
My gut tells me root problem is not distributor ... but is too little compression for Summit 224/234 cam.
Intuition says no more than 9:1 SCR ... & probably SUM 1105 (224*/234* .465"/.488").
In lieu of guessing ... Maybe Andy's mechanic can provide head casting numbers, piston & gasket part numbers & machining specs? .... that could facilitate a very useful & reasonable calculation of compression. There are TONS of searchable CF posts about this.
My gut tells me root problem is not distributor ... but is too little compression for Summit 224/234 cam.
Intuition says no more than 9:1 SCR ... & probably SUM 1105 (224*/234* .465"/.488").
In lieu of guessing ... Maybe Andy's mechanic can provide head casting numbers, piston & gasket part numbers & machining specs? .... that could facilitate a very useful & reasonable calculation of compression. There are TONS of searchable CF posts about this.
Melting Slicks
Joined: Mar 2006
Posts: 3,341
Likes: 7
From: Connecticut
Originally Posted by andylmusic76
the original engine is long gone, and it is replaced with a crate engine, as far as i know, it's just the basic replacement crate engine that's somewhere like 270 bhp.
Does you Corvette have the L-82 badge on the hood?
What does the tag below the shifter say?
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 832
Likes: 0
From: Sarasota Florida
jackson,
I have not driven my car yet since he intalled the new cam. up until now i have been using the stock cam, and what i do know is that it is very mild.
bob,
the vin of my car tells me it was an l-48, but it has the basic 270 hp chevy crate engine in it.
I have not driven my car yet since he intalled the new cam. up until now i have been using the stock cam, and what i do know is that it is very mild.
bob,
the vin of my car tells me it was an l-48, but it has the basic 270 hp chevy crate engine in it.
Melting Slicks
Joined: Mar 2006
Posts: 3,341
Likes: 7
From: Connecticut
Originally Posted by andylmusic76
just out of curiosity, what was the bhp rating of the L-48 if rwhp was 180hp?
1975 dropped down to whopping 165
I think they went back up to the 190 in '76
I believe the rating was changed from gross to net for one reason or another during the mid 1970's
